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3 years ago

The nucleus of an atom holds 4 neutrons and 4 protons, how many electrons does it have

Chemistry

1 answer:

sweet-ann [11.9K]3 years ago

6 0

It has 4 electrons, because the number of protons and the number of electrons must be equal.

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Design a synthesis of acetophenone from benzene or toluene. 1275q Part 1 out of 5 Choose the best option for the nucleophile pre

Trava [24]

Answer:

A Fridiel craft catalyst will convert benzene to acetophenone.

Permanganate catalyst can be used to convert toluene to acetophenone.

Explanation:

Benzene can be reduced to acetophenone by the addition of anhydrous aluminium chloride, AlCl₃

The mechanism is as follows:

Benzene + Acetyl choloride → acetophenone

To convert toluene to acetophenone, the following steps are necessary:

Oxidation of Toluene to Benzoic acid.

This is done by refluxing toluene with alkaline potassium permanganate (KMnO₄+ Na₂CO₃).

Benzoic acid is converted to Benzoyl chloride by treating with thioyl chloride and heating at about 80 ⁰C.

Benzoyl chloride is treated with methyl lithium to form Acetophenone.

5 0

3 years ago

A sample of metal has a mass of 24.64 g, and a volume of 5.91 mL. What is the density of this metal?

dlinn [17]

Answer:

$\boxed {\boxed {\sf 4.17 \ g/mL}}$

Explanation:

We are asked to find the density of a metal. Density is the mass per unit volume. It is calculated by dividing the mass by the volume.

$\rho= \frac{m}{v}$

The mass of the metal sample is 24.64 grams and the volume is 5.91 milliliters. We can substitute these values into the formula.

m= 24.64 g
v= 5.91 mL

$\rho=\frac{24.64 \ g }{5.81 \ mL}$

Divide.

$\rho= 4.169204738 \ g/mL$

The mass measurement has 4 significant figures the volume measurement has 3 significant figures. Our answer for density must match the least number of significant figures, which is 3.

For the number we calculated, that is the hundredth place. The 9 in the thousandth place tells us to round the 6 up to a 7.

$\rho \approx 4.17 \ g/mL$

The density of this metal is approximately <u>4.17 grams per milliliter.</u>

3 0

3 years ago

What are the building block of lipids?

Novosadov [1.4K]

fatty acids

PLEASE RATE AS THE BRAINLIEST ANSWER! THANK YOU! :)

6 0

3 years ago

5. Calculate the mass in grams of 1.88 x 1024 particles of CO2?

Oksi-84 [34.3K]

Answer:

137.44g CO2

Explanation:

(1.88 × 10²⁴ / 6.02 × 10²³) × (16 + 16 + 12.01) = 137.44g

8 0

3 years ago

Carbon dioxide is a common gas produced in burning describe a test for carbon dioxide gas

TEA [102]

Answer:

burning gasoline

Explanation:

8 0

3 years ago