Liquid
Solid
Plasma
Gas
Correct answer is D
In the gas state of matter, particles are widely spaced and move freely with high kinetic energy. Gases do not have a definite shape or volume and will fill the entire available space.
Stainless steel is an alloy made up of
Iron and zinc
Copper and tin
Iron and chromium
Iron and carbon
Correct answer is C
Stainless steel is an alloy composed of iron and chromium, with small amounts of other elements like nickel and molybdenum. The addition of chromium provides stainless steel with excellent corrosion resistance.
6 liters
1.5 liters
0.75 liters
3 liters
Correct answer is C
According to Boyle's law (for constant temperature), the product of initial pressure and initial volume is equal to the product of final pressure and final volume. Therefore, (1.5 liters) × (2 atmospheres) = (new volume) × (4 atmospheres). Solving for the new volume gives us (new volume) = (1.5 liters × 2 atmospheres) / 4 atmospheres = 0.75 liters.
6.022 x 10\(^{23}\) mol\(^{-1}\)
3.00 x 10\(^8\) m/s
9.81 m/s\(^2\)
96,485 C/mol
Correct answer is D
Faraday's constant is a proportionality constant that relates the amount of electric charge (in coulombs) required to liberate or deposit one mole of substance during an electrolytic reaction. Its value is approximately 96,485 C/mol.
Which of the following methods can be used to remove temporary hardness from water?
Boiling
Filtration
sedimentation
Chlorination
Correct answer is A
Temporary hardness in water can be removed by boiling. When water is boiled, the calcium and magnesium bicarbonates decompose, forming insoluble calcium carbonate (CaCO3) and magnesium carbonate (MgCO3), which precipitate out of the water.