What element is used as a shield to protect people from radioactive substances?

A force that all objects have? proton, electron, electric charge, attract, repel, positive ion, negative ion

How many grams of al are in 4.70 moles?

During a reaction 24 cubic cm of carbon dioxide was given off. After 8 minutes no more gas was produced and the reaction was complete. What was the rate of this reaction.

Which ionic bond is predicted to have the smaller bond enthalpy?

Which of the following does not describe nor contain electrons? 1. a subatomic particle having a mass of 0.00055 u 2. a cathode ray 3. a subatomic particle having a charge of -1 4. a γ ray 5. a β particle

4Al (s) + 3O2 (g) - >2Al2O3 (s) the reaction is started by mixing 10.0g of Al and 10.0g of O2. What is the limiting reaction and how much Al2O3 is produced?

F 3.84 moles of methane are consumed in this reaction, how many moles of HCN will be produced?

Two metals with equal mass and different heat capacities are subject to the same amount of heat; which undergoes the smallest change? a) The metal with the higher heat capacity. b) The metal with the lower heat capacity.

What is the first man made organic compound synthesized in laboratory?

Express (3 x 104) (4 x 1023) in scientific notation