05/14/21

Chemistry:molarity;how many moles

How many moles are in a beaker containing 250 mL of a 0.50 M solution?
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05/13/21

Please help me ???
During a summer research internship, Cabrial is asked to do lab work and prepare solutions for experiments to be run on samples that will come in from the field. He needs to prepare a 0.500 M... more
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05/13/21

When a member chooses to “cross the aisle,” he or she is __________.
a. opting to run for reelection in the other house of Congress b. switching his or her party affiliation for future votes c. changing his or her party affiliation for future elections d. selecting... more
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05/13/21

Q; A game consists of rolling a die.
A game consists of rolling a die. If an even number shows, you receive double the value of the upper face in points. If an odd number shows, you lose points equivalent to triple the value of the... more
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05/13/21

Find an equation of the line described. Leave the solution in the form Ax + By = C. The line has slope m = − 4/5 and contains (0, 8).
Find an equation of the line described. Leave the solution in the form Ax + By = C. The line has slope m = − 4/5 and contains (0, 8). Can Someone just help me get the answer for this one, I have... more
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05/13/21

i have an exam tomorrow i want the answer so i can check if my answers are right

-Find the unit rate for number of parts manufactured per hour if 1363 parts are made in 5 hours. Round to the nearest integer.-Write an expression for the phrase: the quotient of 2 times a number... more
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05/13/21

Area of shaded sector
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05/13/21

How many molecules are in 10 moles of glucose(C6 H12 O6)?
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05/13/21

quantile information
Interpret the quantitative information in this balanced equation at the particle level, the mole level, and the mass level.  Show that the law of conservation of mass is obeyed. Zn(s) +... more
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05/13/21

The pressure a sample of hellum in 1.97 L container is What is the new pressure if the sample is placed in 1.97 L container
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05/13/21

Chemistry Question
The mass of a hydrogen atom (hydrogen-1) is 1.007825 amu; that of a tritium atom (hydrogen-3) is 3.01605 amu; and that of an α particle is 4.00150 amu. How much energy in kilojoules per mole of... more
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05/12/21

If there is a loss of 5.63 x 10-7kg of mass in a nuclear reaction, how many Joules of energy would be released? Recall that c = 3x108 m/s.
A. 3.92 x 104B. 3.92 x 1010C. 5.07 x 107D. 5.07 x 1010E. 6.26 x 10-24
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05/12/21

Calculate the pressure of a helium sample at -207.3°C and 768 mL if it exerts a pressure of 175 kPa at 25.0°C and 925 mL.
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05/12/21

The heat of solution for silver nitrate is 22.59 kJ/mol. What does this value mean?
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05/12/21

How do i solve this? no units needed
When a sample of 95.01 g NH4NO3 dissolves in 56.26 g of water, the temperature changes from 27.33 C to 7.85 C. Calculate the heat flow (Q) with respect to the water in calories. (write answer to... more
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05/11/21

On a hot day, you may have noticed a bag of potato chips seems to “inflate.” If I have a 250. mL bag at a temperature of 292 K, and I leave it in my car that reaches a temperature of 333 K
what will be the new volume of the bag of chips?show all work please!!
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05/11/21

What if: There were no gravity?
I'm having to write a 4 page paper on what would it be like without gravity. I wanted to know if there are anyways I can make this easy and move a little faster.
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05/11/21

What is the diagonal of a rectangle 100 meters long and 69 meters wide?
Screenshot 2021-05-11 162320.png (347×104) (1drv.com)
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05/11/21

I NEED HELP ASAP
which of the following Ksp is more likely to favor reactants?1) Colbalt (II) hydroxide Co(OH)2; Ksp 5.92x10^-15or2) lead(II)chloride PbCI2 , Ksp 1.70x10^-5
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05/10/21

help pls If the molar solubility of aluminum hydroxide, Al(OH)3 is 2.6 x 10-9 M, what is the solubility product, Ksp ?
If the molar solubility of aluminum hydroxide, Al(OH)3 is 2.6 x 10-9 M, what is the solubility product, Ksp ?
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05/10/21

Calculating Enthalpy in a Calorimeter Experiment- PLEASE HELP!
When 3g of Ammonium Chloride is added to 10ml of water in a calorimeter, the temperature over a five-minute period drops from 27.1 degrees celsius to 19.8 degrees celsius. The table of the results... more
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05/09/21

is it A or ????
Calculate the mass of carbon dioxide produced from 15.3 g of octane in the reaction below.2C8H18 + 25O2 → 16CO2 + 18H2Oa.53.1 g carbon dioxide b.0.737 g carbon dioxide c.47.2 g carbon dioxide d.94... more
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05/08/21

If 2.47 moles of calcium chloride reacts with fluorine gas, how many grams of calcium fluoride are made?
Need help with this question
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05/08/21

A deep underground cavern contains 2.24 x 106 L of methane gas at a pressure of 15.0 atm and a temperature of 42ºC. How many grams of methane does the natural gas deposit contain?
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05/08/21

A rigid steel cylinder with a volume of 20.0 L is filled with nitrogen gas to a final pressure of 200.0 atm at 27ºC. How many moles of nitrogen gas does the cylinder contain?
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