HRS - Ask. Learn. Share Knowledge. Logo

Questions in chemistry

[Done] What is 409,614 rounded to the nearest thousand?

[Done] How does Earth's atmosphere make conditions on Earth suitable for living things?

[Done] Compare and contrast: How is a solution of salt and water different from a mixture of salt and gravel?

[Done] Is aluminum foil a compound, element, or mixture?

[Done] For a chemical reaction, it is usually found that the reaction rate is faster at higher temperatures. The rate increases because: (a) The concentrations of reactants increase. (b) More reactants collide with energy equal to or greater than the activation energy. (c) The concentrations of products increase. (d) The volume expands and there is more room for new compounds (products) to form.

[Done] With a manual transmission, the speed of the vehicle determines which gear should be engaged.

[Done] Is water a compound?

[Done] Which shares the same phylum as the hawk? A. Fungi B. Whale C. Jellyfish D. Sunflower

[Done] An aluminum engine block has a volume of 4.77 L and a mass of 12.88 kg. What is the density of the aluminum in grams per cubic centimeter?

[Done] Which of the following is true of an electrolytic cell? A. An electric current causes an otherwise non-spontaneous chemical reaction to occur. B. Reduction occurs at the anode. C. A spontaneous electrochemical reaction produces an electric current. D. The electrode to which the electrons flow is where oxidation occurs. E. None of the above.