Answer:
This question appear incomplete
Explanation:
This question appear incomplete because an equation to show the production of sodium chloride from calcium chloride should have been illustrated. However, if the balanced chemical equation showing sodium chloride (NaCl) been a product of a reaction involving calcium chloride (CaCl₂) as a reactant (shown below) is to be used, then we start by writing a complete balanced chemical equation
CaCl₂ + Na₂CO₃ ⇒ CaCO₃ + 2NaCl
From the equation above, it can be deduced that 1 mole of CaCl₂ is required to produce 2 moles of NaCl, thus how many moles of CaCl₂ will be required to produce 6.5 moles of NaCl.
1 mole of CaCl₂ = 2 moles of NaCl
? moles of CaCl₂ = 6.5 moles of NaCl
cross multiply
? moles of CaCl₂ = 6.5 × 1/2
? moles of CaCl₂ = 3.25 moles of CaCl₂
3.25 moles of CaCl₂ will be needed to produce 6.5 moles of NaCl
<u>Answer:</u>
<em>Actual temperature for the given temperature with thermometer with error of 6.5% is 63.8 degrees.</em>
<u>Explanation:</u>
The percentage error in thermometer is 6.5% this means that if the temperature is 100 degrees the thermometer shell show 106.5 degrees. now calculating the <em>actual temperature of the thermometer when the given temperature is 68°</em>
<em>Applying unitary method for solution 106.5</em>
Then 100 will be
= 
= <em>63.8 Degrees</em>
<em>On solving the value of this equation will give the actual temperature as 63.8 Degrees .</em>
The answer is because like electric charges do not attract with each other. Ions either lack or have excess electrons in their atomic structure. Ions with a positive charge are called cations. They lack electrons in their atoms so they have to pair up with negatively charged ions, called anions, because they have excess electrons. Together, they form a compound that is neutral.
Answer:
The equilibrium vapour pressure of a liquid is the pressure exerted by a vapour in a closed vapour and gas system which is in thermal equilibrium.
It is measured using a simple manometer
Explanation:
When liquid and vapour are in a closed container, the molecules of the liquid and vapour at a certain temperature, will attain thermal equilibrium. this means that there is no net transfer of heat between the bodies. The pressure exerted by the vapour on the liquid at this point is called the equilibrium vapour pressure.
To measure the equilibrium vapour pressure, the instrument used is a manometer. To use this, a sample of the liquid is dropped in a sealed flask connected to a manometer, and the increase in the pressure of the system is monitored as the fluid evaporates. This increase in pressure is known as the vapour pressure.
Answer:
0.5 or .5
Explanation:
The answer to number 3 is 0.5 and here's why:
you have to divide the voltage by the resistance right so you would divide 1.5 by 3 to get 0.5
