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3 years ago

The picture above represents which of the following?

Chemistry

1 answer:

PSYCHO15rus [73]3 years ago

6 0

This is a plant cell because there are chloroplasts in this diagram which are present in plant cells

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Provide the missing arrows in the boxes to show how br2 is produced from nbs

Illusion [34]

Answer: -

The mechanism for Br production from NBS is shown in the attached file.

N-bromo succinimide is a reagent used to brominate. It is most commonly used in allylic bromination, where a hydrogen on a carbon adjacent to a double bond is replaced.

It is selective in nature, unaffecting the normal double bond as compared to only bromine.

It also has a low concentration of bromine as an added advantage.

5 0

3 years ago

A reaction takes place between an acid and 0.5 gram of solid magnesium ribbon. Another reaction takes place between an acid and

aliina [53]

Answer:

Explanation:

The correct answer would be that the powdered magnesium reacts faster because it has a greater surface area.

The rate of reaction is defined as the rate of disappearance of the reactants in a reaction or the rate of conversion of appearance of products during a reaction.

The rate of reaction is dependent on several factors such as the concentration of the reactants, temperature of the reaction, nature of reactants, and the presence or absence of catalysts during the reaction.

As far as the nature of reactants is concerned, the surface area of reactants comes into play. Reactants with higher surface areas react faster than reactants with lesser surface areas. Hence, powdery reactants react faster than solid reactants because the latter has a higher surface area than the former.

The correct option is A.

5 0

3 years ago

Why is our use of electric power increasing?

miv72 [106K]

Answer: leaving it on

Step by step

3 0

3 years ago

Both diamond and graphite (i.e. pencil lead) consist of carbon atoms. They are only different in their crystalline structures. O

prisoha [69]

Answer:

Moles of carbon atoms = 3.33 × $10^{-6}$ mol

No. of atoms of C in Diamond = 2.007 × $10^{28}$ atom

Atoms of graphite = 6.27 × $10^{23}$ Atoms

Explanation:

given data

Cost of 0.2g of diamond = $5000

Cost of 25 g of graphite = $ 2

solution

we know cost of 0.2g of diamond is $ 5000 so that for 1$

if buy 1$ = $\frac{0.20}{5000}$

1$ = 4.0 × $10^{-5}$ g Carbon

and Moles of carbon atoms is express as

Moles of carbon atoms = Given mass of Carbon ÷ atomic mass of C .........1

Moles of carbon atoms = 4.0 × $10^{-5}$ g/ 2.0g

Moles of carbon atoms = 3.33 × $10^{-6}$ mol

and

No. of atoms of C in Diamond = No. of moles × Avogadro NO ..............2

No. of atoms of C in Diamond = 3.33 × $10^{-6}$ mol × 6.022 × $10^{28}$

No. of atoms of C in Diamond = 2.007 × $10^{28}$ atom

Graphite

and wew have given Cost of 25 g of graphite is $2 so for but 1$ we get

for buy $1 = 25÷2 = 12.5 g Of graphite

Moles of graphite = 12.5÷12 = 1.04 mol

Atoms of graphite = 1.04 × 6.022 × 1023

Atoms of graphite = 6.27 × $10^{23}$ Atoms

6 0

3 years ago

If E=mc^2,solve for both m and c. Also, if m=80 and c=0.40 what is the value of E?

Pie

Answer:

$m = \frac{E}{c^2}$

$c = \sqrt{\frac{E}{m} }$

$E = 12.8 J$

Explanation:

Part 1: Solving for m

We are given that:

E = mc²

To solve for m, we will need to isolate the m on one side of the equation

This means that we will simply divide both sides by c²

$m = \frac{E}{c^2}$

Part 2: Solving for c

We are given that:

E = mc²

To solve for c, we will need to isolate the m on one side of the equation

This means that first we will divide both sides by m and then take square root for both sides to get the value of c

$c^2 = \frac{E}{m}\\ \\ c=\sqrt{\frac{E}{m}}$

Part 3: Solving for E

We are given that:

m = 80 and c = 0.4

To get the value of E, we will simply substitute in the given equation:

E = mc²

E = (80) × (0.4)²

E = 12.8 J

Hope this helps :)

4 0

4 years ago