Balance the following reaction. A coefficient of "1" is understood. Choose option "blank" for the correct answer if the coefficient is "1."Al + HCl → AlCl3 + H2

Answers

Answer 1

Answer: The balanced equation is:

2Al + 6HCl -> 2AlCl3 + 3H2

There are 2 Al, 6H, and 6 Cl making the equation balanced and if you need the coefficients in order it is: 2,6,2,3

Answer 2

Answer:

Answer:

2Al + 6HCl -> 2AlCl3 + 3H2

Explanation:

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Freezing requiresa. the removal of energy.
b. the absorption of energy.
c. no energy change.

Answers

Answer:

The correct answer is option a. the removal of energy.

Explanation:

Hello!

Let's solve this!

Freezing is a process by which a lot of heat is lost, this loss of heat leads to a loss of energy as well. It means that energy is eliminated so that heat loss occurs.

Therefore the correct answer is option a. the removal of energy.

How many mL of a stock solution of 2.00 M KNO3 are needed to prepare 100.0 mL of 0.15M KNO3? with work plz

Answers

Using the law of dilution :

Mi x Vi = Mf x Vf

2.00 x Vi = 0.15 x 100.0

2.00 x Vi = 15

Vi = 15 / 2.00

Vi = 7.5 mL

hope this helps!

What is the noble gas configuration for silicon?

Answers

[Ne]3s23p2
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Is the following a chemical change or a physical change? A pencil is sharpened in a pencil sharpener, leaving behind shaving. Physical Change Chemical Change

Answers

This is an example of physical change, because the pencil's chemical composition does not change.

*Physical Change.*
A physical change in a substance doesn't change what the substance is.
A Chemical change, there is a chemical reaction, a new substance is formed and energy is either given off or absorbed.

The model below represents a nuclear reaction. Atom 1 is present before the reaction and Atom 2 and Atom 3 are produced after the reaction.Atom 1 = Atom 2 + Atom 3 + energy

The model most likely represents a reaction which
Select one:
a. takes place when atoms combine
b. takes place when atoms become inactive
c. does not produce energy in the sun
d. does not produce energy in nuclear power plants

Answers

Answer: b: takes place when atoms become inactive

Explanation: the model described above is a nuclear fission reaction, a reasonably controlled reaction that releases energy and is employed in nuclear power plants. In these reactions one Atom is split into two lighter ones and there's a resultant release of energy in the process. The original Atom becomes depleted (inactive) as is the case with Uranium 235.

This reaction is opposed to fusion reactions that occur in nature e.g. the sun, and are basically uncontrollable — involving the combination of two atoms into one.

The right answer for the question that is being asked and shown above is that: "d. does not produce energy in nuclear power plants." The model most likely represents a reaction which d. does not produce energy in nuclear power plants

One mole of an ideal gas is held at standard conditions. At what Kelvin temperature would the pressure be doubled?

Answers

The pressure of the gas will become double when its Kelvin temperature becomes $\boxed{{\text{twice}}}$ its initial value.

Further Explanation:

Ideal gas equation:

Ideal gas is just a theoretical concept and practically no gas can act as ideal. It can be considered as group of random moving particles having perfectly elastic collisions between them.

Ideal gas equation for one mole of gas is mentioned below.

PV = RT …… (1)

Here,

P is the gas pressure.

V is the gas volume.

T is the absolute temperature of gas.

R is the universal gas constant.

Standard conditions refer to state when pressure of gas is 1 atm and its temperature is 273 K.

Consider P’ and T’ to be new pressure and temperature respectively while all other terms in ideal gas equation remains constant. Equation (1) then modifies as follows:

P’V = RT’ …… (2)

Since new pressure is doubled, P’ becomes 2P. Equation (2) becomes,

(2P)V = RT’ …… (3)

Dividing equation (3) by equation (1), we get:

$\frac{{\left( {{\text{2P}}} \right){\text{V}}}}{{{\text{PV}}}} = \frac{{{\text{RT'}}}}{{{\text{RT}}}}$ …… (4)

Solving for T’,

${\text{T'}} = {\text{2T}}$

Therefore pressure is doubled when temperature becomes twice its initial value.

Learn more:

Which statement is true for Boyle’s law? brainly.com/question/1158880
Calculation of volume of gas: brainly.com/question/3636135

Answer details:

Grade: Senior School

Subject: Chemistry

Chapter: Ideal gas equation

Keywords: ideal gas equation, R, T, P, V, 2P, 2T, pressure, volume, universal gas constant, P’, T’, standard conditions.

The volume should be kept in constant condition.
Then we go $PV=nRT P/T = constant P1/T2 =P2/T1 T2=P1 T1 /P2$
and if P2 is equal to 2P1, we have $T2=P1T1/2P1=1/2 T1$
which means that needed temperature is half of the initial temperature

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Hey! If someone could help me out I would really appreciate it even if it was just one answer. I'm really stuck on 3. Its second year of chem!