# i need the exat percentage of nitrogen in magnesium nitride

6,962 results, page 38-
## American Gov't

Do federal grants represent an appropriate percentage of the total federal budget and gross domestic product (GDP)? Explain, providing at least one (1) supporting fact. -
## math

Explain why each survey question might lead to an erroneous conclusion 20. In a recent article, the author states that 71% of adults do not use sunscreen. Although 71% is a large percentage, explain why it could be misleading. -
## math

a man buys an item from delhi 10% cheaper than that at merath, incurs loss of rs. 160, but on selling the item profits rs.240. calculate the profit percentage. -
## math 101

assume that a set of test scores is normally distributes with a mean of 120 and a standard deviation of 25. use the 68-95-99.7 rule to find the percentage of scores greater tha 145 -
## physics

how much would you have to raise the temperature of a copper wire(originally at 20degree celcius) to increase its resistance by 15%? express your answer in percentage.note a=0.0068per degree celcius -
## Math

A spherical balloon expands when it is taken from the cold outdoors into a warm house. If the surface area increases by 50% (factor of 1.50), by what percentage does the radius of the balloon change? a)7.7% b)50% c)100% d)75% e)22% -
## Chemistry

H3C6H5O7(aq) + 3 NaHCO3(aq) ¨ Na3C6H5O7(aq) + 3 H2O(l) + 3 CO2(g) How do you go about calculating theoretical yield of carbon dioxide from 1.00g of sodium bicarbonate andthe percentage yield -
## MATHS

please help me ...Experiments show that radium at rate proportional to the amount of radium present at the moment . if half life is 1590 years what percentage will disappear in one year ?? -
## Math

Christopher mixes the letters s, e, l, e, c, t, e, and d thoroughly. without looking, allen draws one letter. expressed as a fraction, decimal, and percentage, what is the probability that allen will not select a consonant? A. 3/8 , 0.375, 37.5% B. 3/5 , -
## chemistry

List the following bonds in order of increasing ionic character. (Enter your answer in the format H-O for the hydrogen-to-oxygen bond in H2O. Use the appropriate <, =, or > symbol to separate substances in the list.) the barium-to-fluorine bond in -
## chemistry

A chemist wishes to determine the rate of reaction of zinc with hydrochloric acid. The equation for the reaction is: Zn(s) + 2HCl(aq) ---> H2(g) + ZnCl2(aq) A piece of zinc is dropped into 1.00 L of 0.100 M HCl and the following data were obtained: -
## Chemistry

My teacher hasn't really talked about types of reactions; he's just given us a list of net ionic equations involving water and different elements including Lithium, Sodium, Calcium, Magnesium, Lanthanum, and Potassium to memorize. However, his test -
## chemistry.

1.A student is asked to measure the time taken for 4.00g of magnesium carbonate to react completely with 25.0 cm3 of dilute hydrochloric acid. Which pieces of apparatus does the student need? A: Balance, clock, pipette B: Balance, clock, thermometer C: -
## chem

Ammonia reacts with oxygen to form nitrogen dioxide and water according to the following equation: 4NH3(g) + 7O2(g) ® 4NO2(g) + 6H2O(g) You react ammonia and oxygen, and at the end of the experiment you find that you produced 27.0 g of water, and have -
## Science

the active ingredient in the alergy medication claritin contain carbon,hydrogen,chloride,nitrogen,and oxygen its molecules formula is C22H23ClN2O2.the standard adult gosage utizies 1.572*10^19 molecules of the spicies determine the mass gosage of the -
## Chemistry

The iodide ion can be oxidized in an acidic solution by hydrogen peroxide. One proposed mechanism for the reaction is as follows: Step 1: H2O2 (aq) + I-(aq) → H2O (l) + OI-(aq) slow Step 2: H+(aq) + OI-(aq) → HOI(aq) fast Step 3: HOI (aq) + -
## Chemistry

A 5.00-L flask contains nitrogen gas at 25°C and 1.00 atm pressure. What is the final pressure in the flask if an additional 2.00 g of N2 gas is added to the flask and the flask cooled to -55°C? -
## Ecosystems

what r 2 major ways in which nitrogen is fixed in ecosystems? i don't get what they mean by "major" ways? also wikipedia uses difficult wordings i don't understand. -
## physics please please please help me!

