Physical Science Q3 flashcard

Front

What should not be worn in a laboratory?

Back

Loose clothing, Dangling jewelry, Sandals

Front

If a laboratory fire erupts, immediately

Back

Notify your instructor

Front

What must be done with long hair in the laboratory?

Back

Pulled back and kept entirely out of the way

Front

Approved eye protection devices (such as goggles) are worn in the laboratory

Back

at all times when working with chemicals, glassware, or other objects that put your eyes at risk

Front

Horseplay or practical jokes during a lab are

Back

Always against the rules

Front

Which of the equations below are balanced? Na + O2 --> Na2o, NaCl --> Na + Cl2, 2Na + MgF2 --> 2NaF + Mg, K + Cl2 --> KCl

Back

2Na + MgF2 --> 2NaF + Mg

Front

Which principal states that during a chemical reaction matter is not created or destroyed?

Back

Conservation of Mass

Front

In the equation 2H2(g) + O2(g) --> 2H2O(l) the g stands for

Back

gas

Front

How many Hydrogen and Oxygen atoms are in the formula Ca(C2H3O2)2?

Back

6 Hydrogen, 4 Oxygen

Front

What are the reactants in the equation below? N2 + 3H2 -> 2NH3

Back

N2 + 3H2