Which molecule contains a triple covalent

bond?

(1) H2 (3) O2

(2) N2 (4) Cl2

13. What is a falling objects speed at 6s? 9s? 112s?

What is the molar mass, in grams, of a mole of an element equal to?

When a 6.00 g sample of KBr is dissolved in water in a calorimeter that has a total heat capacity of 2.71 kJ ⋅ K - 1, the temperature decreases by 0.370 K. Calculate the molar heat of solution of KBr.

If 80 grams of Al and 80 grams of Fe2 O3 are combined, what is the maxium number of moles of fe that can be produced?

What is the oxidation number of manganese in the permanganate ion (mno4 - ) ? a. 3 b. 2 c. 7 d. 2-

What is the net ionic equation for the following reaction? H2CrO4 + Ba (OH) 2

How does improving food-storage facilities make farming more sustainable? A. It decreases the amount of water needed. B. It keeps food from rotting as quickly and being wasted. C. It decreases the amount of land needed. D.

Which of the following shows the correct net ionic equation for the reaction between HCl and NH3?

How would non secretion of of saliva effect digestion of food in the mouth.

Which of the following is insoluble in water? a." (NH) SO b. Na so c. Maso d. ZnSO e Baso