Math Addition

What is the sum of the atomic numbers of Hydrogen and Helium?

• 1

• 2

• 3

• 4

If you add the atomic masses of Carbon and Oxygen, what is the approximate total?

• 12

• 16

• 28

• 44

Tags

NGSS.MS-PS1-1

In a chemical reaction, if you add 2 moles of Hydrogen to 1 mole of Oxygen, how many moles of water are produced?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-5

What is the result of adding the number of protons in a Carbon atom to the number of protons in a Nitrogen atom?

• 6

• 7

• 13

• 14

If you add the pH values of two solutions, one with pH 3 and another with pH 5, what is the result?

• 8

• 15

• 1

• 0

What is the sum of the coefficients in the balanced equation of the combustion of methane: @@ ext{CH}_4 + 2 ext{O}_2 ightarrow ext{CO}_2 + 2 ext{H}_2 ext{O}@@?

• 4

• 5

• 6

• 7

Tags

NGSS.MS-PS1-5

If you add the number of valence electrons in a Sodium atom to those in a Chlorine atom, what is the total?

• 1

• 7

• 8

• 9

What is the sum of the oxidation states of all elements in water (H2O)?

• 0

• 1

• 2

• -2

Tags

NGSS.MS-PS1-1

If you add the boiling points of water and ethanol, what is the approximate total in Celsius?

• 100

• 78

• 178

• 200

What is the result of adding the electronegativities of Fluorine and Chlorine?

• 3.0

• 4.0

• 6.0

• 7.0