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Zolol [24]
3 years ago
8

Which statement is true of the rock cycle?

Chemistry
2 answers:
o-na [289]3 years ago
6 0

Answer:

c

Explanation:

igneous, sedimentary, and metamorphic. igneous forms from molten rock cools and solidifides

SVEN [57.7K]3 years ago
6 0
The answer is B surface event include:weathering erosion and depostion
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Changing the volume increases the area that the molecules collide with so the force is spread over a larger area.

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How many centigrams are in 0.13 oz
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I think the answer is 368.544 centigrams

Explanation:

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The table lists the chemical formulas or symbols of a few common substances. Which two substances are compounds? A) aluminum and
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An analytical chemist is titrating of a solution of nitrous acid with a solution of . The of nitrous acid is . Calculate the pH
Burka [1]

Answer:

pH = 2.69

Explanation:

The complete question is:<em> An analytical chemist is titrating 182.2 mL of a 1.200 M solution of nitrous acid (HNO2) with a solution of 0.8400 M KOH. The pKa of nitrous acid is 3.35. Calculate the pH of the acid solution after the chemist has added 46.44 mL of the KOH solution to it.</em>

<em />

The reaction of HNO₂ with KOH is:

HNO₂ + KOH → NO₂⁻ + H₂O + K⁺

Moles of HNO₂ and KOH that react are:

HNO₂ = 0.1822L × (1.200mol / L) = <em>0.21864 moles HNO₂</em>

KOH = 0.04644L × (0.8400mol / L) = <em>0.0390 moles KOH</em>

That means after the reaction, moles of HNO₂ and NO₂⁻ after the reaction are:

NO₂⁻ = 0.03900 moles KOH = moles NO₂⁻

HNO₂ = 0.21864 moles HNO₂ - 0.03900 moles = 0.17964 moles HNO₂

It is possible to find the pH of this buffer (<em>Mixture of a weak acid, HNO₂ with the conjugate base, NO₂⁻), </em>using H-H equation for this system:

pH = pKa + log₁₀ [NO₂⁻] / [HNO₂]

pH = 3.35 + log₁₀ [0.03900mol] / [0.17964mol]

<h3>pH = 2.69</h3>
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3 years ago
Earth Science 10/ Chemistry 11
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Measuring the ratio of C-14 to C-12 in the remains of dead organisms to determine how much time has passed since the organism died

the answer is D

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