The substance neon has the following properties: normal melting point: 24.5 k normal boiling point: 27.1 k triple point: 0.425 atm, 24.4 k critical point: 26.2 atm, 44.4 k a sample of neon at a pressure of 1.00 atm and a temperature of 55.9 k is cooled at constant pressure to a temperature of 26.9 k.
which of the following are true? choose all that apply

a. one or more phase changes will occur.
b. the final state of the substance is a solid.
c. the final state of the substance is a liquid.
d. the solid initially present will vaporize.
e. the sample is initially a gas.

answer: mercury

explanation:

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.

answer: a tank of height h is filled with water and sits on the ground. water squirts from a hole at a height y above the ground and has a range r. for two y values, 0 and h, r is zero. determine the value of y for which the range will be a maximum.

explanation:

hey there!

mass = 6.75 g

volume =   9 cm³

therefore:

d = mass / volume

d   = 6.75 / 9

d = 0.7 g/cm³

answer b