What is the pH of a solution with this hydrogen ion concentration?

[H⁺] = 3 x 10^-3 M

• 2.5

• 3

• 14

• 11.5

Find the number of grams of oxygen (O₂) that can be made from 44.8 Liters of O₂.

• 32.0 g O₂

• 16.0 g O₂

• 64.0 g O₂

• 22.4 g O₂

Tags

NGSS.HS-PS1-7

What element has 16 protons in its nucleus?

• oxygen (O)

• phosphorus (P)

• sulfur (S)

• sodium (Na)

According to the octet rule, atoms form ions or bonds in ways that give them how many electrons?

• 2

• 4

• 6

• 8

Which of these elements belongs to the group of most reactive metals and will explode when it reacts with water?

• chlorine (Cl)

• neon (Ne)

• iron (Fe)

• potassium (K)

If 1x10¹³ carbon dioxide molecules are formed, how many grams of water are also formed?

• 4x10^-10 g H₂O

• 1x10^-1 g H₂O

• 6.02x10²³ g H₂O

• 18.02 g H₂O

Tags

NGSS.HS-PS1-7

Determine the number of kilograms of baking soda, NaHCO₃, you would have if you started with 46.8 decigrams of baking soda.

• 46,800 kg

• 0.00468 kg

• 4.68 kg

• 0.468 kg

Which item is called a beaker?

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Which item is called a bunsen burner?

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Tags

NGSS.HS-PS3-4

Which item is called a graduated cylinder?

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