Please answer the questions below to three significant figures. a) What mass of KCI is required...
Please answer the questions below to three significant figures. a) What mass of KCI is required to make 48.0 mL of a 0.140 M KCl solution? g KCI b) How many moles of potassium ions are present in the solution? mol
Please answer the questions below to three significant figures. a) What mass of KCl is required to make 44.0 mL of a 0.270 M KCl solution? .......... g KCl b) How many moles of potassium ions are present in the solution? ........ mol
Please answer the questions below to three significant figures. a) What mass of KCl is required to make 59.0 mL of a 0.260 M KCl solution? 1 g KCl b) How many moles of chloride ions are present in the solution?
Change these numbers to the correct amount of significant figures based on the information given. Table A. Enthalpies of Solution Initial Final molar mass moles volume mass of ΔΤ temp temp (C) AHsoln of solute of solute Solute of water (OC) (kJ/mol solute) (°C) (9) (g/mol) solute (mL) 110.98 100. 2.5 - 85 25.2 22.7 0.0123 1.3661 CaCl2 100 74.55 17 -1.8 18.9 20.7 0.0438 3.2689 KCI Table B. Enthalpy of Reaction AHom Final Initial moles volume of volume of...
someone please answer these questions :) 304 (94) + Pb (at) - 1604 is) c) List the spectator ions for the reaction Ng_t() 2N05 (ag) –7 M7410g) + 2ND:5194) Complete the following problems 1) For the reaction: 2KCIO: - 2 KCI + 3 Oz a) If 4.6 mole of KCIO, decomposes, how many moles of oxygen gas will be produced? b) If 0.25 mole of oxygen gas is produced, how many moles of KCl is formed? c) If 2.72 g...
please answer wuestions 7-9 sed as a medication to treat a ac arrest (Figure 11.39). This Calculations The concentration, or the amount of solu amount of solution mount of solution at a given temperature and pressure. The amount of solute dissolved in a given regularly quantified when working in o when working in a scientific context or hospital sing. Epinephrine, for example, is used as a medication 10 number of conditions including cardiac arrest (Figure 11.571 medication is distributed as...
please answer all, and type please Problems and questions (show all calculations, correct significant figures and units) 1. Why is it important to test the crucible for cracks before heating it? 2. Write the correct balanced equation for the dehydration (removal of water) of the magnesium sulfate hydrate obtained in Procedure B of this experiment. 3. How many moles are in 70.0 grams of potassium hydroxide? 4. A compound is formed when 0.300 moles of barium combine with 0.600 moles...
Express your answer to three significant figures and include the appropriate units, The formula of Benadryl is C17H21NO. How many moles of C are present in 0.752 moles of Benadryl? How many moles of H are present in 2.20 moles of Benadryl? How many moles of N are present in 1.64 moles of Benadryl?
DATA TO BE USED Please use the data provided below to complete this assignment. Refer to Expt. 7 in the laboratory manual for an explanation of the data. o Mass used to prepare 5.0 g/L sodium sulfate solution: 0.494 g o Mass used to prepare 0.025 M sodium sulfate solution: 0.351 g o Mass used to prepare 2.0 mM sodium sulfate solution: 0.025 g o Conductivity (in uS/cm) for 5.0 g/L and 0.025 M and 2.0 mM sodium sulfate solutions...
please show work 17) When 200, mL of water are added to 100. mL of 12 % KCl solution the final concentration of KCI is (Assume the volumes add.) A) 12% B) 4.0% C) 36%. D) 6.0% E) 8.0% 18) What is the molarity of a solution containing 5.0 moles of KCI in 2.0 L of solution? A) 2.5 M B) 1.0 M C) 5.0 M C) 10. M E) 2.0 M 19) What is the molarity of a solution...