Answer:
68.6 m
Explanation:
Speed is defined as distance covered per unit time and expressed as
S=d/t
Where d is distance and t is speed.
Making d the subject of the above formula then
d=st
Substituting 343 m/s dor s and 0.200 s for s then
d=343*0.2=68.6 m
Therefore, the distance is 68.6 m
Answer:
Put it on a ship or an aerogel
Explanation:
You can use an aerogel, a synthetic porous ultralight material. The aerogel can support a mass many times greater than their own.
Even simpler, you can put the object on board a ship. The ship has a smaller density than water, making it float in water.
Answer: The partial pressure of the Kr is 320 mm Hg.
Explanation:
According to Raoult's Law , the partial pressure of each component in the solution is equal to the total pressure multiplied by its mole fraction. It is mathematically expressed as
where, 
= partial pressure of component A
= mole fraction of A
= total pressure
mole fraction of Krypton = 
Thus partial pressure of the Kr is 320 mm Hg
There are 12H 2Fe 15O and 3C
Answer:
4.5 M Na+
Explanation:
Multiply the molarity by the volume of the solution to get moles.
Note that there are TWO sodium ions in sodium carbonate, therefore the first-mole calculation must be multiplied by two.
Since molarity is defined as moles of ions/liters of solution, the final molarity will be the sum of the calculated moles divided by the sum of the liters of solution.
Hope this helps :)
