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KengaRu [80]
3 years ago
8

A box is measured to be 23 cm by 45 cm by 38 cm. What is its volume in cubic meters?

Chemistry
1 answer:
mina [271]3 years ago
3 0
Answer:
39.33m^3

Explanation:
23x45x39=39330

39330/1000= 39.33
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Find the energy required to melt the copper once it's reached the melting point.
belka [17]
The answer has to depend on the mass of the copper that you're trying to melt. 

But there is a formula which you can calculate the energy required if you have the information of the mass. This formula requires the value called specific latent heat of fusion, which is the energy required to melt or freeze a specific mass of copper without changing its temperature but change its state. 
E = m l_{f}
E is the total energy required, m is the mass, and lv is the specific latent heat of fusion of copper. 

Usually, in questions, lv is given. But we can also look it up online which is around 205kJ kg^-1 
this means, to melt or freeze a copper, we need to work the mass multiplied by 205kJ in order to calculate its total energy needed or released. 
8 0
3 years ago
2. When 400 J of heat is added to 5.6 g of olive oil at 23*C, the temperature increases to 87*C. What is the specific heat of th
Maksim231197 [3]

Answer:

The answer to your question is C = 1.116 J/g°C

Explanation:

Data

Q = 400 J

mass = 5.6 g

Temperature 1 = T1 = 23°C

Temperature 2 = T2 = 87°C

Specific heat = C = ?

Formula

Q = mC(T2 - T1)

- Solve for C

C = Q / m(T2 - T1)

- Substitution

C = 400 / 5.6 (87 - 23)

- Simplification

C = 400 / 5.6(64)

C = 400 / 358.4

- Result

C = 1.116 J/g°C

7 0
4 years ago
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sp2606 [1]

Answer:

??? why did you add hehehehe?

Explanation:

6 0
3 years ago
Silver nitride is formed when a silver cation that has a 1+ charge combines with a nitrogen anion that has a 3- charge. Write th
eimsori [14]
Silver's chemical symbol is Ag, and it has a 1+ charge. Nitrogen's chemical symbol is N, and it has a 3- charge. For silver and nitrogen to form a compound, their charges must cancel out to zero. Therefore, we would need 3 silver atoms for each nitrogen atom to balance the charges out. The formula for the silver nitride compound would be Ag3N.
3 0
3 years ago
Consider a solution that contains 0.274 M potassium chloride and 0.155 M magnesium chloride.
solong [7]

Answer:

Concentration of chloride ions = 0.584M

Explanation:

The step by step calculations is shown as attached below.

3 0
4 years ago
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