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alexira [117]
2 years ago
5

Which of the following statements best describes why electrons

Chemistry
1 answer:
Lubov Fominskaja [6]2 years ago
5 0

Answer: Electons and protons have similar charges, and are therefore attracted to one another... I think

Explanation:

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How many moles of NaOH must be dissolved in 1.00 L of water to make NaOH (aq) with a pH of 12.2?
adelina 88 [10]

Answer:

1.58 102 mol

Explanation:

I just looked it up on Quizlet.

6 0
3 years ago
The concentration of 1130+ in a solution is found to be 1.75 X 10-8 M 250C. Find [OH].
const2013 [10]

Answer:

[OH] = 6.31 * 10^-7 M

Explanation:

Mathematically;

pH + pOH = 14

Mathematically;

pH = -log [H3O+]

also;

pOH = -log [OH]

From the question; [H3O+] = 1.75 * 10^-8 M

pH = -log [1.75 * 10^-8]

pH = 7.76

since pH is normally given to 1 decimal place

we can say pH = 7.8

Now;

pH + pOH = 14

pOH = 14-7.8

pOH = 6.2

now pOH = -log [OH]

[OH] = -antilog 6.2

[OH] = 6.31 * 10^-7 M

5 0
3 years ago
How many moles of steric acid are contained in 0.25 ml of a hexane solution containing 5.4 x 10^-4 g stearic acid/l?
san4es73 [151]
First, we determine the mass of stearic acid in the solution by multiplying the given concentration by the volume. 
                      mass of stearic acid = (5.4 x 10^-4 g/L) (0.25 mL) (1000 mL/1L)
                                                          = 0.135 g
Then, we divide this amount by the molar mass in order to obtain the number of moles of stearic acid. The molar mass of stearic acid is 284.4772 g/mol.
                   moles stearic acid = 0.135 g / (284.4772 g/mol)
                                                    = <em>4.75 x 10^-4 mol</em>
3 0
3 years ago
Read 2 more answers
Suppose of barium acetate is dissolved in of a aqueous solution of ammonium sulfate. Calculate the final molarity of barium cati
ollegr [7]

Explanation:

Let us assume that the given data is as follows.

   mass of barium acetate = 2.19 g

   volume = 150 ml = 0.150 L    (as 1 L = 1000 ml)

   concentration of the aqueous solution = 0.10 M

Therefore, the reaction equation will be as follows.

        Ba(C_{2}H_{3}O_{2})_{2} \rightarrow Ba^{2+} + 2C_{2}H_{3}O^{-}_{2}

Hence, moles of C_{2}H_{3}O^{-}_{2} = 2 \times Ba(C_{2}H_{3}O_{2})_{2}  .......... (1)

As,   No. of moles = \frac{mass}{\text{molar mass}}

Hence, moles of Ba(C_{2}H_{3}O_{2})_{2} will be calculated as follows.                          

     No. of moles = \frac{mass}{\text{molar mass}}  

                          =  \frac{2.19 g}{255.415 g/mol}   (molar mass of Ba(C_{2}H_{3}O_{2})_{2} is 255.415 g/mol)            

                       = 8.57 \times 10^{-3}

    Moles of C_{2}H_{3}O^{-}_{2} = 2 \times 8.57 \times 10^{-3}

                          = 0.01715 mol

Hence, final molarity will be as follows.

              Molarity = \frac{\text{no. of moles}}{volume}

                             = \frac{0.01715 mol}{0.150 L}

                             = 0.114 M

Thus, we can conclude that final molarity of barium cation in the solution is 0.114 M.

5 0
3 years ago
Which refers to the rate of change in velocity?
jek_recluse [69]

Answer:

Acceleration

Explanation:

Acceleration Is the rate change in velocity

5 0
3 years ago
Read 2 more answers
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