A star has a spectrum with lines indicating the presence of ionized helium. This star should be classified as a (n)

O

A

G

M

If the burning of magnesium is incomplete how will this procedural error affect the reported mass of 1) magnesium in magnesium oxide? explain 2) oxygen in magnesium oxide? explain

How many grams are in 1.0 moles of baking soda?

The equation 2NaNO3 CaCl2=2NaCl Ca (NO3) 2 is balanced. How many atoms of oxygen are there on each side of the equations?

Which of the following solutions is a good buffer system? Which of the following solutions is a good buffer system? a solution that is 0.10 M HF and 0.10 M LiC2H3O2 a solution that is 0.10 M HC2H3O2 and 0.10 M LiC2H3O2 a solution that is 0.

If you mix a 25.0mL sample of a 1.20m potassium sulfide solution with 15.0 mL of a 0.900m basium nitrate solution and the reaction occurs. K25 (aq) + Ba (NO₃), (ag) 2 KNO₂ (aq) + Bas (s). If the above reaction produced 2.

When does a spring tide take place? At the beginning of spring Only during the spring season Only after spring is over At any time

The highest cloud are known as

What is the mass of 4.85 X 10^22 atoms of iron (Fe) ?

If element x has 95 protons how many electrons does it have

Which of the following when dissolved in deionized water would make a good conducting solution? a) methanolb) sugarc) baking soda