Question

In a chemical reaction, matter cannot be created or destroyed. The mass prior to the chemical reaction will be the same mass after the chemical reaction.

a
True
b
False
Question 2 (1 point)
In the first image in the video, how many purple atoms are shown in the reactants and products?

a
4
b
6
c
7
d
9
Question 3 (1 point)
What example of an open system during a chemical reaction does Ms. Aguirre explain in the video?

a
a car rusting
b
combining chemicals in a flask
c
CaSO4

d
wood burning with ash and smoke
Question 4 (1 point)
In the video, Ms. Aguirre shows a chemical reaction of a log + fire which becomes ashes + smoke.



What is the mass of the smoke in the chemical equation?

a
30 kg
b
31 kg
c
3 kg
d
28 kg
Question 5 (1 point)
When looking at how to read a Chemical Reaction in the. video, how many Hydrogen atoms are in the product?

a
1
b
2
c
3
d
4
English

Answer 1

Here are the answers:

1) True (a)
2) 6 (b)
3) wood burning with ash and smoke (d)
4) 3 kg (c)
5) 2 (b)