Are new elements created when a chemical reaction happens?

Sometimes, if oxygen is involved

Most times, due to the use of heat

Are new substances created when a chemical reaction happens?

Most times, due to the reaction

Sometimes, if oxygen is involved

What elements make up sodium bicarbonate (baking soda) NaHCO 3 ?

sodium, hydrogen, carbon, oxygen

sodium, hydrogen, bicarbon, oxygenate

The Law of Conservation of Mass states that: Matter ...

is neither created nor destroyed

is constantly created and then destroyed

The number of components will _____ than the number of products.

all above are possible outcomes

In a reaction, what do you do with the mass of the container that the substances are in?

count it in the before and after

At the beginning of a chemical reaction, you have 235 oxygen atoms. At the end of the experiment, you should have _____.

the same amount of oxygen atoms

no oxygen atoms, they were all used up

While making popsicles, you use 10 grams of strawberries, and 50 grams of yogurt, stick a popsicle stick in it, and then let it freeze. When you weight it, you notice the popsicle weighs 61.3 grams, when it should weigh 60 grams. What happened?

You did not account for the mass of the popsicle stick.

Gravity pulls more on a solid, increasing the weight.

The strawberries condensed creating more mass.

Yogurt adds mass when it is frozen.

A cat with a mass of 4,000 grams gets a haircut and rinse. When measuring its mass after, it weighs 4,200 grams. How is this possible?

The water left on it adds 200 grams

It was laying down, so it increased the mass by 200 grams

They took a collar off of the cat that weighed 200 grams

It was later in the day, so gravity increased its mass

While conducting an experiment, 40 grams of ice is melted onto water. The end results is 38 grams of water. Which explanation is illogical?

When water is condensed the mass is greater resulting in a loss of mass when it turns into liquid form.

Some of the water could have sweated through the cup.

The lost two grams were gases trapped in the ice and were released into the atmosphere.

The water could have been spilled or lost when transferring to measure the mass.

The following equation is balanced: 2HCl + 2Na = 2NaCl+H 2 Why isn't there a "2" coefficient by the Hydrogen product?

The subscript means there are two hydrogen atoms.

You do not need two hydrogens to make the equations balanced

You have to account for the other hydrogens in the product.

Hydrogen is exempt from the Law of Conservation.

When looking at the products of a chemical reaction ...

the number of atoms must be equal on each side of the element

the number of products must be equal (2 reactants, 2 products)

there must be hydrogen in the answer since it's a basic element

must experience heat to create new products

Why is it important for a chemical equation to be balanced?

to ensure the same amount of atoms are present before and after the reaction

to keep explosions from happening, which could cause unaccounted atom loss

so that nothing iodized incorrectly

so that the subscripts add up to the total coefficients

When balancing a chemical reaction...

you can add coefficients to molecules

you can add subscript to molecules

you can subtract the subscripts to molecules

you can add coefficients and subscripts to molecules

Science Bowl 24-25

Quiz

•

Science

•

6th - 8th Grade

•

Practice Problem

•

Hard

•

NGSS

MS-PS1-5, MS-PS1-2, MS-PS1-1

+7

Standards-aligned

Used 6+ times

FREE Resource

45 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the chemical symbol for "gold"?

G

Au

O

Gd

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If we are given 100 grams of sodium, what would the equivalent be in kilograms?

1000

10

1

.01

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The common name for C₆H₁₂O₆?

air

sugar

calcium

water

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the event of a chemical reaction, the overall mass...

stays the same

increases every time

decreases

only decreases when gasses are involved

When solid sugar is added to liquid water, the sugar...

gets eaten by the water

evaporates into air

dissolves into the water

encases oxygen being released from the solution

When mixing liquids, the ___________ is the substance mixed in.

solvent

solute

solution

product

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What elements make up acetic acid (vinegar) C₂H₄O₂?

acid, carbon, oxygen, hydrogen

carbon, acetic, oxygen, hydrogen

acetic acid

carbon, oxygen, hydrogen

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Science Bowl 24-25

45 questions

What is the chemical symbol for "gold"?

If we are given 100 grams of sodium, what would the equivalent be in kilograms?

The common name for C6H12O6?

In the event of a chemical reaction, the overall mass...

When solid sugar is added to liquid water, the sugar...

When mixing liquids, the ___________ is the substance mixed in.

What elements make up acetic acid (vinegar) C2H4O2?

Are new elements created when a chemical reaction happens?

Are new substances created when a chemical reaction happens?

The number of elements will ______ after a chemical reaction has occurred.

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The common name for C₆H₁₂O₆?

What elements make up acetic acid (vinegar) C₂H₄O₂?