A sample of an aqueous sodium chloride solution containing 8 g of sodium chloride in 100 ml of solution is concentrated to half of its original volume.How many grams of sodium chloride are contained in 25 ml of the new solution?
Answer:

The relative atomic mass of carbon (C) is about 12. Approximately, how many atoms are contained in 6 g of carbon?

What is the minimum weight of sodium chloride (NaCl) that is needed to prepare 7.10 g of chlorine ?Relative atomic masses:  Na = 23.0 ; Cl = 35.5

The graph below shows the solubilities (in g solute/100 ml water) of sodium nitrate and sodium chloride at different temperatures. Refer to it to answer this question.100 g of sodium nitrate and 100 g of sodium chloride are added to 100 cm³ of water at 60°C. The mixture is stirred until no more solid dissolves. It is then filtered, keeping the temperature at 60°C.

What is the residue left on the filter paper ?

From the following, select the three bases that are most commonly used in the chemical industry.

Apart from carbon, proteins always contain:

According to the chemical reactivity series, metals can displace other metals from their solutions.Which of the following metals will displace copper from its solution? Gold - Iron - Magnesium - Silver - Zinc

An aqueous solution of sodium iodide is electrolysed with platinum electrodes.What is the main product at the cathode (negative electrode) ?

Correct statements about the material known as PVC include: