Very urgent more urgent then anything. urgent urgent how is a pure substance different from a mixture?a. mixtures can be separated by physical means. b. pure substances are made up of mixtures. c. a pure substance is heterogeneous. d. a mixture is made of one substance.

Which statement correctly describes the current in a circuit that is made up of any two resistors connected in parallel with a battery? a. the current in the battery and in each resistor is the same b. the current the battery equals to the sum of the currents in the resistors c.the current in the battery is less than the current in either resistor d. the current in the battery equals to the product of the currents in the resistors