34 Substance Q boils at 445 °C and is a yellow solid at room temperature.
Which temperature could be the melting point of pure Q?

A. -9°C
B.72 °C to 78 °C
a. 116 °C
D. 116 °C to 126 °C

116 °C

Explanation:

The given parameters of the Substance Q are;

The boiling point of Q = 445°

The substance Q is a solid at room temperature

Given that Q has a single fixed boiling point, Q, is suspected to be a pure substance, and it will therefore also have a fixed single melting point above room temperature;

Therefore, the best option is option C. 116 °C, which is above a single temperature value above 116 °C

i dont know

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.