Determine the number of neutrons for the given isotopes. helium-3 carbon-14 nitrogen-15 strontium-90 tellurium-123

In which specific subshell is the highest energy electron in Ga found?

9. In a sample of gas, what causes pressure? Answer in a completesentence.

Which pair of organs, located in the lower back, collects liquid and waste from the blood? A. liver B. lungs C. kidneys D. skin

A blacksmith melts and shapes a block of iron into a blade. She then sets the blade, whose edges are molten, outside, where it is raining slightly. The blade's outer edges both solidify and then rust.

What are hydrogen bonds? What type of molecules do hydrogen bonds occur in?

Sodium chloride is stirred into water to form a solution. in this case, what are sodium chloride and the water?

What can form as a result of a chemical reaction?

A solution of orange juice that weighs 500 g contains liquid juice and solid pulp. All of the pulp is removed from the juice. The pulp is found to weigh 50 g. How much would the remaining liquid juice weigh? A. 50 g B. 250 g C. 450 g D. 500 g

Assume 3 molecules of Fe react according to the following equation. 3Fe + 4H2O Fe3O4 + 4H2 How many molecules of H2 are produced? How many water molecules are required? What is the mole ratio of Fe to H2O?

10.0 mL of a HF solution was titrated with a 0.120 N solution of KOH; 29.6 mL of KOH were required to completely neutralize the HF. Calculate the normality of the HF solution.