How many molecules are in one mole of a compound?

X2SO3 Enter the group number of X. How do I find this? Chemistry

A calculator answer of 423.6059 must be rounded off to three significant figures. what answer is reported?

Which statement is true for the given equation? ZnI2 + Br2 Bromine will combine with zinc iodide during the reaction. Bromine will replace iodine during the reaction. No reaction will occur. Bromine will replace zinc during the reaction.

What is the concentration of 10. moles of copper (II) nitrate in 5.0 liters of solution

Consider the balanced equation. 2hcl + mg mgcl2 + h2 if 40.0 g of hcl react with an excess of magnesium metal, what is the theoretical yield of hydrogen? 1.11 g 2.22 g 52.2 g 104 g

Which is the best predictor of the radioactive nature of an isotope? (A) the proton-to-electron ratio (B) the neutron-to-proton ratio (C) the neutron-to-electron (D) ratio the electron-to-proton ratio

Which of the following statements correctly describes the relationship between fossils and rock strata? Fossils found in the rock strata are all the very small in size. Fossils are all found only in the top layers of the rock strata.

The trend for ionization energy is a general increase from left to right across a period. However, magnesium (Mg) is found to have a higher first ionization energy value than aluminum (Al).

A man is about to receive a bone marrow transplant. He is taking pills to suppress his immune system so that: A. his immune system does not attack the transplanted marrow. B. his immune system can recover after surgery. C.

Nickel (ii) chloride dissolves in water to form a light green solution. what ions are present in solution-that is, what is "swimming around" in the aqueous solution? write the formulas