Answer:
a) Forces acting on the sled are paired with equal and opposite forces.
I would get a container and weigh it. Then I would put the bouncy balls in the container and weigh it again. Then I would Subtract the weight of the container without the bouncy balls from the container with the bouncy balls.
The elements in the periodic table are arranged in columns - elements in the same column exhibit similar properties.
Mg and Sr are in the same column (period I)
Br and F (period XVII - 17)
S and O (period XVI - 16)
Answer:
Empirical formula is C₂H₄O
Explanation:
Given data:
Percentage of hydrogen = 9.15%
Percentage of carbon = 54.53%
Percentage of oxygen = 36.32%
Empirical formula of butyric acid = ?
Solution:
Number of gram atoms of H = 9.15 / 1.01 = 9.1
Number of gram atoms of O = 36.32 / 16 = 2.27
Number of gram atoms of C = 54.53 / 12 = 4.54
Atomic ratio:
C : H : O
4.54/2.27 : 9.1/2.27 : 2.27/2.27
2 : 4 : 1
C : H : O = 2 : 4 : 1
Empirical formula is C₂H₄O.
Answer:
Matter cannot be created or destroyed in chemical reactions. This is the law of conservation of mass. In every chemical reaction, the same mass of matter must end up in the products as started in the reactants. Balanced chemical equations show that mass is conserved in chemical reactions.
Explanation:
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