Using the periodic table, complete the following.

Element: hydrogen

symbol: H2

Molecular weight:

Mass of one mole:

g/mol

Two liquids are shaken together in a test tube to produce a uniform liquid that does not separate into layers. Which of the following best describes the behavior of the above pair of substances? soluble insoluble miscible immiscible

Are soft drink, solder and air homogeneous or heterogeneous?

Looking at the following equation, what coefficient should be placed in front of the H2? Fe + H2SO4 - -> Fe2 (SO4) 3 + H2

Kevlar is a synthetic polymer that was marketed for the first time in 1971. It is difficult to cut and does not shrink when exposed to cold temperature. It will not rust or corrode, and it can be immersed in water without being affected.

Explain, in terms of electrons, why the radius of a potassium atom is larger than the radius of a potassium ion in the ground state.

In which of the following reactions will Kc = Kp? In which of the following reactions will Kc = Kp? (A) SO3 (g) + NO (g) ↔ SO2 (g) + NO2 (g) (B) 2 N2 (g) + O2 (g) ↔ 2 N2O (g) (C) 4 NH3 (g) + 3 O2 (g) ↔ 2 N2 (g) + 6 H2O (g) (D) 2 SO2 (g) + O2 (g) ↔ 2

Which tool is most suitable for a chemist to measure the mass of a liquid

What is the equation adheres to the law of conservation of matter

What ironic contrast does Vonnegut include in this scene? George tells his wife to forget sad things, but readers would expect George and Hazel to want to remember their son.

When the Sun is in its maximum solar cycle, which of the following occurs? A. One CME is produced every five days B. There is an unpredictable amount of energy C. Up to three CMEs are created in one day D. Protons and neutrons accelerate