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
Delicious77 [7]
3 years ago
15

A 10-gram sample of zinc loses 560 J of heat and has a final temperature of 100

Chemistry
1 answer:
grandymaker [24]3 years ago
5 0
<h3>Answer:</h3>

Initial temperature is 243.59°C

<h3>Explanation:</h3>

The quantity of heat is calculated by multiplying the mass of a substance by its specific heat capacity and change in temperature.

That is; Q = m×c×ΔT

In this case;

Quantity of heat = 560 J

Mass of the Sample of Zinc = 10 g

Final temperature = 100°C

We are required to determine the initial temperature;

This can be done by replacing the known variables in the formula of finding quantity of heat,

Specific heat capacity, c, of Zinc = 0.39 J/g.°C

Therefore,

560 J = 10 g × 0.39 J/g°C × ΔT

ΔT = 560 J ÷ (3.9 J/°C)

   = 143.59°C

But, since the sample of Zinc lost heat then the temperature change will have a negative value.

ΔT = -143.59°C

Then,

ΔT  = T(final) - T(initial)

Therefore,

T(initial) = T(final) - ΔT

              = 100°C - (-143.59°C)

              = 243.59°C

Hence, the initial temperature of zinc sample is 243.59°C

You might be interested in
What is the predominant intermolecular force in the liquid state of each of these compounds: ammonia (NH3), methane (CH4), and n
MAVERICK [17]

Answer:

The  predominant intermolecular force in the liquid state of each of these compounds:

ammonia (NH3)

methane (CH4)

and nitrogen trifluoride (NF3)

Explanation:

The types of intermolecular forces:

1.Hydrogen bonding: It is a weak electrostatic force of attraction that exists between the hydrogen atom and a highly electronegative atom like N,O,F.

2.Dipole-dipole interactions: They exist between the oppositely charged dipoles in a polar covalent molecule.

3. London dispersion forces exist between all the atoms and molecules.

NH3 ammonia consists of intermolecular H-bonding.

Methane has London dispersion forces.

Because both carbon and hydrogen has almost similar electronegativity values.

NF3 has dipole-dipole interactions due to the electronegativity variations between nitrogen and fluorine.

3 0
3 years ago
How many moles are in 6.80 x 10^23 atoms <br> of gold, Au?
frosja888 [35]

Answer:

1.13 moles Au

Explanation:

Moles Au = 6.80x10²³atoms / 6.023x10²³atoms/mole = 1.13 moles Au

8 0
2 years ago
When you rub two sticks together, they get hot.
worty [1.4K]
You convert kinetic energy into thermal energy when you rub two sticks together.
6 0
2 years ago
*
NISA [10]

Answer:

B: +3

Explanation:

If Gallium loses 3 electrons, it will become an ion.

The ion will be positively charged because in this new ion, the number of electrons is lesser than the number of protons. The charge difference will impart a positive net charge on the ion.

  • In a neutral atom, the number of electrons and protons are the same.
  • For positively charged ions, the number of protons is greater than the electrons

If Gallium the loss of 3 electrons offsets the charge balance in the chemical specie. Thus, the ion will have a net +3 charge.

3 0
2 years ago
According to the MyPyramid plan, which foods should be the smallest portion of a teen’s diet?
Jobisdone [24]
The answer is GRAINS 


i realy hope this helped 


7 0
3 years ago
Read 2 more answers
Other questions:
  • How many molecules are in 1.95 moles of water?
    12·2 answers
  • Name of the the following unsaturated Hydrocarbon​
    6·1 answer
  • please help.. Which of the following events is most likely to cause an environmental disturbance in a grassland biome? A. Earthq
    6·1 answer
  • Please help asap! I need help with this, C.E.R for chemistry
    14·1 answer
  • What is the electron configuration of a ground-state Nb2+ ion? Select one: a. 1s22s22p63s23p64s23d104p65s24d1 b. 1s22s22p63s23p6
    14·1 answer
  • ILL GIVE THE BRAINLIST HELP ME ASAP
    9·1 answer
  • The volume occupied by 0.25 mol of sulfur dioxide at rtp <br>​
    6·1 answer
  • Magnesium and bisulfate<br> Formula
    13·1 answer
  • Does protecting animals so they won’t go extinct help with climate change?
    6·2 answers
  • Calculate the wavelength (in nm) of a photon emitted when an electron
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!