3 years ago

Can somebody help me with the last 2. Will mark brainliest

1 answer:

6 0

First one is because they’re alternate angles and the second one is because all angles on a straight line = 180° therefore its co interior i think

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Calculate the mass of 25,000 molecules of nitrogen gas. (1 mole = 6.02 x 1023 molecules)

Ainat [17]

Hey there!

Molar mass N2 = 28.01 g/mol

Therefore:

28.01 g N2 -------------- 6.02*10²² molecules N2

( mass N2 ?? ) ----------- 25,000 molecules N2

mass N2 = ( 25,000 * 28.01 ) / ( 6.02*10²³ )

mass N2 = 700250 / 6.02*10²³

mass N2 = 1.163*10⁻¹⁸ g

Hope that helps!

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3 years ago

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Which object in the solar system is shown in the image? (15 points)

valentinak56 [21]

Answer:

its an asteroid

and it seems to be same as picture and what I knew

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3 years ago

Draw the products of the complete hydrolysis of an acetal. Draw all products of the reaction.

jolli1 [7]

Answer: the product is ketone or aldehyde

Explanation:

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Attached is the structural conversion

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4 years ago

as 100 milliliters of 0.10 molar KOH is added to 100 milliliters of 0.10 molar HCL at 298 K, the pH of the res?A. decrease to 3B

Mila [183]

Answer:

C. increase to 7.

Explanation:

Hello,

In this case, the undergoing chemical reaction is:

$KOH+HCl\rightarrow KCl+H_2O$

Thus, the molar relationship is 1 to 1, therefore, the moles are:

$n_{HCl}=0.1mol/L*0.1L=0.01molHCl\\n_{KOH}=0.1mol/L*0.1L=0.01molKOH\\$

Thus, since the entire hydrogen ions are neutralized, the pH C. increase to 7.

Best regards.

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3 years ago

True or False a chemical formula is a representation of the smallest unit of a compound?

trapecia [35]

Answer:

true. I think

Explanation:

A chemical formula shows the atoms a molecule is made of.

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3 years ago