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3 years ago

radioactivity is produced when unstable nuclei ____. a)bond together b)break apart c)become cooler d)expand

Chemistry

2 answers:

Alexeev081 [22]3 years ago

8 0

Radioactivity is produced when unstable nuclei B. Break apart.

inysia [295]3 years ago

6 0

Answer:

b) break apart

Explanation:

The radioactivity is the process in which an unstable atomic nucleus lose energy by emitting radiation like alpha particles, beta particles, gamma rays and positrons which make part of the nuclei.

An alpha particle is a nucleus of helium

A Beta particle is an electron

The gamma rays are photons

And a positron is like and electron but with positive charge.

All these types of radiation make part of the radioactive decay.

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When an object floats in water, it displaces a volume of water that has a weight equal to the weight of the object. If a ship ha

swat32

The amount of seawater that will be displaced would be 1.3274 x $10^5$ $ft^3$

<h3>Density and volume</h3>

Density = mass/volume.

Since a floating object displaces its own weight, a 4247 tons ship will also displace the same amount of water.

4247 tons of seawater = 3.8528 x $10^9$ g

volume of 3.8528 x $10^9$ g seawater = mass/density = 3.8528 x $10^9$ g/1.025 = 3758829268.29 cubic centimeter.

3758829268.29 $cm^3$ = 132741.80 $ft^3$ or 1.3274 x $10^5$ $ft^3$

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3 years ago

Find the ratio of the volume divided by the

Nataly [62]

From the pair of values given, the ratio of the volume to the temperature for the first data pair is, 0.0026 cm³/K

<h3>What is a Ratio?</h3>

A ratio is a comparison between two quantities showing how much one quantity differs from another.

From the data given, the first data pair is as follows ;

Temperature = 276 K
Volume = 0.72 cm³

Ratio of volume to temperature = volume / temperature

Ratio = 0.72 / 276

Ratio = 0.002608 cm³/K

The significant figure's rule for division is the least number of significant figures used in the operation.

The least significant figure of the values given is 2.

Therefore, the ratio of the volume to the temperature for the first data pair is 0.0026 cm³/K

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4 0

2 years ago

How many neutrons does an element have whose electronic formula is 1s²2s²2p⁵

Flura [38]

Answer:

it have 10 neutrons and it is Fluorine(F).

4 0

3 years ago

What effect does a lone electron pair have on molecular shape?

loris [4]

Using the VSPER theory, the effect of lone pairs on molecular shape can be discussed.

There are 3 types of electron pairs present in a molecular shape: bond pair -bond pair, lone pair - bond pair, lone pair - lone pair.

Strength of repulsions between these three types of pair follows the order:

lone pair- lone pair > lone pair - bond pair > bond pair - bond pair

Whenever there is an addition of lone pairs to the geometry, some distortions take place which decreases the bond angles and some asymmetry is attained in the original molecular shape.

4 0

3 years ago

How many liters of hydrogen gas are formed from the complete reaction of 1.03 mol of C? Assume that the hydrogen gas is collecte

aliina [53]

Answer:

27 liters of hydrogen gas will be formed

Explanation:

Step 1: Data given

Number of moles C = 1.03 moles

Pressure H2 = 1.0 atm

Temperature = 319 K

Step 2: The balanced equation

C +H20 → CO + H2

Step 3: Calculate moles H2

For 1 mol C we need 1 mol H2O to produce 1 mol CO an 1 mol H2

For 1.03 moles C we'll have 1.03 moles H2

Step 4: Calculate volume H2

p*V = n*R*T

⇒with p = the pressure of the H2 gas = 1.0 atm

⇒with V = the volume of H2 gas = TO BE DETERMINED

⇒with n = the number of moles H2 gas = 1.03 moles

⇒with R = the gas constant = 0.08206 L*Atm/mol*K

⇒with T = the temperature = 319 K

V = (n*R*T)/p

V = (1.03 * 0.08206 *319) / 1

V = 27 L

27 liters of hydrogen gas will be formed

8 0

3 years ago