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Gelneren [198K]

3 years ago

15

_______ are used because they're economical, easy to process, easy to transport, and the infrastructure exists for their storage

and dissemination. Question 12 options: A) Electrical fuels B) Solar fuels C) Fossil fuels D) Biofuels

1 answer:

eimsori [14]3 years ago

5 0

Explanation:

My answer is option D)Biofuels

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Look at the following chemical compounds. State how many molecules of each reactant are present. (I’m sorry I’ve been working on

Kryger [21]

$▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪$

<h3>Compound ~ $\mathrm{NaOH}$ </h3>

Na = 1

O = 1

H = 1

<h3>Compound ~ $\mathrm{CO_2}$ </h3>

C = 1

O = 2

<h3>Compound ~ $\mathrm{3 \: CaO}$ </h3>

Ca = 3

O = 3

<h3>Compound ~ $\mathrm{2 MgCl_2}$ </h3>

Mg = 2

Cl = 4

7 0

3 years ago

In an experiment, a student gently heated a hydrated copper compound to remove the water of hydration. the following data was re

NeX [460]

The unknown of this problem is the experimental percent of water in the compound in order to remove the water of hydrogen, given the following:

Mass of crucible, cover and contents before heating 23.54 g
Mass of empty crucible and cover 18.82 g
Mass of crucible, cover, and contents after heating to constant mass 20.94 g

In order to get the answer, determine the following:

Mass of hydrated salt used    = 23.54 g – 18.82 g = 4.72 g
Mass of dehydrated salt after heating    = 20.94 g – 18.82 g = 2.12 g
Mass of water liberated from salt   = 4.72 g – 2.12 g = 2.60 g

Then solve the percent of water in the hydrated salt by:

% water = (mass of water / mass of hydrated salt) x 100
% water = 2.60 g / 4.72 g x 100
% water = 55.08 % in the compound

3 0

3 years ago

When the number of electrons in an atom changes, then the atom's_______ change.

AlekseyPX

Answer:

It would change the charge of the atom.

Explanation:

Added electrons cause atoms to be negatively charged, lost electrons cause atoms to be positively charged.

5 0

3 years ago

How does distance affect the strength of the force of gravity

Otrada [13]

<span>The strength of the gravitational force between two objects depends on two factors, mass and distance. the force of gravity the masses exert on each other. If one of the masses is doubled, the force of gravity between the objects is doubled. increases, the force of gravity decreases. you can look it up in Google</span>

3 0

3 years ago

Using the molecular orbital model to describe the bond- ing in F2????, F2, and F2????, predict the bond orders and the relative

masya89 [10]

Answer: F2 : bond order= 1.0

F2+: bond order = 1.5

F2- : bond order = 0.5

Explanation:

1. Starting with F2+

The configuration gives;

F2+ = 9F = 1S2.2S2.2P5

= 9F+ = 1S2.2S2.2P4 (this shows it gives out an electron)

Electronic configuration = σ 1S2σ*1S2σ2S2σ*2S2σ2Pz2 π2Px2 = π2Py2 π*2Px2 = π*2Py1

The number of Electrons = (9*2) – 1 = 18 -1 = 17

Bonding electrons (Nb) = 10

Antibonding electrons (Na) = 7

Bond order = (10-7)/2 = 3/2 = 1.5

Number of unpaired electrons = 1

2. Starting with F2

The configuration gives;

F2 = 9F = 1S2.2S2.2P5

9F = 1S2.2S2.2P5 (this shows no loss of an electron)

Electronic configuration = σ 1S2σ*1S2σ2S2σ*2S2σ2Pz2 π2Px2 = π2Py2 π*2Px2 = π*2Py2

The number of Electrons = (9*2) = 18 electrons

Bonding electrons (Nb) = 10

Antibonding electrons (Na) = 8

Bond order = (10-8)/2 = 2/2 = 1.0

Number of unpaired electrons = 0

3. Starting with F2-

The configuration gives;

F2- = 9F = 1S2.2S2.2P5

10F--= 1S2.2S2.2P6 (this shows an addition of an electron)

Electronic configuration = σ 1S2σ*1S2σ2S2σ*2S2σ2Pz2 π2Px2 = π2Py2 π*2Px2 = π*2Py2 σ*2Pz

The number of Electrons = (9*2) + 1 = 19 electrons

Bonding electrons (Nb) = 10

Antibonding electrons (Na) = 9

Bond order = (10-9)/2 = 1/2 = 0.5

Number of unpaired electrons = 1

To get the order of bond as well as length, we know that;

Bond order directly proportional to 1/ Bond length

Therefore the Ascending Bond length = F2+ ˂ F2 ˂ F2-

3 0

3 years ago