What letter is not used as a symbol of chemical element?

What can most likely be concluded about these substances

If an atom donates or accepts an electron, what is it considered

Calculate the molar mass of a gas that diffuses three times faster than oxygen under similar conditions.

What's the most important factor in determining an elements place in the periodic table?

You can smell perfume because of which change of state

Which principle explains why it is necessary to have safety belts in cars?

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