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3 years ago

Please help!!!!

Chemistry

2 answers:

Nat2105 [25]3 years ago

8 0

Answer:

When an atom gains or loses energy, the energy of an electron can change.

An electron in an atom can move from one energy level to another when the atom gains or loses energy.

Explanation:

The possible energies that electrons in an atom

can have are called energy levels.

• An electron cannot exist between energy levels.

https://1.cdn.edl.io/tTlW7xRtvD62xSe7RcZlJr7kSR7XsL93akcgJkbGJBNNcpwY.pdf

*this link can also help* brainly ist plz

Ivan3 years ago

7 0

Answer: Option (c) is the correct answer.

Explanation:

When energy is supplied to an electron then upon absorption of energy it tends to move from a lower energy level to higher energy level.

And, when this electron moves from higher energy level to lower energy level then excess of energy absorbed by it is released in the form of visible light or radiation.

This emission of energy is also responsible for imparting color to a compound.

Thus, we can conclude that when an electron loses its energy then it may drop to a lower energy level.

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If the carbon atom of hydrocarbon is bonded to less than 4 other atoms, the hydrocarbon is considered _______.

antiseptic1488 [7]

It is called as unsaturated hydrocarbons

5 0

4 years ago

Read 2 more answers

What is the mass of a titanium alloy that has a heat of fusion of 422.5 joules/gram and requires 2.960 joules of energy to melt

7nadin3 [17]

Answer:

7.01 g

Explanation:

Answer:- Mass of the titanium alloy is 7.01 g, choice C is correct.

Solution:- The heat of fusion is given as 422.5 joules per gram and it also says that 2960 joules of heat is required to melt the metal completely.

The suggested equation is, Q=mHf

where Q is the heat energy, m is the mass and Hf is the heat of fusion.

Since, we are asked to calculate the mass, the equation could be written as:

m=q/H5

Let's plug in the values in it:

m= 2960J/ 422.5j/g

m = 7.01 g

So, the mass of the titanium alloy is 7.01 g, choice C is correct.

6 0

3 years ago

The label shown above contains information about some harmful effects of acetone.A group of students plans to use acetone to rin

Fed [463]

Answer:

Heating water with an open flame

Explanation:

Remember, we are told in the label that Acetone is a "flammable liquid and vapor." Being flammable means the substance can easily be set on fire, and we would expect an open flame from heating water to trigger an explosion (a disaster) in which the Acetone is set on fire causing life-threatening dangers to the second group of students.

8 0

3 years ago

A spherical ball of lead has a diameter of 2.5 cm . What is the mass of the sphere if lead has a density of 11.34 g/cm3? (The vo

Paladinen [302]

Mass = volume x density

volume = πr²
since Diameter = 2.5 cm
then radius = 1.25cm

∴ volume = π x (1.25cm)³
≈ 6.1359 cm³

Thus mass = 6.1359 cm³ x 11.34 g / cm³
= 69.58 g

3 0

3 years ago

Read 2 more answers

PLEASE HELP :-)

timofeeve [1]

We can solve this problem using the long hand solution, wherein we 1 by 1 analyze the different equilibrium reactions or by simply using the Henderson Hasselbach equation. The equation is

pH = -log(pKa) + log (salt/acid)

since the acid and the salt have the same concentration, the log (salt/acid) term is equal to zero.

thus

pH = -log(1.73*10-5)
pH = 4.76

please be careful with the negative sign

8 0

4 years ago