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prohojiy [21]
3 years ago
10

What is the standard unit that astronomers use to measure the size of a star

Chemistry
1 answer:
g100num [7]3 years ago
7 0
Parsecs or abbreviated pc
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Which scientist was the first to devise the rules of chemical reactions that are explained by modern atomic theory?
valina [46]

Answer:

John Dalton is the correct answer.

Explanation:

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3 years ago
Determine the formula for iron l oxide
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Fe2O is the formula for that
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Which is equal to a temperature of 50°F?<br> O 18°C<br> O 46°C<br> O 10°C<br> O 32°C
Alekssandra [29.7K]
C) 10°C

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3 years ago
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When a polypeptide is in its native conformation,there are weak interactions between its R groups. However, when it is denatured
Marina86 [1]

Answer:

In the unfolded polypeptide, there are ordered solvation shells of water around the protein

groups. The number of water molecules involved in such ordered shells is reduced when the protein

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Explanation:

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3 years ago
What is the molarity of a 0.65L solution containing 63 grams of ? The molar mass of NaCl is 58.44 g/mol
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Explanation:

The molarity of a solution is defined like the number of moles of solute per liters of solution.

molarity = moles of solute/(volume of solution in L)

We know the volume of solution in L.

volume of solution = 0.65 L

To go from the mass of our solute in grams to moles we have to use its molar mass.

mass of NaCl = 63 g

molar mass of NaCl = 58.44 g/mol

moles of NaCl = 63 g * 1 mol/(58.44 g)

moles of NaCl = 1.078 moles

Finally we can find the molarity of the solution

molarity = moles of NaCl/(volume of solution)

molarity = 1.078 moles/(0.65 L)

molarity = 1.66 M

Answer: the molarity of the solution is 1.66 M.

7 0
1 year ago
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