CHEMISTRY HIGH SCHOOL

What is the primary concern when implementing a solution?being creative
being specific being flexible
being authoritative

Answers

Answer 1
Answer: When implementing a solution to a problem, I think the primary concern should be being authoritative. By doing this, people will not slack and will not take advantage of the rules. People will also trust, respect and obey you.
Answer 2
Answer:

Answer:

The correct answer is being authoritative.

Explanation:

Authoritative refers to permission to act without asking permission while being held responsible. While implementation refers to the conclusion of all the work in solving an issue and needs careful consideration to detail. There are three fundamental steps involved, that is, preparing and planning to implement the solution, implementing and observing the activity, and evaluating and studying the success of the action. Thus, in my opinion being authoritative would be a primary concern when implementing a solution.

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Large cities often have a visible haze hanging in the air high above them. What most likely causes this haze? a. many women's aerosol hairsprays

Answers

Haze is caused by particulate matter from incomplete combustion of car, truck, bus, burning of gasoline and diesel. This could also be caused by the buning of wood, coal, and heating oils from industry, electical generation plants that do not collect some of the pollutants at the smoke stack or exhaust points.

Assuming constant pressure and temperature, how many moles of gas have been added to the initial 3 moles of gas when the volume increases from 2.0 to 4.0 liters?1.5 moles

2 moles

3 moles

6 moles

Answers

Answer:

Moles of gas added = 3 moles

Explanation:

Given:

Initial volume of gas, V1 = 2.0 L

Initial moles of gas, n1 = 3 moles

Final volume, V2 = 4.0 L

To determine:

The moles of gas added to bring the final volume to 4.0 L

Explanation:

Based on the ideal gas equation

PV = nRT

where P = pressure, V = volume ; n = moles of gas

R = gas constant, T = temperature

At constant P and T, the above equation becomes:

V/n = constant

This is the Avogadro's law

Therefore:

(V1)/(n1) = (V2)/(n2) \n\nn2 = (V2)/(V1) * n1 = (4.0 L)/(2.0L) * 3 = 6 moles

The final number of moles of gas = 6

Thus, moles added = Final - Initial = n2 - n1 = 6-3 = 3 moles
We first assume that the gas is ideal which is a safe assumption to approximate the answer to the problem. Then we need to know the ideal gas equation and that is:
 
PV=nRT 
where 
P- pressure
V- volume
n-number of moles-
R- ideal gas constant 
T-temperature. 

Since we know that P, T and V are constant, rearranging the equation would lead to:

P/TR = n/V or the ratio of the moles of gas and volume is constant. 

(3moles)/2L = (3+x)/4L 
where 
x is the additional moles. 

Solving for x = 3 moles. 

Is there any difference between carbon(iv)oxide and carbon(ii)oxide

Answers

The difference is the no. of charges  present in Carbon, meaning Carbon has different charges therefore Roman numerals are used to clarify the exact number.This makes balancing equations easier.

Also their names are different.
CO4 - Carbon tetroxide
CO2 - Carbon dioxide

some antacid products contain aluminium hydroxide al(oh)₃ to neutralize excess stomach acid. what volume of 0.10 mol/l stomach acid, hcl, can be neutralized by 912 mg of aluminum hydroxide. the reaction is shown: 3 hcl al(oh)₃ -> alcl₃ 3h₂o

Answers

Antacid products contain aluminum hydroxide al(oh)3 to neutralized by 912 mg of aluminum

Atoms of Ca and S would be expected to react in a ratio ofA) 1:1
B) 1:2
C)2:1
D)3:1

Answers

Answer:

Option A = 1:1

Explanation:

The atoms of calcium and sulphur when react their ration is 1:1. The charge on calcium is +2 and on sulphur is -2.

Ca⁺²S⁻²

The +2 and -2 charges are cancel out and overall charge will be zero.

CaS

so their atomic ratio will be 1:1

Identify the chiral carbon in amphetamine (benzedrine)

Answers

Chiral Carbon is a carbon atom that is attached to 4 different types of atoms or group of atoms

In Amphetamine, there is only 1 carbon that have 4 different types of atoms, so there is only 1 Chiral Carbon in it which have 2 optical isomers :

PhCH2CH(NH2)CH3
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