One difference between mixtures and pure substances is that A) mixtures can be physically separated. B) mixtures are made of one type of atom. C) pure substances have no chemical bonds. D) pure substances can be physically separated.

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When methanol, CH 3 OH, is burned in the presence of oxygen gas, O 2, a large amount of heat energy is released. For this reason, it is often used as a fuel in high performance racing cars.

Ladybugs eat aphids on plants. Ajoy counts the number of ladybugs in one square meter of his garden. To estimate the number of ladybugs in the entire garden, Ajoy needs the dimensions of the garden. ladybug life span. number of plants in the garden.

What does d represent in the equation below? m = M + 5 log (d/10) A. luminosity B. spectral class C. diameter of a star D. distance to a star

Write a balanced equation for the complete combustion of propane, C3H8. Do not enter phase symbols. Enter the alkane formula as C3H8.

Draw the condensed structural formula for the ammonium salt formed when lidocaine reacts with hcl.

Where might you find a temperature of 2 kelvin? a. north poleb. the equatorc. earth's cored. the coldest regions of outer space

A blank is a coil of wire that produces a magnetic field when it carries an electric current

What is the change in heat energy when 132g of copper at 32.2°C is raised to 45.0oC? The specific heat of copper is 0.385 J/g °C.

Polar covalent bonds are formed when the electrons in the bond are not shared equally between the two nuclei. which one of these molecules contains polar bonds?