Other Chemistry Answers

How many liters of nitric acid solution, with a concentration of 0.05 mol / dm3, can be made if we have 150 cm3 of 60% nitric acid, whose density is 1.37 g / cm3?

Calculate the mass concentration of the solution if there is 0.12 mol KCl in 500 cm3 of solution!

What will be the mass concentration of the HCl solution if 400 cm3 of water is added to 100 cm3 of a solution with a mass concentration of 10 g / dm3?

If 100 cm3 of 37% hydrochloric acid, density 1.18 g / cm3, is added to 4900 cm3 of water, calculate the mass concentration of the newly formed solution!

What will be the quantitative concentration of the newly formed solution if we add 800 cm3 of water to 400 cm3 of hydrochloric acid solution, mass concentration of 12.25 g / dm3?

 Which of the following gases under identical conditions (temperature, pressure) contains the 

largest number of molecules?

(A) 10 g nitrogen (B) 10 g chlorine (C) 10 g sulphur trioxide

(D) 10 g helium (E) 10 g carbon dioxide

Please help answer these questions with explanations

Question 1

The knowledge of half life can be used to

A. Create an element

B.detect an element

C. Split an element

D. Irradiate an element

Question 2

Can radioisotopes be used for the following

i.treatment of cancer

ii. Detection of the ages of ancient tools

III. Detection of leakages in water pipes

Iv. Preparation of drugs.

 Calculate the number of moles of Na⁺ ions in 25 g of sodium carbonate, Na₂ CO₃.

What is a brand spectrum

C⁶H⁶+O²-CO²+H²O