Search Header Logo

The Whytboard Molar Mass, Moles, Mass

Authored by jho jho

Science

University

Used 3+ times

The Whytboard Molar Mass, Moles, Mass
AI

AI Actions

Add similar questions

Adjust reading levels

Convert to real-world scenario

Translate activity

More...

    Content View

    Student View

8 questions

Show all answers

1.

MULTIPLE SELECT QUESTION

30 sec • Ungraded

Media Image

Good luck on your Whytboard quiz about molar , mass, moles, and mass! You've got the fundamentals down! Stay calm, trust your calculations, and convert with confidence; small steps like mass over molar mass will lead you to the right answers. Crush it ! You're ready to mole the competition!

LET'S GO !

PADAYON !

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Using the given provided Cu = 63.55 g/mol

  • S = 32.07 g/mol

  • O = 16.00 g/mol, Calculate the molar mass of CuSO4

234 g/mol

159.5 g/mol

146.5 g/mol

156 g/mol

Answer explanation

Media Image

  • (Like the illustration given, simply add)

  • Copper (Cu) atomic mass = 63.55 g/mol

  • Sulfur (S) atomic mass = 32.07 g/mol

  • Oxygen (O) atomic mass = 16.00 g/mol, and there are 4 oxygens, so 16.00×4=64.0016.00×4=64.00 g/mol

Add these together to get the molar mass:
63.55 + 32.07 + 64.00 = 159.62 g/mol

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

For 10 g of CuSO₄, calculate its moles

0.067 mol.

0.68 mol.

0.063 mol.

0.066 mol.

Answer explanation

Media Image

  • To calculate the number of moles (n) of CuSO₄, use the formula n=m/M, where mm is the mass in grams and MM is the molar mass (159.61 g/mol).

For 10 g of CuSO₄,

n= 10/159.6110

n = 0.063 mol.

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Using the identified moles, calculate the mass of CuSO₄

100.55grams

100.5grams

102.55grams

101.55grams

Answer explanation

Media Image

  • To calculate the mass of CuSO4 for 0.63 moles, use the formula:

  • m = n x Mr

  • m = 0.63moles × 1 59.6g/mol

  • m = 100.55 g

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Calculate the molar mass of Cr₄(P₂O₇)₃ using the given g/mol below
Cr = 51.996 g/mol

P = 30.974 g/mol

O = 15.999 g/mol

745.81 g/mol

748.56 g/mol

729.81 g/mol

734.61 g/mol

Answer explanation

Media Image

(Like the illustration given, simply add)

Chromium (Cr): 4 atoms × 51.996 g/mol = 207.98 g/mol

  • Phosphorus (P): 6 atoms (2 per P₂O₇ × 3) × 30.974 g/mol = 185.84 g/mol

  • Oxygen (O): 21 atoms (7 per P₂O₇ × 3) × 15.999 g/mol = 335.98 g/mol

  • Total: 207.98 + 185.84 + 335.98 = 729.81 g/mol.

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The number of moles of Cr₄(P₂O₇)₃ in 10 g is _____

0.016 mol.

0.015 mol.

0.017 mol.

0.014 mol.

Answer explanation

Media Image

  • To calculate the number of moles (n) of Cr₄(P₂O₇)₃, use the formula n=m/M, where mm is the mass in grams (10g) and MM is the molar mass 729.81 g/mol

For 10 g of CuSO₄,

n= 10/729.81 g/mol

n = 0.014mol

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Using the identified moles, calculate the mass of Cr₄(P₂O₇)₃

9.24 g

10.22 g

12.54 g

  1. 7.56 g

Answer explanation

Media Image

  • To calculate the mass from the identified moles of Cr₄(P₂O₇)₃:

    • Given moles = 0.014 mol

    • Molar mass MM = 729.81 g/mol

    Use the formula:

    Mass = Moles × Molar mass

Solution:

  • Mass = 0.014×729.81 =10.22 grams

  • Mass = 10.22grams

Access all questions and much more by creating a free account

Create resources

Host any resource

Get auto-graded reports

Google

Continue with Google

Email

Continue with Email

Classlink

Continue with Classlink

Clever

Continue with Clever

or continue with

Microsoft

Microsoft

Apple

Apple

Others

Others

Already have an account?