Chemistry » Page 76

Chemistry

Adison Holland

Which mineral would most likely be found in a necklace

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Chemistry

Madison Cardenas

How do you determine the number of atoms in a model of a compound

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Chemistry

Gavyn Crane

What is the rate of acceleration of a 2,000-kilogram truck if a force of 4,200n is used to make it start moving forward?

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Chemistry

Casey Friedman

How much energy is needed to warm 13.0 milligrams of water at 1.0 degrees Celsius to 75.00 degrees Celsius. Is this process endothermic or exothermic

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Chemistry

Brenton Farrell

With what volume of 5.00 M HF will 4.72 g of calcium hydroxide react completely, according to the following reaction? 2HF + Ca (OH) 2 → CaF2 + 2H2O

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Chemistry

Alisa Owens

How many molecules of nitrogen gas are in 22.4 L?

A. 6.022 * 10^22

B. 6.022 * 10^23

C. 6.022 * 10^24

D. 6.022 * 10^25

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Chemistry

Pookie

Is salt a covalently bonded

molecule

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Chemistry

Guest

What mass of excess reactant remains at the end of the reaction if 90.0 g of so2 are mixed with 100.0 g of o2? 2so2 + o2 → 2so3?

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Chemistry

Jovanni

How many hydrogen bonds can CH2O make to water?

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Chemistry

Dorian Burke

If the pressure exerted by a gas at 27.0 c in a vessel of volume 0.050 L is 4.00 atm, how many moles of the gas are pressure?

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Chemistry

Ahmad Abbott

If sulfur dioxide and oxygen can be made into sulfur trioxide, what is the reverse reaction?

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Chemistry

Sophia Hess

During her summer vacation, Sherry decides to go to the park to do some rollerblading (1). While rollerblading, she leaves her purse in her car (2). When comes back to her car, she realizes her lips are very dry (3). To remedy this, she gets her lip balm out of her purse (4). When she takes the cap off to apply it, some of it drips out of the tube and makes a mess all over her hands (5). A little irritated, she then goes to the bathroom and cleans the lip balm off of her hands (6).

Which sentence from the scenario best shows Sherry's lack of understanding about the physical properties of her lip balm?

Note: Each number represents the sentence that comes before it in the scenario.

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Chemistry

Elliott Warner

What is the main tool that scientist use

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Chemistry

Eva Gallegos

How do you know that melting ice is a physical change?

Use words to describe what energy is

What type of energy causes a rain puddle to disappear on a sunny day?

A plumber uses a torch to heat a copper pipe in order to bend it. Is this an example of a physical change? Explain

Compare the properties of broken and unbroken glass. Explain why breaking glass is a physical change.

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Chemistry

Lance Rich

Which best describes indented writing in a forged document

A. Pressing upon the paper to make writing on papers beneath

B. Changing characters with ink of a similar color

C. Covering the original text with a material

D. Eliminating the original text or signature with a razor blade

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