Which is a characteristic of an Atoms

1. They come in 10 major types

2. They are smallest Unit of matter

3. They can be divided

4. They cannot combine together

The solubility of a compound with a molecular weight of 233.2 is determined to be 27.9 g in 125.0 g of water at 398 K. Express this concentration in terms of molality. 0.957

Why is temperature not a chemical change

What skills enabled Galileo to interpret the results of his experiments

How are weathering and erosion the same?

A criminalist uses a fluorescent chemical called rhodamine, cyanoacrylate fumes, and a uv light source to see a fingerprint on a gun. Which type of evidence is he detecting? Gross evidence latent evidence direct evidence trace evidence

Hydrochloric acid is purchased in 12 molar concentrations. If I needed 200 ml of 2.0 molar HCl, how many milliliters of the concentrated solution would I need

Which of the following represents a chemical change? Bending a wire Freezing of water Fireworks exploding Melting of a wax candle

5.00 L of a gas is collected at 100K and then allowed to expand to 20.0 L. What must the new temperature be in order to maintain the same pressure? A. 400 °C B. 127 °C C. 223 °C D. 627°C

Before the initial explosion was the matter hot or cold

Which of the following atoms has seven valence electrons? chlorine (Cl) nitrogen (N) manganese (Mn) oxygen (O)