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4 years ago

8

Simple machines can _____. A. increase force only B. decrease force only C. increase or decrease force

1 answer:

Mice21 [21]4 years ago

5 0

Answer:

C

Explanation:

Simple machines are most likely capable of increasing and decreasing force, because they are constructed that way. Hope this helps!

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2. Answer this question: Lava rocks I nature come in different shapes and sizes. What processes do you think are responsible the

GuDViN [60]

Answer: im not sure im only in 8th grade but im pretty sure Erosion i started learning about this last year i really cant explain it... im still hainving trouble with it.

Explanation:

4 0

3 years ago

What is the maximum number of grams of N-acetyl-p-toluidine can be prepared from 70. milliliters of 0.167 M p-toluidine hydrochl

Genrish500 [490]

<u>Answer:</u> The maximum amount of N-acetyl-p-toluidine that can be prepared is 1.7 grams.

<u>Explanation:</u>

To calculate the number of moles for given molarity, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}\times 1000}{\text{Volume of solution (in mL)}}$

Molarity of p-toluidine hydrochloride solution = 0.167 M

Volume of solution = 70. mL

Putting values in above equation, we get:

$0.167M=\frac{\text{Moles of p-toluidine hydrochloride}\times 1000}{70}\\\\\text{Moles of p-toluidine hydrochloride}=\frac{0.167\times 70}{1000}=0.0117mol$

The chemical equation for the reaction of p-toluidine hydrochloride and acetic anhydride follows:

$\text{p-toluidine hydrochloride}+\text{Acetic anhydride}\rightarrow \text{N-acetyl-p-toluidine}$

By Stoichiometry of the reaction:

1 mole of p-toluidine hydrochloride produces 1 mole of N-acetyl-p-toluidine

So, 0.0117 moles of p-toluidine hydrochloride will produce = $\frac{1}{1}\times 0.0117=0.0117mol$ of N-acetyl-p-toluidine

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Molar mass of N-acetyl-p-toluidine = 149.2 g/mol

Moles of N-acetyl-p-toluidine = 0.0117 moles

Putting values in equation 1, we get:

$0.0117mol=\frac{\text{Mass of N-acetyl-p-toluidine}}{149.2g/mol}\\\\\text{Mass of N-acetyl-p-toluidine}=(0.0117g/mol\times 149.2)=1.7g$

Hence, the maximum amount of N-acetyl-p-toluidine that can be prepared is 1.7 grams.

6 0

4 years ago

What SI unit is used to measure the number of representative particles in a substance?

trapecia [35]

Its D- Mole

Hope this helps : )

3 0

3 years ago

Read 2 more answers

the 89.5kg boulder begins rolling down the 35.2m hill with a speed of 5.43m/s. Calculate the kinetic energy

galben [10]

<h3><u>Answer;</u></h3>

<u> = 1319.45 Joules </u>

<h3><u>Explanation;</u></h3>

Kinetic energy is the energy possessed by a body in motion;

It is given by the formula; 1/2mv², where m is the mass of the body and v is the velocity.

mass = 89.5 kg and v =5.43 m/s

Therefore;

Kinetic energy = 1/2 × 89.5 × 5.43 ²

<u> = 1319.45 Joules </u>

8 0

4 years ago

What is a giant ball of glowing gas that generates energy by nuclear fusion reaction?

Paladinen [302]

Answer:

sun

Explanation:

3 0

3 years ago