# i need the exat percentage of nitrogen in magnesium nitride

6,975 results, page 56-
## Math - I really need help, please.

A town has a population of 8400 i 1990. Fifteen years later, it's population grew to 12500. Determine the average annual growth rate of this town's population. I really don't understand this problem. I've been going at it for hours and all I've come to is

*asked by Lacey on November 3, 2008* -
## Math

Land growing continuous grain corn as a cash crop loses soil at a rate of 14.0 metric tonnes ha-1 yr-1. This is a fertile soil, which has an organic matter content of 3.8% and nitrogen content of 0.35% (both by mass). a)Calculate how long it will take to

*asked by Ramya on November 12, 2009* -
## Lincoln College Of New En

The percentage of physicians who are women is 27.9% in a survey of physicians employed by a large university health system, 45 of 120 randomly selected physicians were women. Is there sufficient evidence at the 0.05 level of significance to conclude that

*asked by Paula on April 26, 2013* -
## Help w/Quattro Formula

Am getting frustrated w/failing to get Quattro Pro formula right. Here's what I'm looking for: Col. A = Base period number Col. B = Given number this current period. Formula I need: If B >= A, what is %? (Example: A=20, B=30, the # I want should read 50.0,

*asked by Al on July 20, 2006* -
## Business math

A watch with a list price of $889.00 is sold by a wholesaler at a net cost of $545.75. Find the single trade discount rate being offered. round to the nearest tenth of a percent 889.00*61.4? since trade discount equals list price * trade discount

*asked by Anonymous on February 27, 2015* -
## ctu

Stuart’s car loan reached a maturity value of $14001.00 after 3 years. Find the rate on Stuart’s loan if the principal he borrowed was $12474.00 Use the formula to find the interest; then use to find the rate in decimal form. Leave your answer in

*asked by mary on September 29, 2015* -
## World Geography

REVIEW 1.Canada currently ranks first in the world in which category? A. Total number of Internet users B. Percentage of college and university graduates

*asked by bre on April 5, 2013* -
## math

Suppose a third world country in the last five years is now expanding their Internet access. If they went from 2.5% of their citizens having access to the Internet to 7.5% now having access, calculate the following: a) How many percentage points did they

*asked by tiffany on May 9, 2013* -
## MATH

Suppose a third world country in the last five years is now expanding their Internet access. If they went from 2.5% of their citizens having access to the Internet to 7.5% now having access, calculate the following: a) How many percentage points did they

*asked by jess on May 9, 2013* -
## maths

in a class both boys and girls ratio is 4:5.. if boys percentage is 25% of girls ...so hiw many girls are in a class..

*asked by hardik on April 15, 2016* -
## math

there are seven pieces of blue marbles and 43 pieces of red marbles.is the blue marbles what percentage of the total?

*asked by reiou on May 26, 2013* -
## Math

Can you help me solve this problem...? A teacher said to a pupil: To the nearest per cent, 1/6 is 17% The pupil said: So, to the nearest per cent, 2/6 must be 34% Show that the pupil is wrong. *How do you work it out? it is 33% because: the percentage

*asked by Claire on January 18, 2007* -
## math

The Mills Lunch Shop prepares fresh take-out entrees each day. On Tuesday, 40 baked chicken dinners were prepared at a cost of $3.20 each. A 20% spoilage rate is anticipated. Mills Lunch Shop sells the dinners at an 80% markup based on cost. They decided

*asked by Anonymous on March 2, 2014* -
## math

Let f(t) = Q0at = Q0(1 + r)t. f(7) = 75.94 and f(9) = 91.89 (a) Find the base, a. (Round your answer to two decimal place.) a = (b) Find the percentage growth rate, r. (Round your answer to the nearest percent.) r = % I honestly have no idea how to

*asked by Stella on August 29, 2015* -
## Math

The Mills Lunch Shop prepares fresh take-out entrees each day. On Tuesday, 40 baked chicken dinners were prepared at a cost of $3.20 each. A 20% spoilage rate is anticipated. Mills Lunch Shop sells the dinners at an 80% markup based on cost. They decided

