How many visible impact craters does the moon contain?

Describe nucleus of atom

tresset_1 [31]

Answer:

the nucleus is made up of protons and neutrons

5 0

3 years ago

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An atom that has the same amount of atoms of each element on both sides of the reaction obeys what law

crimeas [40]

Hello there.

An atom that has the same amount of atoms of each element on both sides of the reaction obeys what law
<span>law of conservation of mass</span>

3 0

3 years ago

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Determine the number of atoms and the mass of zirconium, silicon and oxygen found in 0.3384 Mol of zircon ZrSiO4, a

sattari [20]

Explanation:

1 mol of ZrSiO₄ , have , 1 mol of Zr , 1 mol of Si and 4 mol of Oxygen .

since ,

1 mol of a substance have 6.022 * 10 ²³ particles ,

From the question ,

0.3384 mol of zircon ZrSiO₄ ,

hence ,

from the above equation ,

1 mol of a substance have 6.022 * 10 ²³ particles ,

0.3384 mol = 0.3384 * 6.022 * 10 ²³ number of atoms

= 2.037 * 10 ²³ number of atoms

Hence ,

0.3384 mol of ZrSiO₄ will have , 0.3384 mol of Zr ,0.3384 mol of Si and 4*0.3384 mol of Oxygen .

Hence ,

number of atoms of Zr = 0.3384 mol * 6.022 * 10 ²³ = 2.037 * 10 ²³ number of atoms

number of atoms of Si = 0.3384 mol * 6.022 * 10 ²³ = 2.037 * 10 ²³ number of atoms

number of atoms of O = 4 * 0.3384 mol * 6.022 * 10 ²³ = 8.148 * 10 ²³ number of atoms

The mass is calculated as -

since ,

Moles is denoted by given mass divided by the molecular mass ,

Hence ,

n = w / m

n = moles ,

w = given mass ,

m = molecular mass .

n = w / m

w = n * m

mass of Zr ,

Since we know , the molecular mass of Zr = 91 g/mol

moles of Zr = 0.3384 mol

using the above formula ,

w = n * m

w = 0.3384 mol * 91 g/mol = 30.79 g

hence ,

The mass of Zr = 30.79 g

mass of Si ,

Since we know , the molecular mass of Si = 28 g/mol

moles of Si = 0.3384 mol

using the above formula ,

w = n * m

w = 0.3384 mol * 28 g/mol = 9.475 g

hence ,

The mass of Si = 9.475 g

mass of O ,

Since we know , the molecular mass of O = 16 g/mol

moles of Si = 1.3536 mol

using the above formula ,

w = n * m

w = 1.3536 mol * 16 g/mol = 21.65 g

hence ,

The mass of O = 21.65 g

8 0

3 years ago

Which law relates temperature, pressure, volume, and the number of moles of a gas under perfect conditions? Boyle's law Charles'

Triss [41]

<span>The correct answer is ideal gas law.

when the ideal gas law formula is:

PV = nRT ,

when P is the pressure.

V is the volume.

and R is the ideal gas constant.

T is the temperature.

and n is the number of moles.

So, this is the law which relates pressure, temperature, volume and number of moles . and this law state that 1 mole of an ideal gas will occupy a volume V = 22.4 L</span>

6 0

3 years ago

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Draw the best lewis structure for h 2 co 3 and calculate the formal charge on carbon.

schepotkina [342]

The Lewis structure of Carbonic Acid (H₂CO₃) is given below. In structure it is shown that carbon has a double bond with one oxygen atom and two single bonds with hydroxyl groups.

Formal Charge;
Formal charge is caculated as,

Formal charge = # of valence e⁻ - [# of lone pair of e⁻ + 1/2 # of bonded e⁻]

Formal charge on Carbon;

Formal charge = 4 - [ 0 + 8/2]

Formal charge = 4 - [4]

Formal charge = Zero

7 0

3 years ago