2 years ago

Sibling rivalry may occur when:

Chemistry

1 answer:

sweet [91]2 years ago

7 0

Answer:

Explanation: true

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What do hydroligists primarly study

serious [3.7K]

Answer:

The study of movement, distribution and quality of water.

Explanation:

They measure the properties of bodied of water, such as the volume of and stream flow.

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2 years ago

How do you toast a toaster?

Mama L [17]

by putting to much current through it ?

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2 years ago

Calculate the average atomic mass of boron (B), which has two isotopes: B-10 with 19.9% natural abundance, and B-11 with 80.1% a

lina2011 [118]

Answer:

The average atomic mass of boron is found to be

10.80

Explanation:

also u answered it urself

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3 years ago

(20 points) i) An absorption intensity of 1.00 (in arbitrary units) is observed for the maximum peak of the 1:2:1 triplet of the

laiz [17]

Answer:

Concentration of ethanol required = 48.476 M

Explanation:

Given that:

the absorption intensity = 1.00

Molarity of ethanol = 1M

NMR instrument used = 160 MHz

Temperature used = 300 K

The required concentration of ethanol can be determined as follows:

$= ( 1 \ M \times \dfrac{160\ MHz }{450 \ MHz}) \times \dfrac{300 \ K}{2.2\ K}$

$= ( 1 \ M \times 0.3555 ) \times136.36}$

= 48.476 M

5 0

2 years ago

What volume of sample, in mL, would be needed to make 2 mL of a 5-fold dilution? (3 significant figures needed)

natulia [17]

Answer:

0.400 mL

Explanation:

Hello, the dilution factor (in folds) is given by:

$folds=\frac{total_{volume}}{sample_{volume}}$

Thus, the sample volume with three significant figures is given by:

$sample_{volume}=\frac{2mL}{5"folds"}=0.400 mL$

Best regards.

5 0

2 years ago