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3 years ago

An aerospace engineer is designing a rocket to have three stages. Which is

Chemistry

2 answers:

natima [27]3 years ago

5 0

Answer:

A. To simplify the design of the rocket.

Explanation:

Correct answer for APEX quiz!

valina [46]3 years ago

4 0

Answer:

A not reasonable explanation for an aerospace engineer designs a rocket to have three stages is:

A. To simplify the design of the rocket

Explanation:

A three stages rocket permits to separate the fuel compartments. The rocket must be launched with a huge amount of fuel to last the entire travel. Then the initial mass of the rocket and the fuel is considerably large.

As the rocket flies, part of the fuel is consumed and so some compartements may be separated and removed decreasing the mass of the rocket as it flies (option D. is a reasonable explanation), so the rocket only carries the necessary mass (statement B. is a reasonable explanation).

As the rocket moves away from Earth, the gravitational force decreases and, in the space, the amount of thrust needed is lesser, which the aerospace engineers take into account for the design (choice C. is a reasonable explanation).

The only not reasonable explanation to design a three stage rocket is to simplify the design of the rocket: designing a rocket with three modules each with different features, functions, and the detachment mechanisms brings lot of complex problems to solve. So, option A. is the correct answer.

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How many representative particles are 9.01 moles of water? (Make sure to write you answer in scientific notation.)

g100num [7]

Answer:

54.26 × 10²³ representative particles

Explanation:

Given data:

Number of moles of water = 9.01 mol

Number of representative particle = ?

Solution:

one mole of any substance contain 6.022 ×10²³ representative particles.

9.01 mol × 6.022 ×10²³ representative particles

54.26 ×10²³ representative particles

The number 6.022 × 10²³ is called Avogadro number.

"It is the number of atoms , ions , molecules or representative particles in one gram atom of element, one gram molecules of compound and one gram ions of a substance "

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3 years ago

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mel-nik [20]

1. D. Soil

2. C. Oil and vinegar

3. D. Distillation

4. D compound

5. C. Fe

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6. C. Fermenting of cheese

3 0

3 years ago

Is mass conserved when 40 g of sodium hydroxide undergoes a chemical change during an interaction with 36.5 g of hydrogen chlori

vichka [17]

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6 0

2 years ago

An Arrhenius base is best defined as a. An Arrhenius base is best defined as a b.hydroxide acceptor. c.proton donor. d.substance

pentagon [3]

Answer: produce hydroxide ions

Explanation:

Arrhenius acids are substances which dissociate in water to give hydrogen ions.

For example: $HCl$ is an Arrhenius acid.

$HCl\rightarrow H^++Cl^-$

Arrhenius bases are substances which dissociate in water to give hydroxide ions.

For example: $NaOH$ is an Arrhenius base.

$NaOH\rightarrow Na^++OH^-$

An Arrhenius base is best defined as produce hydroxide ions

7 0

4 years ago

According to the following reaction, how many grams of calcium sulfate will be formed upon the complete reaction of 30.1 grams o

gtnhenbr [62]

Answer:

55.32 g of CaSO₄.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

H₂SO₄ + Ca(OH)₂ —> CaSO₄ + 2H₂O

Next, we shall determine the mass of Ca(OH)₂ that reacted and the mass of CaSO₄ produced from the balanced equation. This can be obtained as follow:

Molar mass of Ca(OH)₂ = 40 + 2(16 + 1)

= 40 + 2(17)

= 40 + 34

= 74 g/mol

Mass of Ca(OH)₂ from the balanced equation = 1 × 74 = 74 g

Molar mass of CaSO₄ = 40 + 32 + (16×4)

= 40 + 32 + 64

= 136 g/mol

Mass of CaSO₄ from the balanced equation = 1 × 136 = 136 g

SUMMARY:

From the balanced equation above,

74 g of Ca(OH)₂ reacted to produce 136 g of CaSO₄.

Finally, we shall determine the mass of CaSO₄ produced by the reaction of 30.1 g of Ca(OH)₂. This can be obtained as follow:

From the balanced equation above,

74 g of Ca(OH)₂ reacted to produce 136 g of CaSO₄.

Therefore, 30.1 g of Ca(OH)₂ will react to produce = (30.1 × 136)/74 = 55.32 g of CaSO₄.

Thus, 55.32 g of CaSO₄ were obtained from the reaction.

7 0

3 years ago