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ololo11 [35]
4 years ago
8

In which of the following sets is the symbol of the element, the number of protons, and the number of electrons given correctly?

Chemistry
1 answer:
Maksim231197 [3]4 years ago
3 0

In, 49 protons, 49 electrons

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The type of bonding and the numbers of covalent bonds an atom can form with other atoms are determined by __________. View Avail
Dmitriy789 [7]

Answer:

The answer is: the number of unpaired valence electrons

Explanation:

The valence electrons are the number of electrons present in outer shell of an atom that participate in chemical bond formation, if the outer shell is not completely filled.

Covalent bond formation occurs when two atoms contribute one valence electron each to form a bond. Thus the number of covalent bonds that an element can form, can be determined by the number of unpaired valence electrons.

Therefore, the nature and the number of bonds formed by the element and the chemical properties of the element can be determined by the number of valence electrons present in the outer shell of the element.

4 0
3 years ago
What is the chemical composition of acid rain?
Yakvenalex [24]
The chemical formula depends on the type of acids it is. Acidic rain is a complex mixture of nitrous, nitric, sulfurous and sulfuric acids which all combine to lower the pH.
5 0
3 years ago
Type the correct answer in the box. express your answer to three significant figures. an air mattress is filled with 0.55 moles
dmitriy555 [2]

385 L is the volume of the air mattress with 0.55 moles of air inside the mattress and a temperature of 295 K.

<h3>What is an ideal gas equation?</h3>

The ideal gas law (PV = nRT) relates to the macroscopic properties of ideal gases. An ideal gas is a gas in which the particles (a) do not attract or repel one another and (b) take up no space (have no volume).

Using the gas law,

PV=nRT, where n is the moles and R is the gas constant. Then divide the given mass by the number of moles to get molar mass.

Given data:

P= 3.5 kPa

V=?

n= 0.55 moles of air

T= 295K

R= 8.314 (L kPa/mol K)

Putting value in the given equation:

V= \frac{nRT}{P}  

V = \frac{(0.55 moles)(8.314 L kPa/mol k)(295 K)}{3.5 kPa}

V = 385.4132857 L

And whatever the significant figure is asked for, for example, 3 significant figures: the answer would be 385 litres.

Hence, 385.4132857 L is the volume of the air mattress.

Learn more about the ideal gas here:

brainly.com/question/27691721

#SPJ1

5 0
2 years ago
Why is it necessary to know the temperature of the reactants and the products of a reaction in order to determine change in the
Crank

Answer:

Free Energy (G) can either increase or decrease for a reaction when the temperature increases. It depends on the entropy (S) change. The change in a quantity is represented by the Greek letter delta. ... Hence, when the temperature increases the numeric value of the free energy becomes larger.

Explanation:

6 0
3 years ago
Which step is this ?prophase I, Anaphase I, prophase II, Anaphase II
sweet-ann [11.9K]

Answer:

Prophase 1

Explanation:

4 0
3 years ago
Read 2 more answers
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