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HACTEHA [7]
3 years ago
5

The five boxes below represent a geologic cross-section with five layers that represent the rocks as they would from when earth'

s atmosphere was developing (A is on top and E is on the bottom). Label the cross section with the appropriate rock from the word bank below. Then, explain your answer in relation to the history of the earth's atmosphere.
Chemistry
1 answer:
quester [9]3 years ago
7 0

Answer:

A Limestone Layers

B Banded Iron formations

C Metaphoric rocks with fine grains  

D Red Beds

E Chert Layers

Explanation:

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What volume of a concentrated HCl solution, which is 36.0% HCl by mass and has a density of 1.179 g/mL, should be used to make 4
geniusboy [140]

Answer:

5.195 ml

Explanation:

Dissociation of HCl yields;

HCl(aq)   ⇄   H⁺(aq)     +    Cl⁻(aq)

∴ [HCl] = [H⁺] = [Cl⁻]

pH = 1.9

= -log[ H⁺]

= 10^{-pH}

= 10^{-1.9}

= 0.01258 M

Moles of HCl = number of mole × volume

= 0.01258 × 4.80 L

= 0.06042 mole

Mass of HCl = number of moles of HCl  ×  Molar mass of HCl

Mass of HCl = 0.06042 mol ×  36.5 g/mol

Mass of HCl = 2.205 grams

Also, given that the density =  1.179 g/mL

Mass of HCl in the solution = 36% of the density

i.e \frac{36}{100}*1.179

= 0.4244 grams

Volume of a concentrated HCl solution needed can now be determined as;

= \frac{2.205}{0.4244}

= 5.195 ml

7 0
3 years ago
Which of the following sulfides are insoluble? Select all that apply. Select all that apply. A. sodium sulfide lead(II) B. sulfi
Yuri [45]

Answer:

b.

Explanation:

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Explanation:

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6 0
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How to determine whether an element is paramagnetic or diamagnetic?
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To determine whether an element is paramagnetic or diamagnetic, you need to examine the electron configuration of the element. If it has unpaired electrons, then the substance is paramagnetic. If the electrons are paired, then it is diamagnetic.
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