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A vitamin syrup for infants contains 27.44 mg of zinc sulfate monohydrate (ZnSO4.H2O) and 100.00 mg of ascorbic acid (C6H8O6) for every 5 ml.

If there are 10.00 moles of ascorbic acid, what is the mass (in grams) of ascorbic acid?

Note: Round off your answer to two decimal places.
On a certain time of day, the concentration of carbon monoxide,CO in the air over metro Manila reached 1.8x10^-5 g/l. Convert this concentration to mg/m^3
When left over a flame a marshmallow is consumed in a combustion reaction. Assuming a marshmallow is made of entirely sucrose, C12H22O11, and after combustion no residual solid remained, the following chemical equation describes this reaction.

C12H22O11(s) + 12 O2(g) → 12 CO2(g) + 11 H2O(g)

Using the chemical equation in Question 1 above, if a second marshmallow was measured and contained 6.94 g of sucrose and is the limiting reactant, what is the theoretical yield, in g, of CO2?
calculate the energy of a photon of radiation with a wavelength of 6.4 * 10^-7
Ca(CO3)(aq) + 2HCl(aq) → CaCl2(aq) + H2O(l) + CO2(g)

If 0.0600 g HCl reacts with excess Ca(CO3), what amount (in moles) of CaCl2 will be produced?
(i) Why is Sodium kept immersed in Kerosene oil? [5]
(ii) Why do ionic compounds have high melting points?

which element does not form a stable ion with the element argon


How many molecules are present in 1.8 mol of sulfuric acid (H2SO4)? (You may use scientific notation. If your correct answer is e.g. 1189 enter 1.189E+3)
The statue of Martin Luther at Martin Luther College has a base that is 3.55 m2. The concrete is beginning to crack under the force because the statue exerts a pressure of 735. Pa. What is the force cracking the concrete?
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