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A solution that has a K+ concentration of 5.00ppm is to be prepared from solid KCl. Assuming a solution density of1.000g/mL how many miligrams of KCl must be added to make 1.00L solution?
Molar mass of K: 39.10g/mol
Molar mass of KCl: 74.55g/mol
What is the pH of the benzoic acid solution prior to adding sodium benzoate? Express answer using 3 significant figures. 2. How many grams of sodium benzoate should be added to prepare the buffer?
If 20.0 dm3 of methane, CH4, react with 200.0 dm3 of air at STP, calculate the dm3 of carbon dioxide gas produced.
A bottle containing 305 g of cleaning solution is used for carpets. If the cleaning solution has a specific gravity of 0.850, what volume of solution was used?
Organic chemistry, When 2-butene reacts with hydrogen chloride gas, only one product is detected, whereas when 1-butene reacts similarly
Calculate the [H3O+], pH, and the fraction of dissociation (α) in an aqueous 0.140 M NH3 solution. (Hint: You will need the Ka, located in the back of your textbook.)
ethoxypropan-2-ol can be made by the ring opening of an epoxide when sodium ethoxide in ethanol-water is used. A) Draw the skeletal structure of (R)-1-ethoxypropan-2-ol.
25.0 mL of ethanol (density = 0.789 g/mL) initially at 5.4°C is mixed with 34.6 mL of water (density = 1.0 g/mL) initially at 25.3°C in an insulated beaker. Assuming that no heat is lost, what is the final temperature of the mixture?
Imagine a silica microsphere half of which is coated with a thin gold coating and having a trimethylammoniumpropanethiol molecule anchored to the gold.
A molecule of chlorine dioxide (ClO2) at 25oC has a velocity of 306 m/s. What is the kinetic energy in joules of the molecule at this temperature?
The reactant concentration in a zero-order reaction was 9.00×10-2M after 175 s and 4.00×10-2M after 325 s. What is the rate constant for this reaction?
What holds solids or liquids and carries out reactions? what is used to mix or combine two or more substances? what it used to support an iron ring or clamp?
what is the molar mass of the unknown liquid in g/mole?
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