Chemistry Answers

When potassium dichromate (K2CrO4) is added to a solution containing 0.500g silver nitrate (AgNO3) solid silver chromate (Ag2CrO4) is formed

Arrange the ff ions in order of increasing size giving your reason:potassium ion ,chlorine ion ,sulphuric ion and calcium ion

1. Investigate: Select Na. In the Gizmo, the hydrogen atom is shown next to a positive charge. As you move the atom to the right, the force of attraction between the positive charge and the valence electron will increase until the electron is removed.

(b) How many grams of carbon dioxide can be produced by burning 7.16 moles of propane? Assume that oxygen is the excess reactant in this reaction.

"The smallest bone in the human body, which is in the ear, has a mass of 0.0030 g. what is the mass of this bone in pounds?"

The following industrial processes produce ethanol.

Hydration of ethene: C2H4(g) + H2O(g) =C2H5OH(l)

Fermentation of glucose: C6H12O6(aq) = 2C2H5OH(aq) + 2CO2(g)

(a) What is the atom economy by mass of the fermentation process?

A) 25.6%

B) 46.0%

C) 51.1%

D) 92.0%

A gas has a volume of 3.00 L and a pressure of 75.4 kPa. when the volume expands to 4.00 L and the pressure drops to 72.7 kPa, the gas temperature is 0C. what was the initial temperature of the gas?

Observation for silver nitrate sol is mixed with HCl/NaCl

Hello, will you kindly help me

1) Matter and energy are

a) similar to work and distance.

b) interconvertible

c) not related to each other

d) similar to mass and weight

which of the following has the greater mass ?

a) 1.25 kg of lead b) 1.25 kg of aluminum c) 1.25 kg of cotton d) 1.25 kg feathers e) none of the above

A vessel of volume 5 liters was filled with 2 moles of hydrogen gas (a), then a further 1 mole of chlorine gas (b), and then the mixture was sparked leading to the formation of 1 mole of HCl (g) (c). What are the partial pressure of the components and the total pressure of the system at the final stage. The temperature being 25oC throughout.