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
natta225 [31]
3 years ago
15

An unknown metal with a mass of 54.0 g required 773 J of energy in order to change its temperature from 63.0 C to 100.0 C. What

is the identity of this metal?
Chemistry
1 answer:
Vitek1552 [10]3 years ago
8 0

Answer:

Metal is copper.

Explanation:

Mass of a metal, m = 54 g

Heat energy required, Q = 773 J

The temperature changes from 63.0 °C to 100.0 °C.

We need to identify the metal. Heat required to raise the temperature is given by :

Q=mc\Delta T

c is specific heat of the metal

We can identify the metal by finding its specific heat.

c=\dfrac{Q}{m\Delta T}\\\\c=\dfrac{773}{54\times (100-63)}\\\\=0.386\ J/g^{\circ} C

The metal is copper. Its specific heat is 0.386\ J/g^{\circ} C.

You might be interested in
Rainforests may be located in what latitude range?
SpyIntel [72]

Answer:

near the equator where it's hot

6 0
2 years ago
A certain sample of coal contains 1.60 percent sulfur by mass. when the coal is burned, the sulfur is converted to sulfur dioxid
alina1380 [7]
<span>1.40 x 10^5 kilograms of calcium oxide The reaction looks like SO2 + CaO => CaSO3 First, determine the mass of sulfur in the coal 5.00 x 10^6 * 1.60 x 10^-2 = 8.00 x 10^4 Now lookup the atomic weights of Sulfur, Calcium, and Oxygen. Sulfur = 32.065 Calcium = 40.078 Oxygen = 15.999 Calculate the molar mass of CaO CaO = 40.078 + 15.999 = 56.077 Since 1 atom of sulfur makes 1 atom of sulfur dioxide, we don't need the molar mass of sulfur dioxide. We merely need the number of moles of sulfur we're burning. divide the mass of sulfur by the atomic weight. 8.00 x 10^4 / 32.065 = 2.49 x 10^3 moles Since 1 molecule of sulfur dioxide is reacted with 1 molecule of calcium oxide, just multiply the number of moles needed by the molar mass 2.49 x 10^3 * 56.077 = 1.40 x 10^5 So you need to use 1.40 x 10^5 kilograms of calcium oxide per day to treat the sulfur dioxide generated by burning 5.00 x 10^6 kilograms of coal with 1.60% sulfur.</span>
5 0
3 years ago
Recycling of aluminum cans is an example of A) increasing entropy is a nonspontaneous process B) decreasing entropy is a nonspon
Helen [10]

Answer:

B) decreasing entropy is a non-spontaneous process

Explanation:

3 0
3 years ago
If total pressure of multiple gases is 512 mmHg, and the pressure of oxygen gas is 332 mmHg and the pressure of carbon monoxide
deff fn [24]

Answer: 67 mmHg

Explanation:

According to Dalton's Gas Law, the total pressure of a mixture of gases is the sum of the pressure of each individual gas.

i.e Ptotal = P1 + P2 + P3 + .......

In this case,

Ptotal = 512 mmHg

P(oxygen) = 332 mmHg

P(carbon mono-oxide) = 113 mmHg

Remaining pressure (P3) = ?

To get P3, apply Dalton's Gas Law formula

Ptotal = P(oxygen) + P(carbon mono-oxide) + P3

512 mmHg = 332 mmHg + 113 mmHg + P3

512 mmHg = 445 mmHg + P3

P3 = 512 mmHg - 445 mmHg

P3 = 67 mmHg

Thus, the remaining pressure is 67 mmHg

5 0
3 years ago
Select the correct answer. What happens when an electron absorbs energy? A. The electron moves from a lower energy orbital to a
umka2103 [35]
I choose the option A.
The electron absorbs energy from specific wavelength then moving from a lower energy orbital to a higher energy orbital.
3 0
2 years ago
Other questions:
  • Why might the amount of copper produced be less than 100% of the expected amount? Check all possible reasons.
    11·2 answers
  • 5(1-8r)+8r the awnser
    8·2 answers
  • If we view a 1st quarter moon tonight , how many weeks will pass before we view the next new moon?
    12·2 answers
  • What is the molarity of a solution prepared by dissolving 0.217 mol of ethanol, C2H5OH, in enough water to make 100.0 mL of solu
    5·1 answer
  • Cindy made tea. She started with 300 grams of water at 20 degrees Celsius. She transferred 18,000 calories to the water. What wa
    11·1 answer
  • The visible spectrum of the Cr(acac)3
    13·1 answer
  • Why do strong bonds exist between water molecules?
    5·1 answer
  • Write a nuclear equation for the hypothetical fusion of a copper atom with another nucleus to make gold. Can this happen? Why or
    11·1 answer
  • Help im struggling frfr
    5·2 answers
  • E=hv h= 6.62 x 10^-34 m^2 kg/ s
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!