If we work it out with direct proportions, the vapor pressure of propanone is 56 degrees Celsius. The atmospheric pressure is about 101 kPa. If the vapor pressure is equal to the atmospheric pressure, the substance boils. Therefore, if we hold a linear proportion, 45/56 = x/101. 56x = 101*45, x = 101*45/56 = 81. The closest choice here is (3) 70 kPa.
Next time, please provide us with Reference Table H.
The best answer is C! Hope I helped :D
Answer:
Has a positive charge
Explanation:
Protons inside the nucleus help bind nucleus together. They also attract negative charged electrons.
In science negative to negative/positive to positive repels and negative to positive or vice versa attract to each other.
