Can I fly out in space yet

Is water going from liquid to solid a physical or chemical change and why

Zero is the freezing temperature of water on which temperature scale?

What are three types of evidence that supports sea floor spreading

1. The first four-legged animals to reach land were classified as 2. Pangaea was fully formed during the late Period. Respond to the following based on your reading. W 3.

How many days pass until the exact same Moon shape reappears?

What reaction might we use to synthesize nickel sulfate, NiSO4? Write equations for acid-base neutralization. Include states in your answer. Write equations of acid with carbonate. Include states in your answer.

5.0 mL of ethanol has a mass of 3.9g and 5.0 mL of benzene has a mass of 44g what is the density of each liquid which is denser

Which of the following reacts differently when exposed to strong acids than when it is exposed to weak acids? A. Electrical current conduction B. pH paper test C. Reaction with magnesium D. All of these

The half-life of 222Rn is approximately 4 days. A sealed vessel is found to contain 1.5 mg of 222Rn. How much radon would have been present 12 days before this measurement was taken?

What do chemical symbols and formulas represent, respectively? atoms and mixtures compounds and mixtures elements and ions elements and compounds