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Leviafan [203]
3 years ago
9

How are elements grouped according to the number of valence electrons in their outermost levels?

Chemistry
1 answer:
melisa1 [442]3 years ago
8 0

Answer:

I think so this is the answer

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How many moles of solute are present in 2 L of a 25M potassium nitrate (KNO3) solution?
Maksim231197 [3]
Mole= Molarity. Volume(L) = (25)(2)= 50 moles
8 0
3 years ago
Fe(no3)3 + na0h > fe(oh)3 + nano3 is balanced or unbalanced?
VashaNatasha [74]

Answer:

Unbalanced

Explanation:

\text{Fe}(\text{NO}_3)}_3+ \text{NaOH} \rightarrow \text{Fe(OH)}_3 + \text{NaNO}_3\\\\\text{Balanced reaction:}\\\\\text{Fe}(\text{NO}_3)}_3+ 3\text{NaOH} \rightarrow \text{Fe(OH)}_3 + 3\text{NaNO}_3

5 0
2 years ago
1) A mixture of anhydrous sodium carbonate and sodium hydrogencarbonate of mass 10.000 g was heated until it reached a constant
vodomira [7]

The masses of the components are obtained as;

  • Sodium hydrogen carbonate = 3.51 g
  • Sodium carbonate =  8.708 g
<h3>What is decomposition?</h3>

The term decomposition has to do with the breakdown of the given substance into its components. The components of sodium hydrogen carbonate could be identified as water vapor, carbon dioxide gas and sodium carbonate. Among these products that have been listed here, we can see that it is only the sodium carbonate that remains as a solid. The others are gases that move away from the system that is under study.

Now putting down the equation of the reaction, we have;

2NaHCO_{3} (s) ----- > Na_{2} CO_{3} (s) + CO_{2} (g) + H_{2} O(g)

Now, the loss in  mass must be due to the carbon dioxide and the water. Hence we obtain the loss in mass to be 10.000 g -  8.708 g = 1.292 g

Mass of sodium hydrogen carbonate = 2 * 88 g/mol * 1.292 g/62 g/mol

= 3.51 g

Learn more about anhydrous sodium carbonate :brainly.com/question/20479996

#SPJ1

6 0
11 months ago
In a motion diagram the size of the object must be less than the distance moved t or f
KATRIN_1 [288]
The awnser is false.
6 0
2 years ago
Read 2 more answers
If the energy of the reactants is less than
expeople1 [14]
The opposite type of reaction (where energy is taken in from the surroundings of a reaction and thus the energy of the reactants is lower than that of the products) is called an endothermic reaction
7 0
2 years ago
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