Identify the following:

1. The only 2 liquid elements.

2. The element in period 4, group 0.

3. The second metalloid in period 4.

4. The first element in group 4A.

When many students measure the concentration of the same solution for a chemistry course laboratory assignment, do their measurements follow a normal distribution?

Non-metal liquid with 45 neutrons

What is the theoretical yield of sodium oxide (Na₂O) in grams when 20.0g of calcium oxide (CaO) reacts with an excess amount of Sodium chloride? 2NaCl+CaO->CaCl2+Na2O The 2 at the end of the equation is not a coefficient it's for Na2. 10.0g 22.1g 32.

What option gives the correct mole ratio

For a single H2 molecule, H2 → 2H, the dissociation energy is 4.52 eV. How much energy would have to be put in (in kJ) to dissociate a mole of hydrogen molecules?

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.