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The oldest oceanic crust is about 200 million years old. The average age of continental crust is about 2 billion years old. Why is this? What does this tell us about the differences between plates topped by continental crust and plates topped by oceanic crust? How do the two types of plates interact?
For the number of moles of oxygen gas collected, how many moles of hydrogen peroxide decomposed. Be sure to take into account water vapor pressure 14mL of Oxygen gas was collected.
reaction takes place in acidic solution, \rm H_2O{(l)} and \rm H^+{(aq)} will be involved in the reaction. Places for these species are indicated by the blanks in the following restatement of the equation
which is a base that has a pKb=5.9 and FW= 121.1g/mole 1) what mass of A do you need? 2) what type of reagent do u need to add? 3) what ratio of the base to its conjugate acid is present in the final buffer
How many proton for H? Electron?what is DNA made of in the human body?
Explain what molar ratio of HPO4 2- to H2PO4 - in solution would produce a pH of 7.0? Phosphoric acid (H3PO4) a triprotonic acid has pKa values- 2.14, 6.86, and 12.4. Merely one of the pKa values is relevant here.
Problem- Find the absolute and percent relative uncertainty and express each answer with the correct number of significant figures.
Write balanced net ionci equations for the following electrolysis reactions using platinum electrodes 1. aquos potassium fluoride
Consider the combustion reaction between 30.0mL of liquid methanol ( density = 0.850 g/mL) and 15.0L of oxygen gas measured at STP. The products of the reaction are CO2 and H2O
if the sealed-tube manometer shown below had a height difference of 20.5 inches between the mercury levels what is the
Write the half reactions and the net cell reaction for the following cell. Calculate the cell potential. S.C.E. || MnO4- (aq, 0.035 M), Mn+2 (aq, 0.022 M), pH = 4.50 | Pt(s)
Why does anions only move towards anode and cations only towards cathode?
What mass of carbon reacts completely with 17.8 grams of SiO2 according to the following equation? SiO2 (s) + 2C (s) → SiC (s) + 2CO (g)
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