Chemistry
Chemistry, 13.11.2020 07:00, pullkatie

Please help with these questions ASAP will give brainlist!! CHEMISTRY 1.) A sample of nickel is heated to 95.0°C and placed in a coffee-cup calorimeter. If the 50.0 g of water in the calorimeter is initially 22.3°C and warms to 25.4°C, what mass of nickel was heated? (The specific heat of nickel is 0.444 J/°C g and water is 4.18 J/°C g.)

21.0 g

15.4 g

2.1 g

57.5 g

2.)What is the entropy change associated with the chemical reaction that occurs when iron oxide is converted to its metal form?

Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g)

Positive

Zero

Cannot be determined

Negative

3.)The ΔH of the reaction below is -575.13 kJ. Is this reaction spontaneous?

2ZnS + 3O2 + C → 2SO2 + 2Zn + CO2

It is not because the ΔH of the reaction is negative.

It is because the ΔH of the reaction is negative.

It depends on the temperature because the ΔH of the reaction is negative and the ΔS is negative.

It depends on the temperature because the ΔH of the reaction is negative and the ΔS is positive.

4.) In the cell, the hydrolysis of ATP (adenosine triphosphate) into ADP (adenosine diphosphate) and a phosphate group has a ΔG of -50 kJ/mol. The reaction to convert glucose and a phosphate group into glucose-6-phosphate has a positive ΔG, but can be coupled with ATP hydrolysis to produce a spontaneous reaction. What can you infer about the formation of glucose-6-phosphate?

ATP → ADP + P; ΔG = -50 kJ/mol

Glucose + P → Glucose-6-phosphate; ΔG = + ?

The ΔS of the reaction that converts glucose and a phosphate into glucose-6-phosphate is positive.

The ΔG of the reaction that converts glucose and a phosphate into glucose-6-phosphate has a ΔG between 0 and +50 kJ/mol.

The ΔG of the reaction that converts glucose and a phosphate into glucose-6-phosphate has a ΔG between 0 and -50 kJ/mol.

The reaction will never occur in the cell.

answer
Answers: 3

Other questions on the subject: Chemistry

image
Chemistry, 21.06.2019 16:30, hailiemanuel3461
Select the correct answer from each drop-down menu. daniel and sanya are scientists. daniel is studying whether the increasing frequency of tropical storms is affecting coastal erosion. sanya is investigating whether the discharge from industrial plants has any impact on the ph concentration of freshwater swamps in the surrounding area. which fields of science are daniel’s and sanya’s studies most closely related to? daniel’s field of study is related to science, and sanya’s field of study is related to .
Answers: 3
image
Chemistry, 22.06.2019 04:40, shanicar33500
In which environment would primary succession occur? a forest with a few remaining trees after a recent wildfire an area of exposed rock after a glacier melts away beach that is exposed to the air at low tide an abandoned baseball field in a small town
Answers: 1
image
Chemistry, 22.06.2019 10:50, jaass28
An atom of lithium-7 has an equal number of(1) electrons and neutrons(2) electrons and protons(3) positrons and neutrons(4) positrons and protons
Answers: 2
image
Chemistry, 22.06.2019 12:00, wtfcmd
1. if you have a gas at 127 degrees c, what is it's absolute temperature (kelvin)? a. 200kb. 300kc. 400kd. 500k2. if you had a gas whose absolute temperature measured 45 k, what is that temperature in celsius? a. -228 cb. -300 cc. 125 cd. 112 c
Answers: 2
Do you know the correct answer?
Please help with these questions ASAP will give brainlist!! CHEMISTRY 1.) A sample of nickel is hea...

Questions in other subjects:

Konu
Health, 10.06.2021 20:40
Konu
Mathematics, 10.06.2021 20:40
Konu
Mathematics, 10.06.2021 20:40