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3 years ago

what will happen to the electric force between two identical negative charges as they move closer together

Chemistry

1 answer:

podryga [215]3 years ago

7 0

Answer:

Like charges repel each other; unlike charges attract. Thus, two negative charges repel one another, while a positive charge attracts a negative charge.

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__________ are composed of two or more covalently bonded atoms.

polet [3.4K]

Answer:

i think it is molecules.

Explanation:

4 0

3 years ago

Read 2 more answers

When 0.103 g of Zn (s) is combined with enough HCl to make 50.0 mL of solution in a coffee cup calorimeter, all of the zinc reac

lbvjy [14]

Answer:

$\Delta H_{rxn}=162940 J/mol$

Explanation:

To calculate the heat of reaction we need to determine:

The heat produced
The moles of Zn that reacted

Moles of zinc (Zn)

It says that the 0.103 g reacted completely, knowing that the Zn molecular weight is 65.4 g/mol:

$n_{Zn}=\frac{0.103g}{65.4 g/mol}=1.57*10^{-3}mol$

Heat released by the reaction

The solution goes from 22.5 °C to 23.7°C:

$Q=Cp*\rho *V*(T_f - T_i)$

$Q=4.18 \frac{J}{g* ^{\circ}C}*1.02 g/mL*50mL*(23.7-22.5)^{\circ}C$

$Q=255.8 J$

Heat of reaction

$\Delta H_{rxn}=\frac{-Q}{n_{Zn}}$

$\Delta H_{rxn}=\frac{-255.8 J}{1.57*10^-3}}=162940 J/mol$

7 0

3 years ago

Please help me vote you brainiest

xxTIMURxx [149]

Answer: D

Explanation: P = W/t

W = F d

When dividing, if you have a large number over a small, you get a large number. We want a small number, so we want the opposite for our P : W/ t formula. We want a small Work and a large time.

Right off the bat, the two with the least time aren't right then.

From there, we can estimate how much work it would take using the W = F d equation. If there is a small distance, there is less work, which is what we want to achieve a small work over large time.

So, the choice with the most time and the least distance should be correct.

3 0

2 years ago

In which layer of the atmosphere can you find meteors?

asambeis [7]

The answer would be d :)

5 0

2 years ago

The Density of pure carbon in Diamond form is 3.52 g/cm^3. How many cubic inches would 23.7 moles of pure diamond occupy?

Vedmedyk [2.9K]

Answer : The volume of pure diamond is $0.493inch^3$