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jonny [76]
3 years ago
14

How many particles are in 7.07x10^-6 moles of a substance?

Chemistry
1 answer:
Butoxors [25]3 years ago
5 0

Answer:

4.25*10^18

Explanation:

1 mole =6.023*10^23 particles

so 7.07*10^-6 mole=6.023*10^23*7.07*10^-6 particles=4.25*10^18 particles

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Help me guys please i need help
bearhunter [10]

Answer:

It helps microorganisms grow

Explanation:

I think this is the correct answer because I tried searching it up and you sterilise the petri dish before adding the agar, I've used agar in petri dishes a year ago and im pretty sure they don't make cells glow or make bacteria appear larger.

if I had to have a second guess I'd go with the first one but considering the fact that bacteria is usually to small to see with the naked eye the last option seems correct

7 0
3 years ago
Which has more kenetic energy: A 150 g bullet fired from a gun achieving a velocity of 440 m/s and a standard baseball weighing
aleksley [76]

Answer:

Bullet has more kinetic energy then baseball.

Explanation:

Mass of the bullet , m = 150 g = 0.150 kg

Velocity of the bullet = v = 440 m/s

Kinetic energy =\frac{1}{2}\times mass\times (velocity)^2

Kinetic energy of the bullet = K.E

K.E=\frac{1}{2}mv^2=\frac{1}{2}\times 0.150 kg\times (440 m/s)^2

=14,520 Joules

Mass of the baseball, m' = \frac{51}{4} oz= 0.36146 kg

(1 ounce = 0.0283495 kg)

Velocity of the baseball= v' = 105.1 mph

1 mile = 1609.34 m

1 hour = 3600 seconds

v'=\frac{ 105.1\times 1609.34 m}{3600 s}=46.98 m/s

Kinetic energy of the baseball = K.E'

K.E'=\frac{1}{2}m'v'^2=\frac{1}{2}\times 0.36146 kg\times (46.98 m/s)^2

=398.83 Joules

14,520 Joules > 398.83 Joules

K.E > K.E'

Bullet has more kinetic energy then baseball.

7 0
4 years ago
What is a beta particle ?
shtirl [24]
A Beta Particle is <span>a fast-moving electron emitted by radioactive decay of substances.</span>
5 0
3 years ago
Read 2 more answers
The ability to conduct electricity in the solid state is a characteristic of metallic bonding. This characteristic is best expla
satela [25.4K]

Answer:

C

Explanation:

The presence of mobile electrons explains the reason why there is conduction of electricity in the solid state. Electrons are the part of atoms that are majorly responsible for the different characteristics that substances exhibit.

A good example of the conduction of electricity can be seen in the case of 2 crystalline forms of carbon. While one of the allotropes could conduct electricity, the other allotrope cannot conduct electricity.

The two allotropes we are talking about here is graphite and diamond. While graphite could be used in a whole lot of electrolysis set up as an electrode, diamond does not found use in cases like this despite its crystalline structure. The reason for this is simple.

While diamond does not contain free mobile electron in its molecule, these free mobile electrons are present in a molecule of graphite. These free mobile electrons are the main reason why graphite can conduct electricity and diamond cannot even though they are both crystalline forms of carbon.

4 0
4 years ago
Alcohol can damage your liver, esophagus, stomach pancreas and heart.<br> a. TRUE<br> b. FALSE
Firlakuza [10]
True this is so true alcohaul impacts and harms your body but not only physically also mentally.
4 0
3 years ago
Read 2 more answers
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