Question

class 9 science please give me Answers fast please​

Answer 1

Explanation:

6- valency of sulphur is 2

given-valency of metal X is 3

SO3. X

2. 3

criss cross valency

formula. (SO3)3X2. ans

7- kinetic energy - energy possesses due to motion is called kinetic energy

formula for kinetic energy. - ½mv²

for example - a car moving

potential energy - energy possesses due to change in position or in shape or size is called potential energy

formula for kinetic energy - m*g*h

for example - a bird flying in the sky

8- I know only one disease

malaria which caused by Plasmodium protozoan

9-formula - no. of moles = Given mass

Molar Mass

Given mass - 3.6g

Molar Mass - H2O -atomic mass of H2 = 2x1=2

atomic mass of O = I6

Molar Mass of H2O = H2+ O

= 2+16

=18

No.of moles = 3.6g = 0.2 moles

18g

There are 0.2 moles present in 3.6g of Water

Hope this will help you . . . . . . . . . . . .

18g