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3 years ago

14

Is seawater an element, compound, or mixture?

1 answer:

Ainat [17]3 years ago

4 0

It is a mixture of a variety of substances

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How much HCI exists in 275 mL of 0.83 M<br> solution of HCI?<br> Answer in units of mol.

zubka84 [21]

Answer:

0.22825mol HCl

Explanation:

$M=\frac{moles}{liters} \\$

$0.83M HCl = \frac{x(mol)}{0.275L}$

1. Cross multiply!

$\frac{0.83M}{1} =\frac{x}{0.275L}$

$x = 0.22825 mol HCl$

7 0

3 years ago

How many grams are in 4.5 x 10^22 molecules of water? please show dimensional analysis

GaryK [48]

Answer:

1.1grams

Explanation:

Find moles of water:

4.5x10^22/(6.02x10^23)=0.07mol

Find molar mass of the water

O=16.00g/mol

0.07x 16.00=1.1 grams

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3 years ago

Give "Drug X" 5.0 mg/kg per day in two divided doses. The patient weighs 53 lb . How many mg should be given per dose? How many

anygoal [31]

26.5 doses of drug it will make sense.

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3 years ago

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Which of the following is an element?

Gnesinka [82]

D. Zinc metal (zn) Zinc is a chemical element with atomic number 30.

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4 years ago

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What are the coefficients for the following chemical reaction?

Advocard [28]

Explanation:

A and D. the answer is a and d

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3 years ago