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kramer
3 years ago
6

2. A golden-colored cube is handed to you. The person wants you to buy it for

Chemistry
1 answer:
lara31 [8.8K]3 years ago
4 0

Answer:

Volume of the cube is 2*2*2 = 8cm^3.

Divide the weight (40g) over the volume (8cm^3).

Density is 5g/cm^3. Definitely not gold.

Explanation:

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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:

D

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
The method by which the substances in a mixture are separated is called what?
yanalaym [24]

Answer:

Filtration is a separation method used to separate out pure substances in mixtures comprised of particles some of which are large enough in size to be captured with a porous material.

8 0
3 years ago
The term "cycle" is used in Water Cycle because ?
solmaris [256]

Answer:

because cycle is a prosess that goes through multiple stages

Explanation:

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5 0
2 years ago
Please help, thanks!
Anastasy [175]
You need to use the formula--> P1V1= P2V2 (Boyles's law)

P1= 14 bar
V1= 312 mL
P2= ?
V2= 652 mL

now we plug the values into the formula.

(14 x 312) = (P2x 652)

P2= (14 x 312)/ 652= <span>6.70 bar</span>
5 0
3 years ago
HALP PLZ 50 points brainlest and thanks if u halp
Novay_Z [31]
I Would Say The Answer Is C.
8 0
3 years ago
Read 2 more answers
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