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Margarita [4]
4 years ago
6

I need help please:(

Chemistry
1 answer:
VMariaS [17]4 years ago
5 0

Answer: B) Each oxygen atom has an atomic number of 8.

Explanation:

According to the periodic table, oxygen has the atomic number of 8. Also, the oxygens share their characteristics and do not differ just because they are in a compound.

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According to datons atomic theory
grin007 [14]

Answer: Dalton's atomic theory proposed that all matter was composed of atoms, indivisible and indestructible building blocks. While all atoms of an element were identical, different elements had atoms of differing size and mass.    ==INFORMATION IS FROM Google NOT MY CONTENT!!!== Your fellow Brainly user, GalaxyGamingKitty

4 0
3 years ago
What is the ph of a 0.006 m koh solution? 1. 11.78 2. 7.00 3. 2.22 4. 8.88 5. 5.12?
Stels [109]
The concentration of OH⁻ is first converted to pOH bu using followinf formula,

                                           pOH  =  -log [OH⁻]
Putting value,
                                           pOH  =  -log (0.006)

                                           pOH  =  2.221
As we know,
                                   pH + pOH  =  14
Solving for pH,
                                   pH  =  14 - pOH
Putting value of pOH,
                                   pH  =  14 - 2.221

                                   pH  =  11.779
Result:
           Option-1
is the correct answer.
4 0
3 years ago
Find the pH of a 0.350 M aqueous benzoic acid solution. For benzoic add. Ka = 6.5 x 10^-5.
slava [35]

Answer:

correct option is (a)

The solution would be using this: C6H5COOH = H+ + C6H5COO Ka = 6.5 x 10^-5 = (H+)(C6H5COO-) over

(C6H5COOH)

Let X = moles per liter (H+) and also = moles per liter (C6H5COO-)

Ka = 6.5 x 10^-5 = (X)(X) over .350 molar = acid solution 6.5 x 10^-5 = X^2 over .350

X^2 = 6.5 x 10^-5 times .350 which = 2.275 x 10^-5

x = V2.275 x 10^-5

X = 1.5083 x 10^-5 moles per liter H+

pH = -log(H+) = -log 1.5083 x 10^-5 which

= 4.6215

7 0
3 years ago
1. Suppose the mechanical advantage of a machine is 4, and the input force is 20 N.
Contact [7]

Answer:

80 N

Explanation:

you can multiple

force equal to mass x gravity

3 0
3 years ago
Look at the diagram. What number needs to be added to balance the equation?
suter [353]

Answer:

2

Explanation:

because hydrogen is a diatomic element, so it can't be just H

4 0
3 years ago
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