A person is told to take 1.25mg of vitamin D daily. How many 0.500-mg tablets should this person take?

How do the number of protons change as atomic number increases by one

M) The chemical formula of sodium carbonate is Na2CO3- Sate how many carbon atoms are present in the formula

What property of metals allows them to be shaped into wires?

What is hydrogen gas

A single atom of oxygen cannot be subdivided into simpler substances by any physical or chemical means. Therefore, it is:

Assuming that air contains 78 percent N2, 21 percent O2 and 1 percent Ar, all by volume. How many molecules of each type of gas are present in 1.0 L of air at STP?

Two children are playing tag. Child A who is doing the chasing can run 100m in 24 seconds Child B is running away from child A and can run 64m in 21 seconds.

What ion does a base increase

What is the definition of Amplitude?

An excess of NiCO3, 12 g, was added to 40cm cube of sulpheric acid, 2.0 mol/dm cube. The unreacted nickel carbonate was filtered out and the filtrate evaporated to optain the crystals.