The heat used in phase changes is calculated by multiplying the mass of the substance by the energy of the phase change. In this case, for liquid to boil, we would find total heat by multiply the mass of liquid by the latent heat of vaporization (Hvap). If we are instead given the Hvap and the total heat of 1 kJ, we would divide 1 kJ by the Hvap (which is usually in kJ/kg) to get the mass of liquid boiled (in kg).
Answer:
A). An independent variable
Explanation:
The Independent variable is characterized itself as the variable that is controlled or manipulated by the experimenter to observe its direct impact on the dependent variable. It is a variable that is not dependent and can stand alone. For example, if a student aims to observe the impact of temperature on solubility of a substance(sugar/salt) in a liquid, the temperature will be the independent variable as any change in the temperature will directly affect the solubility power of the liquid. Thus, <u>option A</u> is the correct answer.
Answer:An inverse correlation, also known as negative correlation (or an inverse relationship), is a contrary relationship between two variables such that they move in opposite directions. For example, with variables A and B, as A increases, B decreases, and as A decreases, B increases.J
Explanation:One of the most obvious everyday examples of an inverse relationship is speed to travel time. The faster you drive (or walk, or cycle etc) somewhere, the less time it takes to get there, and this is directly inversely proportional - if you drive twice as quickly on average, then you will get there in half the time.
Compounds such as amino acids that can act as either an acid or a base are called amphoteric.
