Classify each of the following as a pure substance, a mechanical mixture, or a solution. Soil, Perfume, Baking powder, Glass cleaner.

In a molecule of methane, carbon (having four valence electrons) binds to four hydrogen atoms. how many lone pairs of electrons will be represented in the lewis structure of methane? a. four b. two c. one d. zero

2 A + 3 B Right arrow 4 C + 5 D In the first 120 s of the given reaction, 0.500 moles of B disappear. In that time period, what is the rate of appearance of C in mol/min?

A balloon's internal pressure is 1.25 atm, and its volume is 2.50 L. If the balloon is taken to the bottom of the ocean (pressure = 95.0 atm), what would be its new volume? Assume that the temperature does not change.

How is the modern periodic table different from Dmitri Mendeleev's table?

Метан А бензол Б анилин

Which is most likely the result of millions of metal atoms crowding together so that molecular orbitals become combined? A. the loss of metallic propertiesB. the formation of bands in a crystalC. the loss of valence electrons to other atoms D.

Which particles can be stopped by human skin?) alpha and beta particles only alpha particles alpha and gamma particles beta and gamma particles

How might you identify hydraulic system

About how many elements are found on the periodic table? Question 8 options: 25 50 110 200

If JM = 5x - 6 and LM = 2x - 6, which expression represents JL?