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strojnjashka [21]
3 years ago
11

You are presented with a mystery as part of your practical experiment. You have a solution of Pb(NO3)2

Chemistry
1 answer:
shusha [124]3 years ago
7 0
Ho123 right I’m sorry of I’m wrong
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What is the pH of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 M? Show your calculation.
Nastasia [14]

Answer:

9.00  

Explanation:

Data:

[H⁺] = 1.0 × 10⁻⁹ mol·L⁻¹

Calculation:

pH = -log[H⁺] = -log(1.0 × 10⁻⁹) = -log(1.0) - log(10⁻⁹) = -0.00 - (-9) = -0.00 + 9 = 9.00

7 0
3 years ago
4. Which change to a DNA molecule would have the least effect on an organism?
Sav [38]

Answer: Change in a single nitrogen base in the DNA sequence will not have any significant effect on the organism.

So A

Explanation:

This is known as point mutation and it does not have any significant change in the protein and it is least harmful type of DNA mutation.

5 0
3 years ago
Escoge uno de los derechos de la siguiente lista que están Escogidos en el código de la niñez y adolescencia escribe en una hoja
Lera25 [3.4K]

Answer:

Hehe I don't know spanish -

Explanation:

6 0
3 years ago
What is the molarity of a solution in which 0.732 moles of hcl are dissolved in 0.975 liters of solution?
posledela
Molarity is moles divided by liters so do .732 divided by .975 liters.
6 0
3 years ago
In E. coli, the enzyme hexokinase catalyzes the reaction: Glucose + ATP → glucose 6-phosphate + ADP The equilibrium constant, Ke
kondor19780726 [428]

Answer:

Explanation:

Glucose + ATP → glucose 6-phosphate + ADP The equilibrium constant, Keq, is 7.8 x 102.

In the living E. coli cells,

[ATP] = 7.9 mM;

[ADP] = 1.04 mM,

[glucose] = 2 mM,

[glucose 6-phosphate] = 1 mM.

Determine if the reaction is at equilibrium. If the reaction is not at equilibrium, determine which side the reaction favors in living E. coli cells.

The reaction is given as

Glucose + ATP → glucose 6-phosphate + ADP

Now reaction quotient for given equation above is

q=\frac{[\text {glucose 6-phosphate}][ADP]}{[Glucose][ATP]}

q=\frac{(1mm)\times (1.04 mm)}{(7.9mm)\times (2mm)} \\\\=6.582\times 10^{-2}

so,

q ⇒ following this criteria the reaction will go towards the right direction ( that is forward reaction is favorable  until q = Keq

4 0
3 years ago
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