Electrically neutral atoms of the same element must

A. contain the same number of neutrons

B. have the same mass number

C. contain the same number of protons

D. have equal numbers of protons and neutrons

A neutral salt is formed by which type of reaction? A. strong acid-weak base B. strong acid-strong base C. weak acid-strong base D. weak acid-weak base

What's difference between "formula unit" and "molecule"?

Why are flash floods so dangerous?

The specific heats of two natural substances are shown in the table. Specific Heat Natural Substance Specific Heat Granite 0.79 J/g °C Nickel 0.44 J/g °C A slab of granite and a slab of nickel are placed next to each other on a sunny day.

Which of the following are physical rather than chemical properties of hydrogen gas (H2) ? Check all that applya. H2 gas does not conduct electricity. b. Liquefied H2 boils at a very low temperature (-253.7oC) c.

How many hydrogen atoms are in one molecule of c2h2?

Given the recipe: 2 cups flour + 1 egg + 3 oz blueberries → 4 muffins If you have 9 cups of flour, 4 eggs and plenty of blueberries, the theoretical yield of muffins is 16. A) True B) False

Where energy store at the end in a lighting candle

Which of the following does not describe a characteristic of carbon

What are the reactants in burning waste? What products are obtained from burning waste?