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Suppose that the microwave radiation has a wavelength of 10.7 cm. How many photons are required to heat 200. mL of coffee from 25°C to 65°C?
Write the balanced net ionic equations for each of the following compounds with aqueous NH4OH 1. HCl (aq) 2. H2SO4 (aq) 3. HNO3 (aq) 4. NaOH (aq)
Calculate how many whole drops (.05 mL/drop) of 6 M HCl are required to dissolve this. (I found this to be 11.59 drops
A sample of hydrogen gas was collected over water at 36°C and 855 mm Hg. The volume of the container was 6.50 L. Calculate the mass of H2(g) collected. (Vapor pressure of water = 44.6 torr at 36°C)
An enclosure of volume 0.398 L has a partial pressure of O2 of 3.50 10-6 torr at 30.°C. What mass of magnesium will react according to the following equation. 2 Mg(s) + O2(g) → 2 MgO(s)
a solid block of exactly 100.0 cm3 has a mass of 153.6g. Determine its density. will the block sink or float in water
All ammonium compounds, that comprise the ammonium ion (NH4+) and negative ion, are thermally unstable. Explain two ways that ammonium compounds decompose when they are heated.
On average, cow milk is 4.7%(w/w) lactose. The molecular weight of this disaccharide is 342.3g C12H22011. Assuming milk has the density of water.
It takes 54.0 J to raise the temperature of an 8.00 g piece of unknown metal from 13.0rm ^circ C to 24.5^circ{C}. What is the specific heat for the metal?
how many moles of HNO3 are present in 33.0 mL of a 4.70M solution ?
A bottle containing 315 g of cleaning solution is used for carpets. If the cleaning solution has a specific gravity of 0.850, what volume of solution was used?
Calculate the mass of silver chloride required to plate 245 mg of pure silver. Silver chloride, often used in silver plating, contains 75.27% Ag
What is the percent by mass of NaHCO3 in a solution containing 80 g of NaHCO3 dissolved in 600 mL of H2O?
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