How many grams of na2co3 are contained in 0.400 l of 0.250m na2co3?

There is a single path for electrons. the current decreases when additional resistors are added. the current will be the same in each resistor. these statements best describe a(n) circuit.

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

Select the correct answer. wax is a nonpolar substance. in which type of substance is it most soluble?