What is the metal with 4 valence

electrons and a mass greater than 200?

What is the formular for dichlorine trioxide

The specific heat of aluminum is 0.9 j/goc. how many joules of heat are needed to raise the temperature of 10grams of aluminum by 20°c?

How many hydrogen atoms are in 5.10 mol of ammonium sulfide?

1) A wagon with a weight of 136 N is moved 19 m from its original location. How much work was done?

Five gases combined in a gas cylinder have the following partial pressures: 3.00 atm (N2), 1.80 atm (O2), 0.29 atm (Ar), 0.18 atm (He), and 0.10 atm (H). What is the total pressure that is exerted by the gases?

What is the name of the scientist who discovered the electron

Which of these is not a covalent molecule? 1. F2 2. CO 3. LiF 4. NH3

Define buffer capacity. a. buffer capacity is the amount of acid or base that can be added to a buffer without destroying its effectiveness. b. buffer capacity is the amount of acid that can be added until all of the base is used up. c.

Which of the following is not a chemical reaction a) gas formation b) solid formation c) energy change d) state change

How many moles of copper are needed to react with sulfur to produce 0.25 moles Ol copper (1) sulfide according to the following reaction: 2 Cu + S + Cuzs