During which era did plants first appear on an island?

a. CenozoicB. Mesozoic

c. PaleozoicD. Precambrian

Q6. The manufacturer supplying concentrated ethanoic acid for the production of vinegar als supplied other acids. The label had come off a batch of one of these other acids. A sample of this unknown acid was analysed and found to contain 54.

Calculating equilibrium concentrations when the net reaction proceeds in reverse Concentration (M) [XY] [X] [Y] initial: 0.200 0.300 0.300 change: + x - x - x equilibrium: 0.200+x 0.300-x 0.300-x Based on a Kc value of 0.

Through photosynthesis a simple sugar is produced. where do the carbon atoms come from to produce this sugar molecule? carbonyl groups phosphate groups nadph carbon dioxide

Which low-energy state of condensed matter is characterized by structural rigidity and resistance to changes of shape or volume?

Which of these substances is not an element? a. water b. hydrogen c. aluminum d. iron

The inertness of the noble gases is due to a. the outermost shell has six electrons. b. the bonds they form with other elements. c. the number of protons and neutrons. d.

Xander is gaining weight. Which best describes what he can do to prevent obesity? exercise every day and also make healthy choices in his diet excercise once a week but make no change in his diet exercise once a week and also make healthy choices in

The town in the video stressed using locally made goods instead of imported goods. How could using locally made goods lower CO2 emissions?

Calculate the ΔHrxn for the following reaction: CH4 (g) + 2Cl2 (g) - - > CH2Cl2 (g) + 2HCl (g) Use the following reaction and given ΔH's: CH4 (g) + Cl2 (g) - - > CH3Cl (g) + HCl (g), ΔH = - 99.

Select all that apply to diffusion. A solid cannot diffuse in to another solid. Solids can diffuse in liquids. Liquids can diffuse in liquids. It is the process of intermingling atoms from one substance into another.