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A chemical reaction occurs and absorbs 1720 J. How many calories is this? Is it an exothermic or endothermic reaction?
In a manometer the mercury level at the open end of the tube is 215 mm higher than at the closed end of the tube. If the atmospheric pressure is 1 atm.
What do you think is the basis for the selective response of a solar cell to certain wavelengths. Energy levels
A compound composed of sulfur and fluorine is found to contain 25.24% by mass of sulfur. If the molar mass of the compound is 254.11 g/mol, what is its molecular formula?
how would you know a strong acid from a weak acid without looking at some data? for example hbr hi hci are all stong
at a particular temperature k 3.75 for the following reaction.so2g no2g so3g nogif all four gases had initial
1.when we say that something gives us energy what does that mean? what is a biological definition of energy?nbsp2.what
nbspan electric heater of 100 w 1w 1 js operates for nine minutes to heat the gas in a cylinder the gas expands. at
by looking at the formula one might conclude that co would have a large dipole moment wen in fact it has a very small
What is the net ionic equation ,including phases, for the reaction of aqueous silver nitrate with aqueous potassium chloride.
What volume of pure oxygen gas (O2) measured at 546 K and 1.00 atm is formed by complete dissociation of 0.7 mol of Ag2O? 2 Ag2O(s) → 4 Ag(s) + O2(g)
An atomic emission spectrum of hydrogen shows three wave lengths : 1875 nm, 1282 nm, 1093 nm. Assign these wavelengths to transitions in the hydrogen atom. If you could just do one wavelength, that would be great.
Calculate the number of moles of CO 2
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