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Archy [21]
3 years ago
5

I need help!!! Calculating pH, pOH, [H+] and [OH-]

Chemistry
1 answer:
Advocard [28]3 years ago
4 0
Find the hydroxide ion concentration of a solution with a pOH of 5.90. To solve this, use a scientific calculator and enter 5.90 and use the +/- button to make it negative and then press the 10x key.
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What kind of bond is present in HCI? (Use the electronegativity values from
Snezhnost [94]
The answer is
D. Covalent bond
Hope this helps you have a great day.
8 0
3 years ago
Four springs are stretched to the same distance from the equilibrium position. The spring constants are listed in the table. A 2
svp [43]

Answer:

The correct option is;

X, W, Y, Z

Explanation:

The parameters given are;

Spring (S),         Spring Constant (N/m)

      W,                   24

      X,                    35

      Y,                    22

      Z,                    15

The equation for elastic potential energy, E_e, is E_e = 0.5 \times k \times x^2

The above equation can also be written as E_e =\dfrac{1}{2}  \times k \times x^2

Where:

k = The spring constant in (N/m)

x = The spring extension

Therefore, since the elastic potential energy, E_e, of the spring is directly proportional to the spring constant, k, we have the springs with higher spring constant will have higher elastic potential energy, E_e, therefore the correct order is as follows;

X > W > Y > Z

9 0
3 years ago
Mrs. Rushing fills a balloon with hydrogen gas to demonstrate its ability to burn. Which combination could she
Mars2501 [29]

Answer:

H2SO, and CaCO

Explanation:

8 0
3 years ago
Read 2 more answers
Which element has chemical properties that are most similar to those of calcium?
iris [78.8K]
I think the answer is (1) Co. Because the element of Cobalt also has 2 electrons at the outer layer which is the same as Calcium. And the outer layer is an important factor which can affect the property of an element.
3 0
3 years ago
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What is the mass of a 2.5 mole sample of MgO2
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m = n x Mr
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m = 140g
6 0
2 years ago
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