1. Carmen va al mercado y compra 380g de frejoles, 2.8 kg de azúcar y 80 oz de chocolate ¿Cuántas libras lleva en su canasta? 2. Martha compra un quintal de arroz y media de papa ¿Cuántos kg tiene en los dos productos?
3. Saray y Arom son mellizos. Cuando nacieron, Saray pesaba 630 gramos más que Arom. Sus pesos ya se han igualado, gracias a que Arom come muchísimo. Sabiendo que al nacer Arom pesaba 2.25 kilos ¿Cuánto pesaba Saray al nacer?
4. Carlos va al supermercado y encuentra 2 tortas, una de chocolate de 2 libras y una de durazno de 900 gramos ¿Cuál de las tortas tiene mayor masa?

A3.37-mg sample of protein was chemically digested to convert its nitrogen into ammonia and then diluted to 100.0 ml. then 10.0 ml of this solution was placed in a 50-ml volumetric flask and treated with 5 ml of phenol solution plus 2 ml of sodium hypochlorite solution. the sample was diluted to 50.0 ml, and the absorbance at 625 nm was measured in a 1.00-cm cuvette and found to be 0.486. for reference, a standard solution was prepared from 10.0 mg of nh4cl (molar mass = 53.49 grams/mole) dissolved in 1.00 l of water. then 10.0 ml of this standard was placed in a 50-ml volumetric flask, treated in the same manner as the unknown, and the absorbance found to be 0.323. finally, a reagent blank was prepared using distilled water in place of unknown, it was treated in the same manner as the unknown, and the absorbance found to be 0.076. calculate the weight percent of nitrogen in the protein.

Iam hoping to create 5.72 grams of glucose. the plant was given 4.75 liters of co2 and 2.81 g of h20. which reactant was the limiting reagent? how much excess mass did we have of the other reactant?

In the experiment you asked to react hydrochloric acid and with sodium hydroxide. when measuring the volume of the reactants, which instrument would give the greatest precision.