*asked by Mike on March 6, 2014* -
## Math

The Mills Lunch Shop prepares fresh take-out entrees each day. On Tuesday, 40 baked chicken dinners were prepared at a cost of $3.20 each. A 20% spoilage rate is anticipated. Mills Lunch Shop sells the dinners at an 80% markup based on cost. They decided

*asked by jnet on February 28, 2014* -
## college busines math

*asked by jessica on March 1, 2014* -
## Chemistry

Barium sulfate forms as a precipitate in the following reaction: Ba(NO3)2 (aq) + Na2SO4 (aq) -> BaSO4 (s) + 2NaNo3 (aq) When 35.0g of Ba(nO3)s is reacted with excess Na2SO4, 29.8g of BaSO4 is recovered by the chemist. a) Calculate the theoretical yield of

*asked by Anonymous on April 26, 2011* -
## maths

6 out of 20 apples were rotten what percentage of the apples were rotten

*asked by Anna on August 23, 2014* -
## stat

A company’s CEO wanted to estimate the percentage of defective product per shipment. In a sample containing 500 products, he found 30 defective products. (a) Find a 98% confidence interval for the true proportion of defective product. Show your

*asked by me,me on August 20, 2011* -
## chemistry

A mixture of 3.00 g of silver and copper metals was dissolved in excess nitric acid. Resulting salts, silver(I) nitrate and copper(II) nitrate, were isolated and dissolved in enough water to make 0.100 L of a solution with a total concentration of the

*asked by al on September 29, 2014* -
## Science - Electrochemistry

In an experiment 0.0500 M AgNO3 was used to titrate 20 mL of 0.12 M NaCl solution. When silver electrode is used together with the pH electrode to measure potential at each point during the titration, the potential measured at equivalence point is 0.055 V.

*asked by Sarah Lee on November 10, 2016* -
## PHYSICS

Two balls collide on a horizontal, frictionless table. Ball A has a mass of 0.175 kg and travelling at 1.20 m/s [E 40o S]. Ball B has a mass of 0.225 kg and is travelling at 0.68 m/s [E]. The velocity of ball B after collision is 0.93 m/s [E 23o S].

*asked by myra on May 11, 2012* -
## Chemistry

Barium sulfate, BaSO4 is made by the following reaction. Ba(NO3)2(aq) + Na2SO4(aq)----> BaSO4(s) + 2NaNO3(aq) An experiment was begun with 91.77 g of Ba(NO3)2 and an excess of Na2SO4. After collecting and drying the product, 62.3 g of BaSO4 was obtained.

*asked by David on April 3, 2010* -
## Math

You are working as an office apprentice for a collage. The collage is giving away free tickets to encourage more people to visit the amateur sport tournaments the collage is planning to host. Every time a customer purchases a ticket they are entered into a

*asked by Kiara on March 6, 2017* -
## chemistry

b. Methanol, CH3OH, which can be used as a fuel, can be formed by the reaction between carbon monoxide and hydrogen as depicted in the following balanced equation. 2H2 + CO ¨ CH3OH Suppose 356 g of CO and 65 g of H2 are mixed and allowed to react. (i)

*asked by jenny on December 28, 2011* -
## COMPUTER HARDWARE MANAGEMENT

how can you obtain real-time ,current information in Windows NT /200/xp about the 1)number of memory pages per second 2) average disk quee length and 3) percentage of processor time being utilized a) type perform in the run dialog box and click OK b)go to

*asked by vedrana on November 30, 2011* -
## general chemistry

I need the oxidation half reactions, reduction half reactions, and net ionic equations for the following reactions: 1)magnesium +0.1M zinc sulfate 2)copper+0.1M zinc sulfate 3)zinc+0.1M copper(II)sulfate 4)zinc+3M HCl 5)copper+3M HCl 6)0.1M potassium

*asked by masooma on November 13, 2010* -
## Math

Ben had 20 books.He read 5 books.What percentage of the books had he read?

