Answer:
<em>Solids</em><em> </em><em>do</em><em> </em><em>not</em><em> </em><em>undergo</em><em> </em><em>diffusion</em><em> </em><em>because</em><em> </em><em>it</em><em> </em><em>has</em><em> </em><em>a</em><em> </em><em>fixed</em><em> </em><em>structure</em><em> </em><em>(</em><em>vibrates</em><em> </em><em>in</em><em> </em><em>a</em><em> </em><em>fixed</em><em> </em><em>position</em><em>)</em><em> </em><em>and</em><em> </em><em>it</em><em> </em><em>also</em><em> </em><em>cannot</em><em> </em><em>be</em><em> </em><em>compressed</em><em>.</em><em> </em>
<em>Hoped</em><em> </em><em>this</em><em> </em><em>helped</em><em> </em><em>in</em><em> </em><em>any</em><em> </em><em>way</em><em> </em>
<em>Have</em><em> </em><em>a</em><em> </em><em>nice</em><em> </em><em>day</em><em> </em>
The answer is A, enzymes allow reactions to proceed at body temperature.
Assuming all other conditions equal, then, yes, the density would not change regardless of the mass of the substance. This is because the density is a ratio of the mass substance to its volume. If you increase the mass, the volume displaced would also be greater. So, it would just adjust making the density constant. This is applicable if it is at the same temperature and pressure conditions.
Answer:
Option C Removing Na₂CO₃
Option E Heating the container.
Explanation:
The equation for the reaction is given below:
2NaHCO₃ (s) <=> Na₂CO₃ (s) + CO₂ (g) + H₂O (g)
Enthalpy change (ΔH) = 136 KJ
To obtain more CO₂ do the following:
1. Add more NaHCO₃
From chemical equilibrium, adding more NaHCO₃ means the reactant has increase. Thus, it (the reactant) will react to form more product (CO₂)
2. Removing any of the products. Removing any of the products implies that more reactants are in the reaction vessel than the product. Thus, the reactants will react to produce more products (CO₂)
3. Heating the container. Heating the container will lead to an increase in the temperature of the reaction. Since the enthalpy change (ΔH) is positive it means the reaction is endothermic. Thus, heating the container i.e increasing the temperature will favours the forward reaction i.e more products will be obtained.
NOTE: Pressure has no effect in the reaction system since there is no gaseous reactants.
Considering the options given above, C and E gives the correct answer to the question.
Answer:
12.3 g.
Explanation:
Whenever a similar problem is involved, we need to write the chemical reaction representing the net change, as well as due to the fact that we need to know the stoichiometry involved.
Sodium chloride reacts with silver nitrate in a double displacement reaction to produce a cation exchange, that is, we produce silver chloride and sodium nitrate given by the following balanced chemical equation:
According to the balanced chemical equation, the molar stoichiometry of silver nitrate to sodium chloride is 1 : 1.
Let's find moles of each substance to determine the limiting reactant. To do this, divide mass of each component by its molar mass:
Since the stoichiometry of this reaction is 1 : 1, we can compare the moles directly. Notice that the number of moles of NaCl is lower than the number of moles of silver nitrate. This means NaCl is the limiting reactant.
According to the balanced chemical equation, 1 mole of NaCl produces 1 mole of AgCl, so the amount of AgCl would be:
In order to convert this into mass, let's multiply by the molar mass of AgCl:
