Hola, podrían reseolverme estos problemas? Principalmente el último. Gracias

1. Al mezclar una disolución acuosa de CaCl2 con otra de AgNO3 se forma un precipitado de cloruro de plata:

Se mezcla un volumen de 15,0 ml de una disolución 0,30 M de CaCl2 con 30 ml de una disolución 0,05 M de AgNO3. Calcula los gramos de AgCl que precipitarán.
2. Determina el grado de pureza de un mármol (CaCO3) si al descomponerse 125 g del mismo se desprenden 20 litros de dióxido de carbono medidos a 15 ºC y 1 atm.
3. A partir de 120 g de KClO3 se obtuvieron a 18 ºC y a la presión de 740 mmHg, 20 L de oxígeno. ¿Cuál fue el rendimiento de la reacción?

4. Para la obtención de bromobenceno se hacen reaccionar 300 cm3 de benceno (d = 0,89 g/cm3) en exceso de bromo.

Determina la masa de bromobenceno obtenido si el rendimiento de la reacción es del 65 %.

An alcohol thermometer makes use of alcohol's changing in order to measure temperature. as the temperature goes up, the alcohol contained in the thermometer increases in volume, filling more of the thermometer's tube.

Quickly! brainliest if two people answer! 1. the blood has red blood cells, white blood cells and platelets. red blood cells carry oxygen to other cells in the body. cells need oxygen to live. white blood cells destroy certain germs. they protect our bodies from disease. which question is answered in this paragraph? (a) what is the role of blood vessels? (b) what type of cells are attached to bones? (c) what type of blood cell to clot your blood? (d) what are the different types of blood cells? 2. which sentence from the section "stem cells" best explains the role of stem cells? (a) when one kind of cell stops working, stem cells can . (b) they can turn into that cell and take its place. (c) scientists are studying new ways to use stem cells. (d) these cells can people heal faster. 3. read the selection from the section "nerve cells." nerve cells send messages to the rest of our bodies. these messages move between the brain, spinal cord and various organs. nerve cells are also called neurons. fill in the blank. a "neuron" is a (a) cell that moves information from the brain to other parts of the body (b) stem cell that has both an axon and a dendrite (c) cell that controls the fingers of a body (d) cell that makes up the spinal cord 4. some muscles in our body move without us telling them to. these are called involuntary muscles. some examples are the cardiac muscle cells inside the heart. these cells the heart relax and fill with blood. what is the best definition of "involuntary" based on the context clues? (a) something that happens on its own (b) trying hard to do something (c) something moving back and forth (d) easily moved

Which of these best describes an ionic bond?