The kinetic energy of the ball b is 12.3kJ and ball B to a is 14.2kj
Answer:
The molarity of a 50.0 ml aqueous solution containing 10.0 grams of table sal, Nacl, is 3.42
Explanation:
Molarity is a unit of concentration based on the volume of a solution and is defined as the number of moles of solute per liter of solution. Then, the molarity of a solution is calculated by dividing the moles of the solute by the liters of the solution.
Molarity is expressed in units ().
Then you must know the amount of moles of the NaCl solute. For that it is necessary to know the molar mass. Being:
-
Na: 23 g/mole
- Cl: 35.45 g/mole
the molar mass of NaCl is: 23 g/mole + 35.45 g/mole= 58.45 g/mole
Then a rule of three applies as follows: if 58.45 grams are present in 1 mole of NaCl, 10 grams in how many moles will they be?
moles= 0.171
So you know:
- number of moles of solute= 0.171 moles
- volume= 50 mL= 0.05 L
Replacing in the definition of molarity:
Solving:
Molarity= 3.42
<u><em>The molarity of a 50.0 ml aqueous solution containing 10.0 grams of table sal, Nacl, is 3.42 </em></u><u><em></em></u>
Answer:
(i),(ii) and (iv)
Explanation:
Villi are finger-like outgrowths of the human intestine.
The main role of villi is to amplify surface area for rapid absorption of digested food. They have very tiny walls; the role of these walls is to pass digested nutrients through diffusion. These are directly connected to the blood vessels. Thus, the circulating blood can carry these nutrients away.
The correct answer is the first option.
Answer:
Shenzi
Banzai
Ed
Scar
Simba
Timon
Pumbaa
Explanation:
they don't make their own food but get it from other organisims
Answer:
12: This is decomposition because nitrogen triiodide is breaking apart.
13: This is double displacement because the elements in the compounds are "switching".
14: This is synthesis because the water and carbon dioxide are combining.
15: This is also synthesis because the hydrogen and oxygen are combining.
16: This is single displacement because the sodium is "switching" the element it's bonding with.