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Questions in chemistry
📝 Answered - What three things must happen in order for a chemical reaction to occur?
📝 Answered - Which of the following statements does not describe a physical property of a piece of chalk? A. Chalk is solid. B. Chalk can be broken into pieces. C. Chalk is white. D. Chalk will bubble in vinegar.
📝 Answered - What is the mass of 4.2 moles of sodium carbonate?
📝 Answered - Calculate the number of moles in a 14.5 gram sample of [tex]C_4H_{10}[/tex].
📝 Answered - What measurements must you make to find the density of a sample of matter?
📝 Answered - If the kinetic energy of a falling apple is 5.2 joules and its potential energy is 3.5 joules, what is its mechanical energy?
📝 Answered - Why do the particles of objects have both kinetic and potential energy?
📝 Answered - How many molecules are in 100 grams of HCl?
📝 Answered - I have an unknown volume of gas at a pressure of 0.5 atm and a temperature of 325 K. If I raise the pressure to 1.2 atm, decrease the temperature to 320 K, and measure the final volume to be 48 liters, what was the initial volume of the gas?
📝 Answered - 12. Which classification describes the Milky Way? A. Regular spiral B. Barred spiral C. Elliptical D. Irregular
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