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प्रश्न
What is the SI unit of mass? How is it defined?
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उत्तर
The SI unit of mass is kilogram (kg). 1 Kilogram is defined as the mass equal to the mass of the international prototype of kilogram.
संबंधित प्रश्न
Pressure is determined as force per unit area of the surface. The SI unit of pressure, Pascal is as shown below:-
1Pa = 1N m–2
If mass of air at sea level is 1034 g cm–2, calculate the pressure in Pascal.
A measured temperature on Fahrenheit scale is 200 °F. What will this reading be on Celsius scale?
The density of 3 molal solution of \[\ce{NaOH}\] is 1.110 g mL–1. Calculate the molarity of the solution.
Volume of a solution changes with change in temperature, then, will the molality of the solution be affected by temperature? Give reason for your answer.
Assertion (A): Combustion of 16 g of methane gives 18 g of water.
Reason (R): In the combustion of methane, water is one of the products.
A vessel contains 1.6 g of dioxygen at STP (273.15K, 1 atm pressure). The gas is now transferred to another vessel at constant temperature, where pressure becomes half of the original pressure. Calculate volume of the new vessel.
0.27 g of a long-chain fatty acid was dissolved in 100 cm3 of hexane. 10 mL of this solution was added dropwise to the surface of the water in a round watch glass. Hexane evaporates and a monolayer is formed. The distance from the edge to centre of the watch glass is 10 cm. What is the height of the monolayer?
[Density of fatty acid = 0.9 g cm−3; π = 3]
