Chemistry » Page 93

Chemistry

What is the empirical formula of a compound that is 14 g calcium, 11g oxygen, and 0.7 g hydrogen

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Emerson Henderson

Chemistry

Why does a salt compound give off light (or a colored flame) when burned? 4. did lithium chloride and sodium chloride give off similar colors? why or why not? 5. explain what you think causes different compounds to give off different flame colors. 6. using your results, identify which substances you would put in a firework to delight a crowd of spectators?

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Chemistry

What is the conclusion made by the de broglie

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Chemistry

Write a scientific explanation explaining how the earth recycles plate materials?

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Zechariah Preston

Chemistry

In experiment 1, how many moles of benzoic acid are present? how many moles of sodium bicarbonate are contained in 1 ml of a 10% aqueous solution? (a 10% solution has 1 g of solute in 9 ml of solvent.) is the amount of sodium bicarbonate sufficient to react with all of the benzoic acid?

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Chemistry

What occurs when potassium reacts with bromine to form potassium bromide?

1) Electrons are shared and the bonding is ionic.

2) Electrons are shared and the bonding is covalent.

3) Electrons are transferred and the bonding is ionic

4) Electrons are transferred and the bonding is covalent.

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Chemistry

D. Answer the following questions in one word or a single sentence.

1. The metal foil used for wrapping food is made up of which metal

2. Which metal is used in thermometers?

3. Which non-metal is essential for breathing?

4. What is the alloy of iron, nickel and chromium known as?

5. Name the gas released when metals react with acids.

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Chemistry

Where are tidal generators located?

A. in the ocean in the deep water

B. in the ocean along the coast lines

C. in lakes

D. on the beaches

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Chemistry

Be sure to answer all parts. select the three most acidic hydrogen atoms in lactic acid, ch3ch (oh) co2h, and rank them in order of decreasing acidity. explain your reasoning.

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Chemistry

List the elements that produced the most easily identified colors?

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America Frazier

Chemistry

What is the result of mixing the two substances shown here together?

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Chemistry

Which reaction should be used to convert propene into alkyl halide

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Chemistry

What does a coefficient represent in a chemical formula? How do you use the coefficient to calculate the number of atoms in each molecule?

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Chemistry

Identify 3 physical changes that could occur with a sheet of paper

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Chemistry

What makes an acid or base strong?

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