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elena-s [515]
4 years ago
11

How does the density of one penny compare with the density of two pennies

Chemistry
1 answer:
Mice21 [21]4 years ago
6 0
Density increases.......
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Determine the volume (in liters) of a 87.8-9 sample of OF2 gas at 307 torr and 264°C.
expeople1 [14]

Answer:

V = 177.4 L.

Explanation:

Hello there!

In this case, since this gas can be assumed as ideal due to the given data, we can use the following equation:

PV=nRT\\\\PV=\frac{m}{MM}RT

Thus, by solving for volume we obtain:

V=\frac{mRT}{MM*P}

So we can plug in the temperature in Kelvins (537 K), the pressure in atmospheres (0.404 atm) and the molar mass (54 g/mol) to obtain:

V=\frac{87.8g*0.08206\frac{atm*L}{mol*K}*537K}{54g/mol*0.404atm}\\\\V=177.4L

Best regards!

6 0
3 years ago
Select the correct answer.
Zarrin [17]

Answer:

C.

Explanation:

A. C - 6 electrons - 1s2 2s2 2p2

B. O - 8 electrons - 1s2 2s2 2p4

C. N - 7 electrons - 1s2 2s2 2p3

D. Be - 4 electrons - 1s2 2s2

4 0
3 years ago
Which of these accurately describes the reactants of a reaction?
oksian1 [2.3K]

Option (C) is the correct answer.

In the chemical reaction, reactants are the starting elements or compounds which will chemically react and will form the products. Reactants are only present on the left hand side of the reaction and products are present on the right hand side of the reaction.

Reactants present in the reaction is completely used up in the reaction to form products implies no traces of reactants will be present in the product side.

For example:

2H_{2}+O_{2}\rightarrow 2H_{2}O

Here, hydrogen and oxygen are the reactants whereas water is the product (new substance). Hydrogen reacts with oxygen and form water i.e. hydrogen and oxygen is completely used up in the reaction to form new substance i.e. water.

Hence, substances that are used up in a reaction is known as reactants of the reaction.





4 0
3 years ago
Read 2 more answers
The tendency for an object at rest to remain at rest is?
cestrela7 [59]
Newtons First Law... <span>Newton's first law of motion - sometimes referred to as the law of </span>inertia<span>. An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an </span>unbalanced<span> force.</span>
6 0
4 years ago
What is the poH of a<br> 2.6 x 10-6 M H+ solution?<br> pOH = [?]
KatRina [158]

Answer:

pOH = 8.41

Explanation:

From the question given above, we obtained the following information:

Concentration of Hydrogen ion [H⁺] = 2.6×10¯⁶ M

pOH =?

Next, we shall determine the pH of the solution. This can be obtained as follow:

Concentration of Hydrogen ion [H⁺] = 2.6×10¯⁶ M

pH =?

pH = – Log [H⁺]

pH = – Log (2.6×10¯⁶)

pH = 5.59

Finally, we shall determine the pOH of the solution. This can be obtained as follow:

pH = 5.59

pOH =?

pH + pOH = 14

5.59 + pOH = 14

Collect like terms

pOH = 14 – 5.59

pOH = 8.41

Therefore, the pOH of the solution is 8.41

5 0
3 years ago
Read 2 more answers
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