Write the correct word to make the statement true if it's false 1. The formation of black smoke upon combustion of hydrocarbons indicates incomplete combustion which means that the sample has a [low] C to H ratio. 2. In steam distillation, the desired substance decomposes and is obtained at a temperature [higher] than its actual boiling point.

In the laboratory you are given the task of separating Ba²+ and Fe²+ ions in aqueous solution. For each reagent listed below indicate if it can be used to separate the ions. Type "Y" for yes or "N" for no. If the reagent CAN be used to separate the ions, give the formula of the precipitate. If it cannot, type "No" Y or N Reagent Formula of Precipitate if YES 1. HBr 2. 3. K₂SO4 K₂CO3

A solution is prepared by pipetting 25.00 mL of 3.0 x 10-4 M CaCl2 into a 750.00 mL volumetric flask and then adding water to the calibration mark. What is the concentration?

100 90 NANO 80 70 CaCl, Pb(NO,)2 60 50 40 KCI NaCI 30 20 KCIO, 10 Ce,(SO); 10 20 30 40 50 60 70 80 90 100 Temperature (°C) How many grams of CaCl2, are soluble in 100 g of water at approximately 17 °C? 70 grams 12 grams 58 grams O grams Solubility (g of salt in 100 g H,O) SONY K,Cr,O,

Part II. Preparation of 50 mL 0.5% NaCl solution Materials: NaCl, weighting boat, spatula, balance, 50 mL volumetric flask, distilled water, and funnel. Show calculation steps. Express the answer in gram with two decimal places. (1) How many NaCl is required to prepare 50 mL 0.5% NaCl solution? (2) Carefully transfer the calculated amount of NaCl in the volumetric flask, and dissolve it in approx. 40 mL distilled water. (3) Stopper the volumetric flask. Mix until the NaCl is dissolved. (4) Add distilled water to the mark. Mix well. (5) Transfer the prepared reagent into a labelled container. Part III. Preparation of 50 mL 0.2M CuSO4 solution Materials: CuSO4-5H₂0, weighting paper, spatula, balance, 50 mL volumetric flask, distilled water, and funnel. Show calculation steps. Express the answer in gram with two decimal places. (1) How many grams of CuSO4.5H20 is required to prepare 50 mL 0.2 M CuSO4 solution. 1 mole of CuSO4-5H₂0 equals to: Equation: Calculation: (2) Carefully transfer…

ds NURSE IN THE MAKING M OF THE MOST COMMON TIONS SEEN ON THE NCLEX ! TUL O SIMPLE REACTIONS Predicting the products of dissolution The names and chemical formulae of some chemical compounds are written in the first two columns of the table below. Each compound is soluble in water. Imagine that a few tenths of a mole of each compound is dissolved in a liter of water. Then, write down in the third column of the table the chemical formula of the major chemical species that will be present in this solution. For example, you know water itself will be present, so you can begin each list with the chemical formula for water (H₂O). -6 Note: "major" chemical species are those present in concentrations greater than 10 compound iron(III) bromide sodium cyanide sucrose Explanation TUL formula FeBr3 Na CN C12H22011 Check TUL Last 4 secil 7594 TXDP Priven 24 major species present when dissolved in water 0 Cera 0 0 pu Welona You got this !!! 5 Carlos de linn SalesAssets@vivint.com com X mol/L. 0₁ 5…

What is the effective mass yield for the reaction shown? The density of ethyl L-lactate is 1.03 g/mL. Round your answer to the nearest whole number.

4. H2, Lindlar's catalyst

In the laboratory you are given the task of separating Ag* and Fe* ions in aqueous solution. For each reagent listed below indicate if it can be used to separate the ions. Type "Y" for or "N" for no. If the reagent CAN be used to separate the ions, give the formula of the precipitate. If it cannot, type "No" yes Y or N Reagent Formula of Precipitate if YES 1. HBr 2. K2SO4 3. КОН

Here is a graph of the molarity of acetonitrile CH3CN in a reaction vessel during a certain chemical reaction. Use this graph to answer the questions in the table below