Chemistry, 14.12.2021 18:50 lilblackbird4
Under what conditions the interaction - chlorine + hydrogen = hydrogen chloride takes place with an explosion:
A: when stirring;
B: in the cold;
C: at maximum contact and in the dark;
D: at maximum contact and direct sunlight?
Task 2: In separate cups are placed a teaspoon of the substances salt, sugar, flour and baking soda. They are covered with vinegar. Which of the substances will interact with the vinegar at room temperature?
?
3: Under what conditions hydrogen and oxygen are obtained from water;
A: at room temperature
B: when cooling
C: in the dark
D: when an electric current flows?
4: Which of the following changes is not a sign of a chemical reaction:
A: Heat release
B: Stirring;
C: Light releasing
D: Dissolving sludge?
Answers: 1
Chemistry, 21.06.2019 21:30
Calculate the h3o+ concentration in a solution of acetic acid if the concentration of molecular acetic acid present at equilibrium is 9.97x10^-3 m and k for the dissociation is 1.86x10^-5. ch3cooh(aq)+h2o(> h3o^+(aq)+ch3coo^-(aq)
Answers: 2
Chemistry, 22.06.2019 02:00
What is the volume occupied by 10.0 dm3 of gas at standard pressure after it has been compressedat constant temputure to 500.0 kpa?
Answers: 1
Chemistry, 22.06.2019 07:00
Indicate whether the specified alkyl halides will form primarily substitution products, only elimination products, both substitution and elimination products, or no products when they react with sodium methoxide. 1-bromobutane 1-bromo-2-methylpropane 2-bromobutane 2-bromo-2-methylpropane
Answers: 2
Chemistry, 22.06.2019 07:00
Achemist wants to extract copper metal from copper chloride solution. the chemist places 0.50 grams of aluminum foil in a solution containing 0.75 grams of copper (ii) chloride. a single replacement reaction takes place. (ii) chloride. a single replacement reaction takes place. which statement explains the maximum amount of copper that the chemist can extract using this reaction? a) approximately 0.36 grams, because copper (ii) chloride acts as a limiting reactant b) approximately 1.8 grams, because copper (ii) chloride acts as a limiting reactant c) approximately 0.36 grams, because aluminum acts as a limiting reactant d) approximately 1.8 grams, because aluminum acts as a limiting reactant
Answers: 3
Under what conditions the interaction - chlorine + hydrogen = hydrogen chloride takes place with an...
Computers and Technology, 15.12.2020 17:30
Chemistry, 15.12.2020 17:30
Mathematics, 15.12.2020 17:30
Mathematics, 15.12.2020 17:30
Mathematics, 15.12.2020 17:30
Social Studies, 15.12.2020 17:30
Mathematics, 15.12.2020 17:30
Mathematics, 15.12.2020 17:30
Mathematics, 15.12.2020 17:30
English, 15.12.2020 17:30