b. The concentration of Cl⁻ ion will be 0.1M.
c. The concentration of undissociated H₂O molecules remains unchanged.
d. The pH of the beaker's contents will be neutral.
e. The pH of the beaker's contents falls.
Answer: Option (e) is the correct answer.
Explanation:
Since, the beaker contains NaOH solution whose pH is 13. As pH of NaOH is greater than 7 so, it means that this solution is basic in nature.
Whereas pH of HCl solution is equal to 1. As its pH is less that 7 so, it is acidic in nature.
Hence, when we add 10 ml of HCl into 100 mL of NaOH then there will be a slight decrease in pH of the solution because an acid is being added into the NaOH solution.
Thus, we can conclude that the statement pH of the beaker's contents falls, correctly describes the results of this mixing.
Answer please!!!!!
1. Producers are usually smaller in size than consumers.
2. Producers do not rely on other organisms for food.
3. There are always more consumers than producers in food chains.
Explanation:
Second answer is the correct one.
b. 3.0 mol
c. 6.5 mol
d. 156 mol
Mole measure the number of elementary entities of a given substance that are present in a given sample. 3 mole of Cr are in 156 g of the element. The correct option is option B.
The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.
Mathematically, mole and molar mass of chromium can be related as :
number of mole =given mass of chromium÷ molar mass of chromium
Mass of chromium=156 g
Molar mass of 1 mole of chromium= 51.9961 g/mol
Substituting the given values we get,
number of mole =156 g ÷ 51.9961 g/mol
number of mole= 3
Therefore, the correct option is option B. 3 mole of Cr are in 156 g of the element.
To know more about mole, here:
#SPJ2
You are given the number of grams of Chromium which is 156 grams. The molar mass of chromium is 52 grams per mole. Divide 156 grams to 52 grams per mole of Chromium and you will get 3 moles of Chromium. The answer is letter B.
being specific being flexible
being authoritative
Answer:
The correct answer is being authoritative.
Explanation:
Authoritative refers to permission to act without asking permission while being held responsible. While implementation refers to the conclusion of all the work in solving an issue and needs careful consideration to detail. There are three fundamental steps involved, that is, preparing and planning to implement the solution, implementing and observing the activity, and evaluating and studying the success of the action. Thus, in my opinion being authoritative would be a primary concern when implementing a solution.
boiling point
color
reactivity
________________________________________________________
If a substance cannot be separated physically or chemically, it is __________.
a compound
an element
a solution
a mixture
___________________________________________________________________
If a substance cannot be separated physically, it is __________.
Question 6 options:
a pure substance
heterogeneous
a mixture
an alloy
___________________________________________________________________
How would you classify tap water?
Question 8 options:
a pure substance
a homogeneous mixture
a compound
a heterogeneous mixture
___________________________________________________________________
When sugar and water are mixed they make a solution. Another way to say a solution would be to call it a __________________.
pure substance
homogeneous mixture
compound
heterogeneous mixture
reactivity
solution
mixture
homogeneous mixture
homogeneous mixture
i think the fourth one might be wrong sorry );
Which of the following would NOT be a physical property of matter?
reactivity
________________________________________________________
If a substance cannot be separated physically or chemically, it is __________.
an element
___________________________________________________________________
If a substance cannot be separated physically, it is __________.
an alloy
___________________________________________________________________
How would you classify tap water?
a compound
___________________________________________________________________
When sugar and water are mixed they make a solution. Another way to say a solution would be to call it a __________________.
compound