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earnstyle [38]
3 years ago
6

Which came first the henry g.j moseley atomic model or the niels bohr atomic model?

Chemistry
1 answer:
Gnesinka [82]3 years ago
5 0
The niels bohr model
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How many molecules are in 7.90 moles of CH4?
faltersainse [42]
The ans is 4.76 ×10^24
Steps :
7.90×6.02×10^23
6 0
3 years ago
An iron nail rusts when exposed to oxygen. According to the following reaction, how many grams of iron(III) oxide will be formed
natka813 [3]

Answer: 103.8 g of Fe_2O_3, 0.65 moles of

Explanation:

To calculate the moles :

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

\text{Moles of} O_2=\frac{31.1}{32}=0.975moles

Thus O_2 is the limiting reagent as it limits the formation of product and Fe is the excess reagent.

4Fe(s)+3O_2(g)\rightarrow 2Fe_2O_3

According to stoichiometry :

3 moles of O_2 produce =  2 moles of Fe_2O_3

Thus 0.975 moles of O_2 will produce=\frac{2}{3}\times 0.975=0.65moles of Fe_2O_3

Mass of Fe_2O_3=moles\times {\text {Molar mass}}=0.65moles\times 159.69g/mol=103.8g

Thus 103.8 g of Fe_2O_3 will be produced.

7 0
3 years ago
Distinguish between single and double replacement reactions and give an example of<br> each.
Alenkasestr [34]

Answer:

i think this is right!

Explanation:

An example of a single replacement reaction occurs when potassium (K) reacts with water (H2O). A colorless solid compound named potassium hydroxide (KOH) forms, and hydrogen gas (H2) is set free. The equation for the reaction is: 2K + 2H2O → 2KOH + H.

An example of a double replacement reaction is the reaction between silver nitrate and sodium chloride in water. Both silver nitrate and sodium chloride are ionic compounds. Both reactants dissolve into their ions in aqueous solution.

6 0
2 years ago
Generally the periodic trends of the d and f block is similar to the main group elements trends.
exis [7]

Answer:

False

Explanation:

7 0
3 years ago
The rate of reaction is fastest at the _______ of a chemical reaction
astraxan [27]

Answer:

Beginning or Start

Explanation:

Reactions can be followed by measuring changes in concentration, mass and volume of reactants or products. The rate is highest at the start of the reaction because the concentration of reactants is highest at this point.

Hope this helped! :^)

5 0
3 years ago
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