Your answer is choice C. That is solid sodium chloride never dissolves to form sodium ions and chloride ions.
Going further to explain, have a look at the question again, we are told that James Proton prepares a saturated solution of sodium chloride in a beaker by adding solid sodium chloride and stirring.
Then when James finishes, crystals of sodium chloride are observed at the bottom of the beaker.
This implies that no more salt was dissolving since the saturation point was reached.
Again suppose he increased the temperature of the reaction, more salts could have dissolved.
Answer:
21.28 grams solute can be added if the temperature is increased to 30.0°C.
Explanation:
Solubility of solute at 20°C = 32.2 g/100 grams of water
Solute soluble in 1 gram of water =
Mass of solute in soluble in 56.0 grams of water:
Solubility of solute at 30°C = 70.2g/100 grams of water
Solute soluble in 1 gram of water =
Mass of solute in soluble in 56.0 grams of water:
If the temperature of saturated solution of this solute using 56.0 g of water at 20.0 °C raised to 30.0°C
Mass of solute in soluble in 56.0 grams of water 20.0°C = 18.032 g
Mass of solute in soluble in 56.0 grams of water at 30.0°C = 39.312 g
Mass of of solute added If the temperature of the saturated solution increased to 30.0°C:
39.312 g - 18.032 g = 21.28 g
21.28 grams solute can be added if the temperature is increased to 30.0°C.
First, we determine the number of moles of gas present using the ideal gas equation.
PV = nRT
n = PV / RT
n = (1.4 * 226.4) / (0.082 *(27 + 273.15))
n = 12.88
Next, we use the given percentages to find the moles of helium present
Moles of helium = 0.655 * 12.88
Moles of helium = 8.44
Next, we use the formula:
Mass = moles * molar mass
Mass of helium = 8.44 * 4
Mass of helium = 33.76 grams
Answer:
Amoeba: reproduces
clock: lacks genetic material
both: has defined boundary, use energy, and have an internalized organization.
Explanation:
Amoeba is a single cell organism known as amoeboid which is a eukaryotic cell and has all the eukaryotic features such as membrane-bound organelles including the nucleus. The nucleus contains the genetic material of the amoeba cells and which is transferred to the offspring by reproduction. The cell membrane is the outer boundary of the cell use energy to perform its cellular functions.
A clock is a non-living thing that contains many small parts to make it work properly and requires energy to work. It is not a living thing so does not have genetic material. However, it has a defined boundary in it.