Other Chemistry Answers

Question 4 : Anthropogenic contribuion to desertification excludes _________
overgrazing
bush burning,
depletion of resources
land management
Question 9 : Burning of fossil fuel contributes _______ of carbon dioxide to the atmosphere.
0.7
0.5
0.6
0.8

which property of an element is not variable?

3×10^8. Photoshop a certain light radiation are found to produce 1.5 j. Calculate wavelength

The figure below shows the mass spectrum of lead as obtained from the mass spectrometer:

a) Calculate the relative atomic mass of lead.
b) State and explain the number of isotopes in natural lead.

State the charecteristics of gas used to supply oxygen cylinders through hospitals

Why oxygen is a gas?

Balance the following redox reaction. When this equation is properly balanced, using the smallest whole-number coefficients, what are the coefficients on each substance?


Al(s) + Cu2+(aq) → Al3+(aq) + Cu(s) unbalanced


A.
2,6,3,6

B.
2,3,2,3

C.
3,3,2,2

D.
3,2,3,2

E.
1,6,1,6

Why a saturated solution cant dissolved anymore solute?

How does the resilience requirement of a soft liner differ from that of a mouth guard used in contact sports, such as boxing? Explain your answer using a resilience versus temperature plot for each material, marking the relative position of mouth temperature on each plot. Explain, at a molecular level, why the materials perform differently. [6]

The chemical formula for potassium chlorate is KClO3. What is the weight of the Cl (chlorine) in 13,664 grams of potassium chlorate? (Atomic weights: K; 39; Cl, 35; O, 16)