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3 years ago

What do you plan to do this weekend ! ( Giving out Branliest ) <3

Chemistry

1 answer:

Lelu [443]3 years ago

8 0

Answer:

Go to the pool , Bake, sleep, Watch ,Movies, go out with my freinds<3

Explanation:

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In a chemical reaction, the mass of the products is equal to __. 11

Deffense [45]

The answer for that is 16, math right?

7 0

3 years ago

Which is an example of an exothermic process?

LUCKY_DIMON [66]

I think it's E. heating of water

Because exothermic process discharges heat, causing the temperature of the prompt environment to rise

Please correct me if I'm wrong!! I'd be happy to fix it!! :)

6 0

4 years ago

A 45-g aluminium spoon(specific heat 0.80 / J/gdegree Celsius) at 24 degree celsius is placed in 180 ml(180 grams) of coffee at

Vlad [161]

Explanation:

a) The amount of heat released by coffee will be absorbed by aluminium spoon.

Thus, $heat_{absorbed}=heat_{released}$

To calculate the amount of heat released or absorbed, we use the equation:

$Q=m\times c\times \Delta T=m\times c\times (T_{final}-T_{initial})$

Also,

$m_1\times c_1\times (T_{final}-T_1)=-[m_2\times c_2\times (T_{final}-T_2)]$ ..........(1)

where,

q = heat absorbed or released

$m_1$ = mass of aluminium = 45 g

$m_2$ = mass of coffee = 180 g

$T_{final}$ = final temperature = ?

$T_1$ = temperature of aluminium = $24^oC$

$T_2$ = temperature of coffee = $85^oC$

$c_1$ = specific heat of aluminium = $0.80J/g^oC$

$c_2$ = specific heat of coffee= $4.186 J/g^oC$

Putting all the values in equation 1, we get:

$45 g\times 0.80J/g^oC\times (T_{final}-24^oC)=-[180 g\times 4.186J/g^oC\times (T_{final}-83^oC)]$

$T_{final}=80.30^oC$

80.30 °C is the final temperature.

b) Energy flows from higher temperature to lower temperature.Whenever two bodies with different energies and temperature come in contact. And the resulting temperature of both bodies will less then the body with high temperature and will be more then the body with lower temperature.

So, is our final temperature of both aluminium and coffee that is 80°C less than initial temperature of coffee and more than the initial temperature of the aluminum.

8 0

3 years ago

What volume does .0685 mol of gas occupy at STP? 1mole =22.4

GuDViN [60]

V = nRT/P
V = 0.685 mol*(.0821 L*atm/K*mol)*273 K/1 atm

4 0

3 years ago

Read 2 more answers

Stells [14]

Answer:

40%

Explanation:

Calculate the percent of the mass that is carbon:

$\% mass = \frac{80}{200} \times 100 = 40\%$

7 0

3 years ago