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3 years ago

Bullet Level, Measuring Tape, Ruler and Plum Bob are examples of what type of tools a.hammers b.wrenches c.layout tools d.pilers

Chemistry

1 answer:

k0ka [10]3 years ago

8 0

The correct answer is C. Layout tools.

Explanation

Layout tools are a group of artifacts that are designed and manufactured to contribute to human tasks in specific measurement tasks, and quantification of lengths and inclinations in construction, design, planning on a plane, geometry, mathematics, among others. In the layout tools group are the measuring tape and the ruler they serve to measure lengths in centimeters, meters, inches, millimeters, among other units of measurement; a plumb line is also a tool used to calculate the inclination of a vertical surface using the force of gravity; likewise, the bullet level is a tool that uses the bubble of a liquid as a guide to know if it is completely level or has an inclination or deviation. According to the above, the correct answer is C. Layout tools.

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What volume of hydrogen gas is required to react with 113 liters of ethylene (C2H4) according to the following reaction? (All ga

AysviL [449]

Answer: The volume of hydrogen gas required for the given amount of ethylene gas is 113 L

Explanation:

At STP:

1 mole of a gas occupies 22.4 L of volume

We are given:

Volume of ethylene = 113 L

For the given chemical equation:

$H_2(g)+C_2H_4(g)\rightarrow C_2H_6(g)$

By Stoichiometry of the reaction:

$(1\times 22.4)L$ of ethylene reacts with $(1\times 22.4)L$ of hydrogen gas

So, 113 L of ethylene gas will react with = $\frac{(1\times 22.4)}{(1\times 22.4)}\times 113=113L$ of hydrogen gas

Hence, the volume of hydrogen gas required for the given amount of ethylene gas is 113 L

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3 years ago

5. A gas has a pressure of 310 kPa at 237 degrees C. What will its pressure be at 23 degrees C?)

slavikrds [6]

Answer:

The pressure of the gas at 23 C is 179.92 kPa.

Explanation:

Gay-Lussac's law indicates that, as long as the volume of the container containing the gas is constant, as the temperature increases, the gas molecules move faster. Then the number of collisions with the walls increases, that is, the pressure increases. That is, the pressure of the gas is directly proportional to its temperature.

In short, when there is a constant volume, as the temperature increases, the pressure of the gas increases. And when the temperature is decreased, the pressure of the gas decreases.

Gay-Lussac's law can be expressed mathematically as follows:

$\frac{P}{T} =k$

Studying two states, one initial 1 and the other final 2, it is satisfied:

$\frac{P1}{T1} =\frac{P2}{T2}$

In this case:

P1= 310 kPa
T1= 237 C= 510 K (being 0 C= 273 K)
P2= ?
T2= 23 C= 296 K

Replacing:

$\frac{310 kPa}{510 K} =\frac{P2}{296 K}$

Solving:

$P2=296 K*\frac{310 kPa}{510 K}$

P2= 179.92 kPa

The pressure of the gas at 23 C is 179.92 kPa.

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Sodium is much more apt to exist as a cation than is chlorine. this is because __________. sodium is much more apt to exist as a

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