A car has a kinetic energy of 4.32 x 10^5 J when traveling at a speed of 23 m/s.
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Answer:
λ = a
Explanation:
This is a diffraction exercise that is described by the expression
a sin θ = m λ
sin θ = m λ/ a
the first zero of the diffraction occurs for m = 1
sin θ = λ / a
angles are generally very small and are measured in radians
sin θ = θ = y / x
we substitute
the width of the central maximum is twice the distance to zero
w = 2y
in the exercise indicate that this width is equal to twice the distance to the screen (2x)
W = 2x
2y = 2x
we substitute
1 = λ/ a
λ = a
we see that the width of the slit is equal to the wavelength used.
The volume of hydrogen gas produced from the reaction at STP is 8517.32 mL.
Volume is a measure of occupied 3-dimensional space. Its miles are often quantified numerically using SI-derived gadgets or with the aid of various imperial devices. The definition of length is interrelated with the extent.
Volume is the amount of 3-dimensional space occupied by means of a liquid, strong, or gas. commonplace devices used for specific quantities include liters, cubic meters, gallons, milliliters, teaspoons, and ounces, even though many different units exist.
Volume is the measure of the ability that an object holds. as instance, if a cup can hold 100 ml of water up to the brim, its extent is stated to be one hundred ml. volume can also be described as the amount of space occupied by a 3-dimensional object.
The given reaction can be written as,
Zn + H2SO4 ZnSO4 + H2
Mass of Zn = 65.38 g/mol
Mass of H = 1 g/mol
Mass of H2= 2 g/mol
From this equation, one mole or 65.38 g of Zn produces 2 g of H2.
Thus 25 g of Zn produce,
25×2/65.38 = 0.76g of
One mole of H2 is 2 g,
Therefore no.of moles of .76 g H2 is,
0.76/2 = 0.38 moles
one mole of H2 contains 22414 mL of volume at STP.
Therefore volume occupied by 0.38 moles is,
0.38×22414 = 8517.32ml
Thereby volume of hydrogen gas produced from the reaction at STP is 8517.32 mL.
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