*asked by Asyirah on September 4, 2016* -
## mathematics literacy

There are seven red peppermints in a packet of 22 peppermints.what percentage of the peppermints are red?

*asked by kaycee lee on February 17, 2015* -
## biology

a class of pupils obtained results on a bar chart during a seashore investigation. they sampled the numbers of different seaweeds found in 0.25 m2 from the top shore (upper shore) to lower shore and found average percentage cover for each seaweed. describe

*asked by jane on March 25, 2012* -
## Math

Seven students took a quiz. Four of these students received a score above 85 percent. Students who received at least an 85 percent go a sticker. What percent of the students ( rounded to the nearest full percentage number) received a sticker? I came up

*asked by Carol Kelly on May 23, 2016* -
## prealgebra/ check answer please

John who is an amateur golfer spends 3 hours every day practicing golf. What percentage of his waking hours does John spend practicing golf if he sleeps 9 hours a day? 24-9=15 3/15= 0.2 0.2 x 100 = 20% spent practicing

*asked by logan on June 24, 2012* -
## Chemistry

Nitric acid is commonly purchased as a 16 M solution, which has a density of 1.41 g/mL. Convert this molarity to a) mass percentage, b) molality, c) mole fraction. A) 16molHNO3(63.02HNO3/1MolHNO3)=1,008.32gHNO3 - 1,000gH20(1MolH20/1.41ml/g)=1410ml/mol w/w=

*asked by Michael on May 27, 2013* -
## math

Each week, Bart earns a base rate of $85 and a commission on each dollar of merchandise he sells. If Bart sells $3600 in one week and c represents the commission percentage, which algebraic expression represents his earnings for that week? would the answer

*asked by jill on October 3, 2012* -
## science

A coach tells his little league players that hitting a 0.275 batting average, within 7% percentage error, means that they had a really great season. Seven year old Tommy ended the season hitting a 0.258 batting average. According to his coach, did he have

*asked by angel on August 22, 2017* -
## Organic Chemistry

What is the optical purity of a partially racemized product is the calculated specific rotation is -8◦ and the pure enantiomer has a specific rotation of -10◦? Calculate the percentage of each of the enantiomers in the partially racemized product. I'm

*asked by nicole on November 27, 2015* -
## College Math

Ted stops by a club every Friday night and spends $50. He also spends $350 each month on groceries. Ted's spending at the club is what percentage of his groceries expenses. Assume that 4 Friday's per month.

*asked by Jasmine on August 27, 2016* -
## Chem

A mixture of 5.00 g of sodium carbonate, Na2CO3 and sodium hydrogen carbonate, NaHCO3 is heated. The loss in mass is 0.31 g. Sodium carbonate does not decompose on heating. Calculate the percentage by mass of sodium carbonate in the mixture.

*asked by Anonymous on June 15, 2015* -
## STATISTICS

In a survey of 1000 registered U.S. voters, 55% respond that they support health care reform. What is the 95% confidence interval for the true percentage of U.S. registered voters who support health care reform? 50%-60% 55%-60% 51%-59% 52%-58% 49%-47%

*asked by Susie on August 6, 2013* -
## math, 7th

If there are 100 marbles, 10 red, 20 white, 30 blue, and 40 green, and you were to choose only one out of a bag, what is the probability that it wouldn't be red, white, or blue? The probability would be 40 out of 100 -- or 4 out of 10. What percentage is

*asked by morgan on February 25, 2007* -
## statistics

In determining monthly seasonal indexes for gas consumption, the sum of the 12 means for gas consumption as a percentage of the moving average is 1150. To get the seasonal indexes, each of the 12 monthly means is to be multiplied by?

