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3 years ago

Help me I hate science so much

Chemistry

2 answers:

mestny [16]3 years ago

8 0

Answer:

it would be sciemce

Explanation:

yeah because its hargf

levacccp [35]3 years ago

8 0

Its a note taking worksheet just read the chapter and follow along

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How does the numbers valence electrons in oxygen compare to the valence electrons in hydrogen?

elena-s [515]

Answer:

Determine the total number of valence electrons in the molecule or ion.

Each H atom (group 1) has 1 valence electron, and the O atom (group 16) has 6 valence electrons, for a total of 8 valence electrons

Explanation:

8 0

3 years ago

What is a solution?

Mama L [17]

The correct answer is a solute and a solvent

A solution is any homogenous mixture of two or more substances. It does not necessarily have to be liquid or gaseous.

7 0

3 years ago

A mixture of gases with a pressure of 800.0 mm hg contains 60% nitrogen and 40% oxygen by volume. what is the partial pressure o

klasskru [66]

Hello!

We have the following statement data:

Data:
$P_{Total} = 800 mmHg$
$P\% N_{2} = 60\%$
$P\% O_{2} = 40\%$
$P_{partial} = ? (mmHg)$

As the percentage is the mole fraction multiplied by 100:

 $P = X_{ O_{2} }*100$

The mole fraction will be the percentage divided by 100, thus:
What is the partial pressure of oxygen in this mixture?

$X_{ O_{2} } = \frac{P}{100}$
$X_{ O_{2}} = \frac{40}{100}$
$\boxed{X_{ O_{2}} = 0.4}$

To calculate the partial pressure of the oxygen gas, it is enough to use the formula that involves the pressures (total and partial) and the fraction in quantity of matter:

In relation to $O_{2}$ :

$\frac{P O_{2} }{P_{total}} = X_O_{2}$
$\frac{P O_{2} }{800} = 0.4$
$P_O_{2} = 0.4*800$
$\boxed{\boxed{P_O_{2} = 320\:mmHg}}\end{array}}\qquad\quad\checkmark$

Answer:
b. 320.0 mm hg

7 0

3 years ago

5. What is the volume of 10 moles of a gas at 300 K held at a pressure of 3.5 atm?

Helga [31]

70.33 L is the volume of 10 moles of a gas at 300 K held at a pressure of 3.5 atm.

<h3>What is volume?</h3>

Volume is the percentage of a liquid, solid, or gas's three-dimensional space that it occupies.

Liters, cubic metres, gallons, millilitres, teaspoons, and ounces are some of the more popular units used to express volume, though there are many others.

We will use ideal gas law to find the volume

PV = nRT

Can also be written as

V = (nRT)/P

Where,

P = pressure

V = volume

n = amount of substance

R = ideal gas constant

T = temperature

Here, we have given

P = 3.5 atm

V = to find

n = 10 moles

R = 0.08206 L⋅atm/K⋅mol

T = 300k

Lets substitute the values

V = (10 × 0.08206 × 300)/3.5

V = 70.33 L

Learn more about volume

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#SPJ10

3 0

1 year ago

Someone pls help me I will make you brain

Olegator [25]

Answer:

the second answer

Explanation:

5 0

3 years ago

Read 2 more answers

Help me I hate science so much​

Help me I hate science so much