Answer:
(c) Li2SO4(aq) → 2Li+(aq) + SO4 2-(aq)
Explanation: Lithium atom donates electron to be more electropositive, while, sulphate ion accept electron to become more electronegative.
Answer: BeO
Explanation:
percent by mass of oxygen
percent by mass of oxygen in BeO
percent by mass of oxygen in MgO
percent by mass of oxygen in CaO
percent by mass of oxygen in SrO
The factor that is most responsible for the fact that water is a liquid rather than gas at room temperature is the hydrogen bonding. The hydrogen bonding keeps the water molecules bonded together, otherwise it would have been in a gaseous state. I hope the answer helps you.
Answer:
9028.8 J
Explanation:
The equation for working out the amount of thermal energy required is q = m c Δ T , where q is the amount of energy, m is the mass being heated up in grams, c is the specific heat capacity of what you're heating up in joules per gram per kelvin, and Δ T is the change in temperature in Kelvin.(Change in temperature will always give the same value,no matter Celsius or Kelvin)
mass = 27g, assuming specific heat capacity of water is 4.18 J/g*K, and the change in temperature is 90-10(=80) , the energy needed to raise : 80 × 27 × 4.18 = 9028.8 J
Newton's first law of motion predicts the behavior of objects where all existing forces are balanced. Objects at equilibrium will not accelerate. Also, an object will only accelerate if there is a net or unbalanced force acting upon it. The presence of an unbalanced force will accelerate an object - changing its speed, its direction, or both its speed and direction.
Newton's second law of motion: behavior of objects for and all existing forces are not balanced. The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object. The acceleration of an object depends directly upon the net force acting upon the object, and inversely upon the mass of the object. As the force acting upon an object is increased, the acceleration of the object is increased. As the mass of an object is increased, the acceleration of the object is decreased.