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4 years ago

What is the mass of 3.01x1023 atoms of iron(atomic mass of fe=56)

Chemistry

1 answer:

nlexa [21]4 years ago

4 0

Answer:

N = n× l

N = number of entities

n= moles

l = Avogadro's constant = 6.023 × 10^23

3.01 × 10^ 23 = n * 6.023 × 10^23

n = 3.01 × 10^23/6.023 × 10^23

n= 0.5moles

Molar mass = mass/ number of moles

Molar mass = 56

mass = 56 × 0.5

= 28g

Hope this helps.

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I need help bad bro i have a 30 cs this is missing

Nat2105 [25]

Answer: 11.02 moles of Ag can be formed.

Explanation:

To calculate the moles :

$\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}$

$\text{Moles of} Cu=\frac{350.00g}{63.55g/mol}=5.51moles$

The balanced chemical equation is:

$Cu+2AgNO_3\rightarrow Cu(NO_3)_2+2Ag$

According to stoichiometry :

1 moles of $Cu$ produces = 2 moles of $Ag$

Thus 5.51 moles of $Cu$ will produce= $\frac{2}{1}\times 5.51=11.02moles$ of $Ag$

Thus 11.02 moles of Ag can be formed.

4 0

3 years ago

A. In the complete reaction of 22.99 g of sodium

fenix001 [56]

Answer : 58.44 g

<h3>Further explanation</h3>

The reaction

$\tt Na+Cl\Rightarrow NaCl$

mole ratio :

Na : Cl : NaCl = 1 : 1 : 1

Molar mass of Na : 22,989769 g/mol = 22.99 g/mol

Molar mass of Cl : 35,453 g/mol= 35.45 g/mol

Molar mass of NaCl : 58,44 g/mol

Let's check the mol for reactant (Na and Cl) and product(NaCl)

mol of Na :

$\tt mol=\dfrac{22.99}{22.99}=1$

mol of Cl :

$\tt mol=\dfrac{35.45}{35.45}=1$

Then the reactants are completed reacting because it matches the mole ratio, which is 1: 1

so that the mole of the product can be determined from the mol Na or Cl, which is 1

mass of NaCl :

$\tt =\dfrac{mol~NaCl}{mol~Na}\times MW~NaCl\\\\=\dfrac{1}{1}\times 58.44\\\\=\boxed{\bold{58.44~g}}$

3 0

4 years ago

write a chemical equation for the ionization of water. how do you indicate that this is a reversible action?

LiRa [457]

H₂O + H₂O ⇌ H₃O⁺ + OH⁻

You use two single-barbed arrows pointing in opposite directions (technically rightwards harpoon over leftwards harpoon) <em>to indicate a reversible reactio</em>n.

8 0

3 years ago

When atoms combine they form<br> A. molecules<br> B.periodic table<br> C.particles<br> D.protons

IceJOKER [234]

Answer

A. molecules

Explanation

When atoms or elements combine, they are called molecules. When molecules combine they form compounds.

6 0

4 years ago

Which half-reaction is most easily reduced? A. Al3+ + 3e- Al = -1.66 V B. Cu2+ + 2e- Cu = 0.34 V C. Fe3+ + e- Fe2+ = 0.77 V D. N

mario62 [17]

use the website math papa it works

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3 years ago