Question 1

In the following equation, what is/are the reactants?   $H_2$ + $Cl_2$ --> 2 HCl

Accepted Answer

$H_2$ + $Cl_2$

Answer

HCl

Answer

$H_2$

Answer

$Cl_2$

Question 2

In the following equation, what is/are the products?   $H_2$ + $Cl_2$ --> 2 HCl

Accepted Answer

HCl

Answer

$Cl_2$

Answer

$H_2$

Answer

$H_2$ + $Cl_2$

Question 3

What is the definition of a precipitate?

Accepted Answer

solid product

Answer

liquid product

Answer

any product

Answer

solid reactant

Question 4

What is something that you would see to indicate formation of a gas?

Accepted Answer

bubbles

Answer

water

Answer

precipitate

Question 5

What does "aqueous" mean?

Accepted Answer

dissolved in water

Answer

solid

Answer

liquid

Answer

gas

Question 6

Is the following equation balanced correctly?   $3H_2$ + $O_2$ -->  $6H_2O$

Accepted Answer

No

Answer

It should be simplified

Answer

Yes

Question 7

Is the following equation balanced correctly?   2Na + $Cl_2$ -->2NaCl

Accepted Answer

Yes

Answer

It should be simplified.

Answer

No

Question 8

Is the following equation balanced correctly?   $4H_2$ + $2O_2$ -->  $4H_2O$

Accepted Answer

It should be simplified

Answer

No

Answer

Yes

Question 9

What type of reaction is the following?  2K + $Br_2$ --> 2KBr

Accepted Answer

Synthesis

Answer

Combustion

Answer

Decomposition

Answer

Single Replacement

Question 10

What type of reaction is the following?  $NH_4OH$ --> $NH_3$ + $H_2O$

Accepted Answer

Decomposition

Answer

Single Replacement

Answer

Combustion

Answer

Synthesis

Question 11

What type of reaction is the following?    2$C_2H_6$ + 7$O_2$ --> 4 $CO_2$ + 6 $H_2O$

Accepted Answer

Combustion

Answer

Single Replacement

Answer

Synthesis

Answer

Double Replacement

Question 12

What type of reaction is the following?   $Al_2O_3$  + 3Mg --> 3MgO +2 Al

Accepted Answer

Single Replacement

Answer

Combustion

Answer

Synthesis

Answer

Double Replacement

Question 13

If you mix red and yellow solutions together and get an orange solution as a result, is that likely a chemical or physical change?

Accepted Answer

Physical change

Answer

Chemical change

Question 14

If you mix red and yellow solutions together and get a blue solution as a result, is that likely a chemical or physical change?

Accepted Answer

Chemical change

Answer

Physical change

Question 15

Which is NOT an indicator of a chemical reaction? Assume you are mixing two substances together.

Accepted Answer

Change in shape

Answer

Temperature change

Answer

Formation of a precipitate

Answer

Color change

Question 16

Which is the correct equation for the particle diagram? White is W and Red is R.

Accepted Answer

$2W_2$ + $R_2$ --> $2W_2R$

Answer

$W_4$ + $R_2$ --> $2W_2R$

Answer

$W_4$ + $R_2$ --> $W_4R_2$

Answer

$2W_2$ + $2R$ --> $2W_2R$

Question 17

Which particle diagram is correct for the following equation? G is Green, Y is Yellow     2 G + $Y_2$ --> 2 YG

Accepted Answer

https://uploads.quizalize.com/7bc3301d-7d92-415c-a390-1ef89f9a9c50/question/258f0555f43ae33bcb3d2ce8635a5c9c8c13f95c.png

Answer

https://uploads.quizalize.com/7bc3301d-7d92-415c-a390-1ef89f9a9c50/question/fff3a82dec405aef5286e022434e3696d61ee5b9.png

Answer

https://uploads.quizalize.com/7bc3301d-7d92-415c-a390-1ef89f9a9c50/question/6b75bfcafa4270e123f00baeed8af18ed624dc3e.png

Question 18

In the following reaction, a student starts with 32 g of $CaCl_2$ and 96 g of $Na_2SO_4$. The reaction produces 76 g of $CaSO_4$. How many g of NaCl is also produced? CaCl2 (aq) + Na2SO4 (aq) → CaSO4 (s) + NaCl (aq)

Accepted Answer

52

Answer

204

Answer

96

Answer

32

Question 19

In any reaction, how does the mass of the reactants compare to the mass of the products?

Accepted Answer

Mass of the reactants is equal to the mass of the products.

Answer

Mass of the reactants is less than the mass of the products.

Answer

Mass of the reactants is greater than the mass of the products.

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