26 A substance that dissolves in water and produces hydronium ions as the only positive ions in the solution is classified as(1) an alcohol (3) a base
(2) an acid (4) a salt

Answers

Answer 1

Answer:

Answer : The correct option is, (2) an acid

Explanation:

As we know that when a substance (acid) that dissolves in water, it produces hydronium ion as a positive ion and conjugate base as a negative ion.

For example :

When $CH_3COOH$ (acid) dissolves in water, it produces hydronium ion as a positive ion and conjugate base as a negative ion.

The balanced reaction will be,

$CH_3COOH+H_2O\rightarrow H_3O^++CH_3COO^-$

Therefore, the substance is, (2) an acid

Answer 2

Answer: (2) an acid
It's caused by an Arrhenius acid mixing with water to form Hydronium and Hydroxide ions

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You have three molecules of glucose (3C6H12O6). How many carbon atoms do you have?A. 3

B. 6

C. 18

D. 36
**MY answer: C. 18

Which of the following is a homogenous mixture of two or more pure substances?
A. oxygen
B. water
C. air
D. alcohol
**MY answer: D. alcohol

are they correct???

Answers

You have three molecules of glucose (3C6H12O6). How many carbon atoms do you have?C. 18
Your answer is correct

Which of the following is a homogenous mixture of two or more pure substances?
C. air
Your answer is wrong.

Answer:

1) The correct answer is option C.

2) the correct answer is option C.

Explanation:

1) Molecular formula of glucose = $C_6H_(12)O_6$

Number of carbon atoms in single molecule = 6

Number of carbon atoms in 3 molecule of glucose :

$(6)/(1)* 3=18 atoms$ of carbon

There are 18 carbon atoms in the 3 molecules of glucose.

2) Homogeneous mixture is the mixture in which components are evenly distributed throughout the mixture. The shape and size of the particles are identical in the mixture.

Heterogeneous mixture is the mixtures in which component are unevenly distributed throughout the mixture. The shape and size of the particles are not identical in the mixture.

Air is the mixture of gases with 78% of nitrogen gas, 21% of oxygen gas and remaining 1 % are other gases. Air is a homogeneous mixture of different gases.

Where as water, oxygen , alcohol are pure substances.

In a _________the molecules are very close together

Answers

Is a solid because liquids are not is not that close and gas is very far apart.

Answer:

solid

Explanation:

A 220.0-mL sample of helium gas is in a cylinder with a movable piston at 105 kPa and 275 K. The piston is pushed in until the sample has a volume of 95.0 mL. The new temperature of the gas is 310. K. What is the new pressure of the sample?(1) 5l.1 kPa(2) 216 kPa(3) 243 kPa(4) 274 kPa

Answers

4. This problem is really simple if you realize that you can use the combined gas law:

P1V1/T1 = P2V2/T2

Therefore, just substitute in and solve:

(105 kPa)(220.0 mL)/(275K) = ?kPa(95.0 mL)/(310 K)
Solve for ?
Answer is 274. kPa

The new pressure of the sample of helium gas in a cylinder with a movable piston is 274 kPa.

Option 4)274 kPa is the correct answer.

What is Combined gas law?

Combinedgas law put together both Boyle's Law, Charles's Law, and Gay-Lussac's Law. It states that "the ratio of the product of volume and pressure and the absolute temperature of a gas is equal to a constant.

It is expressed as;

P₁V₁/T₁ = P₂V₂/T₂

Given the data in the question;

Initial volume V₁ = 220.0mL = 0.22L

Initial pressure P₁ = 105kPa = 1.03627atm

Initial temperature T₁ = 275K

Final volume V₂ = 95.0mL = 0.095L

Final temperature T₂ = 310K

Final pressure P₂ = ?

To calculate the new temperature of the gas, we substitute our given values into the equation above.

P₁V₁/T₁ = P₂V₂/T₂

P₁V₁T₂ = P₂V₂T₁

P₂ = (P₁V₁T₂) / V₂T₁

P₂ = ( 1.03627atm × 0.22L × 310K ) / ( 0.095L × 275K )

P₂ = 70.673614LatmK / 26.125LK

P₂ = 2.705atm

P₂ = (2.705 × 101.325)kPa

P₂ = 274 kPa

The new pressure of the sample of helium gas in a cylinder with a movable piston is 274 kPa.

Option 4)274 kPa is the correct answer.

Learn more about the combined gaslaw here: brainly.com/question/25944795

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How many atoms lie in a straight line in the molecule 2-butyne, CH₃C≡CCH₃?a. 10
b. 8
c. 6
d. 4
e. 2

Answers

The carbons from the double link lie in a straight line, together with the neighbouring carbons. The hydrogens lie in a tetrahedrical configuration, so none could be counted. Final answer: 4.

The elements of ________ are: 1) the felonious taking of personal property, 2) from the person or immediate presence of another, 3) against the will of the victim, and 4) accomplished by means of force or by putting the victim in fear.

Answers

Answer:

robbery

Explanation:

The elements of robbery are 1) the felonious taking of personal property, 2) from the person or immediate presence of another, 3) against the will of the victim, and 4) accomplished by means of force or by putting the victim in fear.

Action of taking property by unlawfully from a person or place by force or threat of force is called robbery and all above condition satisfies the term robbery hence robbery is correct match.

1. What kind of diagram shows how energy flows from one organism to another?a. producer c. consumer
b. ecology d. food chain