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Orlov [11]
3 years ago
4

How many grams are 7.00 x 1022 molecules of NaOH?

Chemistry
1 answer:
Taya2010 [7]3 years ago
3 0

Answer:

Answer: 46.5 g. Explanation: 6.022*10^23 molecules = 40 g. 7.00*10^23 = 40*7.00*10^23/6.022*10^23 g = 46.5 g.

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The molar mass of I2 is 253.80 g/mol, and the molar mass of NI3 is 394.71 g/mol. How many moles of I2 will form 3.58 g of NI3?
Nat2105 [25]
To answer the problem above first we need to find the difference of molar mass of NI3 from I2, 394.71 g/mol - 253.80 g/mol = 140.91 g/mol. Knowing the molar mass of the difference of NI3 from I2, in equation mass (g) / moles (mol) = molar mass, then we substitute. 3.58g / moles = 140.91 g/mol.
moles = 3.58 / 140.91 = 0.025 moles.
6 0
4 years ago
Which one would be expected to happen? If one of the buffers that contribute to pH stability in human blood is carbonic acid (H2
vredina [299]

Answer:

The correct answer is option C.

Explanation:

H_2CO3+H_2O\rightleftharpoons HCO_3^{-} + H_3O^+

On increasing the pH of the blood the hydronium ions concentration will decrease which will result in decrease in concentration of hydronium ions at the equilibrium state of hydrogen carbonate.

Le-Chatelier's principle:

This principle states that if there is any change in the variables of the reaction, the equilibrium will shift in the direction to minimize the effect.

According to Le-Chatelier's principle , on decrease in a concentration of the product the equilibrium moves in forward correction to re-establish itself.

So, on increasing the pH, the hydronium ions concentration will decrease which results in disassociation of more hydrogen carbonate to maintain the pH of the blood.

Hence, the correct answer is option C.

5 0
3 years ago
What is chemistry? ​
kirill [66]

Answer:the branch of science which examines the material of the universe and changes that these materials undergo

Chemistry deals with composition,structure,properties of matter and changes that these materials undergo

3 0
3 years ago
MARKING BRAINLIEST!
Marina CMI [18]

Answer:

3

Explanation:

The velocity is basically the speed + the direction of an object put into one quantity, <em><u>velocity</u></em>.

hope this helps, if not see me in the comments...

HOPE THIS HELPS BRAINLIEST PLZZ

4 0
3 years ago
You have a board, wood blocks, and a toy car. Your goal is to build a ramp that sends the car as far across the floor as possibl
lakkis [162]

Answer:

<h3><u><em>The board should be placed at about an 80-88 degrees angle. </em></u></h3>

<u><em>Explanation:</em></u>

<u><em>This will speed the car up and increase its speed as going down the ramp.</em></u>

5 0
3 years ago
Read 2 more answers
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