Question

lose your internet connection, or exit the exam for another reason, you can get back into the exam, however the time will not stop Question 1 4 pts Which of the following is a physical property of a substance? Methanol, CH,OH, and water mix to make a homogeneous mixture Hydrogen gas is flammable Silverion is reduced to silver metal by a more active metal HCl can be neutralized by NaOH Gold does not react with water.

Answer 1

Question no 1, solution

Physical properties of any substance are defined as the substance don,t get change or alter in its chemical composition, that we can observe. example, color, density, smell, etc

Methanol (CH3OH) and water mix to make a homogenous mixture has classified as physical properties because of the mixture can be separated out by the physical method

Hydrogen gas is a flammable a chemical properties because it shows how much it takes to ignite to any substance

silver ion is reduced to silver metal by a more active metal is a chemical property, as the change to silver ion to silver metal

HCl can be neutralized by NaOH is a chemical property, as we acid-base reaction is a chemical reaction, it gives salt and water.

Gold doest react with water is a chemical property, it,s reaction with metal with is a chemical reaction, although it does not react with because of less reactivity

Question no 2, solution:

Given data are, the density of mercury = 13.6g/cm³ at 20 C and 1 atm pressure. mass of mercury = 2.00 kg

We need to find the volume of mercury at the same conditions

As we know Density = Mass/volume

So, 13.6g/cm³ = 2.00 kg/ volume ,so first we need to change 2.00 kg into gm, so multiply with 1000 = 2*1000= 2000gm so, the final mass is = 2000gm

13.6g/cm3 = 2000g/volume, therefore volume = 2000g/13.6g/cm³ , so gm to gm goes cancel out only cm³ will remain , the volume is 147 cm³.

so the volume of mercury at the same condition will be = 147 cm³