All categories

3 years ago

Question 4 4. Rubber, oxygen and paper are all made up of A. atoms B. chlorine C. carbon D. animal cells Question 5

Chemistry

1 answer:

777dan777 [17]3 years ago

8 0

A. atoms because they are all matter and matter is made up of atoms

You might be interested in

ILL GIVE BRAINLIST............ have to answer all!!!!

7nadin3 [17]

1 is seconds and meters m/s

2 is seconds and meters m/s^2

3 Newton kg/m

4 Kilograms

Hope this helps!

6 0

4 years ago

Which climate zone experiences a dry winter?

Kazeer [188]

Answer:

Continental moderate climet

4 0

3 years ago

Read 2 more answers

Determine the molality of a solution of benzene dissolved in toluene (methylbenzene) for which the mole fraction of benzene is 0

kogti [31]

Answer:

2.32 m

Explanation:

So, according to definition of mole fraction:

$Mole\ fraction\ of\ benzene=\frac {n_{benzene}}{n_{benzene}+n_{toluene}}$

Mole fraction = 0.176

Applying values as:

$0.176=\frac {n_{benzene}}{n_{benzene}+n_{toluene}}$

$0.176\times ({n_{benzene}+n_{toluene}})={n_{benzene}}$

So,

$0.176\times n_{toluene}}=0.824\times {n_{benzene}}$

${n_{benzene}}=\frac {0.176}{0.824}\times n_{toluene}}$

${n_{benzene}}=0.2136\times n_{toluene}}$

Also, Molar mass of toluene = 92.14 g/mol

Thus,

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

$Mass=92.14\times n_{toluene}}\ g$

Also, 1 g = 0.001 kg

So,

$Mass\ of\ toluene=0.09214\times n_{toluene}}\ kg$

Molality is defined as the moles of the solute present in 1 kg of the solvent.

It is represented by 'm'.

Thus,

$Molality\ (m)=\frac {0.2136\times n_{toluene}}{0.09214\times n_{toluene}}$

<u>Molality of benzene = 2.32 m</u>

3 0

3 years ago

The world's record in the 100 m dash is 9.69 seconds and in the 100 yard dash is 9.21 seconds.

Andrews [41]

Speed is equivalent to the distance traveled divided by the time it takes to travel that certain distance.
To solve this problem convert the units first from meter and yards to miles. 100 metes is 0.0621371mi and 100 yards is 0.0568182 yard. 9.69s = 0.002691667 hr and 9.21s = 0.002558333

A.) 23mi/hr
B.) 22.20mi/hr

8 0

3 years ago

Read 2 more answers

HELP ASAP

Hitman42 [59]

The human activity creating water pollution and depletion are uses of fertilizers, detergents and chloro flouro carbon many other things.

<h3>What is water pollution?</h3>

Water pollution is defined as the contamination of water bodies, usually as a result of human activity, in such a way that their lawful uses are harmed.

The activities of human that creating water pollution are:

Uses of fertilizers
Harmful chemical in agriculture
Detergents for washing clothes
Wastes from industries

And depletion in the ozone layer are due to halogen source gases, which contain chlorine and bromine atoms, are produced by human activities. These emissions into the atmosphere eventually contribute to ozone depletion in the stratosphere.

Hence human activities are uses of fertilizers, detergents and many other things.

To know more about water pollution, visit the below link:

brainly.com/question/2165740

#SPJ1

7 0

2 years ago

Question 4 4. Rubber, oxygen and paper are all made up of A. atoms B. chlorine C. carbon D. animal cells Question 5​

Question 4 4. Rubber, oxygen and paper are all made up of A. atoms B. chlorine C. carbon D. animal cells Question 5