Chemistry » Page 139

Chemistry

Zoey

5. How are compounds different from mixtures?

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Chemistry

Guest

Which statement about the density of warm water is most likely correct?

Warm water is more dense than cold water.

Warm water is less dense than cold water.

The density is the same for warm and cold water.

The density will sometimes be higher for warm water and other times higher for cold water.

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Chemistry

Andres Keller

Sodium ions are used by your body every time you move a muscle. The difference between the Na + ions and atomic Na is that A) ionic sodium has one more electron. B) atomic sodium has one more electron. C) atomic sodium has one fewer electron. D) ionic sodium is only found in the body.

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Chemistry

Valeria Spencer

In which equation does the term "heat" represent heat of fusion?

(1) NaCl (s) + heat - - >NaCl (l)

(2) NaOH (aq) + HCl (aq) - - >NaCl (aq) + H2O (l) + heat

(3) H2O (l) + heat - - > H2O (g)

(4) H2O (l) + HCl (g) - - >H3O + (aq) + Cl - (aq) + heat

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Chemistry

Karson Solomon

What is the pH of a 5.4 x 10-3 M HCl solution?

A. 2.3

B. 3.3

C. 3.7

D. 11.7

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Chemistry

Nathen Moses

Explain how the four states of matter differ at the molecular level

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Chemistry

Lewis Bryan

Aluminum and iron (II) oxide combine to form iron and aluminum oxide.

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Chemistry

Makayla Day

What is typically displayed on the x-axis of a solubility curve? Select one of the options below as your answer:

a. grams of solvent per 100 grams of water

b. grams of solute per 100 grams of water

c. the temperature of the solution

d. the temperature of the solute

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Chemistry

Maren Barker

How many subunits make up the final quaternary shape of the potassium channel?

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Chemistry

Erik Mitchell

Pepsi

Vinegar

Orange Juice

What property do all three of these common household substances have in common?

A) They are all acidic.

B) They all taste bitter.

C) They all have a pH above 7.

D) They all turn litmus paper blue.

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Chemistry

Domino

What is the central atom of C2H4Br2

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Chemistry

Desmond Carrillo

What is the difference between the development patterns of a chicken and a monkey? A) A monkey develops gill arches while a chicken does not. B) A monkey develops a notochord while a chicken does not. C) A monkey develops an umbilicus while a chicken does not. D) A monkey develops a shell breaker while a chicken does not.

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Chemistry

Charlee Morrow

A chemist combines iodoethane (ch3ch2i with sodium hydroxide (naoh in an aqueous solution at 100°c. which change to the reaction will least affect the organic product that forms?

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Chemistry

Carlo Escobar

How many suns are there?

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Chemistry

Ariana Swanson

Calculate the mass of water produced when 2.06 g of butane reacts with excess oxygen.

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