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balandron [24]
3 years ago
8

A water molecule is made of two atoms of hydrogen and one atom of oxygen, as shown in the image. one red sphere attached to two

white spheres Which phrase best describes the image? A. a molecule of water B. a model of a water molecule C. a base unit of water D. scientific notation for water
Chemistry
1 answer:
ira [324]3 years ago
5 0

Answer:

model of water

Explanation:

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PH is 7.45. Calculate value of [H3O+] and [OH-]
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Answer:

The answer is (H30+) =3,55e-8M and (OH-)=2,82e-7M

Explanation:

We use the formulas:

pH= - log(H30+)  and Kwater=(H30+)x(OH-)

pH= - log(H30+)  ----< (H30+)= antilog- pH=antilog- 7,45=3,55E-8M

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PLS I NEED HELP give me examples of an atom
Ugo [173]

Answer:

Neon (Ne)

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Argon (Ar)

Iron (Fe)

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Plutonium (Pu)

F-, a fluorine anion.

Explanation:

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At 25 ∘C the reaction CaCrO4(s)←→Ca2+(aq)+CrO2−4(aq) has an equilibrium constant Kc=7.1×10−4. What is the equilibrium concentrat
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Answer:

2.67 × 10⁻²

Explanation:

Equation for the reaction is expressed as:

CaCrO₄(s)    ⇄      Ca₂⁺(aq)         +        CrO₂⁻⁴(aq)

Given that:

Kc=7.1×10⁻⁴

Kc= [Ca^{2+}][CrO^{2-}_4]

Kc= [x][x]

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7.1×10⁻⁴ =  [x²]

x = \sqrt{7.1*10^{-4}}

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3 years ago
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