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Ad libitum [116K]
3 years ago
7

What is the density if a sample of rock has a mass of 69 g and a volume of 23 ml?

Chemistry
2 answers:
vodomira [7]3 years ago
5 0
Density is mass and volume so do the math and 3 grams
kiruha [24]3 years ago
4 0
Density = mass / volume

= 69g / 23 ml

= 3 g / ml.

Thus, the density of the sample is 3 grams per ml or 3g/ ml
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A concentration cell consists of two sn/sn2+ half-cells. the electrolyte in compartment a is 0.24 m sn(no3)2. the electrolyte in
Vikentia [17]
A:-      sn(s) =>  Sn +2(0.24 M) + 2e-
B:-     Sn +2 (0.87 M) +2e-  =>   Sn(s) 

solution will become more concentrated and solution B become less concentrated 

Sn(s)+ Sn +2(0.87 ) ----> Sn(s) + Sn  +2(0.24)
E  =   Eo  -   0.0592 / 2 * log   [   (0.24 / 0.87 ) ]
E  = 0.0   -   0.0592 / 2   *   log ( 0.275) 
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4 0
3 years ago
What is the volume, in liters, of 3.75 moles of O2 gas at STP?
nekit [7.7K]
1 mole ----------- 22.4 L ( at STP )
3.75 moles ----- ?

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7 0
3 years ago
Read 2 more answers
3. Could a molecule<br> contain only one atom?
Blababa [14]
A molecule is defined as two or more atoms of the same element different element that are bound together. A molecule may be homonuclear, which means, it consists of atoms of one chemical element, as with oxygen (O2); or it may be heteronuclear, a chemical compound composed of more than one element, as with water (H2O).
8 0
3 years ago
How much energy is required to melt 76.941g of ice
olga55 [171]

Answer:

Q=25.7 Kj

Explanation:

76.941 g H2O*1 mol/18.016= 4.27 Mol H20

(4.27 Mol H2O)(6.009 Kj/Mol)

Q=25.7 Kj

5 0
3 years ago
A chemist wants to calculate the amount of heat that is absorbed by a sample of copper as it is melted. Which constant should sh
34kurt

The constant used for the absorption of heat by the sample in melting is +\Delta H_{fus}.  Thus, option A is correct.

The chemical reaction has been defined as the energy in which the energy has been released or absorbed for the breaking of bonds in the reactants and the formation of product.

<h3>Constant for energy absorbed</h3>

The energy has been absorbed in the melting of the copper sample. Thus, the sample has been converted from the solid to the liquid state.

The change in energy with the conversion in solid and liquid state has been termed as heat of fusion.

The energy has been absorbed by the system, thus it has been marked with the positive sign.

Therefore, +\Delta H_{fus} has been the constant used for the absorption of heat by the sample in melting. Thus, option A is correct.

Learn more about melting sample, here:

brainly.com/question/8828503

8 0
3 years ago
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