Match these items.

1. an atom that has gained or lost electrons ion

2. produces OH - ions when added to water acid

3. produces H + ions when added to water base

What is the mass of 0.500 moles of chlorine gas?

Why can't heat travel from cold to hot?

Oxalic acid is a diprotic acid. calculate the percent of oxalic acid (h2c2o4) in a solid given that a 0.7984-g sample of that solid required 37.98 ml of 0.2283 m naoh for neutralization.

At a constant temperature, a sample of a gas in a balloon that originally had a volume of 2.2 l and pressure of 749 torr has a change of pressure to 629 torr. calculate the new volume in liters.

How many milliliters of 0.50 M KOH are needed to exactly neutralize 10 milliliters of of 1.5 M HNO3 A. 5.0 mL B. 12 mL C. 25 mL D. 30 mL

Which statement is true for a pure compound but NOT true for a pure element?

Which one is uncelluar and which is multicelluar? crab or pond organism

An atom of lithium loses an electron. What is the effect of this event? Group of answer choices The atom of a different element is formed. The atom of lithium acquires no charge. The atom of lithium becomes a positively charged ion.

Water interacts with polar substances like - OH groups but not with non-polar substances like methyl (-CH3) or ethyl groups (-CH2). Using this information, select the molecules that will easily dissolve in water based on polarity not on size.

Which of the following statements is not considered weather? The wind is blowing 20 miles per hour right now in Kansas. It is raining in Seattle. It is usually humid in Florida. It is snowing in Colorado.