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Question: Reaction of synthesis of ammonia at equilibrium: N2+3H2↔2NH3ΔH=−92.3kJ/mol. What factors disturb equilibrium of this reaction and cause a net reverse reaction (shift the reaction to the left)?

Question: The molar mass of NaOH is 40 g/mol. How many grams of NaOH should be added to water for the preparation of 0.5 L of a 500 mM solution?

Question: Which of the following statements about solutions is correct? Select one or more:

Question: Hydrogen bonds form when a (hydrogen) atom in one (POLAR) molecule is attracted to the (electronegative) atom of another molecule

Question: Which of the following reactions is considered as a unimolecular reaction?

Question: MATCH Classify each of these reactions:

Question: Which of the following statements about the rate of a chemical reaction is/are correct?

Question: Addition of 0.03 moles of HCl to 600 mL of phosphate buffer lowers the pH from 7.4 to 7.0. What is the buffering capacity for the acid?

Question: 15 g of sugar was added to 120 g of a 20% sugar solution. What is the percent concentration of the resulting solution?

Question: The addition of a catalyst to a reaction:

Question: What is the charge of the granule in the micelle? The structure of the micelle in the colloidal solution is presented below.

question with decres and incres

Question: The enzyme carbonic anhydrase catalyzes the rapid conversion of CO2+H2O↔ H2CO3. What effect does doubling the amount of carbonic anhydrase have on equilibrium?

Question: What would you add to the aqueous solution of hydrofluoric acid (HF\text{HF}HF) to form a buffer?

Question: Which of the following reactions can be considered as heterogeneous chemical reactions according to physical state?

Question: Which of the following statements are correct about oncotic pressure?

Question: Which of the following statements about jellification of high molecular mass compounds are correct?

Question: A buffer was made by combining 0.1 M of potassium benzoate and 0.1 M benzoic acid. After the addition of 0.05 M of HCl acid, the pH of the buffer will change to _____. (pKapK_apKa of benzoic acid is 4.19).

Question: Respiratory regulation of pH depends upon the:

Question: Reaction of synthesis of ammonia at equilibrium: N2+3H2↔2NH3,ΔH=−92.3kJ/mol(exothermic reaction). What factors disturb equilibrium of this reaction and cause a net forward reaction (shift the reaction to the right)?

Question: Which of the following properties are characteristic of colloid dispersion systems?

If 15 mL of 3.0 M HCl are diluted to a total volume of 100 mL, what is the new concentration?

Question: Addition of 0.05 moles of HCl to 0.5 L of ammonium buffer lowers the pH from 9.2 to 9.1. What is the buffering capacity of the acid?

Question: A student adds 6.00 g of a solid to the cone flask and adds water up to the 30.0 mL mark. The molar mass of the solid is 72.0 g/mol. What is the molarity (molar concentration) of the solution?

Which of the following factors will result in increasing velocity (rate) of a chemical reaction?

Normal blood plasma osmolarity is 0.3 Osm. What electrolyte should be used for infusions so that it is isotonic to the blood?

What will happen to a cell that is 70% water if it is in a solution of 30% water and 70% salt?

Question: The micelle of the colloidal solution is: [m(Mg(OH)2)nOH−(n−x)K+]x+xK+

What mass of solute is present in 250 mL of a 0.100 mol/L solution of NaOH? Assume that NaOH has a molar mass of 40 g/mol.

Sucrose dissolves well in water because:

A 10° C increase in temperature triples the rate of chemical reaction. How many times increases the rate of chemical reaction when temperature rises from 10° C to 40° C?

Correct Matches:

QUESTION Which of the following reactions can be considered as heterogeneous chemical reactions according to physical state?

Which of the following statements is correct regarding the solubility of gas in water? The options provided are:

Question: Which state of acid-base imbalance develops due to elevated CO₂ in the blood because of decreased respiration rate?