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andreyandreev [35.5K]
4 years ago
11

Science question down below

Chemistry
1 answer:
Sergio039 [100]4 years ago
8 0
It's the last one the answer is the last one
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What is the mass, in grams, of a sample of 6.98 × 1024 atoms of magnesium (Mg)? Show your work or explain the steps that you use
CaHeK987 [17]

Hello!

* First Step: to know Avogrado's Law

We know that by the Law of Avogrado, for each mole of substance we have 6.02*10²³ atoms, if:

** Second Step: to know the molar mass of the solute

The molar mass of of magnesium = 24.30 g/mol

*** Third step: make the ratio mass / mol with atoms

1 mol we have 6.02*10²³ atoms

1 mole of Mg we have 24.30 g

Then we have:

24.30 g ------------- 6.02*10²³ atoms

x ----------------------- 6.98*10^24 atoms

\dfrac{24.30}{x} = \dfrac{6.02*10^{23}}{6.98*10^{24}}

multiply cross

6.02*10^{23}*x = 24.30*6.98*10^{24}

6.02*10^{23}\:x = 1.69614*10^{26}

x = \dfrac{1.69614*10^{26}}{6.02*10^{23}}

\boxed{\boxed{x \approx 281.75\:grams}}\end{array}}\qquad\checkmark

I Hope this helps, greetings ... DexteR! =)

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3 years ago
1. What is the name of the covalent compound CCl4?2. What is the name of the covalent compound N2O5?
mr_godi [17]

Answer:

It's carbon tetrachloride.

It's Dinitrogen Pentoxide.

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the sun makes it evaporate quicker if it is there for longer

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100 points! Please help, will name brainliest. Thank you :)
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Answer and Explanation:

We need to remember the formulas:

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When given the concentration of OH-, denoted as [OH-], we can plug that value into the equation pOH = -log[OH-] to find the pOH. Once we have found the pOH, we can then subtract that value from 14 to determine the value of pH.

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What are the three parts of nucleotide
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The three parts of the nucleotide building block of DNA are the sugar, the base and the phosphate.

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