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3 years ago

Which is a way that the elements are groupef on the periodic table

1 answer:

8 0

Your answer is B because elements within the same column have equal numbers of valence electrons which determines the reactivity of an element.

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Is hydrogen peroxide a element, compound or a mixture?

victus00 [196]

Answer:

hydrogen peroxide is a compound

4 0

2 years ago

Which of these questions is a scientific question?

n200080 [17]

A or B but i'm leaning more towards A

5 0

3 years ago

If 125 ml of o2 gas exerts a pressure of 1.0 atm inside a cylinder, what will the pressure be if the cylinder compressed the vol

Lelu [443]

<h2>Hello!</h2>

The answer is: The new pressure is 1.67 atm.

From the statement, we know that the temperature remains constant and the gas volume is changing, meaning that the new pressure will be different than the first pressure.

Since the temperature remains constant, we can calculate the new pressure using the Boyle's Law.

The Boyle's Law states that:

$P_{1}V_{1}=P_{2}V_{2}$

Where,

P is the pressure of the gas.

V is the volume of the gas.

Then, the given information is:

$V_{1}=125ml=0.125L\\P_{1}=1atm\\V_{2}=75ml=0.075L$

Remember, 1 L is equal to 1000 mL.

So,

$125mL*\frac{1L}{1000mL}=\frac{125mL*1L}{1000mL}=0.125L\\\\75mL*\frac{1L}{1000mL}=\frac{75mL*1L}{1000mL}=0.075L$

So, calculating the new volume, we have:

$P_{1}V_{1}=P_{2}V_{2}\\\\1atm*0.125L=P_{2}*0.075L\\\\P_{2}=\frac{1atm*0.125L}{0.075l}=1.67atm$

Hence, the new pressure is 1.67 atm.

Have a nice day!

7 0

3 years ago

Why is the Statue of Liberty covered with a greenish bluish cover when it should be in brown color as it is made out of copper ?

allsm [11]

Because after ehough acid rain/Rain it turned turquoise like if you bring a fake gold ring to a pool it will turn brown!

3 0

3 years ago

Read 2 more answers

What does it mean to have protein in your urine?

konstantin123 [22]

It is often a sign of kidney problems. :)

6 0

3 years ago