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Scorpion4ik [409]
3 years ago
15

A 23.7 g piece of iron at 54.9°C is cooled and releases 338 J of heat. The specific heat of iron is 0.450 J/g°C.

Chemistry
2 answers:
ohaa [14]3 years ago
8 0

Answer:

The heat capacity and the specific heat are related by C=cm or c=C/m. The mass m, specific heat c, change in temperature ΔT, and heat added (or subtracted) Q are related by the equation: Q=mcΔT. Values of specific heat are dependent on the properties and phase of a given substance.

Explanation:

olya-2409 [2.1K]3 years ago
5 0

Answer:

23.2 degrees c

Explanation:

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How many atoms are there in 3.559*10^-6 mol of krypton?
algol [13]

Answer:

The answer is

<h2>2.143 \times  {10}^{18}  \:  \: atoms</h2>

Explanation:

To find the number of atoms given the number of moles we use the formula

N = n × L

where

N is the number of entities

n is the number of moles

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question

n = 3.559 \times  {10}^{ - 6}  \: mol

Substitute the values into the above formula and solve

That's

<h3>N  = 3.559 \times  {10}^{ - 6}  \times 6.02 \times  {10}^{23}  \\  = 2.1425 \times  {10}^{18}</h3>

We have the final answer as

<h3>N  = 2.143 \times  {10}^{18}  \:  \: atoms</h3>

Hope this helps you

3 0
4 years ago
What is the only type of mixture that has particles that dissolve and are transparent
ratelena [41]
A solution


Explanation: A solution is always transparent, light passes through with no scattering from solute particles which are molecule in size.
6 0
3 years ago
Arrange the events in the life of a star in correct order
bazaltina [42]

Stellar nebula, star, red giant, planetary nebula and then a white dwarf.

3 0
4 years ago
Read 2 more answers
During the action potential of a neuron, which ion is primarily crossing the membrane during the depolarization phase, and in wh
Zigmanuir [339]

Answer:

C. Na⁺ is entering the cell.

Explanation:

In the depolarization phase, the permeability of sodium ions (Na⁺) increases, allowing a large flow of sodium ions to enter the cell through the membrane by simple diffusion.

This process causes intracellular liquids to be <u>positively</u> charged due to the large amount of cations.

5 0
3 years ago
Need answer ASAP!! The specific heat capacity of metal A is twice that of metal B. Based on
AURORKA [14]

Answer:

last choice

Explanation:

Specific heat of a metal is    j/kg-c

It says nothing about melting point or heat of fusion

A = twice B   =  2 * j/kg-c       B = j/kg-c

 if   j is constant and mass is the same we can write this more like

    A = 2 /C       and    B = 1/C

  or    A ~  C/2      and   B~  C

now you can see that the temp change in A   will be 1/2   that of B

4 0
2 years ago
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