4 years ago

PLS HELP!!! ASAP

Chemistry

1 answer:

mina [271]4 years ago

7 0

Answer: The answer is Fossil A is younger than the index fossil.

Explanation: Because it’s the newest layer

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The melting and boiling points of quartz are very high because of the compound’s ____________________.

makvit [3.9K]

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3 years ago

The normal range of the pH of blood is between 7.35 and 7.45; variations beyond this range have significant health implications.

patriot [66]

Answer:

The hydrogen ion concentrations associated with these pH value 7.35 is $4.5\times 10^{-8} M$

The hydrogen ion concentrations associated with these pH value 7.45 is $3.6\times 10^{-8} M$ .

Explanation:

To calculate the pH of the solution, we use the equation:

$pH=-\log[H^+]$

We are given:

1) pH = 7.35

Putting values in above equation, we get:

$7.35=-\log[H^+]$

$[H^+]=4.467\times 10^{-8} M\approx 4.5\times 10^{-8} M$

The hydrogen ion concentrations associated with these pH value 7.35 is $4.5\times 10^{-8} M$

2) pH = 7.45

Putting values in above equation, we get:

$7.45=-\log[H^+]$

$[H^+]=3.548\times 10^{-8}M \approx 3.6\times 10^{-8} M$

The hydrogen ion concentrations associated with these pH value 7.45 is $3.6\times 10^{-8} M$ .

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3 years ago

No. free poijnts ,,,,,,,

arsen [322]

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What is an investigation which all conditions are controlled

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help me please. Can you please explain to me how to solve them? you can also send me a photo if that's better for you. thanks al

zheka24 [161]

Refer to the attachment

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3 years ago