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Anika [276]
2 years ago
10

I need help with 1-4 can someone help me?

Chemistry
1 answer:
Viktor [21]2 years ago
8 0

Explanation:

Density = mass/volume

1. Work out the density of ethanol and benzene

Ethanol - mass = 3.9 g and volume = 5 mL

Density = mass/volume =3.9/5=0.78g/mL

Benzene - mass=4.4g and volume = 5 mL

Density = mass/volume = 4.4/5=0.88g/mL

So Benzene is more dense

2. Density=mass/volume=25/7-2=5g/mL

The reason why the volume of the object is 7mL - 2mL is because the amount of displaced water is the volume of the object

3. For the Bohr Model, google the image of it.

Protons are positive charged

Neutrons are neutral

Electrons are negative charged

4. Main difference is the location of the electron in the atom.

Bohr Model : electrons orbits the nucleus in fixed paths

Electron cloud model: only the electron's probable location is determined

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Gas Law- please help!!!
jekas [21]

The pressure of the carbon dioxide will be 0.09079 atm.

<h3>What is partial pressure?</h3>

The pressure exerted by the individual gas is known as partial pressure.

The partial pressure is given as

\rm P_{Total} = P_1 + P_2 + ...

In a mixture of carbon dioxide and oxygen, 40.0% of the gas pressure is exerted by oxygen.

If the total pressure is 115 mmHg.

The total pressure in atm will be

P = 115 mmHg

P = 0.15132 atm

We have

\rm P_T \ \  \  = P_{O_2} + P_{CO_2}\\\\0.15132 \ \  = 0.4 \times 0.15132 +P_{CO_2}\\\\ P_{CO_2} = 0.09079\ atm

Then the pressure of the carbon dioxide will be 0.09079 atm.

More about the partial pressure link is given below.

brainly.com/question/13199169

#SPJ1

8 0
2 years ago
A compound is found to contain 42.88 % carbon and 57.12 % oxygen by weight. To answer the questions, enter the elements in the o
Ipatiy [6.2K]

Answer:

The empirical formule is CO

Explanation:

Step 1: Data given

Suppose the mass of a compound is 100 grams

Suppose the compound contains:

42.88 % C = 42.88 grams C

57.12 % O = 57.12 grams O

Molar mass C = 12.01 g/mol

Molar mass O = 16.0 g/mol

Step 2: Calculate moles

Moles = mass / molar mass

Moles C = mass C / molar mass C

Moles C = 42.88 grams / 12.01 g/mol

Moles C = 3.57 moles

Moles O = 57.12 grams / 16.0 g/mol

Moles O = 3.57 moles

Step 3: Calculate the mol ratio

We divide by the smallest amount of moles

C: 3.57 moles / 3.57 moles = 1

O: 3.57 moles / 3.57 moles = 1

The empirical formule is CO

3 0
2 years ago
What is the formula for titanium (I) dichromate?
MaRussiya [10]
The answer is TI(Cr207)2
8 0
2 years ago
Which chemical out of the following 4 is the most dangerous? Glucose, benzene,acetone, ether
Lelechka [254]

Answer:

B.

Explanation: hope this helps

Benzene

5 0
1 year ago
What mass of hydrogen is required to react with 24.7 g of nitrogen?
yaroslaw [1]

Answer:

10.80 g of H2

Explanation:

As per the equation, let us calculate the mole ratio. N2+3H2→2NH3. As per the equation one mole of nitrogen

8 0
2 years ago
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