Show:
Make my name
I mass be smart
Formula One
I Chem you
Atomic explosion
100

Chemical name:

NaOH

sodium hydroxide

100

Relative formula mass

HCl

36.5

100

Balance equation, true or false?

N2 + 3H2 to 2NH3

True

100

What is the percentage of sodium in Na2CO3?

43.40%

100

Relative Atomic Mass

Ca

40

200

Chemical Name:

CaO

Calcium oxide

200

calculate the mass of 3 moles of potassium atoms

117g

200

Balance this equation:

___ Al + ___ NaOH ___ Na3AlO3 + ___ H2

2 Al + 6 NaOH 2 Na3AlO3 + 3 H2

200

What percent of AgNO3 is silver?

63.5%

200

What is the Avogadro constant?

The number of particles present in one mole of any substance is fixed with a value of 6.022 × 1023

300

Chemical Name:

Na(NO3)2

Calcium nitrate

300

How many grams of aluminum are in 30 moles of the metal?

810g

300

Balance this equation:

___ Cu + ___ HNO3 ___ Cu(NO3)2 + ___ NO + ___ H2O

3 Cu + 8 HNO3 3 Cu(NO3)2 + 2 NO + 4 H2O

300

What is the percent solution (by volume) when 50ml of ethanol is diluted to 140ml with water?


%= 60/140ml x 100 = 36%

300

Define relative atomic mass.

mass of a particular atom compared to the mass of an atom of hydrogen or simply same as mass number

400

Chemical formula 

Potassium sulfite

K2SO3

400

Which is the mass of 1 mole of chlorine gas?

(round off mass to the whole number) 

72g

400

What is the reaction type of this equation:

Sulfurous acid breaks down into water and sulfur dioxide gas.

a. double displacement

b. Decomposition

c. replacement/single replacement

b. Decomposition

Decomposition reactions.

These reactions follow the pattern:

AB→ A+B

400

Find the percent composition of this compound:

Al2(SO4)3

Al: 16%

S: 28%

O: 56%

400

True or False:

Relative atomic mass is always smaller than the atomic number

False. It is bigger

500

Chemical name:

C12H22O11

Sugar

500

0.5 moles of metal have a mass of 20 g. which is the molar mass of the element?

40g (Calcium)

500

Balance this equation:

Al4C3 +H2O→ Al(OH)3 +CH4

Al4C3 +12H2O→ 4Al(OH)3 +3CH4

500

A certain newly synthesized compound is known to contain the elements zinc and oxygen.  When 30.00 grams of the sample decomposed; 24.12 grams of zinc remains. Determine the percent composition of the compound.

% of zinc = 80.40%

% of oxygen = 19.60%

500

What is the unit for the relative atomic mass

amu