Answer:
Answer (D) d = m/V
Explanation:
density = mass / volume volume = mass / density length x width x thickness (height) = volume >>>substituting>>> length x width x thickness = mass / density thickness = mass / (density x width x length)
Answer: 53.4 kJ
Explanation:
Exothermic reactions are defined as the reactions in which energy of the product is lesser than the energy of the reactants. The total energy is released in the form of heat and for the reaction comes out to be negative.
To calculate the moles of sodium , we use the equation:
According to stoichiometry, it can be seen that :
2 moles of sodium will liberate = 822 kJ
Thus 0.13 moles of sodium will liberate =
Thus 53.4 kJ of heat is released if 2.972 g of Na are consumed in the reaction.
Answer: 10m/s^2
Explanation:
Force acting on couch = 200N
Mass of couch = 20 kg
Acceleration of the couch = ?
Recall that force is the product of the mass of an object by the acceleration by which it moves.
i.e Force = Mass x Acceleration
200N = 20kg x Acceleration
Acceleration = 200N/20kg
Acceleration = 10m/s^2
Thus, the acceleration of the couch is 10m/s^2
Answer:
mass = 0.5679 Kg
<em>hope this helps!</em>