*asked by Danny on August 25, 2009* -
## buisness statics

Mean yearly salary of employes of a company wasRs20,000.mean yearly sakaries of male and female employes were Rs 20,800 and 16,800.find out the percentage of male and female employed by the company??b

*asked by simran on July 29, 2014* -
## chemistry

A sample of solid KCl (potassium chloride) weighing 0.500 g is mixed with an unweighed sample of solid MgCl2 (magnesium chloride) and the mixture is then completely dissolved in water to form a clear solution. An aqueous solution of AgNO3 (silver nitrate)

*asked by Anonymous on October 6, 2010* -
## AP Chem

A sample of solid KCl (potassium chloride) weighing 0.500 g is mixed with an unweighed sample of solid MgCl2 (magnesium chloride) and the mixture is then completely dissolved in water to form a clear solution. An aqueous solution of AgNO3 (silver nitrate)

*asked by benji on October 6, 2010* -
## Biology

Which of the following statements correctly compares the functions of a plant's roots and stem? The stem contains a high percentage of cells that provide structural support, unlike the roots. The stem is the first part of the plant to emerge from a seed,

*asked by Madi on September 28, 2012* -
## math

A company begins a radio advertising campaign in Chicago to market a new soft drink. The percentage of the target market that buys a soft drink is estimated by the function f(t)=100(1-e^-0.01t), where t is the number of days of the campaign. After how long

*asked by julie on April 24, 2012* -
## KCKCC

A researcher believes that the percentage of people who exercise in California is greater than the national exercise rate. The national rate is 20%. The researcher gathers a random sample of 120 individuals who live in California and finds that the number

*asked by Tina on November 9, 2014* -
## technology

What is one of the strengths of line graphs? a) Line graphs show percentage in a whole b) Line graphs show change over time c) Line graphs compare values of individual groups or categories. d) Line graphs always show averages My answer is C

*asked by StarWars The Force Awakens I Love Star Wars Legos on November 7, 2017* -
## math

Suppose that a ball has a rebound percentage of 75 and the ball is dropped from a height of 5ft onto the concrete below. Make a table of the data. Write a recursive rule for the data. Write a closed-form function rule for the data. What would the height of

*asked by Lola on March 2, 2013* -
## chem

Show work 1. How many moles of oxygen will occupy a volume of 2.50 liters at 121.6 kPa and 331 K? 2. An unknown volume of chlorine gas (Cl2) is resting at 127 °C at a of pressure 152.4 kPa. If the gas weighs 191.4 g, what is the volume? 3. A 2.917 mole

*asked by theresa on February 22, 2015* -
## electrical

A 35 kVA transformer supplies a load of 12 kW at a power factor of 0.45 lagging. Find the percentage of full load the transformer is carrying. If additional unity power factor loads are to be served with the same transformer, how many kW may be added

*asked by ram on January 13, 2012* -
## Easy physics...having trouble with part b

Moon effect. Some people believe that the Moon controls their activities. If the Moon moves from being directly on the opposite side of Earth from you to being directly overhead, by what percentage does (a) the Moon's gravitational pull on you increase and

*asked by Rodrick on May 2, 2014* -
## Finance

National Telephone and Telegraph (NTT) Company common stock currentyl sells for $60 per share. NTT is expected to pay $4 dividend during the coming year, and the price of the stock is expected to increase to $65 a year from now. Determine the expected

*asked by Greatdanelola on September 21, 2008* -
## Algebra/Trig

The members of a men’s club have a choice of wearing black or red vests to their club meetings. A study done over a period of many years determined that the percentage of black vests worn is 60%. If there are 10 men at a club meeting on a given night,

*asked by jelanietux on June 20, 2011* -
## Statistics

A researcher believes that the percentage of people who exercise in California is greater than the national exercise rate. The national rate is 20%. The researcher gathers a random sample of 120 individuals who live in California and finds that the number

*asked by Angelica on May 11, 2014* -
## Chemistry

The formaldehyde content of a pesticide preparation was determined by weighing 0.3124g of the liquid sample into a flask containing 50.0mL of 0.0996M NaOH and 50mL of 3% H2O2. Upon heating, the following reaction took place: OH- + HCHO + H2O2 -> HCOO- +

*asked by Ellen on March 28, 2012* -
## math

The image of the public library is constantly changing, and their online services continue to grow. Usage of the library's home page grew by 17% during the past 12 months. It has been estimated that the current average length of a visit to the library's

*asked by Sue 8 on June 21, 2013* -
## Algebra HELP!

