In a sample of 400 lithium atoms, it is found that 30 atoms are lithium-6 (6.0g/mol) and 370 atoms are lithium-7 (7.0g/mol). calculate the average atomic mass of lithium

Does a double bond count as one or two bonding pairs for hybridization

The solubility product constant of calcium hydroxide is 6.5x10-6. if 0.30 mol of sodium hydroxide is added to 2 l of 0.0010m ca (oh) 2, what is the final concentration of the calcium ion? show your work.

According to Vygotsky, which capability is demonstrated when young children imitate adult actions that are irrelevant, time-consuming, and inefficient?

Nitrogen has one more valence electron than a carbon has. What can you infer about nitrogen s location on the periodic table

What are the only things that can change in a valid experiment?

There are gps satellities orbiting the earth a) 28 b) 24 c) 42 d) 10

Which of the following is not true of a pseudoscience? It is a practice or belief that claims to be science, It does not follow the scientific method, It is not proven reliable through experimentation, It is a science that is controversial or

Why is it possible to bend metals but not ionic crystals

If the concentration of an analyte in a solution prepared by digesting a 2.05 g solid sample and making up to 100 mL, is found to be 21.1 mg L-1. What was the mass percentage of the analyte in the original sample?

If a particular ore contains 58.5% calcium phosphate, what minimum mass of the ore must be processed to obtain 1.00 kg of phosphorus?