Does the reaction of a burning candle give off or absorb heat

How much energy must be removed from a 125 g sample of benzene (molar mass = 78.11 g/mol) at 425.0 K to liquify the sample and lower the temperature to 335.0 K? The following physical data may be useful. Hvap = 33.9 kJ/molHfus = 9.8 kJ/molCliq = 1.

What is high porosity

Which state of matter has no define volume or definite shape but expands to fill the available volue of s container?

Why is the unsaturated zone not filled woth water

Which type of orbitals overlap to form the sigma bond between c and cl in ch3cl?

Which element has an ion that is smaller than an ion calcium? Potassium, strontium, cesium, magnesium

A peregrine falcon can travel 537,600 furlong/fortnight. A race car travels 212ft/s. A spider can jump with a maximum velocity of 9,000,000 cm/hr. Which travels the fastest?

how many energy levels (shells) does an atom of oxygen have? How do you know this by looking at the periodic table?

A student needs to use 0.575 moles of sodium chloride in an experiment. How many grams should he mass out?

Which of the following seperation methods is used to seperate plant pigments? Filtration, Chromatography, fractional distillation, simple distillation?