Which of the following is used to separate the parts of mixtures a. Atomic number. B. Physical properties. C. Microscopes. D. Burning

Easy way chlorine exists mainly as two isotopes 37cl and 35cl which is more abundant

Are there any seasons in North Pole?

Write and balance the equation for the formation of magnesium hydroxide and hydrogen from magnesium and water. Determine the possible mole ratios.

A compound composed of only sulfur and aluminum is analyzed. The mass ratio of aluminum to sulfur is found to be 1.00:1.78. Find the empirical formula of this compound. (Hint: don't forget to find the moles of each first!) Select one: a. Al2S3 b.

A Lewis dot structure for this atom has six electrons around the symbol. Which of the following could be the atom? a. phosphorus (P) b. xenon (Xe) c. aluminum (Al) d. oxygen (O)

Helium (He), oxygen (O), carbon (C) fluorine (F), and chlorine (Cl) are all nonmetals. Using the periodic table, which pair of nonmetals do you predict has the most similar properties, and why?

Calculate the volume of a 1.25 M solution of HCN made from 31 grams of HCN

How to find the valency of a polyatomic ion?

Which of the following is true in regard to a charged atom? A. The number of protons and the number of electrons within the same atom are unequal. B. When an atom gains an electron, it becomes a cation, which is positively charged. C.

What is cycloalkane?