Which compounds are ionic and which are covalent?

• N2 • SiO2 • CaCl2

• CCl4 • AlCl 3 • LiBr

If a particular ore contains 55.4 % calcium phosphate, what minimum mass of the ore must be processed to obtain 1.00 kg of phosphorus?

Which of the following is an example of an Arrhenius base? a. KCl b. Ca (OH) 2 c. HC

How much voltage does a line with resistance of 10 ohms and current of 20amps?

Why can't all mixtures be classified as solutions? a. not all mixtures are homogeneous. b. not all mixtures have solutes and solvents. c. mixtures are made of only one substance. d. not all mixtures are heterogeneous.

How many moles of MgS2O3 are in 173 g of the compound?

What type of mixture is 100 ml of water with a little bit of salt?

Which statement explains why meiosis haploid cells rather than diploid cells

Which factors can affect the amount of coco mix that can be dissolved in water? Check all that apply

If 25% of a radioactive element remains after 1,000 years, what is the half-life?

How many valence electrons do the alkaline-earth elements have? a. 1 b. 2 c. 7 d. 8