Answer:
It should be used 2 digits to the right of the decimal point to report the result
Explanation:
When adding or subtracting two decimal numbers, the number of digits to the right of the decimal point in the result is equal to the amount with the least number of decimal places.
In this case we have 4 decimal places in 0.0136 g, 2 decimal places in 2.70 × 10-4 g and 2 decimal places in 4.21 × 10-3 g, so, the least number of decimal places is 2 and that should be the number of digits to the right of the decimal point in the result.
Then the result of the sum should be 9.66 × 10-3 g
I got 2.......................
Buffer capacity is defined as the capacity of a buffer to resist changes in pH upon addition of an acid or a base. The buffer capacity is high when the concentration of the acid and its conjugate base is high, and the pH of the solution is near the pKa value of the weak acid.
The greater the buffer capacity, the better it can resist pH changes upon addition of an acid or base. The buffer capacity of a solution is highest when the pH is near the pKa value of the weak acid.
A buffer is a solution that has the ability to resist changes in pH upon the addition of an acid or base. The buffer capacity is highest when the pH of the buffer is close to the pKa of the weak acid component in the buffer. Therefore, the buffer capacity is the highest when the pH is equal to the pKa value of the weak acid.
Therefore, the solution with the greatest buffer capacity is the one with the highest concentration of both the weak acid and its conjugate base, which can resist the changes in pH with the addition of an acid or base.
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Answer:
Barium Nitrate ( Ba(NO3)2 ) is an Ionic bond.
Explanation:
Ionic bonding is a type of chemical bond that involves the electrostatic attraction between oppositely charged ions, and is the primary interaction occurring in ionic compounds.
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The theoretical yield of carbon dioxide can be calculated using the stoichiometric ratio in the balanced equation for the reaction. It is the amount of product that would be obtained if all reactants were completely converted to product under ideal conditions. The theoretical yield can be calculated by multiplying the amount of the starting reactant by the stoichiometric ratio in the balanced equation.
Theoretical yield is the amount of product that would be obtained from a chemical reaction if the reaction proceeded perfectly and all reactants were completely converted to product. In this case, the balanced equation shows that 1 mole of H3C6H5O7 reacts with 3 moles of NaHCO3 to produce 3 moles of CO2. Therefore, the theoretical yield of carbon dioxide would be 3 times the amount of H3C6H5O7 given.
Example: If 2 moles of H3C6H5O7 are given, the theoretical yield of CO2 would be 3 x 2 = 6 moles.
Note that the theoretical yield assumes ideal conditions and perfect conversion, so the actual yield may be less due to factors like incomplete reactions or side reactions.
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Answer:
4. 2.0 M CaC12(aq)
Explanation:
According to the van't Hoff factor, (the measurement of the solute's colligative properties effect (boiling point,freezing point depression)) a solution that has the highest point at standard pressure, id the one with the most particles or ions.
van't Hoff factor can also be described as the ratio between the original concentration of the solutions's atoms when the solution is dissolved and the concentration of the solutions taken from its mass.
Answer:
The possible options are :
(1) 1.0 M KC1(aq) (3) 2.0 M KCl(aq) (2) 1.0 M CaC12(aq) (4) 2.0 M CaC12(aq)
Answer is (4) 2.0 M CaC12(aq)
Explanation:
vant Hoff factor highest BP has the most particles...ions CaCl2 forms 3 ==> Ca2+ and 2Cl-.
The van 't Hoff factor i (named after Dutch chemist Jacobus Henricus van 't Hoff) is a measure of the effect of a solute upon colligative properties such as osmotic pressure, relative lowering in vapor pressure, boiling-point elevation and freezing-point depression.
Answer:
heterogeneous
Explanation: