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4 years ago

Answer the question below based on the periodic table entry for bromine.

Chemistry

2 answers:

Ostrovityanka [42]4 years ago

8 0

Answer: Option (c) is the correct answer.

Explanation:

Mass number of an atom represents the number of protons and neutrons present in an atom. Whereas atomic number of an atom represents the number of protons.

For example, mass number of bromine is 80 g/mol and it's atomic number is 35.

That is, number of neutrons present in a bromine atom is as follows.

Mass number = Number of protons + number of neutrons

80 = 35 + number of neutrons

number of neutrons = 80 -35

= 45

Thus, we can conclude that bromine have 45 neutrons.

Shalnov [3]4 years ago

4 0

<span>The number of neutrons bromine will have are equal to
= protons + neutrons
so,
80-35=45</span>

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Balance NO + 02 -- NO2

Simora [160]

Answer:

NO + O2 -> NO2

it is balanced

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3 years ago

What is the approximate bond angle around the central carbon atom in acrolein?

Pavlova-9 [17]

Hello!

The approximate bond angle around the central carbon atom in acrolein is 120°

The structure of acrolein is shown in the figure below. From the structure, we can deduce that the central carbon atom is in an sp2 hybridization (Atoms with a double bond hybridize in an sp2 fashion).

Atoms with sp2 hybridization have trigonal planar geometry, in this kind of hybridization, bonds are oriented the farthest away possible from each other, to minimize overlapping and the angle that allows that is 120°.

Have a nice day!

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4 years ago

Read 2 more answers

Please Help!!!!!!!

hichkok12 [17]

3,1,3,1

Explanation:

Reaction equation:

HBr + Al(OH)₃ ⇒ H₂O + AlBr₃

To balance an equation we make sure that the same number of atoms appears on both sides of the expression.

HBr + Al(OH)₃ ⇒ H₂O + AlBr₃

Let us a simple mathematical method to solve this problem

aHBr + bAl(OH)₃ ⇒ cH₂O + dAlBr₃

a, b , c and d are the coefficients that will make the equation balanced;

Conserving H; a + 3b = 2c

Br; a = 3d

Al; b = d

O; 3b = c

let us make a = 1

d = $\frac{1}{3}$

b = $\frac{1}{3}$

c = 1

multiply through by 3;

a = 3, b = 1, c= 3 and d = 1

learn more:

Balanced equation brainly.com/question/9325293

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8 0

4 years ago

What is an example of a microorganism acting in a harmful way? A) Bacteria aiding digestion. B) Bacteria causing strep throat. C

vaieri [72.5K]

Not very often, but sometimes, the language gives away the question. This is one such instance.

Look at A. Is digestion a bad thing? It shouldn't be. Otherwise you run marathons with gobs of food not being broken down and providing energy.
Not A.

Not C. Do you like yogurt? If you don't do you know someone who does? Is yogurt for you/them a bad thing. Bacteria here are good. Again, not C.

Not D. Waste is bad. It's a problem. Getting rid of it is good. Again not D.

There's only one left.
B <<<< answer. Who would like to get strep throat. It's a fate for your worst enemy.

B <<<< answer.

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4 years ago

Read 2 more answers

Theresa creates an experiment where she mixes two red-colored substances together in a container and observes the solution slowl

vlada-n [284]

Complete Question:

Theresa creates an experiment where she mixes two red-colored substances together in a container and observes the solution slowly changing from red to blue for the next eight minutes. The solution becomes completely blue after eight minutes. What does this represent about the type of change happening in the container?

Group of answer choices

A. A chemical change started immediately and finished at eight minutes.

B. A non-chemical change started immediately and finished at eight minutes.

C. A chemical change occurred at four minutes.

D. A non-chemical change occurred at four minutes.

Answer:

A. A chemical change started immediately and finished at eight minutes.

Explanation:

A chemical reaction can be defined as the chemical process which typically involves the reaction between two or more chemical elements (substances) to form a new compound, through the rearrangement of the ionic or molecular structure of each chemical element.

This ultimately implies that, a chemical reaction is a chemical change that immediately starts when two or more molecules of a chemical element (substance) known as reactants are combined together to form a new product (compound).

In this scenario, Theresa creates an experiment where she mixes two red-colored substances together in a container and observes the solution slowly changing from red to blue for the next eight minutes. The solution becomes completely blue after eight minutes. Thus, what this represent about the type of change happening in the container is that, a chemical change (from red to blue) started immediately and finished at eight minutes.

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3 years ago