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natta225 [31]
3 years ago
9

26.9 square centimeters is equivalent to how many square feet?

Chemistry
2 answers:
Tanzania [10]3 years ago
8 0
The answer is :

0.029 square feet
Scrat [10]3 years ago
6 0

Answer: 0.029 ft

Explanation:

1cm3 = 0.00108ft2

26.9cm3 = 26.9 x 0.00108 = 0.029ft2

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The substances below are listed by increasing specific heat capacity value. Starting at 30.0 °C, they each absorb 100 kJ of ther
JulijaS [17]

The heat change is related to specific heat as

Heat change = mass of substance X specific heat X change in temperature

So if we are considering same amount of substance

and we are starting with the same temperature

the change in temperature will be inversely proportional to the specific heat

higher the specific heat lower the temperature change

Thus the change in temperature will be least for the substance with highest specific heat.

Answer: Hydrogen

4 0
3 years ago
Calculate the concentration, in moles per litre, of a solution formed when 13.0 g of calcium hydroxide is dissolved in 5.0 L. Pl
vichka [17]

Answer: The concentration, in moles per litre, of a solution formed when 13.0 g of calcium hydroxide is dissolved in 5.0 L is 0.036 M

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

Molarity=\frac{n}{V_s}

where,

n = moles of solute

V_s = volume of solution in L

moles of Ca(OH)_2 = \frac{\text {given mass}}{\text {Molar mass}}=\frac{13.0g}{74g/mol}=0.18mol

Now put all the given values in the formula of molality, we get

Molarity=\frac{0.18}{5.0L}=0.036M

Therefore, the concentration, in moles per litre, of a solution formed when 13.0 g of calcium hydroxide is dissolved in 5.0 L is 0.036 M

8 0
3 years ago
Write the name for the IONIC compound that contains two aluminum atoms and three sulfur atoms. (Need help ASAP)
Arada [10]
Ionic compound
Al +3 charge, Aluminum
S -2 charge, Sulfur

Al2S3
6 0
3 years ago
Each of the given statements describes a type of column chromatography. Match the statements to the type of chromatography they
vlada-n [284]

Answer:

The proper matching is given below.

Explanation:

a Separate molecules by size    size exclusion chromatography

b Separate molecules by charge Ion exchange chromatography

c The stationary phase has a covalently bound group to which a protein in the mobile phase can bind.                  Affinity chromatography

d uses mobile phase and stationary phase to separate protein Size exclusion chromatography

e The stationary phase contain  cross linked polymers with different pore size

                                                                  Size exclusion chromatography

f can separate molecules based on protein ligand binding   Affinity chromatography

g The stationary phase may contain negatively or positively charged groups

  ion exchange chromatography            

6 0
3 years ago
Is cobalt 60 more dangerous than bananas ( potassium 40) and why ?
maxonik [38]

Answer:

To the best of my knowledge, it is because of the amount of gamma rays is given off.

Explanation:

While both are isotopes, Potassium 40 gives off fewer gamma rays compared to Cobalt 60. Potassium 40 isn't really harmful to humans, but Cobalt 60 (I believe) is used in chemotherapy.

7 0
4 years ago
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