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sergejj [24]
3 years ago
5

An element is an arrangement of atoms in a particular way; True or False?

Chemistry
1 answer:
sergij07 [2.7K]3 years ago
8 0

Answer:

i think it's true because An element is a substance that is made entirely from one type of atom

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kati45 [8]
<span>Each second, solid sodium chloride dissolves and solid sodium chloride recrystallizes. </span>
4 0
2 years ago
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You start with 100mL of 14M HNO3 and 10grams of copper metal. How many moles of the nitrogen dioxide gas will be produced?
givi [52]

Answer:

0.316 moles are produced.

Explanation:

We state the redox reaction:

4HNO₃   + Cu   →  Cu(NO₃)₂ + 2NO₂ + 2H₂O

We need to determine the limting reactant:

0.1 L . 14 M = 1.4 moles

10 g . 1mol/ 63.54g =0.158 mol

Cu is the limiting reactant. Let's see

4 moles of acid need 1 mol of Cu to react

1.4 moles of acid may react to (4 . 1) / 1.4 = 0.35 moles

We do not have enough Cu.

1 mol of Cu can produce 1 mol of NO₂

Then 0.158 moles will produce, 0.316 moles. (double of moles)

If we see stoichiometry, ratio is 1:2

7 0
2 years ago
Which is a molecule?<br> A. Ne<br> B. NaCL<br> C. Trail Mix<br> D. graphene
elixir [45]
B) NaCl is a molecule.
5 0
3 years ago
Calculate the molarity of a solution if there are 1.5 mol of NaCl in 2.3 L of solution
frosja888 [35]

Answer:

0.6522 mol/L.

Explanation:

<em>Molarity is defined as the no. of moles of a solute per 1.0 L of the solution.</em>

<em />

M = (no. of moles of solute)/(V of the solution (L)).

<em>∴ M = (no. of moles of solute)/(V of the solution (L)) </em>= (1.5 mol)/(2.3 L) = <em>0.6522 mol/L.</em>

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Question 2: Answer is (B), Soil Conservation Act (1936)



Hope that helps!!!
7 0
3 years ago
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