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2 years ago

Which process would most likely be employed to separate a mixture of sand and water?

Chemistry

2 answers:

Andreas93 [3]2 years ago

4 0

Answer:

filtration

Explanation:

Filtration is a process that is most commonly used for separating the solid part of a solution from the liquid portion. Such as when making coffee using coffee grounds and water.

kicyunya [14]2 years ago

3 0

Filtration can be used to separate sand and water.

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Which of the following is produced when two or more elements combine in a chemical reaction?

eimsori [14]

Answer:

a compound i think

Explanation:

7 0

2 years ago

1. What pressure would be exerted by 46.0grams of hydrogen gas placed into a 3.00 L container at

dlinn [17]

Answer:

187.34 atm

Explanation:

From the question,

PV = nRT.................. Equation 1

Where P = Pressure, V = Volume, n = number of mole, R = molar gas constant, T = Temperature.

make P the subject of the equation

P = nRT/V.............. Equation 2

n = mass(m)/molar mass(m')

n = m/m'............... Equation 3

Substitute equation 3 into equation 2

P = (m/m')RT/V............ Equation 4

Given: m = 46 g, T = 25°C = (25+273) = 298 K, V = 3.00 L

Constant: m' = 2 g/mol, R = 0.082 atmL/K.mol

Substitute these values into equation 4

P = (46/2)(0.082×298)/3

P = (23×0.082×298)/3

P = 187.34 atm

3 0

2 years ago

Solid carbon dioxide (CO2), also known as dry

Mademuasel [1]

Answer:

yes

Explanation:

yes because the ice changes forms physically and can be changed back. not 100% sure tho

4 0

2 years ago

Read 2 more answers

If a scientist knows the relative age of a fossil, he can also know

Rasek [7]

C I think is the right answer

4 0

1 year ago

Molecules have ionization energies, just like atoms do. The ionization energy for molecular oxygen, for example, is 1314 kJ/mol.

taurus [48]

Answer:

91.1835 nm

Explanation:

Given that the ionization energy of the oxygen molecule = 1314 kJ/mol

It means that

1 mole of oxygen molecules can be ionized by the energy = 1314 kJ = 1314000 J

1 mole of molecules contains 6.022 × 10²³ atoms

So,

6.022 × 10²³ atoms of oxygen molecules can be ionized by the energy = 1314000 J

1 atom require $\frac{1314000}{6.022\times 10^{23}}\ J$ of energy

Energy = $2.18\times 10^{-18}\ J$

Also

$E=\frac {h\times c}{\lambda}$

Where,

h is Plank's constant having value $6.626\times 10^{-34}\ Js$

c is the speed of light having value $3\times 10^8\ m/s$

$\lambda$ is the wavelength

So,

$\lambda=\frac {h\times c}{E}$

$\lambda=\frac{6.626\times 10^{-34}\times 3\times 10^8}{2.18\times 10^{-18}}\ m$

$\lambda=91.1835\times 10^{-9}}\ m$

Also,

$1\ nm=10^{-9}}\ m$

So, wavelength = 91.1835 nm

6 0

2 years ago