What causes lightning?

a) thunder

b) an electric discharge

c) rising warm air

d) air masses meeting

A binary compound created by reaction of bismuth and an unknown element E contains 52.07% Bi and 47.93% E by mass. If the formula of the compound is Bi2E3, calculate the atomic mass of E.

The electrolyte of the following is: A: KCl. B: Mg (NO3) 2. C: NH4OH. D: all of the above

If a plane is traveling at 62m/s how far will the plane travel in 1.00 hours? (1 mile = 1760 yards)

If you have 1.82 x 1024 atoms of Oxygen in Oxygen Gas (O2), how many grams do you have?

In what way are Paul Robeson and Sonia Sotomayor alike? A. All the above B They both started ethnic studies programs in their hometowns. C. They are both people of color who were the first to do something in their fields. D. They are both Hispanic.

Explain why potassium and argon react together

Which indicator will be the same color in hydrochloric acid as it is in pure water? 1. methyl orange 2. phenolphthalein 3. bromcresol green

Based on your knowledge of energy resources conservation, which of the following statements is true? a) Manufacturers can increase a light bulb's energy efficiency by using technology that decreases the amount of electromagnetic energy the bulb

Ammonia (nh3 (g), hf = - 46.19 kj/mol) reacts with hydrogen chloride (hcl (g), hf = - 92.30 kj/mol) to form ammonium chloride (nh4cl (s), hf = - 314.4 kj/mol) according to this equation:

How does an electromagnet create a magnetic field