moles

molar mass

100

what is the molar mass of H_2?

2.016 GRAMS

200

What is the Molar mass of C₂H₃?

27.046 GRAMS

300

what is the molar mass of K₂SO_4?

174.258 GRAMS

400

What is the molar mass of (NH₄)₃P?

85.091 GRAMS

500

What is the molar mass of Mg₃ (PO₄)_{2 ?}

262.855 GRAMS

empirical/molecular mass and formula

100

what is the empirical formula for C₆H_6?

CH

200

what is the empirical formula for C₂H₆O_2?

CH₂O          

300

What is the molecular mass of C₄H₄O with a MM of 136 grams?

C₈H₈O₂

400

What is the molecular mass of C₂H₄NO with a MM of 116.1 grams?

C₂H₈N₂O₂

500

What is the empirical mass for compounds that consist of 21.2% N, 6.1% H, 24.2 % S, and 48.5% O?

N₂H₈SO₄

percent composition

100

what is the percent composition of H?

H-100%

200

what is the percent composition of H₂S?

H- 5.92%

S-94.08%

300

What is the percent composition of C in C₂H₄K?

C-35.77%

400

what is the percent composition of S and K in S₅K₂O₃Cl?

S-49.80%

K-24.85%

500

what is the total percent composition for all elements of Li₂N₃F₆Ne_2?

Li- 6.60%

N- 19.99%

F- 52.22%

Ne- 19.19%

mole coversions

100

how many moles are in 25.2 g of H₃PO_4?

.257 mol

200

how many atoms are there in 56 moles of silver?

3.37 x 10^{25.      P Ag}

300

how many moles of SiO₂ are in 15.5g?

.258 mol

400

if you have 9.13 x 10²⁵ particles of NaCl, how many grams would you have?

8860g

500

how many h atoms are in 17.5 g (NH₄ )C₂O_4?

6.79 X 10²³

all about me.

100

who discovered moles?

Avogrado 

200

When were moles discovered?

IN 1811

300

What is the equation for moles?

6.022 x 10²³

400

What is a mole? ( simple form )

amount of substance in a system

500

How does a chemist use a mole in conversions?

they generally use the mole as the unit for the number of atoms or molecules of a material.