A neutral nitrogen atom has 7 electrons, 7 protons, and 7 neutrons. What is its total charge? If we remove 2 of the electrons, now what is its charge? what is its charge if we add 2 electrons to the neutrol atom instead? give charge in Coloumbs. -
## Math

The tornadoes have won 75% of their games. If they their next 4 games, their win percentage goes up to 80%. How many games have they played right now? (Please explain how to solve this problem) -
## math

the area of the circle was measured to be 29/30 of it original area.find the percentage error made in measuring area. -
## Math equation

I've won 556 games and tied 4 games and lost 228 games what is my percentage of wins -
## chemistry help !!!!!!!!!!!!!!!!

a)A N6+ ion in its ground state absorbs an X-ray photon of energy 2.0000 keV. Explain what happens to the ion and why. b)Explain why the nitrogen ion N6+ is a hydrogen-like ion. Assuming the ion is for the major stable isotope 14N, state which sub-atomic -
## Chem help

Which reaction of ammonia does not involve the non-bonding pair of electrons on the nitrogen atom? A NH3(g) + CH3I(g) → CH3NH 3+ I –(s) B NH3(g) + HCl (g) → NH4Cl (s) C 2NH3(l) + 2Na(s) → 2NaNH2(s) + H2(g) D 2NH3(aq) + Ag+(aq) → -
## Science

Which electrons in an atom take the most energy, and what are they called? What Kind of diagram is used to show how many of these electrons an atom has? What name is given to the elements with eight outer electrons? Which element belongs to this group, -
## Chemistry

Heating 1.0 mole of ammonia and 1.0 mole of molecular nitrogen at 723k in a 10L flask,the following equilibrium is observed: N2(g)+3H2(g)=2NH3(g) when the equilibrium is reached ,0.40 moles of molecular hydrogen are present in the flask,determine Kp and Kc -
## percentage problem

Over the course of ten years the price of an item increased 300%. The new price is what percent of the old price? -
## Chemistry

What's the difference between relative and percentage abundance? What's the difference between realtive and average atomic mass? Is there a difference? -
## chemistry 20

A student mixed a solution of aqueous calcium chloride with an aqueous solution of magnesium sulphate. A precipitate formed. 1) Write the balance chemical equation for the reaction including states of matter. Ensure you write the reactants as a dissociated -
## Math

The basketball team has won 21 games and lost 15 games . How many future games can they lose and keep their winning percentage above 0.500? -
## math

the price of tickets were reduced to 20%. the total number of sales of tickets increased by 60%. find the percentage increase of tickets. -
## math

the inteterst rate on an auto loan im may was 12 3/8%. by september the rate was up to 14 1/4%. how many percentage points did the interest rate increase over the period? -
## Chemistry

Bromine has two isotopes, Br- 79 and Br- 81. The relative atomic mass of bromine is 79.9. CALCULATE THE PERCENTAGE of Br-79 atoms in a sample of bromine. PLease help i'm really stuck -
## math

The average summer temperature in Anchorage is 69°F. If the daily temperature is normally distributed with a standard deviation of 7°F, what percentage of the time would the temperature be between 55°F and 76°F? -
## economics

Wilpen Company, a price- setting firm, produces nearly 80 percent of all tennis balls purchased in the United States. Wilpen estimates the U. S. demand for its tennis balls by using the following linear specification: where Q is the number of cans of -
## chemistry

1. Nitrogen gas and sodium liquid are produced by the decomposition of sodium azide NaN3 (s). what volume of nitrogen gas, measured at 25 C and 0.980 atm, is produced by the decomposition of 62.5 g of sodium azide? 2. A gas sample in a container with a -
## Chemistry

Hi, I was given the reactants for the chemical reaction and I am supposed to write the product. The equation must be balanced. Can someboy please check my work? Thanks :-) 3NaOH + Fe(NO3)3 --> Fe(OH)3 + 3Na(NO3) 2NH3 --> N2 + 3H2 2H2 + o2 --> 2H2O -
## chemistry

Triple Point Clicker Challenge The Lewis structure for nitroglycerin is shown below. 1.00 mL of liquid nitroglycerin is placed in a sealed, reinforced, insulated steel box measuring 1.00 m on each side and filled with argon gas at 15.0 oC and 1.00 atm. The -
## physics

The length l of a simple pendulum is about 0.5m, and can be measured within 1mm. what accuracy is required in the measurement of periodic time T of 100 oscillations if the error in l and T are to produce equal percentage in the calculation of acceleration -
## Military History

Two questions: 1. By 1864, only two Confederate ports remained open and actively participating in blockage running. One of these was: Mobile Charleston Savannah Boston 2. What percentage of Union army enlistments came from the draft? 9 13 15 10 -
## Calculus

The percentage of research articles in a prominent journal written by researchers in the United States can be modeled by A(t) = 25 + (36/1 + 0.6(0.7)^−t'), where t is time in years (t = 0 represents 1983). Numerically estimate lim as -
## ECONOMICS

1) If the price of a product produced in a competitive market increases, which of the following is most likely to occur in the labor market for workers who produce the product? A) the demand for labor and the number of workers hired both increase B) the -
## ECONOMICS

PLEASE HELP ME WITH THESE!!!!!!!! 1) If the price of a product produced in a competitive market increases, which of the following is most likely to occur in the labor market for workers who produce the product? A) the demand for labor and the number of -
## Graduation

Is graduation transition a graduation requirement for which a student receives four credits but not a formal percentage? -
## university of johannesburg

if sample(aluminium ammonium sulphate contains 6%aluminium) what is the approximate percentage of aluminium? -
## Science

1. The combination of sulfur dioxide, nitrogen oxide, and atmospheric moisture creates A. drinking water. B. smog. C. pesticides. D. acid rain. D? 2. Another name for unicellular organisms that dominated Earth up to the Precambrian time is A. eukaryotes. -
## Chemistry

Balanced Chemical Equation: 1 N204(l) + 2 N2H4(l) --> 3 N2(g) + 4 H20(g) If you start with: 5.0 x 10^4g hydrazine (N2H4) "in the tank": 1) How many moles of nitrogen can be created (assuming 100% yielded)? 2) How many moles of water can be produced? 3) -
## Chemistry

Balanced Chemical Equation: 1 N204(l) + 2 N2H4(l) --> 3 N2(g) + 4 H20(g) If you start with: 5.0 x 10^4g hydrazine (N2H4) "in the tank": 1) How many moles of nitrogen can be created (assuming 100% yielded)? 2) How many moles of water can be produced? 3) -
## Earth's Dynamic Atmosphere

The Sun heats the Earth. The Earth then reradiates this heat energy back into space. However, the amount of _______ in the air plays a key role in absorbing much of this exiting heat and warming Earth's atmosphere. A. carbon dioxide B. nitrogen C. oxygen -
## Chemistry

A compound contains 'N' and 'O' atom. The ratio of mass percentage of 'N' and 'O' is 7:16. If the vapour density of compound is 46, then find the no of 'O' atoms present per molecule of the compound. -
## math

show me how to calculate percentage return on the security if the payoff to the security in one year is $1000 and the security costs is $1500 today? -
## Chemistry

Prepare M/20 oxalic acid solution.Using this solution, find molarity, strength, and percentage purity of the sodium hydroxide solution. -
## math

Your office manager used 45 paperclips for handouts at his presentation from the 450 paperclips available in the stock room. What percentage of the original number of paperclips did NOT get used? -
## math

Your office manager used 45 paperclips for handouts at his presentation from the 450 paperclips available in the stock room. What percentage of the original number of paperclips did NOT get used? -
## AP Chemistry

Textrodotoxin is a toxic chemical found in fugu pufferish, a popular but rare delicacy in Japan. The compound has a LD50 (the amount of substance that is lethal to 50% of a population of iron (iii) hydroxide. Textrodotoxin is 41.38% carbon by mass, 13.16% -
## Chemistry

NaN3 is used in some automobile air bags. The impact of a collision triggers the decomposition of NaN3 as follows: 2NaN3(s) to 2Na(s) + 3N2(g). The nitrogen gas produced quickly inflates the air bag between the driver and the windshield. Calculate the -
## Chemistry

A sample of nitrogen containing 1.5x10^23 molecules has the same number of molecules as a sample containing A. 1.0 mole of H2 B. 2.0 moles of He C. 0.25 mole of O2 D. 0.50 mole of Ne -
## Chemistry

A sample of nitrogen containing 1.5x10^23 molecules has the same number of molecules as a sample containing A. 1.0 mole of H2 B. 2.0 moles of He C. 0.25 mole of O2 D. 0.50 mole of Ne -
## CHEM HELP

what is the theoretical mole ratio- NaCl to NaHCO3 How do you determine the percentage error of an experimental mole ratio It would be easier for us to help you if we had the entire problem instead of just parts of it. However, from the standpoint of Na, -
## Computers

I am supposed to type out a report, but our Microsoft Office Word program is messed up somehow. I have the letters set to Times New Roman size 8... but they're HUGE!!!!!!!! So big I can only fit about 5 sentences on a page. Also, at the end of every line, -
## Math Personal Finance

What is the present value of an investment that will be worth $2000 at the end of five years? Assume an APR (Annual Percentage Rate) of 6% compounded monthly. The present value is $_____ . -
## chemistry

What is the percentage yield of the reaction of 4.9 g isoamyl alcohol with 4.9 g of acetic acid if 3.5 g of isoamyl acetate product is obtained after distillation? Enter your answer, without a % symbol, to 2 sig. figs. -
## Chemistry 102

The average human body contains 6.00 L of blood with a Fe2+ concentration of 2.00×10−5 M . If a person ingests 6.00 mL of 16.0 mM NaCN, what percentage of iron(II) in the blood would be sequestered by the cyanide ion? -
## Math Personal Finance

Assume an investment of $7000 earns an APR (Annual Percentage Rate) of 6% compounded monthly for 18 months. The money in your account after 18 months will be $______. -
## Math-Algebra 1

The price of a gallon of unleaded gas has dropped to $2.80 today. Yesterday's price was $2.87 . Find the percentage decrease. Round your answer to the nearest tenth of a percent. -
## math

Suppose X is a random variable with mean μ and standard deviation σ. If a large number of trials is observed, at least what percentage of these values is expected to lie between μ − 3σ and μ + 3σ? (Round your answer to the nearest whole number.) -
## College Stats

the average purchase per customer is 42 with a standard deviation of 4.36. using Chebysevs theorem what percentage of people will make a purchase between 54 and 30 I got 94.7 percent but i am unsure if its the correct answer can anyone verify this for me -
## statistics

You measure 64 children , obtaining a X of 57.28 . The mean is 56 and sd is 8 Slug says that bc this X is so close to the mean of 56 , this sample could hardly be considered gifted. A. Perform the appropriate statistical procedure to determine whether he -
## statistics

A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 4% margin of error at a 99% confidence level, what size of sample is needed? -
## profit&loss mathematics

A sells to B at a gain of 20%,B sells to C at a price A paid.what does B lose as a percentage? Plz show step with neat algebras i tried working it out i become angry with the question -
## math

A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 8% margin of error at a 95% confidence level, what size of sample is needed? -
## Biology

1. Given the following concordance rates, is the identified trait primarily genetic or environmental? Explain. MZ Twins DZ Twins Height 0.94 0.44 Measles 0.95 0.87 Migraine headaches 0.80 0.39 Body fat percentage 0.73 0.22 -
## Statistics

Carrie attained a score of 650 on the verbal section of her SAT. The mean grade was a 500 with a standard deviation of 100. What percentage of test takers scored below and above Carrie? -
## MATHS

experiments show that radium disintegrates at a rate proportional to the amount of radium present at the moment . if half life is 1590 years what percentage will disappear in one year? -
## chemistry

A 1.500-g sample of a mixture containing only Cu2O and CuO was treated with hydrogen to prduce 1.252 g pure copper metal. Calculate the percentage composition (by mass) of the mixture. -
## math

1. Tammy mixes the letters S, C, H, O, O, and L thoroughly. Without looking, Allen draws one letter. Expressed as a fraction, decimal, and percentage, what is the probability that Allen will not select a consonant. 5/6, 0.833, 83.3% 2/3, 0.667, 66.7% 1/3, -
## statistics

You measure 64 children, obtaining a X of 57.28. Slug says that bc this X is so close to the mean of 56, this sample could hardly be considered gifted . A. Perform the appropriate statical procedure to determine whether he is correct. B. In what percentage -
## math

Jphn just purchased a plasma t.v. for his living room. He paid $12,00 for a 46-inch television. The regular price of the television was $1,500. What percentage did John save during the sale? I got 20% but I wanted to see if I was right or not. -
## government and politic

the percentage of people between the ages of eighteen and twenty who are registered to vote has dropped much more than that of people aged sixty-five and over. Does this indicate that voting turnout will continue to decline in the future? -
## Chemistry

Urea (NH2CONH2), an important nitrogen fertilizer, is produced industrially by the reaction 2NH3(g)+ CO2(g)--> NH2CONH2(aq)+ H2O(l). Given that delta G = -13.6 kj/mol, calculate delta G at 25 degree C.for the following condition. 40 atm NH3 , 40 atm CO2 -
## chem 1p1

An automobile tire at 22oC with an internal volume of 20.0L is filled with air to a total pressure of 30. psi(pounds per square inch). [1 atm = 14.696 lb/in2]. What is the amount in moles of air in the tire? If the air is mostly nitrogen, how many grams of -
## science

