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nlexa [21]
3 years ago
11

PLZ HELP!!!

Chemistry
1 answer:
BartSMP [9]3 years ago
5 0

Convert to grams to moles, convert g of water to litres, divide moles by litres = M

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HELP ASAP PLEASE <br> How many moles are there of a 7 M solution with a volume of 16.70 liters?
joja [24]

moles = 7*1000/16.70

= 419.16

5 0
4 years ago
The activation energy of a certain uncatalyzed biochemical reaction is 50.0 kJ/mol. In the presence of a catalyst at 37°C, the r
rodikova [14]

Answer:

E₁ ≅ 28.96 kJ/mol

Explanation:

Given that:

The activation energy of a certain uncatalyzed biochemical reaction is 50.0 kJ/mol,

Let the activation energy for a catalyzed biochemical reaction = E₁

E₁ = ??? (unknown)

Let the activation energy for an uncatalyzed biochemical reaction = E₂

E₂ = 50.0 kJ/mol

    = 50,000 J/mol

Temperature (T) = 37°C

= (37+273.15)K

= 310.15K

Rate constant (R) = 8.314 J/mol/k

Also, let the constant rate for the catalyzed biochemical reaction = K₁

let the constant rate for the uncatalyzed biochemical reaction = K₂

If the  rate constant for the reaction increases by a factor of 3.50 × 10³ as compared with the uncatalyzed reaction, That implies that:

K₁ = 3.50 × 10³

K₂ = 1

Now, to calculate the activation energy for the catalyzed reaction going by the following above parameter;

we can use the formula for Arrhenius equation;

K=Ae^{\frac{-E}{RT}}

If K_1=Ae^{\frac{-E_1}{RT}} -------equation 1     &

K_2=Ae^{\frac{-E_2}{RT}} -------equation 2

\frac{K_1}{K_2} = e^{\frac{-E_1-E_2}{RT}

E_1= E_2-RT*In(\frac{K_1}{K_2})

E_1= 50,000-8.314*310.15*In(\frac{3.50*10^3}{1})

E_1 = 28957.39292  J/mol

E₁ ≅ 28.96 kJ/mol

∴ the activation energy for a catalyzed biochemical reaction (E₁) = 28.96 kJ/mol

8 0
3 years ago
The reaction described in part a required 3.77 l of magnesium chloride. what is the concentration of this magnesium chloride sol
katrin [286]
Assuming you are talking about the atomic mass of magnesium chloride
M = n/V
M = 1/3.77
M = .265


6 0
3 years ago
Sally adds 3.13 moles of argon to a 5.29 liter balloon that already contained 4.21 moles of argonWhat is the volume of the ballo
lara31 [8.8K]
11.89, I hope this helped:)

8 0
3 years ago
Which two organisms contain chloroplasts and eyespots?
arsen [322]
 there are more to this than just two of those. the answer is volvox and euglena
5 0
4 years ago
Read 2 more answers
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