126 Answered Questions for the topic Moles

02/08/17

#### How many moles in 31.0 g of chlorine? (Remember chlorine is diatomic) – Show Work

How many moles in 31.0 g of chlorine? (Remember chlorine is diatomic) – Show Work

02/08/17

#### How many moles in 34.2 g of sulfur? – Show Work

How many moles in 34.2 g of sulfur? – Show Work

Moles Chemistry

11/13/16

#### How many moles of methane gas CH4 are in a 1.00*10^5L storage tank at STP? How many grams of methane is this? How many grams CO2 gas could the same tank hol

I am needing help answering chemistry homework

#### What is the amount in moles of nitrogen gas found in a 58.0 L compressed gas tank that has a pressure of 89.3 atm at 357 K? - Show Work

What is the amount in moles of nitrogen gas found in a 58.0 L compressed gas tank that has a pressure of 89.3 atm at 357 K?

#### Use the combined gas law or ideal gas equation please

How many moles of gas are in a 30.0 liter scuba canister if the temperature of the canister is 300 K and the pressure is 200.0 atmosphere? - Show Work

#### Use the combined gas law or ideal gas equation please

It is not safe to put aerosol containers in a campfire because the pressure inside gets very high and they can explode. If a 1.00 liter canister holds 2.00 moles of gas and the temperature of the...
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#### Use the combined gas law or ideal gas equation please

If I have a 50.0 liter container that holds 45 moles of gas at a temperature of 200 degrees Celcius, what is the pressure inside the container? - Show Work.

#### Solve problem using the combined gas law or the ideal gas law. - Show work

How many moles of gas does it take to occupy 120.0 liters at a pressure of 2.30 atmospheres and a temperature of 340. Kelvin? - Show Work

#### Mole fraction?

What is the mole fraction of NaOH in an aqueous solution that contains 15% NaOH (weight/weight%)?

#### Mole fraction problem?

If the mole fraction of K2SO3 in an aqueous solution is .0328, what is the weight/weight % (percent by mass) of K2SO3?

Moles Chemistry

06/08/16

#### Mole fractions?

What is the mole fraction of LiF in an aqueous solution that contains 39.4% LiF (weight/weight %)?

04/07/16

#### How many moles of iron are needed to form 8 moles of iron lll oxide? With 4 Fe + 3 O2 = 2 Fe2O3

i really just don't understand how to do these problems :/

03/16/16

#### How do I work out the molarity and equilibrium constant using moles of reactants?

The equation is C2H5OH(aq) + CH3CO2H(aq) ? CH3CO2C2H5(aq) + H2O(l)
Moles of ethanol: 0.0747
Moles of ethanoic acid: 0.0112
amount of ethanol used in experiment: 4cm3
amount of ethanoic...
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03/05/16

#### If I wanted to dilute a 6.2 L, 3M NaNO3 solution to make a 4.7M NaNO3 solution....

How many L of NaNO3 would I need to add?

Moles Chemistry

03/04/16

#### A 0.25mol sample of a certain substance has a mass of 10g, what is the molar mass of this substance? Which element has the same molar mass?

A 0.25mol sample of a certain substance has a mass of 10g, what is the molar mass of this substance? Which element has the same molar mass?

#### how many grams of sugar would you need to have the same number of particles as 5.0 grams of salt?

I'm having a hard time with my chemistry lab, please help!

10/06/15

#### According to the following reaction, how many moles of hydrogen gas will be formed upon the complete reaction of 0.235 moles hydrobromic acid? hydrobromic acid

According to the following reaction, how many moles of hydrogen gas will be formed upon the complete reaction of 0.235 moles hydrobromic acid?hydrobromic acid (aq) hydrogen (g) + bromine (l)

09/23/15

#### The molar mass of aspirin is 180.16 g/mol. What is the theoretical yield in grams, for the aspirin she theoretically obtained above using 4.02 g of SA?

The molar mass of aspirin is 180.16 g/mol. What is the theoretical yield in grams, for the aspirin she theoretically obtained above using 4.02 g of SA? What is the percent yield?

09/23/15

#### The molar mass of salicylic acid (SA) is 138.12 g/mol. How many theoretical mols are there in the 4.02 g of the SA reactant the student started the reaction wit

The molar mass of salicylic acid (SA) is 138.12 g/mol. How many theoretical mols are there in the 4.02 g of the SA reactant the student started the reaction with?

05/17/15

#### How many miles of P4 are needed to produce 10.5L at STP

The balanced equation is
8P4 + 3S8 ---> 8P4S3

04/25/15

#### Finding concentration!

Please help if you're able. I really don't understand this at all.
A student has a flask containing nitric acid (HNO3 (aq)). She is not sure what the concentration of this acidic solution is...
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04/21/15

#### Gas Laws and stoichiometry

Assume that 18.4 g of Al react with HCl according to the equation Al(s) + HCl(aq) −→ AlCl3(aq) + H2(g) at STP. How many moles of Al react? Remember to balance the equation first. Answer in units of...
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Moles Chemistry

04/14/15

#### How many moles of silver chloride are required to make a 1.0M solution of silver chloride in a 100mL volumetric flask?

I have no clue what I am doing please help me

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