1. How many molecules of barium hydroxide, Ba (OH) 2 are there in 21.9 grams of barium hydroxide?

Any object that travels around another object in space is a (n) -

What type of energy transformation occurs in a campfire? 1. light energy to mechanical energy 2. thermal energy to light energy 3. mechanical energy to chemical energy 4. chemical energy to light and thermal energy

Tania's mom boils water in a pot on the stove to make soup. Which of these ingrediente will dissolve in the water?

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Determine the value for the following reaction. N2 (g) + 3H2 (g) → 2NH3 (g) + 22,000 cal ΔH =

How is the ocean important to human survival? restate the question

A sample of pure lithium contains 7.99% lithium by mass. What is the % lithium by mass in a sample of pure lithium nitrate that has twice the mass of the first sample?

What ecosystem is being described in the passage?

In the enzyme reaction above, catechol is the substrate, oxygen is a reactant, catechol oxidase is the enzyme, benzoquinone is the product, and water (H2O) is a by-product. Which of the following will decrease the rate of this reaction? a.

How do acids and bases affect the quality of freshwater sources?