3 years ago

How is chemical equilibrium achieved?

Chemistry

1 answer:

just olya [345]3 years ago

7 0

Answer:

Explanation:

Equilibrium is achieved in a chemical reaction when there is a steady state with no change in concentrations.

So the answer is "When the concentrations of reactants and products are constant."

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If a gold bar is 16,000 g mass and 800 cm^3 volume what is the density?

ki77a [65]

Answer:

<h3>The answer is 20 g/cm³</h3>

Explanation:

The density of a substance can be found by using the formula

$density = \frac{mass}{volume} \\$

From the question

mass = 16,000 g

volume = 800 cm³

We have

$density = \frac{16000}{800} = \frac{160}{8} \\$

We have the final answer as

Hope this helps you

5 0

4 years ago

A 25.0 g sample of an alloy was heated to 100.0 oC and dropped into a beaker containing 90 grams of water at 25.32 oC. The tempe

elena55 [62]

Answer:

The specific heat of the alloy $C_{a} = 0.37 \frac{KJ}{Kg K}$

Explanation:

Mass of an alloy $m_{a}$ = 25 gm

Initial temperature $T_{a}$ = 100°c = 373 K

Mass of water $m_{w}$ = 90 gm

Initial temperature of water $T_{w}$ = 25.32 °c = 298.32 K

Final temperature $T_{f}$ = 27.18 °c = 300.18 K

From energy balance equation

Heat lost by alloy = Heat gain by water

$m_{a}$ $C_{a}$ [ $T_{a}$ - $T_{f}$ ] = $m_{w}$ $C_w$ ( $T_{f}$ - $T_{w}$ )

25 × $C_{a}$ × ( 373 - 300.18 ) = 90 × 4.2 (300.18 - 298.32)

$C_{a} = 0.37 \frac{KJ}{Kg K}$

This is the specific heat of the alloy.

4 0

3 years ago

2) Is an atom with 26 protons and 30 neutrons an element or an isotope?*<br> Element<br> O Isotope

NikAS [45]

Does the element have a different amount of electrons than protons?

8 0

3 years ago

Can someone please help me please?

OleMash [197]

I would say the second option

Hope this helps *smiles*

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3 years ago

Which model of the atom first introduced the idea of a nucleus?

ankoles [38]

The answer is c.) Rutherford model

5 0

4 years ago

Read 2 more answers