Balance each of the following chemical equations. Give your answer as coefficients separated by commas. Na2S(aq)+Cu(NO3)2(aq)→NaNO3(aq)+CuS(s) Express your answers as integers separated by commas.
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Balance each of the following chemical equations. Give your answer as coefficients separated by commas.
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- A soft drink contains an unknown mass of citric acid, C3H5O(COOH)3. It requires 6.42 mL of 9.580 × 10−2-M NaOH to neutralize the citric acid in 10.0 mL of the soft drink. C3H5O(COOH)3(aq) + 3 NaOH(aq) → Na3C3H5O(COO)3(aq) + 3 H2O(ℓ) Determine which step in these calculations for the mass of citric acid in 1 mL soft drink is incorrect? Why? n (NaOH) = (6.42 mL)(1L/1000 mL)(9.580 × 10−2 mol/L) n (citric acid) = (6.15 × 10−4 mol NaOH) × (3 mol citric acid/1 mol NaOH) m (citric acid in sample) = (1.85 × 10−3 mol citric acid) × (192.12 g/mol citric acid) m (citric acid in 1 mL soft drink) = (0.354 g citric acid)/(10 mL soft drink) Determine the correct result.One of the common intravenous fluids, called physiological saline, is a homogeneous mixture of NaCl in water. In this mixture, 0.89% of the mass is contributed by the NaCl. What mass of NaCl is found in 450. mL of physiological saline? ((Density of physiological saline = 1.005 g/cm3)The physician has ordered 1.0 gg of tetracycline to be given every six hours to a patient. If your stock on hand is 500-mgmg tablets, how many will you need for one day's treatment? Express the number of tablets as an integer.
- Balance each chemical equation Na2S (aq) + Zn(NO3)2 (aq) ----> NaNO3 (aq) + ZnS(s)From the moles of magnesium hydroxide (see attached), calculate the grams of magnesium hydroxide this corresponds to (the molar mass of magnesium hydroxide is 58.305 g/mol) and then convert this to milligrams. This is how many mg of Mg(OH)2 are in the initial mass of milk of magnesia that you used. From this ratio (mg of Mg(OH)2 in grams of milk of magnesia), calculate how many mg of Mg(OH)2 are in a standard 15 mL dose of the milk of magnesia. (The density of milk of magnesia is 1.06 g/mL, use that to convert "15 mL" to units of grams.)Calcium carbonate is used in many antacids to neutralize stomach acid, as depicted by the following chemical equation: CaCO3(s) + 2 HCl(aq) → CaCl2 + H2O(l) + CO2(g) If 250. mg of calcium carbonate reacts with 2.609 g of hydrochloric acid, how much hydrochloric acid will remain? Provide your answer in g to 3 decimal places.
- A sample of 18.11 grams of sodium hydroxide is weighed out on a balance and prepared to a volume of 2.00 x 102 mL in water. What is the molarity of this aqueous solution of NaOH? Express your answer to the correct number of significant figures and include the unit with your answer.What is the mass, in grams, of 1.40×1021 molecules of aspirin, C9H8O4C9H8O4? Express your answer using three significant figures.Introduction to Chemistry: Chemical Formulas as Formulas: Converting between Grams of a Compound and Gram of a Constituent Element. Iron is found in Earth's crust as several iron compounds. Calculate the mass (in kgkg) of each compound that contains 7.1×103 kg of iron. Given: Fe2O3 (hematite) Express your answer in kilograms to two significant figures. The answer : Mass = 1.1 x 104 kg But I don't know how it got here. I keep getting 4.9 kg for my answer. Converted it to kilograms also is a challenge for me. I know that 1 g = 1000 kg and that 1 kg = 0.001 g. But i'm not sure how to apply it.
- The sugar content of a wine is determined five times, and the following results obtained: 150, 155, 155, 152 en 144 g/L. Determine with 90% confidence if the 5th value (144 g/L) must be excluded (outlier) or included (not outlier) in further calculations3i?Mass (in grams) of 1.00×10−2 molof CdS. Express the mass in grams to three significant digits. Number of moles (n) of NH4Cl in 96.6 g of this substance. Express the amount in moles to three significant digits. Number of molecules in 8.497×10−2 mol C6H6. Express the amount in molecules to four significant digits. Number of O atoms in 7.25×10−3 mol Al(NO3)3. Express the amount in atoms to three significant digits.