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AnnZ [28]
3 years ago
9

What is the difference between the number of electrons in an atom of selenium,Se, and the number of electrons in an atom of alum

inum,Al?
A)21
B)17
C)8
D)14
Chemistry
2 answers:
aliina [53]3 years ago
5 0

Answer:

A)21

Explanation:

To know the difference between the number of electrons in the two atoms, we must first know the number of electrons in the atoms.

For Selenium, Se, we have 34 electrons. The element is in group 6 on the periodic table.

Aluminum on the other hand is in the Boron family with a total of 13 electrons.

The difference,( 34-13) electrons gives a total of 21 electrons

strojnjashka [21]3 years ago
5 0

Answer:

a.21

Explanation:

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This increase in blood pHpH due to hyperventilation disrupts O2O2 transport by causing the deprotonation of various residues of
Genrish500 [490]

The question is incomplete as it does not have the options which has been provided in the attachment.

Answer:

1. sudden decrease

2. Respiratory alkalosis

Explanation:

Hyperventilation is a condition caused by the excess removal of the CO₂ from the blood which leads to the decrease in the pCO₂ of the arteries.

This decrease can cause fainting and death of the individual due to the malfunctioning of the body parts, especially the brain.

The decrease in the CO₂ amount of the blood causes the formation of bicarbonate and H⁺ ions which leads to respiratory alkalosis.

Therefore the selected options are correct.

8 0
3 years ago
How many moles of molecular oxygen (o2) are consumed in the complete combustion of one mole of pentane (c5h12)?
Mama L [17]
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5CO₂ - 10O
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8 moles of molecular oxygen are consumed
3 0
3 years ago
Show the empirical formula manganese fluoride; 59.1% Mn and 40.9% F. Fill in the subscripts on the formula below. Make sure to h
Gre4nikov [31]

Hey there!:

Given % of Mn=59.1% means 59.1 g of Mn present in 100 g of manganese fluoride.

Molar mass of Mn= 54.938 g/mol

Moles of Mn = mass / molar mass

59.1 /54.938 => 1.07 ≈ 1 mol.

and % of F=40.9% means 40.9 g of of F present in 100 g of manganese fluoride.

Molar mass of F=18.998 g/mol

Moles of F :

40.9 / 18.999 => 2.15 mol ≈ 2 mol.

The mole ratio between Mn:F=  1 : 2

Therefore the empirical formula of manganese fluoride:

=> MnF2=Mn1F2

Hope that helps!

3 0
4 years ago
Read 2 more answers
How many hours are in 1987 seconds. Please explain
blagie [28]

Just divide!

60 seconds = 1 min

60 mins = 1 hour

1987 seconds divided by 60 seconds = 33.11 minutes

Your answer would be 33 minutes and 11 seconds

8 0
3 years ago
A mixture of iodine crystals and common salt can be separated by.
Vinvika [58]
The answer : A sublimation
6 0
3 years ago
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