What is the half-life of a radioisotope if a 20 g sample becomes 5 g after 2 days?

Answer:

they have different forces holding the atoms together

Explanation:

diamond has a strong convalent bond holding the particles together while chalk has weak van der waals forces holding the particles together hence the diffrence in hardness

Answer:

"1 M" will be the right solution.

Explanation:

The given values are:

Number of moles,

= 2 moles

Volume of solution,

= 2000 mL

or,

= 2 L

Now,

The molarity of the solution will be:

=  [tex]\frac{Moles}{Liters}[/tex]

On substituting the values, we get

=  [tex]\frac{2}{2}[/tex]

=  [tex]1 \ M[/tex]

Answer:

[tex]from \: avogadros \: hypothesis \\ 1 \: mole \: of \: nitrogen \: reacts \: with \: 3 \: moles \: of \: hydrogen \\ 3 \: litres \: of \: nitrogen \: react \: with \: ( \frac{3 \times 3}{1} ) \\ 9 \: litres \: of \: hydrogen[/tex]

Answer:

injury

Explanation:

because get hurt we can say injury

Answer:

The temperature of  the heated gas is 357.6 K (or 84.6 C)

Explanation:

Gay Lussac's law indicates that, as long as the volume of the container containing the gas is constant, as the temperature increases, the gas molecules move faster. Then the number of collisions with the walls increases, that is, the pressure increases. That is, the pressure of the gas is directly proportional to its temperature.

In short, when there is a constant volume, as the temperature increases, the pressure of the gas increases. And when the temperature is decreased, the pressure of the gas decreases.

So, this law indicates that the quotient between pressure and temperature is constant:

[tex]\frac{P}{T} =k[/tex]

You want to study two different states, an initial state 1 and a final state 2. Then it is true:

[tex]\frac{P1}{T1} =\frac{P2}{T2}[/tex]

In this case:

Replacing:

[tex]\frac{8.532 atm}{293.2 K} =\frac{10.406 atm}{T2}[/tex]

Solving:

[tex]T2*\frac{8.532 atm}{293.2 K} =10.406 atm[/tex]

[tex]T2=10.406 atm*\frac{293.2 K}{8.532 atm}[/tex]

T2= 357.6 K

The temperature of  the heated gas is 357.6 K (or 84.6 C)

The new temperature of the heated gas when the pressure increase to 10.406 atm is 84.60 °C

The new temperature of the gas can be obtained by using the combined gas equation as illustrated below:

P₁V₁ / T₁ = P₂V₂ / T₂

Since the volume is constant, we have:

P₁ / T₁ = P₂ / T₂

8.532 / 293.20 = 10.406 / T₂

Cross multiply

8.532 × T₂ = 293.20 × 10.406

Divide both side by 8.532

T₂ = (293.20 × 10.406) / 8.532

T₂ = 357.6 K

Subtract 273 from 357.6 K to express in degree celsius

T₂ = 357.6 – 273

T₂ = 84.60 °C

Learn more about gas laws:

https://brainly.com/question/6844441

Answer:

6.75 sym.

Explanation:

Boyle's Law:  The pressure of a gas in an enclosed container with a flexible volume is inversely proportional to the volume occupied by the gas.

Empirically => P ∝ 1/V => P = k(1/V) => k = P·V

For any conditions of Pressure & Volume, Pressure x Volume is a constant.

Therefore, k₁ = k₂ => P₁V₁ = P₂V₂ => V₂ =  P₁V₁ / V₂

=> V₂ = (3atm)(0.450L)/(0.200L) = 6.75 atm.

Answer:

But there is nothing above

Answer:

a. 5 8/100 is equivalent to $ 5.08.

Explanation:

i hope this helps :)

Answer:

fermentation

Explanation:

fermenting does not require oxygen as a way to produce energy

Answer:

Do it if you feel like its your chance! Good luck!

Explanation:

Answer:

P1 =4 atm

T1= 20°C

P2=1 atm

T2=?

According to Gay-Lussac's Law or Third Gas Law,

P1T2=P2T1

4×T2=1×20

T2= 20/4

T2= 5°C

Answer At 5°C temperature does a gas at 1.00 atm !

Answer: we can make our own water and not take any water from animal.

Explanation:

Answer:

I'm ok at it.

Explanation:

I can try to help if you need anything:)

Answer:

Sb2S3 + 6HCl ⇆ 2SbCl3 + 3H2S

Explanation:

Answer:

Hydrogen has 0 neutrons.

Explanation:

You can find the # of neutrons by subtracting the Atomic Mass from the Atomic number. Hydrogen is a special case in which the atom has no neutrons.

Answer:

donald trump

Explanation:

Answer:

CO2 + H2O = C6H12O6 + O2

or

6CO2 + 6H2O = C6H12O6 + 6O2 if it need to be balanced

Answer:

Answer is 6CO2 + 6H20 + (energy) → C6H12O6 + 6O2

Explanation:

Answer:

‍♀️?sorryyyyyyyyyyyyy

Answer:

Avogadro's Law; 15.1L

Explanation:

Boyle's Law- Pressure and volume are inversely related, so an increase in pressure= decrease in volume. We see this in the equation P1V1=P2V2.

Charle's Law- Gas expands/increases in volume when temperature increases, so they are proportional. We see this in the formula [tex]\frac{V1}{T1} = \frac{V2}{T2}[/tex].

Guy-Lussac's Law-  As temperature increases, pressure increases, so they are proportional. We see this in the formula [tex]\frac{P1}{T1} = \frac{P2}{T2}[/tex].

Avogadro's Law- There are equal amount of volume have an equal amount of moles, so they are proportional. We see this in the formula [tex]\frac{V1}{n1} = \frac{V2}{n2}[/tex].

Plugging in the values based on Avogadro's Law, we'll have:

[tex]\frac{36.5}{2.9} = \frac{V2}{1.2}[/tex]

12.6 = [tex]\frac{V2}{1.2}[/tex]

12.6 x 1.2 = V2

15.1L =V2

Answer:

no pics sorry. v vc. gkfgildhrmsykesetksyekuxrux

Answer:

B

Explanation:

Answer:

Electronic configurations describe each electron as moving independently in an orbital, in an average field created by all other orbitals.

Explanation:

Answer:

Supersaturated

Explanation:

The tea has absorbed and dissolved as much sugar as it could. If there is sugar left at the bottom, it means the solution is supersaturated because it can't absorb any more.