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3 years ago

Speed is the ratio of the distance an object moves from a reference point to

Chemistry

1 answer:

Vladimir [108]3 years ago

4 0

The correct option is A.

Speed is the ratio of the distance an object moves from a reference point to the amount of time it takes to travel the distance.

For a fixed distance, if the time required to travel the distance is less than the speed is high. However, if time to cover the same amount of distance is more than the speed is low. Therefore, the measurement of speed distance and time has an inverse relationship.

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What’s the answer to number 6 ty!!

cluponka [151]

Answer:

0.00032 M

Explanation:

From the question,

Applying the for pH

pH = -log[H⁺]............... Equation 1

Where H⁺ = Hydrogen ion concentration of Hydrochloric acid

Given: pH = 3.50

Substitute into equation 1 and solve for H⁺

3.50 = -log[H⁺]

Taking the log inverse of both side,

H⁺ = 10⁻⁽³⁵/¹⁰⁾

H⁺ = 0.00032 M

Hence the H⁺ of Hydrochloric acid is 0.00032 M

3 0

3 years ago

Liquid octane CH3CH26CH3 will react with gaseous oxygen O2 to produce gaseous carbon dioxide CO2 and gaseous water H2O . Suppose

Slav-nsk [51]

Answer:

The minimum mass of octane that could be left over is 43.0 grams

Explanation:

Step 1: Data given

Mass of octane = 73.0 grams

Mass of oxygen = 105.0 grams

Molar mass octane = 114.23 g/mol

Molar mass oxygen = 32.0 g/mol

Step 2: The balanced equation

2C8H18 + 25O2 → 16CO2 + 18H2O

Step 3: Calculate the number of moles

Moles = mass / molar mass

Moles octane = 73.0 grams / 114.23 g/mol

Moles octane = 0.639 moles

Moles O2 = 105.0 grams / 32.0 g/mol

Moles O2 = 3.28 moles

Step 4: Calculate the limiting reactant

For 2 moles octane we need 25 moles O2 to produce 16 moles CO2 and 18 moles H2O

O2 is the limiting reactant. It will completely be consumed. (3.28 moles). There will react 3.28 / 12.5 = 0.2624 moles. There will remain 0.639 - 0.2624 = 0.3766 moles octane

Step 5: Calculate mass octane remaining

Mass octane = moles * molar mass

Mass octane = 0.3766 moles * 114.23 g/mol

Mass octane = 43.0 grams

The minimum mass of octane that could be left over is 43.0 grams

3 0

3 years ago

The fact that an organism cannot live without interacting with its surroundings is a concept in the field of study known as

ratelena [41]

Your answer is Echology.

Definetion: Echology <span>is the </span>scientific<span> analysis and study of interactions among organisms and their environment.

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6 0

4 years ago

Which Group 15 element exists as diatomic molecules at STP?

ikadub [295]

Answer: The correct option is 2.

Explanation: Group 15 elements are Nitrogen, phosphorous, Arsenic, Antimony, Bismuth.

To know whether an element exits as a diatomic molecule or not, we look at the atomicity of an element.

Atomicity is the number of atoms of an element combining to form a molecule.

Atomicity of Nitrogen = 2

Atomicity of Phosphorous = 4

Atomicity of Bismuth = 1

Atomicity of Arsenic = 1

The element having atomicity 2 will exist as a diatomic molecule.

Hence, Nitrogen is a diatomic molecule $(N_2)$

4 0

3 years ago

Read 2 more answers

Which of the following is an example of a want, versus a need? A. Food B. Insurance C. Shelter D. Cable TV

TEA [102]

Answer: Option (D) is the correct answer.

Explanation:

Need means necessity without which a person might not be able to survive for long.

For example, food is a need for every living being as without it any individual cannot survive for a long period of time.

Similraly, shelter is also a need and insurance is also necessary as it protects an individuals life or his savings so that after his death the future of his family remains protected.

Whereas cable TV is not a need as an individual can survive without it. Therefore, a cable TV is a want.

3 0

3 years ago

Read 2 more answers