Answer:
Mass of sodium react = 8.63 g
Explanation:
Given data:
Mass of sodium hydroxide produced = 15 g
Mass of sodium react = ?
Solution:
Chemical equation:
2Na + 2H₂O → H₂ + 2NaOH
Number of moles of sodium hydroxide:
Number of moles = mass/ molar mass
Number of moles = 15 g/ 40 g/mol
Number of moles = 0.375 mol
Now we will compare the moles of Sodium and sodium hydroxide.
NaOH : Na
2 : 2
0.375 : 0.375
Mass of Sodium:
Mass = number of moles × molar mass
Mass = 0.375 mol× 23 g/mol
Mass = 8.63 g
No,Biomass is organic material which has stored sunlight in the form of chemical energy. Biomass fuels include wood, wood waste, straw, manure, sugar cane, and many other byproducts from a variety of agricultural processes. Biomass is a renewable energy source because the energy it contains comes from the sun<span>.</span>
Old and inefficient mining smokestacks contaminate the soil around abandoned mine sites.
<h3>What are mines?</h3>
A mine is an area from which natural resources are extracted such as coal, metals, etc. A mine is known to be the source of many heavy metals as well as acid.
As such the statement that does not represent the impact of mining services is that; "Old and inefficient mining smokestacks contaminate the soil around abandoned mine sites".
Learn more about mine sites:brainly.com/question/25875677
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Answer:
Catalysts
Explanation:
Catalysts lower the aviation energy.
