An exothermic reaction has a positive enthalpy (heat) of reaction. (T/F)

How many moles are equal to 1.2 x 1021 molecules of lithium?

Anthracite is a type of coal that is composed of carbon with small amounts of hydrogen, oxygen, nitrogen, and sulfur. The formula for a sample of anthracite is C 240 H 90 O 4 NS. Calculate the amount of carbon in 40.0 kg of the sample.

Which lists the substances from least to most acidic? A. ammonia, blood, milk, orange juice B. orange juice, milk, blood, ammonia C. ammonia, milk, blood, orange juice D. orange juice, blood, milk, ammonia

A solution contains 35 g of NaCl per 100 g of water at 25 ∘C. Is the solution unsaturated, saturated, or supersaturated?

The three stages of cellular respiration are Krebs cycle, lactic acid cycle, and electron transport chain electron transport chain, photosynthesis, and glycolysis glycolysis, krebs cycle, and electron transport chain glycolysis, lactic acid cycle,

True or False. When covalent bonds are formed between atoms having different electronegativities, the electrons tend to spend less time at the atom with the greater electronegativity. Such chemical bonds are called polar covalent bonds.

How many protons are in an element

Which of the following is an example of oxidation? A. Charcoal is placed on a grill and lighting fluid poured over it. B. A car gets rusty over the course of a few years. C.

The metric unit of force is the A. gram. B. kilogram. C. nanometer. D. newton.

Why can endothermic reactions be spontaneous? g?