All atoms of the same element have the same number of neutrons, but they may have varying numbers of protons.

True

False

Can the volume of a gas be measured? Yes, just the measure the volume of the container it is in. No, the volume will always be different so it is inaccurate. No, gas is soluble in liquid so it cannot be determined.

21.7 mL of gas at 98.8 kPa is allowed to expand at constant temperature into a 52.7 mL container. What is the new pressure of the gas? kPa.

SI units are based on multiples of what number?

Use the oxidation rule to determine the oxidation number of carbon in H2CO3

2 H2 + O2 → 2 H2O How many grams of H2O are produced when 2.50 moles of oxygen are used?

Calculate the moles of new H₂ O₂ using the balanced formula below and the average moles of KMnO₄ from calculation #2. The average moles of KMnO₄ is 0.90mol. 2KMnO₄ + 5H₂O₂ + 3H₂SO₄ → K₂SO₄ + 2MnSO₄ + 8H₂O + 5O₂ Edit: I got 2.

How many grams of CaC2 would make 23.6g C2H2?

Shane performed the following trials in an experiment. Trial 1: Heat 30.0 grams of water at 0 °C to a final temperature of 40.0 °C. Trial 2: Heat 40.0 grams of water at 10.0 °C to a final temperature of 40.0 °C.

According to the law of conservation of ___ in an isolated system the initial total momentum before a collision equals the final total momentum.

What is the correct name fore this formula Al2O3