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Chemistry

Barney

An object was measured by a worker as 14.6 cm long, however, the manufacturer specifications list the length of the object at 14.4 cm. What is the percent error in the workers measurement

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Chemistry

Elianna Meza

Does The human brain retains more information than all the books in the Library of Congress

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Chemistry

Amiyah Sampson

Will an object with a density of 0.97 g/ml float or sink in water

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Chemistry

Calhoun

Which subatomic particle contributes least to the mass of the atom? which subatomic particle contributes least to the mass of the atom? neutron electron proton all of these contribute equally?

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Chemistry

Stacy Short

2H2S (g) 2H2 (g) + S2 (g)

Kc = 1.67 * 10 ^-7 at 800 C

A 0.500 L reaction vessel initially contains 0.0125 mol of H2S at 800 C. Find the equilibrium concentrations of H2 and S2.

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Chemistry

Guest

An atom has an atomic number of 9 a mass number of 19 and an electron configuration of 2-6-1 explain why the number of electrons in the second and third shells shows that this is in an excited state

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Chemistry

Eden Dixon

How can a chemical reaction be sped up? Pack in more of the reactant to increase the_.

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Chemistry

Jerimiah Acosta

How does a mixture of benzoic acid and benzaldehyde can be isolated separately by extractions?

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Chemistry

Maren Haynes

What is a compound?

a) a combination of two or more substances that are not chemically combined

b) a combination of two or more elements that are combined in a certain ratio

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Chemistry

Raquel Sullivan

A gas has a volume of 75mL at a pressure of 200.0 kPa. What will be the new volume be in mL if the pressure is decreased to 60.0 kPa in sig figs

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Chemistry

Angelina

Give two reasons why it's important to work with a partner in a lab

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Chemistry

Brady Leonard

Suppose you have 3.00*1018 reams of lead (pb). how many lead atoms do you have? express the number of atoms numerically.

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Chemistry

Kassidy Good

Why is a chemical indicator added to the flask in which a titration will occur?

to show when enough base has been added

to determine the starting pH of the solution

to neutralize the acid before adding the base

to identify the starting volume of acid

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Chemistry

Tate Bonilla

Mathematically define heat capacity

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Chemistry

Bambi

Based on what you read on the Marie Curie and the Science of Radioactivity website, name the scientists who shared the Nobel Prize in Physics in 1903 and describe their contributions that were recognized by the award.

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