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For the 488 nm wavelength, a krypton laser produces 5 mW (milli-watts) of power. How many photons of 488 nm light does the laser produce in one second?
For the 488 nm wavelength, a krypton laser produces 5 mW (milli-watts) of power. How many photons of 488 nm light does the laser produce in one second?
Which are the product(s) of this chemical reaction?
FeCl3 + 3NH4OH
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A 10.0 mL sample of H₂SO₄ was exactly neutralized by 13.5 mL of 1.0 M KOH. What is the normality of the H₂SO₄?
2. A carbonate buffer of pH 10 is needed by a chemist. How many grams of Na2CO3 is needed to dissolve in 1.5L of 0.2M NaHCO3 to make the buffer? Ka of HCO3- = 4.7 x 10-11
If the pH of a substance is 4, what will the pOH be?
calculate the heat required to boil 325 g of water
If the hydrogen ion concentration of an unknown solution is 4.56E-7, what is its pH and will this form an acid or a base?
5.A balloon has a volume of 2.25 L when the temperature is 400C. What will be the volume if the balloon is cooled to 120C? Assume the pressure to be constant.
4. A 2.5 litre sample of a gas is heated from 250 C to 550C at constant pressure. Compute the volume at the higher temperature?
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#339914 on Dec 2023