3 years ago

Which of the following planets has a gaseous surface?

Chemistry

2 answers:

san4es73 [151]3 years ago

4 0

Answer:

Saturn

Explanation:

Tresset [83]3 years ago

3 0

The correct answer is Saturn

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44.8% of a 250. mL acid solution is used in an experiment, what volume of acid (in mL) was used?

postnew [5]

Answer:

112 mL

Explanation:

The formula for percent by volume is

$\text{Percent by volume} = \dfrac{\text{Volume of solute}}{\text{Volume of solution}}\times 100 \, \%$

If you have 250 mL of a solution that is 44.8 % v/v,

$\begin{array}{rcl}44.8\, \% & = & \dfrac{\text{Volume of solute}}{\text{250 mL}}\times 100 \, \%\\\\44.8 \times \text{ 250 mL} & = & \text{Volume of solute} \times 100\\\text{Volume of solute} & = & \dfrac{44.8 \times 250\text{ mL}}{100}\\\\ & = & \textbf{112 mL}\\\end{array}$

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3 years ago

Which best represents a homogeneous mixture of an element and a compound.

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Answer:

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Marat540 [252]

Answer:

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3 years ago

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A flask contains a mixture of hydrogen gas and water vapor at STP. If the pressure of the water vapor is 19.5 mmHg, then what is

horrorfan [7]

Answer:

I would say A but not sure

Explanation:

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3 years ago

What is the molarity of a 2.0 liter solution containing 58 grams of nacl?

Savatey [412]

First, need to know the formula of Molarity.
moles of solute
Molarity = ---------------------------
liters of solution

Given
2.0 liter of solution
58 grams of NaCl

Base of my research the moles of 58 grams of NaCl is 0.750 moles

Solution

0.750 moles
Molarity = ----------------------- = 0.375
2.0 L

The molarity of this solution is 0.375

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4 years ago