Give the approximate bond angle for a molecule with a trigonal planar shape.

A) 109.5°

B) 180°

C) 120°

D) 105°

E) 90°

You want to test how the mass of a reactant affects the speed of a reaction. Which of the following is an example of a controlled experiment to test this?

A metal (M) forms an oxide with the formula MO. If the oxide contains 7.17 % O by mass, what is the identity of the metal?

In comparison with refrigerated eggs, eggs without refrigeration age how long in one day

If you burn 29.8 g of hydrogen and produce 267 g of water, how much oxygen reacted?

Describe the difference between physical change and chemical changes in terms of what happens to the particles

How much water should be added to 20 ml of 20 % alcohol solution to reduce the concentration to 10 %?

Calculate the theoretical atom economy for each reaction. a. 2 cuo (s) + c (s) → 2 cu (s) + co2 (g)

In the coordination compound (NH4) 2[Fe (OH2) F5], the Fe is octahedrally coordinated. (a) Based on the fact that F is a weak-field ligand, pre - dict whether this compound is diamagnetic or para - magnetic.

Which of these is a good conductor? 1) wood 2) air 3 ) silver 4) paper

Explain the energy transformation that must occur for your body to participate in a physical activity, such as playing a sport.