The student bookstore had a textbook for sale at $89.95. A student found the textbook on eBay for $62.00. If the student bought the book on eBay, what percentage of the cost of the bookstore book did she save?

*asked by Rose on October 21, 2014* -
## math

Water is being poured into a conical cup that is 12cm tall. a) When the water in the cup is 9cm deep, what percentage of the cup is filled? b) When the cup is 75 percent filled, how deep is the water?

*asked by Grace on April 9, 2017* -
## Math

Ken planted 8 flowers and 4 shrubs in his mother's garden. He ran out of fertilizer before he planted 2 of the flowers and 1 of the shrubs, so he planted them without fertilizer. What percentage of plants were planted without fertilizer? A. 12.5% B.25% C.

*asked by Kris on December 11, 2014* -
## Statistics

Based on data collected by the National Center for Health Statistics and made available to the public in the Sample Adult database (A-5), an estimate of the percentage of adults who have at some point in their life been told they have hypertension is 23.53

*asked by Vanessa on March 15, 2017* -
## statistics

Women’s heights are normally distributed with a mean of 162 cm and standard deviation of 16 cm. a. Define an random variable, X, and describe its full distribution including the mean and variance. b. What percentage of heights are greater than 180 cm ?

*asked by Jasmine on December 5, 2011* -
## Sampling

What stratification variable(s) would you use for each of the following situations: a An e-mail survey of students at your university to estimate the total amount of money student spend on textbooks in a term b A sample of high schools in New York City to

*asked by Lati on November 3, 2014* -
## Chemisry

Write a balanced equation using the correct formulas and include conditions (s,l,g or aq) for each of the following reactions. 1)Carbon monoxide gas reacts oxygen gas to produce carbon dioxide gas. Express your answer as a chemical equation. Identify all

*asked by TMV on November 15, 2010* -
## statistic

Chebyshev's thereon- the author's generac produces voltage amounts with a mean of 125.0 volts and a standard deviation of 0.3 volt. using chebyshev's theorem,what do we know about the percentage of voltage amounts that are within 3 standard deviations of

*asked by marie on September 18, 2011* -
## math

Write each of the following as a common fraction or mixed number. Write your answer in lowest terms. 28. 15.35 Complete each of the following statements, using the symbol < or > 30. 5/16 0.313 34. Statistics. The following table gives the winning

*asked by dawn on June 24, 2008* -
## Lang. Arts

select the pronoun that belongs in the underlined space. 1.___ of the people in Sri Lanka are Sinhalese,2._______are Buddhist by tradition. A smaller percentage are Tamil, of Hindu background. Civil wars have torn apart the small nation,3._____is a bloody

*asked by Cassie on May 10, 2013* -
## Math -___-

The table below shows the percentage of households that own a microwave in different countries. Constuct a stem-and-leaf plot of the data. Use the ‘|’ key (Shift + \ on most keyboards, just beside the backspace key) to create the line between the stems

*asked by Sally on May 17, 2014* -
## math

the population of Ling is partly english and partly french.If 80% speak english and 70% speak french,what percentage speak both languages?

*asked by wan on November 13, 2012* -
## statistics

a) What is the standard deviation of the set of data? b) What raw score will have 15% of the data set above it? c) If I have a raw score of 21 what percentage of the scores, are below my score? 16, 16, 89, 76, 24, 45, 98, 20, 22, 28, 34, 35, 76, 67, 48, 37

*asked by anika on October 11, 2014* -
## Calculus

Estimate delta f using linear approximation F(x) = x^ (1/3)e^(x-1), a=1, delta x = 0.4 linear approximation for delta f = Error is = Percentage error is = please explain tburoughly

*asked by Narimen on November 1, 2011* -
## physics

You have a box that contains 200 marbles. 99% of the marbles are green, the other 1% are white. How many green marbles would you have to remove from the box to reduce the percentage of green marbles to 98%?

