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OleMash [197]
3 years ago
15

1. Which statement is true about oxygen,

Chemistry
1 answer:
sergey [27]3 years ago
4 0

Answer:

they belong to same grop

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According to Newton’s Third Law, if someone jumps off a skateboard, the skateboard will roll backwards because -
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Answer:

for the force that sent the person forward, there is an equal force pushing back on the skateboard

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Please help me with this chemistry question, ill mark as brainliest
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All of the acid molecules in beaker 1 dissociate fully and exist as and ions. As a result, beaker 1 represents a strong acid solution. The majority of the molecules in beaker 2 are undissociated.
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3 years ago
Calculate the quotient [co32–]/[hco3–] at ph 10.75.
KATRIN_1 [288]

The chemical equation is:

<span>HCO3^    ->  H^+ + CO3^2- </span>

 

We know that the formula for Ka is:
Ka = [H^+][CO3^2-]/[HCO3^-] 


log Ka = log[H^+] + log[CO3^2-]/[HCO3^-] 
pKa = pH - log[CO3^2-]/[HCO3^-] 
log[CO3^2-]/[HCO3^-] = pH - pKa = 10.75 - 10.329 = 0.421 
<span>[CO3^2-]/[HCO3^-] = Antilog (0.421)  = 2.636 </span>

 

Answer:

<span>2.636</span>

3 0
3 years ago
What characteristic frequencies in the infrared spectrum of your sodium borohydride reduction product will you look for to deter
kkurt [141]

Answer:

A)The characteristic frequency to look out for is  1720-1740 cm-1 (for C=O) for which will disappear in the end product but initially present in the reactant.

B)Characteristic frequency  present in the infrared spectrum will be at a peak of  3300-3400 cm-1 which will be due to O-H stretch.

C)If the product is wet with water there will be no change in the infrared spectrum

Explanation:

The characteristic frequency to look out for is  1720-1740 cm-1 (for C=O) for which will disappear in the end product but initially present in the reactant.

Characteristic frequency  present in the infrared spectrum will be at a peak of 3300-3400 cm-1 which will be due to O-H stretch.

If the product is wet with water there will be no change in the infrared spectrum

5 0
3 years ago
Is Cytoplasm found in animal cells,plant cells or in both?
nataly862011 [7]

Answer:

cytoplasm is found in both plant and animal cell.

3 0
3 years ago
Read 2 more answers
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