Classify the following statements regarding the law of mass conservation as true or false.

-it explains why mass is conserved

-it was developed from past observations

-it predicts future observations

-it is subject to experimentation and revision

A gas that occupies 50.0 liters has its volume increased to 68 liters when the pressure was changes to 3.0 ATM. What was the original pressure of the gas in ATM?

One of the more important chemical reactions of the alkanes is

Which of the following is equal to the number of particles in 36 grams of carbon-12? B. 3 moles A. 3:1 molar mass C. 3:1 mole ratio D. 1:3 molar volume

How much solute can be dissolved in 100 ml of water at 41 degrees celsius

What is an empirical formula? O A. The chemical formula that reveals how the molecule actually exists in nature O B. The chemical formula that is written in terms of percent composition O C.

Which one of the following is a redox reaction?. 2 Na (g) + Cl2 (g) 2 NaCl (s) A. K2Cr2O7 (aq) + 2 KOH (aq) 2 K2CrO4 (aq) + H2O (l) B. H2O (l) H + (aq) + OH - (aq) C. Na2CO3 (s) + 2 HCl (aq) 2 NaCl (aq) + CO2 (g) + H2O (l) D.

Name 4 common chemical properties of matter

Why is photosynthesis so important to plants, and can't animals use it?

One way the government of Kim Jong-il controls the lives of the people who live in North Korea is by a. requiring every citizen to vote. b. controlling information its people receive from the outside world. c. enforcing free trade with other nations.

Give reasons 1) copper utensils and sheets become blackish after some days