The Chemical change that occurred was the vinegar and baking soda creating gas or air bubbles. While the vinegar and baking soda are losing their mass, the gas created from the chemical reaction is filling in those gaps so the mass of the structure is the same before and after the experiment was conducted.
When a cold front occurs from a cold air mass moving into a warm air mass, the warm air is forced upward. When warm air rises, it cools, and since cool air can't hold as much moisture as warm air, the water in the air gets forced out, which is what creates clouds.
Use PV = mRT/M and solve for R. R = PVM/RT. Since you have the same gas under two sets of conditions then you can write
<span>P1V1M1/m1T1 = P2V2M2/m2T2 </span>
<span>Since P, M and T are constant, the equation becomes </span>
<span>V1/m1 = V2/m2 </span>
<span>Now plug in your values and solve for V2</span>
Answer: There are 0.499 moles present in molecules of Boron trichloride.
Explanation:
According to mole concept, there are molecules present in 1 mole of a substance.
Hence, number of moles present in molecules are as follows.
Thus, we can conclude that there are 0.499 moles present in molecules of Boron trichloride.
0.25 moles of CO2 is present in 11 grams of CO2.
Explanation:
A mole represents the number of chemical entities in an element or molecule.
Number of moles of an element or molecule is determined by the formula:
The Number of moles (n) = weight of the atom given ÷ atomic or molecular weight of the one mole of the element or molecule.
Themolar mass of one mole of carbon dioxide is:
12+ ( 16×2)
= 44 gram/mole
The given weight is 44 grams of carbon dioxide.
Putting the values in the equation,
n= 11 gms÷44 gms/ mole
n = 0.25 mole