All categories

3 years ago

PLEASE HELP ME!

Chemistry

1 answer:

uysha [10]3 years ago

8 0

Answer:

1) reduction

2) zero

Explanation:

Let us look at the definition of oxidation and reduction in a nutshell.

Oxidation is electron loss(oxidation number is increased)

Reduction is electron gain(oxidation number is decreased)

With the above definitions in mind let us look again at the equation in question 1:

Br2 + 2e- → 2Br-

We can see that the bromine molecule gained two electrons. Oxidation number decreased from zero on the left hand side of the reaction equation to -1 on the right hand side of the reaction equation hence the equation represents a reduction half equation.

For question 2, silver was displaced from its salt. On the left hand side of the reaction equation, silver had an oxidation number of +2. But remember than one of the riles for determining oxidation number of species is that the oxidation number of an uncombined element is zero. Hence, the oxidation number of silver element on the right hand side of the reaction equation is zero.

You might be interested in

1. At room temperature, air is usually a (solid, liquid, gas).

kirza4 [7]

At room temperature the air is Gas

3 0

2 years ago

To what volume should 25ml of 15m nitric acid be diluted to prepare a 3m solution

Maurinko [17]

We can use the dilution formula to find the volume of the diluted solution to be prepared

c1v1 = c2v2

Where c1 is concentration and v1 is volume of the concentrated solution

And c2 is concentration and v2 is volume of the diluted solution to be prepared

Substituting the values in the equation

15 M x 25 mL = 3 M x v2

v2 = 125 mL

The 25 mL concentrated solution should be diluted with distilled water upto 125 mL to make a 3 M solution

6 0

3 years ago

Find the empirical formula of the following compounds:

Aneli [31]

The empirical formula of the following compounds 0.903 g of phosphorus combined with 6.99 g of bromine.

<h3>What is empirical formula?</h3>

The simplest whole number ratio of atoms in a compound is the empirical formula of a chemical compound in chemistry. Sulfur monoxide's empirical formula, SO, and disulfur dioxide's empirical formula, S2O2, are two straightforward examples of this idea. As a result, both the sulfur and oxygen compounds sulfur monoxide and disulfur dioxide have the same empirical formula.

<h3>How to find the empirical formula?</h3>

Convert the given masses of phosphorus and bromine into moles by multiplying the reciprocal of their molar masses. The molar masses of phosphorus and bromine are 30.97 and 79.90 g/mol, respectively.

Moles phosphorus = 0.903 g phosphorus $\frac{mol phosphorus}{ 30.97 g phosphorus}$ = 0.0293 mol

Moles bromine 6.99 g bromine $\frac{mol bromine}{79.90 g bromine}$ =0.0875 mol

The preliminary formula for compound is P0.0293Bro.0875. Divide all the subscripts by the subscript with the smallest value which is 0.0293. The empirical formula is P1.00Br2.99 ≈ P₁Br3 or PBr3

To learn more about empirical formula visit:

brainly.com/question/14044066

#SPJ4

8 0

1 year ago

How many chlorine ions are required to bond with one aluminum ion

Monica [59]

The answer is Three
!!!!!!

4 0

3 years ago

If liquid water is exposed to normal atmospheric pressure, what needs to change in order to change its state of matter?

inn [45]

Answer: Option (b) is the correct answer.

Explanation:

State of a substance changes when heat is provided to a substance.

This is because when we heat water then intermoleclar forces present within its molecules tend to break down. Due to this molecules start to move away from each other.

As a result, kinetic energy of molecules increases and they collide rapidly. Hence, solid state of water changes into liquid state and upon excessive heating liquid state of water changes into vapor state.

Thus, we conclude that temperature of water needs to change in order to change its state of matter.

6 0

3 years ago

Read 2 more answers