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Strike441 [17]
3 years ago
6

Opening a can of paint requires a screwdriver or other machine to pry open the lid. how does a screwdriver affect the force appl

ied to opening the lid
A. it increases the applied force and reduces its distance
B. it increases the applied force and changes its distance and direction
C. it changes the distance of the applied force
Chemistry
2 answers:
PtichkaEL [24]3 years ago
8 0

Answer:

It increases the applied force and changes its distance and direction

Explanation:

Opening a can of paint requires a screwdriver or other machine to pry open the lid. Screwdriver is type of simple machine.    

A screwdriver affect the force applied to opening the lid. Screwdriver is used to increase applied torque. It also changes the distance and the direction of the applied force.

So, the correct option is (b) " it increases the applied force and changes its distance and direction ".

joja [24]3 years ago
7 0
<span>Opening a can of paint requires a screwdriver or other machine to pry open the lid. The screwdriver affect the force applied to opening the lid.  The answer is :  </span><span>B.  It increases the applied force and changes its distance and direction.</span>
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Which of these is NOT a cause of the heat inside Earth?
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Bombardment by asteroids

Explanation:

All of the other ones explain themselves

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In an aqueous solution at 25°C, if [H30+] = 3.3 * 10^4 M, then [OH-] is:
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Answer:

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Explanation:

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Determine the relative formula mass of hexasodium difluoride using the periodic table below. A. 138 g/mol B. 176 g/mol C. 20 g/m
laila [671]

Answer:

Option B. 176g/mol

Explanation:

We'll begin by writing the chemical formula for hexasodium difluoride. This is given below:

Hexasodium means 6 sodium atom

Difluoride means 2 fluorine atom.

Therefore, the formula for hexasodium difluoride is Na6F2.

The relative formula mass of a compound is obtained by simply adding the atomic masses of the elements present in the compound.

Thus, the relative formula mass of hexasodium difluoride, Na6F2 can be obtained as follow:

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3 0
3 years ago
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How many moles are in 39.5 grams of Lithium?
Blizzard [7]

Answer:

185.05 g.

Explanation

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From the balanced equation: 2LiCl → 2Li + Cl₂

It is clear that the stichiometry shows that 2.0 moles of LiCl is decomposed to give 2.0 moles of Li metal and 1.0 moles of Cl₂, which means that the molar ratio of LiCl : Li is (1.0 : 1.0) ratio.

We must convert the grams of Li metal (30.3 g) to moles (n = mass/atomic mass), atomic mass of Li = 6.941 g/mole.

n = (30.3 g) / (6.941 g/mole) = 4.365 moles.

Now, we can get the number of moles of LiCl that is needed to produce 4.365 moles of Li metal.

Using cross multiplication:

2.0 moles of LiCl → 2.0 moles of Li, from the stichiometry of the balanced equation.

??? moles of LiCl → 4.365  moles of Li.

The number of moles of LiCl that will produce 4.365 moles of Li (30.3 g) is (2.0 x 4.365 / 2.0) = 4.365 moles.

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