You need to make 500mL of a 0.40 M solution of sodium hydroxide the only available solution is 1.0 M determine how to make the needed dilution

Which real-world scenarios below represent physical and chemical changes? -running a car -exploding fireworks -mixing water and powdered drink mix -combining oil and vinegar to make salad dressing -taking aspirin for a headache -diluting bleach with water-digesting dinner-spreading peanut butter on bread

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?

Water undergoes a large change in density at 0 ∘ c as it freezes to form ice. calculate the percent change in density that occurs when liquid water freezes to ice at 0 ∘ c given that