*asked by Poop on June 10, 2014* -
## Chemistry

Identify the following chemical equations by type. 1. If an electric discharge produces 800 cm3 of ozone (O3), how many cm3 of oxygen (O2) are required? 3O2(g) ---> 2O3(g) 2. When 75.0 dm3 of O2 react with an excess of glucose (C6H12O2), according to the

*asked by Rikki on September 30, 2014* -
## Distillation Lab Calculations

I had to do a fractional distillation while my lab partner did a simple distillation. I had 2 unknown compounds which could have been any of the following: heptane, cyclohexane, toulene, octane, Well I think I went and boiled the solution a little too

*asked by ~christina~ on September 27, 2007* -
## physics

If the speed of the cart at the first photogate is 2.3 m/s, and the speed of the cart at the first photogate is 1.8 m/s, what is the percentage change in the speed of the cart (LEAVE OUT the % symbol)?

*asked by Ali on March 20, 2014* -
## Math

The interest rate on a second mortgage was % last year. This year the interest rate is %. How many percentage points has the interest rate increased?

*asked by Anonymous on November 7, 2008* -
## Math

The interest rate on a second mortgage was 8 3/4%last month. This month the interest rate is 11 1/8%. How many percentage points has the interest rate increased?

*asked by Teri on March 23, 2008* -
## CHEM Help!

My homework is about translating word equations and I need help in answering this question. Sodium phosphate reacts with calcium nitrate to produce sodium nitrate and calcium phosphate. What would be the answer? I also need help with this other question

*asked by Anony on March 11, 2008* -
## stat

A poll of 1000 registered voters reveals that 480 of the voters surveyed prefer the Democratic candidate for the presidency. At the 0.05 level of significance, do the data provide sufficient evidence to conclude that the percentage of voters who prefer the

*asked by Joe on December 13, 2015* -
## stat

A poll of 1000 registered voters reveals that 480 of the voters surveyed prefer the Democratic candidate for the presidency. At the 0.05 level of significance, do the data provide sufficient evidence to conclude that the percentage of voters who prefer the

*asked by Joe on December 13, 2015* -
## chemistry

1.000 g of bronze was dissolved in the mixture of acids. The solution was transferred into 100 ml volumetric flask and filled to the mark. 10 ml aliquote of this solution was transferred into another 100 ml flask and diluted to the mark. 10 ml of the

*asked by EMEKA on September 16, 2016* -
## Chemistry

The toxic metal cadmium Cd2+ has a tendency to complex with as many as 4 Cl- ions. The complexation reactions can be written as: Cd2+ + Cl- ---> CdCl+ ``````` log Kf,1 = 1.98 Cd2+ + 2Cl- ---> CdCl20 `````` log Kf,2 =2.60 Cd2+ + 3Cl- ---> CdCl3- `````` log

*asked by Will on September 15, 2016* -
## NEED HELP WITH CHEMISTRY HW

Ascorbic acid (vitamin C) is a diprotic acid having the formula H2C6H6O6. A sample of a vitamin supplement was analyzed by titrating a 0.2894 g sample dissolved in water with 0.0215 M NaOH. A volume of 10.83 mL of the base was required to completely

*asked by Anonymous on October 1, 2011* -
## Chem

volume = 322 mL temperature = 150 celcius pressure = 175 kPa mass = 0.448 Calculate the molar mass of the gas. First I converted volume to 0.332 L. Second I converted 150 celcius into 423 kelvin. PV = nRt (175)(0.322) = n(8.314)(423) n= 0.016022988 molar

*asked by Lena on July 6, 2009* -
## Pre-Algebra

A survey about the student government program at school finds of 245 students: • 218 students like the program • 27 students think the program is unnecessary If a circle graph were made from this data, what would the measure of the central angle be for

*asked by Buhgingi on March 8, 2018* -
## Chemistry - acid base

A 50.0 mL sample of 1.50×10−2 M Na2SO4(aq) is added to 50.0 mL of 1.23×10−2 M Ca(NO3)2(aq). What percentage of the Ca2+ remains unprecipitated? What I did n=CV Na2SO4 = (1.50×10−2 M)(0.05L) = 0.00075 Ca(NO3)2 = (1.23×10−2 M)(0.05L) = 0.000615

*asked by K on March 10, 2018* -
## ECON 2

False signals. A procedure has been designed that will detect 99% of the defective assemblies in a manufacturing process. However, the probability that the procedure will declare a good assembly defective is 0.05. If 2% of all assemblies are defective,

*asked by Nina on September 20, 2012* -
## Chenistry

A 0.8870g sample of a mixture of nacl and kcl is dissolved in water and the solution is then treated with an excess of agn03 to yield 1.913g of agcl. Calculate the percentage by mass of nacl in the mixture 1.913g/ 143 = 0.0133 M agcl x/58 + Y/74 (0.887g-x)

*asked by Carlos on January 19, 2014* -
## chemistry

what is the percentage of water in the hydrate (Na2Co3)(10H20)? step by step and solution please? big quiz today!! step1. find the mol mass of Na2CO3 2) find the mol mass of H2O percent water= [10*molmassH2O / (molmassNa2CO2 +10*molmassH2O) ] *100

*asked by crystine cole on April 12, 2007* -
## FIN200

Suppose that a year later, NTT's common stock is selling for $75 per share. During the 1 year period, NTT paid a $4 common stock dividend. Determine the realized (ex-post) percentage holding period return on NTT common stock

*asked by edgar on August 12, 2008* -
## chemistry help!

Potassium has an atomic mass of 39.10amu. a sample of potassium is made up of isotopes potassium-39 (mass=38.964) and potassium-41(mass =40.962 amu). What percentage of the potassium sample is potassium-39? what percent of the sample is potassium-41?

*asked by Skylar on October 20, 2011* -
## chemistry

Some distilled water is added to an empty beaker. A gram of copper(II) nitrate is added to the beaker with stirring. After a few minutes, what is in the beaker? a. solid copper(II) nitrate and water b. nitrogen gas, copper atoms, electrons, and water c. a

*asked by john on January 29, 2011* -
## Chemistry, pre Algebra

Glycopyrrolste comes in quantity of 25 vials and has an AWP of $135.the store has an agreement with the contractor to purchase that chemical at the AWP minus 10% the insurer is willing to pay the AWP plus 3 % plus a $4 dispensing fee. a patient on this

*asked by Kate on March 23, 2015* -
## statistics

Sweden is reported to have among the highest percentage of citizens aged 80 years and over, at approximately 5.5 % (i.e. 5.5 % of it's population falls within this age category). Suppose 20 individuals are randomly selected from the population, and X is

*asked by Brittany on February 5, 2012* -
## Chemistry

A 0.700 g sample containing Ag2O and inert material is heated, causing the silver oxide to decompose according to the following equation: 2 Ag2O(s) → 4 Ag(s) + O2(g) If 13.8 mL of gas are collected over water at 27°C and 1.00 atm external pressure, what

*asked by Alexa on October 8, 2014* -
## MATH

Chemistry of Life Multiple Choice 1. Which of the following form the main components of our body cells? carbohydrates and proteins fat and phosphorous proteins and iron nucleic acids and calcium 2. Organic compounds always contain______. water oxygen

*asked by Help!!!!!!!!!!!!!! Fast its urgent Please!!!!!!!!! on December 7, 2012* -
## Math

Chemistry of Life Multiple Choice 1. Which of the following form the main components of our body cells? carbohydrates and proteins fat and phosphorous proteins and iron nucleic acids and calcium 2. Organic compounds always contain______. water oxygen

*asked by Briana T on December 7, 2012* -
## Stats

The probability that a randomly selected individual in a certain community has made an online purchase is 0.40 . Suppose that a sample of 13 people from the community is selected, what is the probability that at most 3 of them has made an online purchase?

*asked by Semmy on October 13, 2015* -
## Math

Last one! Please help! South America's total population was 515,000,000 and the world's total population was 6,279,000,000. What percentage was South America rounded to the nearest tenth?

*asked by Sadie on February 23, 2009*