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3 years ago

8

Please help with this questio

2 answers:

MAXImum [283]3 years ago

8 0

Answer:

you didnt give the question

Explanation:

fredd [130]3 years ago

8 0

Answer:

What he said☝️

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3. Nicotine, the addictive drug in cigarettes, contains 74.0% carbon, 8.6% hydrogen,

Vinvika [58]

Answer:

the mass of each element can be recovered from is 162.23 grams

Explanation:

the mass really depends on the volume. If there is 74.0% carbon, 8.6% hydrogen and 17.3% nitrogen then you first cross out the 0 and 3 which leaves you with 17% and 74%. Then all you have to do is multiply 17% and 74% and then divided it by 8.6%.

8 0

3 years ago

Which two observers would be experiencing the same apparent solar time?

Ad libitum [116K]

The observers which would experience the same apparent solar time are observer B and observer E. This means the correct response as per the full question indicated in the attached document is number 2.

<h3>Types of Solar Time</h3>

There are two types of Solar Time. They are:

Apparent Solar Time and
Mean Solar Time

<h3>What is Apparent Solar Time?</h3>

Apparent solar time refers to the time of the day that is shown by the hour angle of the sun. It is also defined as the sun's position in the sky going by direct observation. Direction observation of the sun to determine Solar Time is possible using a Sundial.

See the link below for more about Apparent Solar Time:

brainly.com/question/6336054

3 0

2 years ago

An atom contains 22 protons and 26 neutrons. What is its atomic number?

Andrej [43]

Answer:

the atomic number is 22

Explanation:

titanium is 22 on the periodic table. the amount of protons is the same as the atomic number

3 0

3 years ago

Calculate the new boiling point of a solution if 10.00 g of a non-ionizing compound (C3H5(OH)3) is dissolved in 90.00 g of H2O.

erma4kov [3.2K]

Answer:

Boiling T° of solution = 100.6

Explanation:

Formula for elevation of boiling point is:

ΔT = Kb . m . i

where ΔT means Boiling T° of solution - Boiling T° of pure solvent

Our solute is a non ionizing compound.

i = 1, because it is a non ionizing compound. i, indicates the ions dissolved in solution.

m = molality (moles of solute dissolved in 1 kg of solvent)

90 g of solvent = 0.09 kg of solvent

We convert mass of solute to moles (by the molar mass):

10 g . 1 mol /92.09 g = 0.108 moles

m = 0.108 mol /0.09 kg = 1.21 m

Let's replace data: Boiling T° of solution - 100°C = 0.51 °C/m . 1.21 m . 1

Boiling T° of solution = 0.51 °C/m . 1.21 m . 1 + 100°C

Boiling T° of solution = 100.6

5 0

2 years ago

Assuming that the bath contains 250.0 g of water and that the calorimeter itself absorbs a negligible amount of heat, calculate

Anvisha [2.4K]

Answer:

$-3272$ kJ/mol

Explanation:

Given and known facts

Mass of Benzene $= 0.187$ grams

Mass of water $= 250$ grams

Standard heat capacity of water $= 4.18$ J/g∙°C

Change in temperature ΔT $= 7.48$ °C

Heat

$=250 * 4.18 * 7.48\\=7816.6 \\=7.82$

Heat released by benzine is - 7.82 kJ

Now, we know that

$0.187$ grams of benzene release $= -7.82$ kJ heat

So, $1$ g benzine releases

$\frac{ -7.82 }{0.187}\\= -41.8$

kJ/g

$0.187 * \frac{1}{78.108}=0.00239$ mol C6H6

Heat released

$= \frac{-7.82}{ 0.00239}$

$=-3272$ kJ/mol

4 0

3 years ago