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4 years ago

Which of the following would have a fixed shape and volume?

1 answer:

8 0

Answer is: solid wood.

There are five fundamental states of matter (gas, liquid, solid, plasma and Bose–Einstein condensate).
In solid, molecules are closely packed, stiff and do not changes of shape or volume. Solid object (in this example wood) does not take on the shape of its container.
Liquids (in this example water) have definite volume, but no fixed shape.
Gases (in this example nitrogen and neeon) not have definite volume and fixed shape, it depends on its container.

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R = 0.821 ( atm Calculate the pressure in a 212 L tank containing 584 moles of Argon gas at 25℃? (Answer = 67.3 atm)

spayn [35]

Answer:

67.3 atm

Explanation:

We'll begin by converting 25 ℃ to Kelvin temperature. This can be obtained as follow:

T(K) = T(℃) + 273

T(℃) = 25 ℃

T(K) = 25 + 273

T(K) = 298 K

Finally, we shall determine the pressure. This can be obtained by using the ideal gas equation as illustrated below:

Gas constant (R) = 0.821 atm.L/Kmol

Volume (V) = 212 L

Number of mole (n) = 584 moles

Temperature (T) = 298 K

Pressure (P) =?

PV = nRT

P × 212 = 584 × 0.0821 × 298

P × 212 = 14288.0272

Divide both side by 212

P = 14288.0272 / 212

P = 67.3 atm

Thus, the pressure is 67.3 atm

3 0

3 years ago

Which statement best discribes the usual form and funtion of a plants root system

Misha Larkins [42]

Answer:

The chemical energy is used to form ATP bonds. ... Which statement best describes the relationship between the products of photosynthesis ... Usually sap quickly covers the wound, and then the tree covers the wound with new growth

Explanation:

8 0

3 years ago

Read 2 more answers

1) 4.25 x 1022 atoms Ni = _g Ni

nexus9112 [7]

Answer:

Mass of Ni = 4.14 grams

Explanation:

Molar mass : It is the amount of substance present in 1 mole of the molecules.

Moles : It is the quantity that contains as many atoms as present in 12 gram of C-12. This is equal to Avogadro Number .

$Avogadro\ Number= N_{0}$

$N_{0}=6.022\times 10^{23}$

Molar mass of Ni = 58.69 g/mole

Moles can be calculated by two formula:

$moles(n)= \frac{given\ mass(m)}{Molar\ mass(M)}$

$n=\frac{m}{M}$ ........(1)

And ,

$moles=\frac{Number\ of\ atoms(N)}{N_{0}}$

$n=\frac{N}{N_{0}}$ .........(2)

Comparing equation 1 and 2

$\frac{m}{M}=\frac{N}{N_{0}}$

$N = 4.25\times 10^{22}$

$N_{0}=6.022\times 10^{23}$

M = 58.69 g/mole

Put these value in the formula and solve for m

$\frac{m}{58.69}=$

$\frac{4.25\times 10^{22}}{6.022\times 10^{23}}$

$\frac{m}{58.69} = 0.0705$

$m=58.69\times 0.0705$

m = 4.14 gram

Mass of Ni = 4.14 grams

Second Approach :

Find the moles first using :

$n=\frac{N}{N_{0}}$

Then put value of n in the formula(1) and solve for m

$n=\frac{m}{M}$ ........(1)

7 0

3 years ago

The smallest part of a compound that still has the properties of that compound is a(n)

m_a_m_a [10]

a molecule is the smallest particle of a compound is still has the compounds property it consists of two or more atoms bonded together

4 0

3 years ago

Why would a candle stop burning when oxygen concentration is at its lowest?

egoroff_w [7]

Answer:

The candle will give out less light if there is a lower of oxygen. This happens because a high concentration of oxygen means that there are a of oxygen molecules near the wax. With a lot of molecules - it is likely that the molecules will bump into the wax.

5 0

3 years ago