5.499 g of NaCl is formed if 5.00 g of pure Na2CO3 is treated with HCl solution
The equation of the reaction is;
2HCl + Na2CO3 ----->2NaCl + H2O + CO2
Molar mass of Na2CO3 = 2(23) + 12 + 3(16) = 46 + 12 +48 = 106 g/mol
The number of moles of Na2CO3 in 5.00 g of pure Na2CO3 = 5g/106 g/mol
= 0.047 moles
From the reaction equation;
1 mole of Na2CO3 yields 2 moles of NaCl
0.047 moles of Na2CO3 yields 0.047 × 2/1 = 0.094 moles
Molar mass of NaCl = 23 + 35.5 = 58.5 g/mol
Mass of NaCl = 0.094 moles × 58.5 g/mol
Mass of NaCl = 5.499 g of NaCl
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The gas is disposed proportional to the temperature to pressure of the particles
The persistence of vision is regarded as an optical illusion but it is actually part of human physiology.
<h3>What is persistence of vision?</h3>
The term persistence of vision is the idea that an object is able to remain is sight for a long time even when the object has been removed. This is often used by performers to create a remarkable impression on the audience. The persistence of vision is regarded as an optical illusion but it is actually part of human physiology.
The way that a performance can be designed to make the audience to know that this is the most important scene is called follow through.
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Answer:
(A) fossil is the most useful.
It serves as an index fossil. The seashell is a great index fossil because it only appears in the sandstone layer in multiple locations in the same layer of time.
Explanation:
Answer:
Maximum gravitational Force: 
Explanation:
The maximum gravitational force is achieved when the center of gravity are the closer they can be. For the spheres the center of gravity is at the center of it, so the closer this two centers of gravity can be is:
bowling ball radius + billiard ball radius = 0,128 m
The general equation for the magnitude of gravitational force is:
Solving for:
The result is:
