Saturday

April 19, 2014

April 19, 2014

Total # Posts: 242

**Chemistry**

Help please: A 0.199-g sample of unknown metal (X) reacts with hydrochloric acid to produce 88.5 mL of "wet" gas at 20 °C and 754 mm Hg. What is the unknown metal (X)? (The vapor pressure of water at 20 °C is 18 mm Hg.) X(s) + 2 HCl(aq) → XCl2(aq) + H2(...

**Chemistry**

How many nonbonding electron pairs are in an oxygen molecule? I drew it but im unsure if Im correct in saying it has 2 nonbonding electron pairs.

**Chemistry**

corrections for the data 1.00 atm 150 mL 1.15 atm 130 mL 1.36 atm 110 mL 1.67 atm 90 mL 2.14 atm 70 mL 3.00 atm 50 mL

**Chemistry**

How would I graph this: (I dont understand the whole with [1/volume] (units=1/mL) on the X-axis ) According to Boyle's Law, pressure is inversely proportional to volume, so prepare a graph of the data, with [1/volume] (units=1/mL) on the X-axis and pressure (atm) on the Y-...

**chemistry**

A sample of hydrogen chloride gas occupies 0.550L at STP. What is the pressure in atm if the volume is 7.50×10−2L at 20∘C?

**Science Help PLEASE!!**

I only need #1 now. . .

**Science Help PLEASE!!**

1. What happens to the levels of surface water and groundwater during a drought? Surface water and groundwater levels increase during drought. Surface water and groundwater levels decrease during drought. There is no change in the levels of surface water and groundwater during...

**science**

Carbon dioxide is obtained from the air and changed into carbohydrates and oxygen during the process of A) fossilization. B) respiration. C) digestion. D) photosynthesis

**History**

How did issues regarding African Americans equality shaped US 1850-1920?

**Rounding**

37,400?

**Rounding**

Would the answer be 37,000 then? I under stand the concept with small numbers, but the big number is confusing me.

**Rounding**

I was doing a math question and I got the answer "$37,482.43" but the question says to round to the nearest dollar. What would the answer be then?

**world history**

Which of the following is not something Napoleon did to help France wage war and win territory? A. He relied on the mandatory military service of French citizen-soldiers. B. He improved schools and the postal service. C. He raised soldiers from conquered territories. D. He ins...

**world history**

Which of the following is not something Napoleon did to help France wage war and win territory? A. He relied on the mandatory military service of French citizen-soldiers. B. He improved schools and the postal service. C. He raised soldiers from conquered territories. D. He ins...

**world history**

Which of the following is not something Napoleon did to help France wage war and win territory? A. He relied on the mandatory military service of French citizen-soldiers. B. He improved schools and the postal service. C. He raised soldiers from conquered territories. D. He ins...

**English**

'Self-portrait'. Describe yourself. In your description you should try to capture what makes you unique. Write about 350-500 words.

**Math**

S(t) = 0.05t^3 + 0.3t^2 + 2t + 8 Find S'(t)

**Accounting - Writing **

UOIT has recently appointed you to prepare an independent consulting report to analyze the university’s current financial position and to provide some recommendations for improvement. Before you begin your analysis, you decide to identify UOIT’s various stakeholders....

**ap chem**

If 26.0mL of AgNO 3 is needed to precipitate all the Cl −ions in a 0.750-mg sample of KCl (forming AgCl), what is the molarity of the AgNO 3 solution

**ap chem**

What volume of 0.140 M HCl is needed to neutralize 2.53g of Mg(OH)

**Math**

What is the inequality sign for the word about? For example, Sally had about 10 apples.

**Math**

An investment broker wants to invest up to $20,000. She can purchase a type A bond yielding a 10% return on the amount invested, and she can purchase a type B bond yielding a 15% return on the amount invested. She wants to invest at least as much in the type A bond as in the t...

**Math**

A factory manufactures two products, each requiring the use of three machines. The first machine can be used at most 70 hours; the second machine at most 40 hours; and the third machine at most 90 hours. The first product requires 2 hours on machine 1, 1 hour on machine 2, and...

**Math**

The equation I would use is C = 12a + 16b. Does that seem alright? And how would I form the contraints?

**Math**

An appliance company has a warehouse and two terminals. To minimize shipping costs, the manager must decide how many appliances should be shipped to each terminal. There is a total supply of 1200 units in the warehouse and a demand for 400 units in terminal A and 500 units in ...

**Math - Functions**

Is max profit 80 than? I am plugging it back into P(x) = = 50x - 1.25x^2 - 160 - 10x right?

**Math - Functions**

The research department in a company that manufactures AM/FM clock radios established the following cost, and revenue functions: R(x) = x(50-1.25x) C(x) = 160 + 10x where 0 < x < 20. a) Determine when R = C (to the nearest thousand units. e.g. 6.247) Quantity x = _______...

**Math**

By the way, "blank" is where the answer is supposed to be.

**Math**

The research department in a company that manufactures AM/FM clock radios established the following cost, and revenue functions: R(x) = x(50-1.25x) C(x) = 160 + 10x where 0 < x < 20. a) Determine when R = C (to the nearest thousand units. e.g. 6.247) Quantity x = Blank 1...

**Math/Piecewise functions**

Thank you! Is there a way you could show me what the graph looks like? Or explain the lines/end axis points?

**Math/Piecewise functions**

and the 2nd one would be 450+0.0585(x-15,000) which I would simplify. I still need help on the last one!

**Math/Piecewise functions **

Write a piecewise definition for the tax due T(x) on an income of x dollars When x <= $15,000..... 3% of taxable income When $15,000 < x <= $30,000....... $450 plus 5.85% of excess over $15,000 When x > $30,000........ $1327.50 plus 6.8% of excess over $30,000 I kn...

**Math - Compounding**

Find the value of $15,000 at the end of one year if it is invested in an account that has an interest rate of 4.50% and is compounded: a) monthly b) daily (assuming a 365-day year) c) quarterly What is the formula that should be used for these 3? I just need help getting started.

**physics**

An oceanic depth-sounding vessel surveys the ocean bottom with ultrasonic waves that travel 1530 m/s in seawater. How deep is the water directly below the vessel if the time delay of the echo to the ocean ﬂoor and back is 8 s? Answer in units of m 004 1.0 points Joe Go ...

**Science :check my answers**

Here are some questions I had for hw, I answered some of them, can someone check my answers and help me with the ones i didn't answer, thanks: 1.Which constellations are visible from Canada in all seasons? My Answer:Ursa Major, Ursa Minor, Lynx,Cephus, Cassiopia, Camelopar...

**math**

anita earned $475.54 in 2 weeks have earned the same amount of money each hour that she worked if anita worked a total of 62 hours during those 2 weeks about how much did she earn each hour?

**Chemistry**

A sample of calcium carbonate that has a mass of 1.0 g is heated and completely decomposed-calculate. a) the mass of carbon dioxide produced b)the volume of carbon dioxide at SLC c)the volume of carbon dioxide at STP

**Life Orientation**

Critically discuss 8 ways in which hiv/aids impact within a community in South Africa

**Math**

The legs of an isosceles triangle measures 2x^4+2x-1 units. The perimeter of the triangle is 5x^4-2x^3+x-3 units. Write a polynomial that represents the measure of the base of the triangle.

**Math**

The legs of an isosceles triangle measures 2x^4+2x-1 units. The perimeter of the triangle is 5x^4-2x^3+x-3 units. Write a polynomial that represents the measure of the base of the triangle.

**chemistry**

What volume of oxygen would be required for the complete combustion of 23.4g of benzene, C6PO4?

**PRECALC**

6∑6(2^K-1) K=1

**geometry**

A tower casts a shadow of 64 feet. A 6 foot tall pole near the tower casts a shadow 8 feet long. How tall is the tower?

**Math**

Mary sells roses for $24.98 a bunch. At the end of the day she had collected $274.78. How many bunches of roses did she sell?

**Anatomy**

why is enzymatic catalysis essential for life? Describe in detail the mechanism for enzyme mediated anabolic and catabolic reactions. include in your answer various modes of inhibition.

**Math **

Huong reduced the size of a rectangle to a width of 1 inch. What is the new height if it was originally 18 inches tall and 6 inches wide?

**enc1101**

Correcting run-on sentences 1. I had the opening part, I remember it like it was yesterday ”good afternoon everyone and welcome to the productions of ”What's the Meaning of Life”.” 2. I looked down at my costume and I love my little tutu my mom said it ...

**Science**

What are thease layers of earth made of? Crust Lower mantel outer core inner Core. and asthenospher and lithosphere

**pharmacy informatics**

can you give me some articles?Just like this article entitled "The Right Amount of Exercise for Improved Mental Health".

**pharmacy informatics**

Can you please give me an article about medicine that have 3 pages?

**Math**

In a geometric sequence, the fourth term is -4, and the eighth term is -324. What is the tenth term?

**pharmaceutical chemistry**

when is a substance classified as pharmaceutical aid or necessity?PLEASE HELP ME :)THANKS A LOT.

**math**

That is not right the answere is 5

**math**

I am a fraction with a deminator of 4. I am greater than1/2 but less than 1. What fraction am i?

**Math**

The cake perimeter is 72 inches. The length is 2 times the width, what is the area of the cake?

**Calculus**

Im finding local Min and max of x^2/x-2 I know I take the derivative of the first one but how do i derive this one. And the second one especially don't know how to do.

**algebra**

Solve the equation for y. Then graph the equation. 5x – 4y = 12 A.y=-5/4x-3 B.y=4/5x+3 C.y=5/4x-4 D.y=-4/5x+3

**Physical Science**

8 letter word for a substance that can be broken down into two or more simpler substances?

**logic**

Can u please give me 2 own examples of contrariety,subcontrariety,subalternation,and,contradiction?PLEASE.

**Science**

In what ways are there three processes similar in terms of the starting materials and end products?

**Chemistry help!!**

What is the p total?

**Chemistry help!!**

Mole percent composition of earths dry atmosphere is 78% N2, 21% O2 and 1.00% Ar. Using the atmospheric pressure you recorded in the lab during this experiment (757.5 mmHg) and an ambient temperature of 25C, calculate partial pressures of these 3 gases.

**Chemistry....help**

If 0.500L of dry N2 was bubbles into an inverted flask through water to saturate it at 25.0C, what would be the total volume at the lab atmospheric pressure. Our pressure was : 757.5 mmHg

**Alegebra**

N is the number of buttons in a sewing box. N is more than 40 but less than 80. When N is divided by 5 , the remainder is 2. When N is divided by 7, the remainder is 4. What is the value of N?

**Physics**

(a) What is the energy of a pendulum (L = 0.9 m, m = 0.4 kg) oscillating with an amplitude of 4.3 cm? (b) The pendulum's energy loss (due to damping) is replaced in a clock by allowing a 2.3-kg mass to drop 1.0 m in 1 week. What percentage of the pendulum's energy is l...

**Physics plz help**

(a) What is the energy of a pendulum (L = 0.9 m, m = 0.4 kg) oscillating with an amplitude of 4.3 cm? (b) The pendulum's energy loss (due to damping) is replaced in a clock by allowing a 2.3-kg mass to drop 1.0 m in 1 week. What percentage of the pendulum's energy is l...

**@ elena **

In the figure the coefficient of static friction between mass (MA) and the table is 0.40, whereas the coefficient of kinetic friction is 0.28 ? part a) What minimum value of (MA) will keep the system from starting to move? part b) What value of(MA) will keep the system moving ...

**physics **

In the figure the coefficient of static friction between mass (MA) and the table is 0.40, whereas the coefficient of kinetic friction is 0.28 ? part a) What minimum value of (MA) will keep the system from starting to move? part b) What value of(MA) will keep the system moving...

**physics please help !**

In the figure the coefficient of static friction between mass (MA) and the table is 0.40, whereas the coefficient of kinetic friction is 0.28 ? part a) What minimum value of (MA) will keep the system from starting to move? part b) What value of(MA) will keep the system moving ...

**physics please help !**

In the figure the coefficient of static friction between mass (MA) and the table is 0.40, whereas the coefficient of kinetic friction is 0.28 ? part a) What minimum value of (MA) will keep the system from starting to move? part b) What value of(MA) will keep the system moving ...

**physics**

In the figure the coefficient of static friction between mass (MA) and the table is 0.40, whereas the coefficient of kinetic friction is 0.28 ? part a) What minimum value of (MA) will keep the system from starting to move? part b) What value of(MA) will keep the system moving ...

**Health Science **

What is the pulse deficit if an apical pulse is 112 and the radial pulse is 88?

**@elena**

im still a bit confused, i still dont know the answer to the question

**college physics 44**

An unmarked police car traveling a constant 95km/h is passed by a speeder traveling 14km/h .Precisely 2.50s after the speeder passes, the police officer steps on the accelerator; if the police car's acceleration is 2.30m/s^2 , how much time passes before the police car ove...

**@elena**

sorry wrong post

**@elena**

thank you so much !

**math**

If the word,"if," in math mean multiply and,"is," means equal, what does the word,"was'" mean??? EX: Four times a number was 22 greater than twice the number.

**Chemistry Help Please!!**

We did an experiment and I don't really know how to calculate this question. If you could show me how to do one, then I could do the rest. INFORMATION: HCl = 0.1404 M We placed 0.5 g Ca(OH)2 in 100 mL of the following solutions: Flask A: Distilled Water (8.5 mL of HCl need...

**math**

Two standard numbers cubes are thrown. Given that one of the cubes shows a two, what is the probability that the sum of the numbers that come up on the two cubes is four?

**math**

In a clinical trial, a drug used to reduce blood pressure caused side effects in 6% of the patients who took it. For a new rial, two patients were selected at random. Find the probability that both the patients had side effects.

**algebra**

Diene claims that f(x)=3/x is its own undo rule. Is her conjecture correct?

**Science**

Why is there no real surface of the sun?

**7th Grade Math**

What's a percent of sales paid to a salesperson called?

**Physics**

At a velocity of 55m/s, the car slides off the track. What is the coefficient of friction between the car's tires and the track?

**math for elem. teacher**

Explain why the product of any two consecutive natural numbers is even.

**Math**

Please match each number with its best example. Some values will need to be changed into a decimal format. A. Recurring Decimal B. Mixed Number C. Non-repeating Decimal D. Finite Decimal E. Decimal Examples: ½ 5½ π 0.375 ⅓ I think 5½ is B and &#...

**Math-Decimals**

Please match each number with its best example. Some values will need to be changed into a decimal format. A. Recurring Decimal B. Mixed Number C. Non-repeating Decimal D. Finite Decimal E. Decimal Examples: ½ 5½ π 0.375 ⅓ I think 5½ is B and &#...

**math**

1)Which values of x are in the solution set y=3x-1 y=x^2-5x+6 2)6ab (radical8b)-3a radical(32b^3)+9ab (radical5b) 3) write in simplest form (2/x+4/y)/(4x/y-y/x) 4)solve for all values of x 8x^3+4x^2-18x-9 5)abs(4x+6)-4x=-10 6) simplify 4x^-5y7 /(3x^3y^-8)^-3

**algebra 2 trig**

express the product of (2/3x^2-1/2x) and (12x+4/5) as a trinomial

**Physics**

A spring force constant 210 N/m vibrates with an amplitude of 28.0 cm when .250 kg hangs from it. What is the equation describing this motion as a function of time? Assume that the mass passes through the equilibrium point with positive velocity at t=0. At what times will the ...

**math**

63

**history**

which writer satirized the narrow minded complacency and dullness of small town America, in their book main street? a. Hemingway. b. Fitzgernald. c. Elliot. or d. Lewis

**Math**

How do you simplify (8x^4/3y-3)^4

**science**

my name is ally and it's for science

**chemistry hw help please ASAP**

if 25.2 g of aluminum (AW=27.0) are mixed with 125 g of sulfuric acid(MM=98.1)then how many grams of aluminum sulfate will be produced? 2Al+ 3 H2SO4 --> 3H2 + Al2(SO4)3

**Geometry**

Please solve this problem. d=2*x/8

**pre-algebra**

1/9+x=5/6x-3/4

**English-Urgent**

THANK YOU:)

**English-Urgent**

8. What is an adjective clause? I know what an adjective is. have dreams that involve exploring the unknown and having something names after themselves. What involves? How is it not dreams? It must be unknown then, but why? Please let me know, thank you!!

**English-Urgent**

Again, thanks a lot. I'm really learning from you. If my reasoning is not correct , please let me know. Thanks. 8.Who have? Students have dreams so, subject is students. What involves? I still think dreams would be the subject. 9.who cares? People would be the subject then...