28 Answered Questions for the topic Molar Mass

10/03/19

#### Molar Mass help

What is the molar mass ofAcetic Anhydride Acetylsalicylic AcidAcetic AcidPlease show work

03/25/19

#### How many moles of KI are in 8.89×1024 formula units?

How many moles of KI are in 8.89×1024 are in formula units?

02/20/19

#### A gas sample is collected at 21 degrees celsius and 0.988 atm. If the sample has a mass of 4.7 g and a volume of 396 mL. What is the molar mass?

10th grade Chemistry gas law problem. Find the molar mass given the temperature and air pressure.

06/19/18

#### calculate the molar mass ( molecular weight) of a sample if a single molecule weighs 7.45 * 10^-23 g

is this even possible to determine if you don’t know what elements are in the molecule? probably so but i’m stumped! S.O.S.

05/22/18

#### An anti cavity mouthwash is 0.05% (w/v) sodium fluoride. What is the molarity of sodium fluoride in the mouthwash?

How many grams of sodium fluoride are there in 0.5 fluid ounces of the mouthwash?

02/14/18

#### how to find molar mass of an unknown compound

A solution is prepared with 3.85 g of an unknown compound in 100.0 g of cyclohexane. The solution had a freezing point of 4.18 degrees Celsius. what is the molar mass of the unknown compound?

01/30/18

#### Can someone help me with empirical formula and molar mass?

How do I find out the empirical formula of a molecule and how do I find the molecular formula?
Ex:
1. What's the empirical formula of a molecule containing 65.5% carbon, 5.5% hydrogen, and...
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12/04/17

#### Can someone help me with finding out the Molar Mass and Percentage Composition for compounds?

Here are two examples:
Mg₃P₂
&
Sr(OH)₂
I've been struggling with trying to find out the molar mass/percentage compositions for these questions but I just struggle to do so,...
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02/08/17

#### How many moles would 7.84 x 10^25 atoms of magnesium be? – Show Work

How many moles would 7.84 x 10^25 atoms of magnesium be? – Show Work

02/08/17

#### What is the mass of 1.2 x 10^-3 moles of sodium chloride? – Show Work

What is the mass of 1.2 x 10^-3 moles of sodium chloride? – Show Work

02/08/17

#### How many grams in 3.91 moles of sodium? – Show Work

How many grams in 3.91 moles of sodium? – Show Work

02/08/17

#### How many grams in 45.22 moles of strontium? – Show Work

How many grams in 45.22 moles of strontium? – Show Work

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

10/24/16

#### there is 6.10g of Cobalt (II) Nitrate, Co(NO3)2, what is the molar mass?

there is 6.10g of Cobalt (II) Nitrate, Co(NO3)2, what is the molar mass?

01/27/16

#### CHEMISTRY PLEASE HELP?!!!Determine the molar mass of a compound - given freezing point and masses of components in a solution?

A company is studying the use of a compound as a potential antifreeze. When 0.243 g of the compound is dissolved in 25.0 g of water, the freezing point of the solution is -0.201 * Celsius.
a....
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01/13/16

#### A volume of 253 mL of hydrogen is collected over water; the water level in the collecting vessel is the same as the outside level. Atmospheric pressure is 756.0

A 0.548 gram sample of a metal, M, reacts completely with sulfuric acid according to:M(s)+H2SO4(aq) -> MSO4(aq)+H2(g)A volume of 253 mL of hydrogen is collected over water; the water level in...
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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?

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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