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morpeh [17]
3 years ago
9

Which statement is true for every compound? THIS QUESTION IS WORTH 39 POINTS H.E.L.P

Chemistry
1 answer:
Dima020 [189]3 years ago
3 0

Answer: D.two or more elements are chemically bonded

Explanation:

Compound is a pure substance which is made from atoms of different elements chemically combined together in a fixed ratio by mass.It can be decomposed into simpler constituents using chemical reactions. They have different properties as compared to their constituents. Example: water H_2O

2H_2O\rightarrow 2H_2+O_2

Element is a pure substance which is composed of atoms of similar elements.It can not be decomposed into simpler constituents using chemical reactions.Example: Copper Cu

Thus every compound is made up of two or more elements chemically bonded.

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Is a strong acid<br> a. NaC₂H₃O₂ <br> b. HC₂H₃O₂<br> c. KCl <br> d. NH₃<br> e. HCl
sammy [17]
E. HCI

Source:
The Internet
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3 years ago
Describe melting of a solid
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3 years ago
Which statement is true about a liquid but not a gas?
vovangra [49]

Answer:

I think its D

Explanation:

.........................

3 0
3 years ago
Read 2 more answers
In the diagram of a transverse wave shown, what does P represent?
Effectus [21]
L is amplitude M is wavelength and P is frequency
8 0
2 years ago
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The acid-dissociation constant of hydrocyanic acid (hcn) at 25.0 °c is 4.9 ⋅ 10−10. what is the ph of an aqueous solution of 0.0
vodomira [7]
According to the reaction equation:

and by using ICE table:

              CN-  + H2O ↔ HCN  + OH- 

initial  0.08                        0          0

change -X                        +X          +X

Equ    (0.08-X)                    X            X

so from the equilibrium equation, we can get Ka expression

when Ka = [HCN] [OH-]/[CN-]

when Ka = Kw/Kb

               = (1 x 10^-14) / (4.9 x 10^-10)

               = 2 x 10^-5

So, by substitution:

2 x 10^-5 = X^2 / (0.08 - X)

X= 0.0013

∴ [OH] = X = 0.0013 

∴ POH = -㏒[OH]

            = -㏒0.0013

            = 2.886 

∴ PH = 14 - POH

         = 14 - 2.886 = 11.11
5 0
3 years ago
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