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Flashcards in 1EXAM- HChem Deck (105)
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What is the N, A, and S number of SO3?

32, 24, 8

1

What is the N, A, and S number of H2O2?

20, 14, 6

2

What is the N, A, and S number of BCl3?

30, 34, 6

3

Name this compound: HCl

Hydrochloric Acid

4

Name this compound: CuCl2

Copper (II) Chloride

5

Name this compound: CO

Carbon Monoxide

6

Name this compound: HClO4(aq)

Perchloric Acid

7

Name this compound: SiBr4

Silicon Tetrabromide

8

Write the formula for this compound: Tin (II) fluoride

SnF2

9

Write the formula for this compound: Hydroiodic Acid

HI(aq)

10

Write the formula for this compound: diphosphorus pentoxide

P2O5

11

How many atoms are in 4.0 x 10^-5 g of aluminum?

8.9 x 10^17

12

What is the molar mass of (NH4)3PO4?

149.0 g/mol

13

How many hydrogen atoms are in one molecule of (NH4)2PO4?

8

14

What is the percent composition of hydrogen in water?

11%

15

What is the percent nitrogen (by mass) in (NH4)2CO3?

29.2%

16

What is the molar mass of CO2?

44.0 amu

17

What is the molar mass of NaOCl?

74.5 amu

18

What is the molar mass of Ca(OH)2?

74.1 amu

19

Find the percent composition of each element in he compound: H2SO4

H = 2.0%, S = 32.7%, O = 65.2%

20

Find the percent composition of each element in he compound: CO2

C = 27.3%, O = 72.7%

21

Find the percent composition of each element in he compound: Al2S3

Al = 35.9%, S = 64.1%

22

Copper has two isotopes. Copper-63 is 69.17% abundant and it has a mass of 62.9296 amu. Copper-65 is 30.83% abundant and it has a mass of 64.9278 amu. What is the weighted average mass of the two isotopes?

63.55 amu

23

The identity of an atom is determined by the number of

Protons

24

The number of protons and neutrons combined is the

Atomic mass

25

Isotopes have the same number of _____, but a different number of ______

Protons, neutrons

26

The number of protons is called the

Atomic number

27

Janet, how do you spell the element F?

Fluorine

28

What's the symbol for tin

Sn

29

What's the symbol for silver

Ag