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grandymaker [24]
3 years ago
12

Question 13 (1 point)

Chemistry
2 answers:
mr Goodwill [35]3 years ago
7 0

Answer 1) : Option A) Compound

Explanation : When a substance is made up of two or more atoms which are from different elements then they are called as compound. which are chemically inseparable. But if the atoms are combining with the atoms of the same element then it is called as element.

Answer 2) : Option A) Compound

Explanation : The compound is formed when atoms from different elements and get combined to form a new substance. It cannot be easily physically separated. It can be chemically separated. A molecule is formed when two or more atoms join together chemically. A compound at least two different elements.

arsen [322]3 years ago
4 0
<span>Water is formed when two hydrogen atoms bond to an oxygen atom.
When a substance is made of two or more atoms like this, we call it AN ELEMENT

 </span><span>Water is formed when two hydrogen atoms bond to an oxygen atom.
When a substance is made of two or more atoms like this, we call it A COMPOUND</span>
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A flask contains 6g hydrogen gas and 64 g oxygen at rtp the partial pressure of hydrogen gas in the flask of the total pressure
Alex

Answer:

B.3/5p

Explanation:

For this question, we have to remember <u>"Dalton's Law of Partial Pressures"</u>. This law says that the pressure of the mixture would be equal to the sum of the partial pressure of each gas.

Additionally, we have a <em>proportional relationship between moles and pressure</em>. In other words, more moles indicate more pressure and vice-versa.

P_i=P_t_o_t_a_l*X_i

Where:

P_i=Partial pressure

P_t_o_t_a_l=Total pressure

X_i=mole fraction

With this in mind, we can work with the moles of each compound if we want to analyze the pressure. With the molar mass of each compound we can calculate the moles:

<u>moles of hydrogen gas</u>

The molar mass of hydrogen gas (H_2) is 2 g/mol, so:

6g~H_2\frac{1~mol~H_2}{2~g~H_2}=~3~mol~H_2

<u>moles of oxygen gas</u>

The molar mass of oxygen gas (O_2) is 32 g/mol, so:

64g~H_2\frac{1~mol~H_2}{32~g~H_2}=~2~mol~O_2

Now, total moles are:

Total moles = 2 + 3 = 5

With this value, we can write the partial pressure expression for each gas:

P_H_2=\frac{3}{5}*P_t_o_t_a_l

P_O_2=\frac{2}{5}*P_t_o_t_a_l

So, the answer would be <u>3/5P</u>.

I hope it helps!

5 0
3 years ago
How many moles of carbon are in 25 grams of carbon
Brut [27]

Answer:

One mole of carbon would look like 25/12.01

Explanation:

Firstly, you will divide 25 by 12.01 and get 2.081598  

We know 1 mole equals the gram per atomic mass,  so one mole of carbon is 12.01 grams. In conclusion, it would look like 25/12.01.

4 0
3 years ago
Most of the volume of a gas is
Vesna [10]

Answer:

One mole of any gas has a volume of 24 dm3 or 24,000 cm3 at rtp (room temperature and pressure).

Explanation:

3 0
3 years ago
Which statement best describes comparative and descriptive investigations?
scZoUnD [109]

Answer:

They both include a question,procedure and conclusion.

3 0
3 years ago
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How is an elements outer electron configuration related to its position in the periodic table?
Umnica [9.8K]
Well, if you look at group 1 of the periodic table, you will notice a thrend. All elements in group 1 have 1 valence / outer electron. Then you look at period 2, 3, 4 and so on, you will see that the group number corresponds the number of valence/ outershell electrons. Hence, the group determines the electron(s) on the outershell.
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2 years ago
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