Write down five atoms that you've interacted with today. It will depend on what you have done today. For me (and you will have your own set) Aluminium (in the drinks can) Potassium-40 (it was in the banana I had for breakfast) Carbon (in the plastic in -
## Chemistry

Nitrogen monoxide reacts with chlorine gas according to the reaction: 2NO (g) + Cl2 (g) â‡” 2NOCl (g) Kp = 0.27 at 700 K A reaction mixture initially contains equal partial pressures of NO and Cl2 . At equilibrium, the partial pressure of NOCl is 115 -
## Ela

All of the following sentences are complex EXCEPT A) Even though acid rain can have damaging effects, few people know much about it. B) Acid rain has been studied as an environmental issue by the government since the 1970s. C) Since they erode statues and -
## Chemistry

A compound contains only carbon, hydrogen, nitrogen, and oxygen. Combustion of 0.157 of the compound produced 0.213g CO2 and 0.0310 g H20. In another experiment, it is found that 0.103g of the compound produces 0.0230 g NH3. What is the empirical formula -
## Math

2/5=what I assume you are looking for a decimal. Just divide 5 into 2, and the answer will be the decimal. However, if you are looking for a percentage, multiply the decimal by 100. I hope this helps. If not, repost with a clearer question. Thanks for -
## Maths

A person stands in front of a cylindrical water tank and has a viewing angle of 27 degrees to the sides of the tank. What percentage of the circumference of the tank can they see? -
## statistics

the manager of a football team works for 310 days per year. of this he spends 42 days looking at new player he might buy. what percentage of his working days is this? -
## percentage

Madhu's income is RS 12000 per month . She pays 20% tax on monthly income above Rs 2000 and she spends 30% of the remaining income. How much does she save annually -
## Chemistry

9.3mL of ammonia base cleaner requires 12mL of 1M HCL to reach end point. A) what is molarity of ammonia and b) what is percentage of ammonia -
## science

during which phase is the least percentage of the light that hits the moon visible from earth? a) new moon b) waxing gibbous c) waning crescent d) full moon -
## Chemistry - Solubility

1.a) What did you observe upon the addition of NH3 (aq) to the magnesium chloride solution? Explain using relevant chemical reactions. I observed a colorless liquid. (Not sure how to explain) b) What happens when NH4Cl was added? Explain observation with -
## Chemistry

Help required- Urea, CO(NH2)2, is the excreted form of excess nitrogen in most vertebrates. In urinary infections, urease, released by microbial pathogens, degrades urea into CO2 and ammonia in the bladder. a) write a balanced equation of the reaction, b) -
## AP Macroeconomics

1. As an example of a price index, consider the A.C.D.P.I. (a fictitious price index). The associated basket of goods is: Good Quantity Price Coffee 3 lb $8/lb Bread 3 loaves $1/loaf Tea 1 lb $15/lb Aspirin 1 200-tablet bottle $2/bottle Cola 1 case $6/case -
## Chemistry

This Chem problem is really difficult -Need help please! Magnesium Consists of three naturally occuring isotopes. The percent abundance of these isotopes is as follows: 24Mg(78.70%), 25Mg(10.13%) and 26Mg(11.7%). The average atomic mass of the three -
## chemistry

The gase in a mixture have the following partial pressures at the same volume and temperature, 1013000Pa nitrogen, 700mm argon, 1.20atm helium, 790 torr oxygen, and 0.50 atm of carbon dioxide. What is the total pressure of tyhe mixture in atm? You add -
## Chemistry Balancing Equations

Can you please tell me if these are correct? 1. Sodium Hydrogen Sulfite reacts with hydrochloric acid to produce sulfur dioxide gas, water and sodium chloride NaHSO3 + HCl -----> SO2 + H2O + NaCl 2. Sodium nitrate reacts with hydrochloric acid to -
## Chemistry

a tank contains a mixture of 3.0 mol of nitrogen gas, 2.0 mol of oxygen gas and 1.0 of carbon dioxide gas at 25 degrees celsius and a total pressure of 10.0 atm. Calculate the partial pressure in torr of each gas in the mixture? -
## Chemistry

Which one of the following compounds does not follow the octet rule? a) NF3 b) CF4 c) SF4 d) PH3 e) HCl I know I can eliminate A and B because nitrogen and carbon follow the octet rule. I know I can eliminate E because the total amount of valence electrons -
## General Chemistry

Answer Check Please... A compund contains only hydrogen and nitrogen and is 12.6% hydrogen by mass. A gaseous sample of the compound has desity of 0.925g/L at 690 torr and 110 degrees Celsius. What is the molecular formula of the compound? My Empirical