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natali 33 [55]
4 years ago
15

What does sand, silt and clay come from? (A) weathered rocks. (B) The wind

Chemistry
2 answers:
Bumek [7]4 years ago
7 0
A. weathered rocks, the wind makes no sense
nata0808 [166]4 years ago
7 0
Weathered rocks is the answer
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umka2103 [35]
22 Newton’s to the right but I’m not to sure make sure to check other answers!
5 0
4 years ago
A susbtance has an empirical formula of CrO2 and a molecular weight of 168 g/mol. determine the molecualr formula for this subst
Sunny_sXe [5.5K]

Answer:

Cr_{2} O_{4}

Explanation:

\frac{molecular weight}{molar mass} =  \frac{168}{83.99} =  2.00

CrO_{2} x 2 = Cr_{2} O_{4}

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2 years ago
What particles are affecting by strong nuclear forces?
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Answer:

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I hope this helps :)

Explanation:

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3 years ago
A particular reactant decomposes with a half‑life of 109 s when its initial concentration is 0.280 M. The same reactant decompos
Sophie [7]

Answer:

The order of reaction is 2.

Rate constant is 0.0328 (M s)⁻¹

Explanation:

The rate of a reaction is inversely proportional to the time taken for the reaction.

As we are decreasing the concentration of the reactant the half life is increasing.

a) For zero order reaction: the half life is directly proportional to initial concentration of reactant

b) for first order reaction: the half life is independent of the initial concentration.

c) higher order reaction: The relation between half life and rate of reaction is:

Rate = \frac{1}{k[A_{0}]^{(n-1)}}

Half life =K\frac{1}{[A_{0}]^{(n-1)} }

\frac{(halflife_{1})}{(halflife_{2})}=\frac{[A_{2}]^{(n-1)}}{[A_{1}]^{(n-1)} }

where n = order of reaction

Putting values

\frac{109}{231}=\frac{[0.132]^{(n-1)}}{[0.280]^{(n-1)}}

0.472=(0.472)^{(n-1)}

Hence n = 2

halflife=\frac{1}{k[A_{0}]}

Putting values

231=\frac{1}{K(0.132)}

K = 0.0328

4 0
3 years ago
3. A sample of air in a syringe exerts a pressure of 1.02 atm at 22.0°C. The syringe is placed in a boiling-water bath at 100.0°
inysia [295]

Answer:

0.214 mL    

explanation:

8 0
3 years ago
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