3 years ago

I need help with Ap Chemistry.

Chemistry

1 answer:

polet [3.4K]3 years ago

7 0

Whats your question

Explanation:

You might be interested in

How is wavelength measured (Select all that apply. from the trough (bottom) of one wave to the trough of the next wave

mr Goodwill [35]

Answer:

The first two

5 0

3 years ago

Read 2 more answers

In a calorimeter, the equilibrium temperature of copper in water is determined. if the water is replaced with a liquid that has

Feliz [49]

The equilibrium temperature will increase

4 0

3 years ago

A cubic piece of platinum metal (specific heat capacity = 0.1256 J/°C･g) at 200.0°C is dropped into 1.00 L of deuterium oxide ('

polet [3.4K]

Answer:

$a=5.65cm$

Explanation:

Hello,

In this case, for this heat transfer process in which the heat lost by the hot platinum is gained by the cold deuterium oxide based on the equation:

$Q_{Pt}=-Q_{Deu}$

We can represent the heats in terms of mass, heat capacities and temperatures:

$m_{Pt}Cp_{Pt}(T_f-T_{Pt})=-m_{Deu}Cp_{Deu}(T_f-T_{Deu})$

Thus, we solve for the mass of platinum:

$m_{Pt}=\frac{-m_{Deu}Cp_{Deu}(T_f-T_{Deu})}{Cp_{Pt}(T_f-T_{Pt})} \\\\m_{Pt}=\frac{-1.00L*1110g/L*4.211J/(g\°C)*(41.9-25.5)\°C}{0.1256J/(g\°C)*(41.9-200.0)\°C} \\\\m_{Pt}=3860.4g$

Next, by using the density of platinum we compute the volume:

$V_{Pt}=\frac{3860.4g}{21.45g/cm^3}\\ \\V_{Pt}=180cm^3$

Which computed in terms of the edge length is:

$V=a^3$

Therefore, the edge length turns out:

$a=\sqrt[3]{180cm^3}\\ \\a=5.65cm$

Best regards.

6 0

3 years ago

Sort the images based on whether there’s a force of attraction or repulsion between the magnets shown.

balandron [24]

Answer: Heres the answers

Explanation:

6 0

3 years ago

If an isotope of an element has 40 neutrons and a mass number of 79, how many electrons must it have?

34kurt

Answer: 39 electrons

Explanation: Subtract 79 by 40 to get the atomic number (amount of protons) which is 39. The number of electrons must be the same as the number of protons if it's not an ionic compound so the amount of electrons is the same amount of protons.

5 0

3 years ago

I need help with Ap Chemistry.​

I need help with Ap Chemistry.