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sesenic [268]
3 years ago
12

Assuming all the substances below have the same mass, which substance below requires the least energy to raise its temperature b

y 7oC? Use the table to help you answer the question.
A.Water
B.Gold
C.Aluminum
D.Wood

Chemistry
2 answers:
Burka [1]3 years ago
6 0

Answer:

The correct answer is D.

Explanation:

The specific heat, or also called specific heat capacity, is the energy needed to raise the temperature of 1 kg of mass by 1 degree Celsius. If we know that all the substances have the same mass, the facility to increase in 7 ºC will depend on the lower value of the specific heat. In this way, the element that requires less energy to increase 7 ºC is wood.

Have a nice day!

DiKsa [7]3 years ago
5 0

Assuming all the substances below have the same mass, which substance below requires the least energy to raise its temperature by 7oC? Use the table to help you answer the question.  

A.Water  

B.Gold  

C.Aluminum  

D.Wood


FOR ME ON APEX IT WAS "A.) WATER"

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Answer:

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7 0
3 years ago
If the freezing point of the solution had been incorrectly read 0.3 °C lower than the true freezing point, would the calculated
Dovator [93]

Answer : The molar mass of the solute would be low.

Explanation :

Formula used for depression in freezing point is:  

\Delta T_f=i\times K_f\times m\\\\T^o-T_s=i\times K_f\times\frac{w_b}{M_b}\times w_a}

where,

\Delta T_f = change in freezing point

\Delta T_s = freezing point of solution

\Delta T^o = freezing point of water

i = Van't Hoff factor

K_f = freezing point constant

m = molality

w_b = mass of solute

w_a = mass of solvent

M_b = molar mass of solute

From the formula we conclude that, when the freezing point of the solution read incorrectly that is freezing point of the solution is lower than the true freezing point then this means that change in freezing point would be high and the molar mass of the solute would be low.

Hence, the molar mass of the solute would be low.

6 0
4 years ago
Can someone help.? thanks :)​
laila [671]

Answer:

  • <u>1. Equation: 2x  + 3 = 9x - 11</u>

<u></u>

  • <u>2. Each row has 2 chairs</u>

Explanation:

The variable x represents the number of chairs in each row.

<u />

<u>1. She can form 2 rows of a given length with 3 chairs left over.</u>

Thus, she has:

number of rows  number of chairs in      chairs             number of chairs

                             each row                       left over         she has

     2                        x                                    3                      2x + 3

<u>2.  She can form 9 rows of the same length if she gets 11 more chairs.</u>

That means that she is short in 11 chairs to have 9x chairs, or that she has 11 less chairs than 9x chairs. Then she has:

  • 9x - 11

<u>3. Equation:</u>

Then, number of chairs she has is 2x + 3 and, also, 9x - 11, which allows to set the equation:

  • 2x + 3 = 9x  -11

<u>4. Solve the equation:</u>

  • 9x - 2x = 3 + 11
  • 7x = 14
  • x = 2

Therefore, each row has 2 chairs, and she has 2x + 3 = 4 + 3 = 7 chairs.

4 0
4 years ago
Particulate Electrical Forces Unit Test for Connexus, Chemistry A
pickupchik [31]

I’m sorry no one helped you with those questions. But could you please be a doll and give me the answer for the multiple-choice questions 1-15. Pleaseee I’m so desperate.?

3 0
3 years ago
Please help! Will mark brainlist if correct
Ratling [72]
1 and 2 are correct

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Explanation
The traits CAN be expressed physically
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3 years ago
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