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larisa [96]
3 years ago
9

Flocabulary circulation

Chemistry
1 answer:
Anastasy [175]3 years ago
3 0

Answer: the system of blood, blood vessels and the heart that carries blood throughout the body

Explanation: i hope this helps

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C2H6 is an example of what? a)iron b)element. c)atom. d)compound
Rama09 [41]
C2H6 is a chemical compound
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3 years ago
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PH of 0,035M HCl? How to count if your calculator hasn't got -lg?
IrinaK [193]

<u>Given information:</u>

Concentration of HCl = 0.035 M

<u>To determine:</u>

pH of the solution

<u>Explanation:</u>

Hydrochloric acid, HCl is a strong acid. It will completely dissociate to give H+ and Cl- ions

HCl → H+ + Cl-

Hence the concentration of H+ = Cl- = 0.035M

Now, pH measures the strength of H+ ions in a given solution. It is expressed as:

pH = -log[H+]

pH (HCl) = -log(0.035) = 1.46

Ans: pH of 0.035M HCl is 1.46

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3 years ago
وزن الملي مكافئ لحامض الخليك​
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Answer:

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Explanation:

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3 0
3 years ago
How many molecules are in 42.3g sample of water
Helga [31]

Answer:

The number of molecules is 1.4140*10^24 molecules

Explanation:

To know the number of molecules, we need to determine how many moles of water we have, water has molar mass of 18.015g/mol

This means that one mole of water molecules has a mass of 18.015g.

42.3g * 1 mole H2O/18.015g

= 2.3480 moles H2O

We are using avogadros number to find the number of molecules of water

2.3480 H2O * 6.022*10^ 23moles/ 1mole of H2O

That's 2.3480 multiplied by 6.022*10^23 divided by 1 mole of H2O

Number of molecules = 1.4140 *10^24 molecules

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Year/ Distance (cm)
luda_lava [24]

Answer:

the answer is C

Explanation:

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3 years ago
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