Which process(es) can be used to separate mixtures but not compounds?

How many moles are in 250 atoms of silver (show work)

Korvikt [17]

Answer:

6.02 x 1023 number of atoms in one mole.

Explanation:

i cant show work because i dont want to be loud in 3 in the moring

3 0

3 years ago

High levels of cholesterol can first lead directly to __________.

Marta_Voda [28]

B) arteriosclerosis

6 0

3 years ago

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Explain why the two argon atoms are attracted to each other.

Inessa05 [86]

Each are non-metals, which form a covalent bond. They also have high electron rapport.
- nonmetal and nonmetal equals covalent bond.

5 0

3 years ago

calculate the molarity of MgCl2 in the following solution: 5.34 g of MgCl2 is dissolved and diluted to 214 mL of solution.

anyanavicka [17]

$\quad\hookrightarrow\quad \sf {0.262M }$

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Molarity is used to measure the concentration of a solution , so it is also as molar concentration. It is denoted as M or Mol/L

We are given that :

Weight of $\sf MgCl_{2}$ = 5.34g
Volume of solution = 214 ml , or 0.214 L

The molar mass of magnesium chloride ( $\sf MgCl_{2}$ ) is 95.21 g / mol

We can calculate the molarity of the solution by dividing the number of moles of solute by volume of solvent in liter ,i.e:

$\quad\longrightarrow\quad \sf {M = \dfrac{n}{V} }$ ‎ㅤ‎ㅤ‎ㅤ⸻( 1 )

Where,

M = molarity
n = number of moles
V = Volume

We can calculate the number of moles by dividing the actual mass by its molar mass ,i.e:

$\quad\longrightarrow\quad \sf { n = \dfrac{w}{m}}$ ‎ㅤ‎ㅤ‎ㅤ‎⸻ ( 2 )

Where,

n = number of moles
m = molar mass
w = actual mass

Therefore,

$\implies\quad \tt {n =\dfrac{w}{m} }$

$\implies\quad \tt { n =\dfrac{5.35\: g}{95.21\: g /mol}}$

$\implies\quad{\pmb{ \tt {n = 0.056 mol}} }$

Putting the values in equation ( 1 ):

$\implies\quad \tt {M=\dfrac{n}{V} }$

$\implies\quad \tt { M =\dfrac{0.056\:mol}{0.214\:L}}$

$\implies\quad\underline{\pmb{ \tt { M = 0.262 \:M }}}$

7 0

2 years ago

The annual production of sulfur dioxide from burning coal and fossil fuels, auto exhaust, and other sources is about 26 million

WARRIOR [948]

Answer is: quantity of sulfur is 13 tons.

Chemical reaction: S(s) + O₂(g) → SO₂(g).

From chemical reaction: n(S) : n(SO₂) = 1 : 1.

n(S) = n(SO₂); amount of substance.

m(S) ÷ M(S) = m(SO₂) : M(SO₂).

m(S) : 32 g/mol = 26 t : 64 g/mol.

m(S) = (32 g/mol · 26 t) ÷ 64 g/mol.

m(S) = 13 t = 13000 kg; mass of sulfur.

3 0

4 years ago

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