Answer:
<h2>2</h2>
Explanation:
The pH of a solution can be found by using the formula
From the question we have
We have the final answer as
<h3>2</h3>
Hope this helps you
Answer:
13
Explanation:
Let's consider the unbalanced equation for the combustion of propane.
C₃H₈ + O₂ ⇒ CO₂ + H₂O
We will begin balancing H atoms by multiplying H₂O by 4.
C₃H₈ + O₂ ⇒ CO₂ + 4 H₂O
Now, we balance C atoms by multiplying CO₂ by 3.
C₃H₈ + O₂ ⇒ 3 CO₂ + 4 H₂O
Finally, we get the balanced equation multiplying O₂ by 5.
C₃H₈ + 5 O₂ ⇒ 3 CO₂ + 4 H₂O
The sum of the coefficients is 1 + 5 + 3 + 4 = 13.
Answer : The resulting solution will have a pH of 7.
Explanation:
Whenever acid and base reacts with each other to form water molecule is called Neutralization reaction. This water molecules is formed from the hydronium ion () from acid and hydroxide ion() from base.
When the equal volumes of acid and base of equal strength are combined, the resulting pH of the solution becomes 7.
The pH 7 value means that the solution is neutral.
Answer:
Mass of liquid unknown liquid = 10.4 g
Explanation:
Volume of liquid = 15 mL
Mass of liquid + graduated cylinder = 55.2 g
Mass of graduated cylinder = 44.8 g
Mass of unknown liquid = ?
Solution:
Mass of unknown liquid is calculated by subtracting the graduated cylinder mass from combined mass of liquid and graduated cylinder.
Mass of liquid = (Mass of liquid + graduated cylinder) - (Mass of graduated cylinder )
Mass of liquid = 55.2 g - 44.8 g
Mass of liquid = 10.4 g
So the mass of unknown liquid is 10.4 g.
answer:
1) reaction is exothermic
2) some bonds are broken and some are formed (see explanation below)
Explanation:
When energy is written on the product side of a chemical reaction, means that the energy is appearing as consequence of the reaction, that is a released energy (heat) that heats the surroundings.
This kind of reaction where heat is released and, as a consequence, the temperature of the surroundings increase, is called exothermic.
In every chemical reaction some bonds are broken and others are formed.
Breaking bonds requires energy.
Forming bonds release energy.
The energy written on the chemical reaction is a net change of energy: the bonds broken on the reactant side used energy and bonds formed on the products side released energy.
When the energy released by the formation of the product is greater than the energy of the bonds broken on the reactant side, the chemical reaction is exothermic.