Which substance accounts for nearly 80 percent of Earth's atmosphere?

A. oxygen

B. nitrogen

C. carbon dioxide

D. argon

What is the mole fraction of 25.0 g of ethanol (c2h5oh) is added to 75.0 g of water to form 96.4 mL of solution

14. A 35.0 mL sample of argon gas has a pressure of 1.0 atm and a temperature of 150 C. What is the final volume if the pressure goes to 2.0 atm and the temperature to 450 C?

the isotope of an atom contaning 40 protons and 51 neutons suddenlyhas 2 neutrons added to it. What isotope is created?

Genital herpes is a common sti caused by

In Boston (elevation 20 feet), you step on a scale and weigh 150 pounds, using the same scale on top of Mt. Everest (elevation 29,029 feet) you would weigh A. more than in Boston B. less than in Boston C. the same as in Boston

How calculate how many milliliters of glycerin (specific gravity=1.26) will have a mass of 0.75 lbs?

Label each reactant as either a Bronsted-Lowry acid or a Bronsted-Lowry base. a. HF (aq) + H2O (l) - -> H3O + (aq) + F - (aq) HF (aq) ["Bronsted-Lowry acid", "Bronsted-Lowry base"] H2O (l) ["Bronsted-Lowry acid", "Bronsted-Lowry base"] b.

What are three conditions that can cause chemical reactions to occur?

Facts about heat absorption and simple questions about heat absorption with answer

You measure a piece of wood with a meter stick and is it exactly one meter long. How many centimeters long is it?