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yawa3891 [41]
3 years ago
5

Need help quick! 10 points for correct answer :)

Chemistry
2 answers:
ra1l [238]3 years ago
3 0

Answer:

gram to mole conversation

Elina [12.6K]3 years ago
3 0

Answer:

gram to mole conversation

Explanation:

I have taken this quiz

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Pavel [41]
Salt lowers the freezing point, and thus the melting point of the ice
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Which is one of the ecosystems found in intertidal zones?
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estuaries

Explanation:

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We apply the same amount of energy to 10.0-g samples of aluminum, iron, and silver which begin at the same temperature.
maw [93]

Answer:

Explanation:

A sound knowledge of specific heat capacity of the metals is required in this case.

The specific heat capacity of a metal is the quantity of heat required to the raise the temperature of a unit mass of it by 1°C.

It is related to quantity of heat using the expression below;

               H   =   m  c  Δt

where m is the mass

            c is the specific heat capacity

            Δt is the temperature change

let us make the specific the subject of the expression;

                     c  = \frac{H}{m x change in temperature}

we can see that there is an inverse relationship between specific heat and temperature change.

The specific heat capacity of a body is an intensive property that is unique to the metal.

   The higher the specific heat capacity, the lower the amount of temperature change in it.

Let us find the specific heat capacity of the given metals;

 Aluminium     0.897J/gK

 Iron                 0.412J/gK

 Silver               0.24J/gK

 After the heat is supplied,

      Silver >  Iron > Aluminium in terms of temperature change

 

7 0
3 years ago
What mass of dinitrogen monoxide, N2O, contains the same number of molecules as 3.00 g of trichlorofluoromethane, CCl3F?
erica [24]

Answer:

0.9612 g

Explanation:

First we <u>calculate how many moles are there in 3.00 g of CCl₃F</u>, using its <em>molar mass</em>:

  • 3.00 g CCl₃F ÷ 137.37 g/mol = 0.0218 mol CCl₃F

Now, we need to calculate how many grams of N₂O would have that same number of molecules, or in other words, <em>the same amount of moles</em>.

Thus we <u>calculate how many grams would 0.0218 moles of N₂O weigh</u>, using the <em>molar mass of N₂O</em> :

  • 0.0218 mol N₂O * 44.013 g/mol = 0.9612 g N₂O
3 0
3 years ago
A weak base. B. has a K. of 4.46 x 10-10 A solution with an unknown initial concentration is tested, and found to have a pH of 8
Ann [662]

Answer:

0.013MB

Explanation:

6 0
3 years ago
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