All categories

3 years ago

1. Adrian has a rectangular block with the dimensions 3.5 in by 8.0 in by 5.5

Chemistry

1 answer:

miskamm [114]3 years ago

8 0

Answer:

The density of the block is 2.827 grams/ cubic inch

Explanation:

The density of the block can be obtained by dividing the given mass of the block by its volume.

Density = mass / volume

The mass of the block given is 435.5 grams

The volume of the block can be obtained by using the formula:

Volume = Length X breadth X height

Volume = 3.5 X 8 X 5.5 = 154 $in^3$

There fore the density will be 435.5 / 154 = 2.827 grams/ cubic inch

You might be interested in

Nana76 [90]

Hey :)

Air pollution

Hope this helps!

Good luck in your test :)

7 0

4 years ago

Read 2 more answers

List the two main kinds of changes that you can observe when chemical reactions occur.

melisa1 [442]

Changes in energy and formation of new substances.

5 0

3 years ago

If an ice cube is added to a warm drink, what changes about the thermal energy of the molecules in the ice cube and drink ?

Alex Ar [27]

The thermal energy heats up the energy in the ice cube causing it to melt and cool off the drink slightly.

4 0

3 years ago

Assuming dopant atoms are uniformly distributed in a silicon crystal, how far apart are these atoms when the doping concentratio

enyata [817]

Answer:

d =~ 5.8μm

d =~ 0.13 μm

Explanation:

when the doping concentrations are 5 × 10^15 cm^-3

d = v^-1/3 ; where d represent the distance between the atoms , and v represent the volume

d =1/ ∛v

d = 1/ ∛5 × 10^15

d = 1/ 170997.5

d = 5.85 × 10 ^ -6

d =~ 5.8μm

when the doping concentrations are 5 × 10^20 cm^-3

d = v^-1/3 ; where d represent the distance between the atoms , and v represent the volume

d =1/ ∛v

d = 1/ ∛5 × 10^20

using the principle of surds and standard forms, we have

d = 1/ ∛0.5 × 10^21

d = 1/7937005.26

d = 1.26 × 10 ^ -7

d = 0.126 × 10 ^ -6

d =~ 0.13 μm

8 0

3 years ago

Please explain moles concept

larisa86 [58]

Answer:

A mole is the amount (10) of material containing 6.02214 × 10 raised to the power of 23 particles.

5 0

1 year ago