The answer is that the pebbles turn into sand
Answer:
Yield = 66.7%
Explanation:
4P + 5O₂ → 2P₂O₅
P: 31 g/mol
O₂: 32 g/mol
P₂O₅: 142 g/mol
31 g P ____ 1 mol
2.80 g P __ x
x = 0.09 mol P
142 g P₂O₅ ____ 1 mol
3.89 g P₂O₅ ___ y
y = 0.03 mol P₂O₅
In a 100% yield, 4 mol of P produces 2 mol of P₂O₅. 0.09 of P should, therefore, produce 0.045 mol of P₂O₅.
Yield = (0.03 mol / 0.045 mol) x 100
Yield = 66.7%
B. They are composed of only one type of atom. This is your answer
Answer:
The kinetic energy of the two curling stones is 320 J
Explanation:
Given;
mass of the first curling stone, m₁ = 20 kg
velocity of the first curling stone, v₁ = 4 m/s
velocity of the second curling stone, v₂ = - 4m/s
assuming the second curling stone to have equal mass with the first stone = 20 kg
The kinetic energy of the first curling stone is given by;
K.E₁ = ¹/₂m₁v₁²
K.E₁ = ¹/₂(20)(4)²
K.E₁ = 160 J
The kinetic energy of the second stone is given by;
K.E₂ = ¹/₂m₂v₂²
K.E₂ = ¹/₂ (20) (-4)²
K.E₂ = 160 J
Thus, the kinetic energy of the two curling stones is given by;
K.E = K.E₁ + K.E₂
K.E = 160 J + 160 J
K.E = 320 J
Therefore, the kinetic energy of the two curling stones is 320 J
The answer to this question would be: C) a single replacement reaction
In single replacement reaction the molecule made in just one with an element. In this case, the compound is just swapping its element with a more reactive one, results in a more stable compound.
Contrast to the single replacement reaction, double replacement reaction or metathesis is the reaction which results in two new compounds. The cation from the molecule reaction is switching with the cation from other molecules.
In contrast to the double replacement reaction,
