Chemistry » Page 3

Alexander Strickland

Chemistry

How much heat is absorbed during production of 127 g of NO by the combination of nitrogen and oxygen?

N2 (g) + O2 (g) →2NO (g), ΔH = + 43 kcal/mol

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Chemistry

Which of the following is the result of the process that binds many amino acids on to another?

a. protein

b. allele

c. dna

d. rna

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Chemistry

What does the electron transport chain do to the concentration of hydrogen ions (protons) ?

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Chemistry

What is the cation name for alcl3?

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Chemistry

Moles of hydrogen gas (14)

0.00336 mol 0.00481 mol

Moles of hydrogen per g sample (n*,)

mol/g

mol/g

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Chemistry

A hurricane and a typhoon are the same thing true or false?

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Chemistry

Identify the element that chlorine forms a covalent bond with

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Chemistry

A child pulls a sled up a snow-covered hill. The child does 405 J of work on the sled. If the child walks 15 m up the hill, how large of a force must the child exert?

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Chemistry

A piece of glass with a mass of 32.50 g specific heat of 0.840 J/g*°C and an initial temperature of 115 °C was dropped into a calorimeter containing 57 g of water (specific heat 4.184 J/g*°C). The final temperature of the glass and water in the calorimeter was 119.2 °C. What was the initial temperature of the water?

39.84°C

79.68°C

119.84°C

139.68°C

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Deangelo Chambers

Chemistry

Which of the following is the most likely description of the product or products of a double-displacement reaction?

A) one new compound

B) two new compounds

C) oxygen and energy

D) one new compound and an element

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Chemistry

A balloon is filled with 12L of air at a pressure of 2 atm. What is the volume of ballon if the pressure is changed to 3 atm?

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Chemistry

What ionic bond occurs between what particles?

A. Two Negative Ions

B. A positive and negative ion

C. Two positive ions

D. Two neutral atoms

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Chemistry

Which of the following are good traits of a hypothesis? it will be able to be tested

it can predict an outcome

it will explain the observations

all of these

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Broderick Harvey

Chemistry

What is the mass of a box of nails

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Chemistry

In a phase change of water between the liquid and the gas phases, 770.1 kJ of energy was released by the system. What was the product, and how much of it was formed in the phase change? (dа ta: H₂O (l) → H₂O (g) ΔH = 44.01 kJ/mol.) A. 315g of water vapor was produced. B. 17.5 g of water vapor was producedC. 17.5 mol of water vapor was produced. D. 17.5 mol of liquid water was produced. E. 17.5 g of liquid water was produced.

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