True or False? Endothermic reactions are characterized by net absorption of thermal energy from its surroundings which leads to an increase in temperature of the surroundings?

Is hydrogen a metal?

A 84.0 ml volume of gas at standard temperature is heated to 18 °C while the pressure remains constant. What is the new volume? A. 1,510 mL B. 89.5 mL C. 78.8 mL

Identify the mixture of gasoline and motor oil and suggest a technique for separating their components. 1. homogeneous; decanting 2. heterogeneous; decanting 3. heterogeneous; distillation 4. homogeneous; distillation 5.

A sample of CO2 gas has a volume of 12.0 L at STP. Calculate the number of moles of CO2 in the sample.

Eric notices that his flashlight does not turn on when he flips the switch. What is the least appropriate hypothesis for Eric to make?

How do the reaction rates change as the system approaches equilibrium?

Based on the symmetry of the molecules, which is a polar molecule? SeCl2 (bent) BeCl2 (linear) BF3 (trigonal planar) CF4 (tetrahedral) O2 (diatomic linear)

7) change 21.1 mg into grams

Why is an ionic solution a good conductor of electricity while a covalent solution is a poor conductor

How many grams of zinc metal will react completely with 8.2 liters of 3.5 M HCl? Show all of the work needed to solve this problem. Zn (s) + 2 HCl (aq) ZnCl2 (aq) + H2 (g)