1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ASHA 777 [7]
2 years ago
12

Calculate the energy required to heat 406.0mg of cyclohexane from 33.5°C to 38.9°C . Assume the specific heat capacity of cycloh

exane under these conditions is 1.85·J·g^−1K^−1 . Be sure your answer has the correct number of significant digits.
Chemistry
1 answer:
N76 [4]2 years ago
6 0

Answer:

Q = 4.056 J

Explanation:

  • Q = m<em>C</em>ΔT

∴ m = 406.0 mg = 0.406 g

∴ <em>C </em>= 1.85 J/g.K

∴ T1 = 33.5°C ≅ 306.5 K

∴ T2 = 38.9°C = 311.9 K

⇒ ΔT = 311.9 - 306.5 = 5.4 K

⇒ Q = (0.406 g)(1.85 J/gK)(5.4 K)

⇒ Q = 4.056 J

You might be interested in
How many moles of nitrous oxide gas (N2O) is contained in 20.0 L balloon at a pressure of 1.09 atm and a temperature of 298K? Ro
prohojiy [21]

Answer:

There are 0,89 moles of nitrous oxide gas  in the balloon.

Explanation:

We apply the formula of the ideal gases, we clear n (number of moles); we use the ideal gas constant R = 0.082 l atm / K mol:

PV= nRT ---> n= PV/RT

n= 1,09 atm x 20,0 L /0.082 l atm / K mol x 298 K

<em>n= 0,89212637 mol</em>

7 0
2 years ago
A 0.08024 M solution of NaOH was used to titrate a solution of unknown concentration of HCl. A 32.08 mL sample of the HCl soluti
iris [78.8K]

Answer:

0.08024

Explanation:

4 0
3 years ago
What is the first step in nuclear fission?
lys-0071 [83]

Answer:

energy is released

Explanation:

8 0
3 years ago
A chemist measures the energy change ?H during the following reaction:
slamgirl [31]

Answer:

Endothermic

It absorbs heat

1.20 × 10³ kJ

Explanation:

Let's consider the following thermochemical equation.

2 H₂O(l) → 2 H₂(g) + O₂(g)    ΔH = 572 kJ

Since ΔH > 0, the reaction is endothermic, that is, it absorbs heat when H₂O reacts.

572 kJ are absorbed when 36.03 g of water react. The heat absorbed when 75.8 g of H₂O react is:

75.8 g H₂O × (572 kJ/36.03 g H₂O) = 1.20 × 10³ kJ

5 0
3 years ago
What is the distance from earth to Neptune in standard notation and scientific notation.
ira [324]

Answer:

Scientific Notation: 4.45963 x 109 km (29.811 A.U.) Scientific Notation: 4.53687 x 109 km (30.327 A.U.) By Comparison: If you weigh 100 pounds on Earth, you would weigh 110 pounds on Neptune.

4 0
2 years ago
Read 2 more answers
Other questions:
  • How is alchemy different from modern chemistry?
    6·2 answers
  • Calculate the Calories per gram for each food you tested by dividing the Calorie value by the mass of the food. How do these val
    11·2 answers
  • Cameron is a doctor treating a cancer patient, Billy is an archeologist dating a vase, and Isabelle is a geologist dating a laye
    13·2 answers
  • Please help, lol :)) &lt;--------------
    8·1 answer
  • The drug labetalol has a dose of 300 mg and is administered in 300 mL of an intravenous infusion at a rate of 2 mg/min. Using an
    12·1 answer
  • How many subatomic particles are in the NUCLEUS of a neutral atom of Beryllium?
    15·2 answers
  • How many moles are equal to 89.23 g of calcium nitrate?
    6·1 answer
  • How do you describe the particles in a liquid? ​
    9·2 answers
  • PLEASE HELP FAST!!! Which is a characteristic of colloids?
    8·2 answers
  • 14. How are the molecules in oxygen gas, the molecules in hydrogen gas, and water
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!