HW CHECK: Molar Mass & Percent Composition

Referring to 1(a): Which two numbers would you use to find the molar mass?

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NGSS.HS-PS1-1

Referring to 1(b)

What is the molar mass of H₂SO₄ rounded to two decimal places?

Mathematical Equivalence

ON

Referring to 1(c) How many atoms of each in magnesium phosphate?

a

b

c

6

4

3

5

1

2

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NGSS.HS-PS1-3

NGSS.HS-PS1-7

#2) Which is the correct set up for percent composition of CaO?

#3) Reorder the following from LOWEST TO HIGHEST percentages:

• Sulfur

• Hydrogen

• Nitrogen

• Oxygen

#4) What is the total MOLAR MASS of Cr(NO₃)₂ rounded to 2 decimal places?

Mathematical Equivalence

ON

STILL #4) What is the percent composition of oxygen in chromium nitrate? Rounded to 2 decimal places. O=

Mathematical Equivalence

ON

#5) The mass of carbon is ​ (a)   . The mass of hydrogen is ​ (b)   . The total molar mass of C₂H₆ is ​ (c)   . The percent comp of carbon is​ (d)   and the percent comp of hydrogen is​ (e)   .

• 12.01
• 1.01
• 30.08
• 79.85
• 20.15
• 2
• 6

Tags

NGSS.HS-PS1-7