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3 years ago

When the same or different atoms combine together, you have a:

Chemistry

1 answer:

Alex73 [517]3 years ago

3 0

Answer:

D.) molecule

<h3>When the same or different atoms combine together they for a molecule</h3>

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How is particle motion related to thermal equilibrium?

Wewaii [24]

Answer:

With billions of moving particles colliding into each other, an area of high energy will slowly transfer across the material until thermal equilibrium is reached (the temperature is the same across the material).

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3 years ago

List two characteristicts that fern,club mosses,and horse tails share

djyliett [7]

Two characteristics that they share is
True vascular tissue<span> and don't produce seeds</span>

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3 years ago

If 45.0 mL of ethanol (density = 0.789 g/mL) initially at 8.0 ∘C is mixed with 45.0 mL of water (density = 1.0 g/mL) initially a

strojnjashka [21]

Answer : The final temperature of the mixture is, $22.14^oC$

Explanation :

First we have to calculate the mass of ethanol and water.

$\text{Mass of ethanol}=\text{Density of ethanol}\times \text{Volume of ethanol}=0.789g/mL\times 45.0mL=35.5g$

and,

$\text{Mass of water}=\text{Density of water}\times \text{Volume of water}=1.0g/mL\times 45.0mL=45.0g$

Now we have to calculate the final temperature of the mixture.

In this problem we assumed that heat given by the hot body is equal to the heat taken by the cold body.

$q_1=-q_2$

$m_1\times c_1\times (T_f-T_1)=-m_2\times c_2\times (T_f-T_2)$

where,

$c_1$ = specific heat of ethanol = $2.42J/g^oC$

$c_2$ = specific heat of water = $4.18J/g^oC$

$m_1$ = mass of ethanol = 35.5 g

$m_2$ = mass of water = 45.0 g

$T_f$ = final temperature of mixture = ?

$T_1$ = initial temperature of ethanol = $8.0^oC$

$T_2$ = initial temperature of water = $28.6^oC$

Now put all the given values in the above formula, we get:

$35.5g\times 2.42J/g^oC\times (T_f-8.0)^oC=-45.0g\times 4.18J/g^oC\times (T_f-28.6)^oC$

$T_f=22.14^oC$

Therefore, the final temperature of the mixture is, $22.14^oC$

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4 years ago

Send Message

Ganezh [65]

Answer:

1 Atm

Explanation:

Dalton's law

The total pressure is 3 Atm so all you have to do is subtract the other partial pressures from 3

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3 years ago

Read 2 more answers

For each of the following, determine whether the observation is primarily a physical change or a chemical change.Explain.

Zinaida [17]

Answer:

A)Physical change

B)physical change

C)physical change

Explanation:

A) there is no new substances formed from the process, so it's still physical change

B)there is no new substances formed from the process, so it's still physical change since tea is still the substance that is formed. The color changes is still physical

C) addition of water to the tea is still the same, tea was formed. no new substances formed,

When a substance pass through a physical change, it has its composition still remains the same, it's molecules can be rearranged. There is no formation of new substance as far

physical change is concerned.

When a substance pass through a

chemical change, it has its molecular composition changed . In a chemical change there is formation of new substances.

5 0

3 years ago