Which two substance is a liquid at room temperature? Water, Nitrogen, Mercury, Gold

There are 6.02x10^23 atoms of Hg in 200.6 grams of Hg. calculate the mass of 4.350x10^22 atoms of Hg

What is the mass of oxygen in 3.34 g of potassium permanganate?

Match the plant/animal to its adaptation, 1. whale / thick scaly skin. 2. frog / layer of fat called blubber?

Unlike ionic bonds, covalent bonds involve the A. loss of one or more electrons from one atom to another. B. gain of one or more electrons by one atom from another. C. sharing of electrons between atoms. D.

19. What is the density of a 16.39 g sample of a liquid whose volume reads 18.00ml? This is probably simple, but my brain ain't working at 12:00 am

Organize the items listed into the proper sequence of events for gas exchange. a: O2 is transported to cells by circulatory system. b: O2 is drawn into the lungs during inhalation. c: Cells use O2 and generate CO2. d: CO2 is exhaled.

Research about the reaction of baking soda and vinegar

What mass (in mg) does 2.63 moles of nickel have? 3.56 * 105 mg 1.54 * 105 mg 2.23 * 104 mg 129 mg?

Given the propane molecule C3H8 (g) ! a) What is the balanced equation for the combustion of propane in O2? (20 pts.) b) What is the standard enthalpy change ΔH0 for the reaction at 25°C? (20 pts.

Which of the following happens during a chemical change? Check all of the boxes that apply. One atom or more changes into atoms of another element. New substances with different properties are formed. Solids, liquids, or gases may form.