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1. What's the mass of sodium oxide produced if 1.5 g of sodium reacts with excess gaseous oxygen? (Write the balanced equation.)
2. Hydrochloric acid reacts with aluminium to form aluminium chloride and gaseous hydrogen. What's the mass of aluminium required to produce 1.0 kg of aluminium chloride if there is excess acid?
3. 2KMnO4 + 5H2SO3 ? K2SO4 + 2MnSO4 + 2H2SO4 + 3H2O
Calculate the mass of:
a. sulphurous acid, H2SO3, required to react with 3.16 g of potassium permanganate, KMnO4
b. manganese (II) sulphate produced when 5.65 g of potassium permanganate react with excess sulphurous acid
c. potassium permanganate required to produce 5.00 g of manganese (II) sulphate.
4. Calculate the mass of 80% pure aluminium required to produce 9.65 kg of aluminium oxide.
In a flame test experiment, sodium gives the brightest and most persistent color in the flame. Do you think that potassium could be detected visually in the presence of sodium
When talking about Hydroxyquinone, BHT and BHA as radical inhibhitars, they are commonly additives to foods such as Crystal Light. (BHA:to help protect flavor). How do these molecules function as radical inhibitors. Show how these molecules interc..
Silver consists of two major isotopes with the following percent abundances and atomic masses: 107Ag (51.84% and 106.90509 amu) and 109Ag (48.16% and 108.90476 amu). Calculate the average atomic mass of silver to five significant digits.
After you have added 1 N HCl to adjust the pH of the Tris solution to 8.1, what is the ratio (in mmols) of Tris to Tris-HCl in the resulting buffer solution
A student used 20.0 mL of 0.1035 M NaOH to titrate 20 mL of orange juice. How many grams of citric acid were present in the sample? The molar mass of citric acid, H3C6H5O7, is 192.12 g/mol.
How many milliliters of 0.20M NaOH do you need to neutralize 40.0 ml of 0.12M acetic acid?
What is the ratio of the conjugate base concentration to the acid concentration, that is, [B- ]/[HB] when the indicator switches to the acidic color
A scientist wants to make a solution of tribasic sodium phosphate, , for a laboratory experiment. How many grams of will be needed to produce 250 of a solution that has a concentration of ions of 0.700
If solar radiation is 1200 W/m^2 , how many photons strike the leaf every second? Assume three significant figures and an average wavelength of 504 nm for solar radiation. A green leaf has a surface area of 2.75 cm^2 .
calculate the heat released when 2.57 l of cl2g with a density of 1.88 gl reacts with an excess of sodium metal at
What is the heat of reaction (kJ) per mole of acid? Assume the mixture has a specific heat capacity of 4.18 J/(g·K) and that the densities of the reactant solutions are both 1.00 g/mL.
A molecule of glucose contains 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms. Which is the correct formula.(a) 6CH20 (b) (CH2O)6 (c) C6H12O6 (d) C6(H2O)6
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