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Alex777 [14]
3 years ago
11

Are these right? U guys r the best on this app!!

Chemistry
2 answers:
Pepsi [2]3 years ago
8 0
Yes, they are right.Very good hand writing! You did a very great job on showing your work.
baherus [9]3 years ago
8 0
Yes they are your good a this
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An object has a mass of 45.0 g and a volume of 4.0 ml. what is its density?
andreev551 [17]

Answer:

The answer is

<h2>11.25 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

Density =  \frac{mass}{volume}

From the question

mass = 45 g

volume = 4 mL

Substitute the values into the above formula and solve for the density

We have

Density =  \frac{45}{4}

We have the final answer as

<h3>11.25 g/mL</h3>

Hope this helps you

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3 years ago
Which is the term for how vegetation influences precipitation?
Scilla [17]
The answer to this question is A- evaporation
3 0
3 years ago
How to tell the difference between polar and nonpolar covalent bonds?
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You need to look at the electronegativity and decide wheter the difference of both of the numbers are significant enough to form a polar bond
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3 years ago
The nonvolatile, nonelectrolyte TNT (trinitrotoluene), C7H5N3O6 (227.1 g/mol), is soluble in benzene C6H6. How many grams of TNT
Alexeev081 [22]

Answer:

Explanation:

formula of osmotic pressure is as follows

p= n RT

n is mole of solute per unit volume

If m be the grams of solute needed

m gram = m / 227.1 moles

m / 227.1 moles dissolved in .279 litres

n = m / (227.1 x .279 )

= m / 63.36

substituting the values in the osmotic pressure formula

5.14 = (m / 63.36)  x .082 x 298

m / 63.36 = .21

m = 13.32 grams .

7 0
2 years ago
1. The atoms of a certain element each contain 11 protons and 1 valence electron. Which statement correctly identifies this elem
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The answer is A. The element is sodium (Na) and is highly reactive

5 0
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