Answer:
The length of a side of the square is 4.53 cm
Explanation:
Volume (V) = mass/density
mass = 3.4 mg = 3.4/1000 = 0.0034 g
density = 19.3 g/cm^3
V = 0.0034/19.3 = 1.76×10^-4 cm^3
Volume = area × thickness
Area = volume/thickness = 1.76×10^-4/8.6×10^-6 = 20.48 cm^2
Length of one side of the square = sqrt(area of square) = sqrt(20.48 cm^2) = 4.53 cm
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Electromagnetic waves
Unlike mechanical waves, these waves can travel though vacuum because they do not need a medium of travel.
Explanation:
This is how sunlight reaches earth. Sunlight has many wavelengths if electromagnetic waves called an electromagnetic spectrum. The electromagnetic spectrum ranges from the high energy waves called gamma rays (they have the shortest wavelength and highest frequency). On the other end of the spectrum are the lowest energy waves called radio waves (they have the longest wavelength and lowest frequency).
Learn More:
Check more on electromagnetic radiation here;
brainly.com/question/1551400
brainly.com/question/1530050
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Answer: Carbon Hydrogen and water
1:2:1
Explanation:
Carbohydrates are made of Carbon Hydrogen and water. Hence, they are represented by a general formula Cx(H2O)y.
Carbohydrates have carbon, hydrogen and oxygen in ratio 1:2:1, as is found in glucose (C6H12O6), Glycerose (C3H6O3), Ribose (C5H10O5).
Thus, in all sugars carbon, hydrogen and oxygen are found in ratio 1:2:1
Answer:
3.18 g of lead sulfate is produced in this reaction
Explanation:
The reaction is this one:
Na₂SO₄ (aq) + Pb(NO₃)₂ (aq) → 2 NaNO₃ (aq) + PbSO₄ (s)
Let's determine the moles of reactants, to find out which is the limiting.
Molarity . volume = Mol
0.105 m/L . 0.100L = 0.0105 moles of sulfate
0.985 m/L . 0.100L = 0.0985 moles of nitrate
Ratio is 1:1, so 1 mol of sulfate needs 1 mol of nitrate, to react.
0.0985 moles of nitrate need 0.0985 moles of sulfate to react, but I only have 0.0105 moles so the sulfate is my limiting reactant.
Ratio is again 1:1, so 0.0105 moles of sulfate make 0.0105 moles of lead sulfate.
Mol . molar mass = mass → 0.0105 mol . 303.26 g/m = 3.18 g
