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3 years ago

An ion of which element is larger than its atom? Al I Са Sr

Chemistry

2 answers:

SIZIF [17.4K]3 years ago

5 0

Option 2

Hope this helps :)

Karo-lina-s [1.5K]3 years ago

4 0

Option 2 I hope u don’t fail lol good luck

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What is the pressure of a sample of gas at a volume of .335 L if it occupies 1700 mL at

Alchen [17]

Answer:

4,313.43 mmHg is the pressure of a sample of gas at a volume of .335 L if it occupies 1700 mL at 850 mm Hg

Explanation:

Boyle's law says:

"The volume occupied by a given gas mass at constant temperature is inversely proportional to the pressure." This means that if the quantity of gas and the temperature remain constant, the product of the pressure for the volume always has the same value.

Boyle's law is expressed mathematically as:

Pressure * Volume = constant

o P * V = k

If you have a certain volume of gas V1 that is at a pressure P1 at the beginning of the experiment and you vary the volume of gas to a new value V2, then the pressure will change to P2, it will be true:

P1 * V1 = P2 * V2

In this case:

V1=0.335 L
P1= ?
V2= 1700 mL= 1.7 L (Being 1 L=1000 mL)
P2= 850 mmHg

Replacing:

P1*0.335 L=850 mmHg*1.7 L

Solving:

$P1=\frac{850 mmHg*1.7 L}{0.335 L}$

P1=4,313.43 mmHg

4,313.43 mmHg is the pressure of a sample of gas at a volume of .335 L if it occupies 1700 mL at 850 mm Hg

5 0

3 years ago

In a certain industrial process involving a heterogeneous catalyst, the volume of the catalyst (in the shape of a sphere) is 10.

mamaluj [8]

Answer:

Explanation:

We know that the

reaction catalyzing power of a catalyst ∝ surface area exposed by it

Given

volume V1= 10 cm^3

⇒ $\frac{4}{3} \pi r^3= 10$

hence r= 1.545 cm

also, surface area S1= $4\pi r^2$

now when the sphere is broken down into 8 smaller spheres

S2= 8×4πr'^2

now, equating V1 and V2 ( as the volume must remain same )

$\frac{4}{3}\pi r^3=8\times\frac{4}{3} \pi r'^3$

and solving we get

r'= r/2

therefore, S2= $8\times4\pi\frac{r}{2}^2$

S2= $2\times4\pi r^2$

S2= 2S1

hence the correct answer is

. The second run has twice the surface area.

8 0

3 years ago

Density of water is 1 g/ml. If a piece of wood with a density of 5 g/ml is

Alchen [17]

Answer:

The piece of wood will sink

Explanation:

If an object has a density higher than water, it will sink, and the piece of wood is more dense than water when measured.

6 0

2 years ago

If a substance is not able to be separated by physical means but is able to be separated by chemical means, it is a(n)

fenix001 [56]

A compound is a substance that consists of 2 or more elements chemically combined in a fixed proportion.

Compounds can be broken down ijt0 simple substances by chemical means but, elements cannot.

4 0

3 years ago

How did Moseley establish a more accurate periodic table?

GrogVix [38]

B.by arranging the elements according to atomic number instead of atomic mass awnser is B

4 0

2 years ago

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