Answer:
cylinder A has a higher density then cylinder B or more accurately the liquid in cylinder A is denser then the liquid in the second tube.
Explanation:
"Denser" simply means more matter is contained in the same space for example say you fill a tank with helium and another tank with water. Although they are the same size one will weigh much more because their is more particles or "stuff" inside the same area this can be because of a few things one it can be because the atoms or elements that compose the substance are heavier containing more electrons and protons in their orbit. or the molecular structure is more compact like a chicken wire fence has more wire in it then a barbed wire wire fence covering the same area because of the grid of wire in the middle.
Answer:
Q = -1.318 KJ
Explanation:
We will use the assumption that this solution acts like water and thus we will use the specific heat capacity of water and when converting from mL to g, we will use the conversion like we do for water.
We are told that 50 mL of HCl reacts with 100 mL of NaOH.
Thus total mass; m = 50 + 100 = 150 mL
Converting to grams gives 150 g since we have assumed that the solution behaves like water.
We are given;
Initial temperature; T_i = 21.3° C
Final temperature; T_f = 23.4° C
ΔT = 23.4 - 21.3
ΔT = 2.1°C
Formula for quantity of heat is;
Q = mcΔT
c is specific heat capacity.
We will use c = 4.184 J/g°C since the solution is assumed to behave like water.
Thus;
Q = -(150 × 2.1 × 4.184)
Q = -1317.96 J
Negative sign is used because temperature was raised and thus reaction is exothermic.
Approximation to KJ gives; -1.318 KJ
Answer:
NO3 that is the answer to the question
Answer:
Explanation:
Given parameters:
Number of breathe per minute = 15times
Volume of air per breath = 0.5L
Percentage of oxygen in air = 21%
Solution
There are 24 hours in a day.
60minutes makes a hour in a day,
I will breathe:
15 times x 60 x 24 = 21600 times in a day
The volume of air I will take in per day:
A breathe = 0.5L of air
21600breathe = 0.5 x 21600 = 10800L of air
Volume of oxygen I will breathe per day:
x 10800 = 2268L of oxygen
Molarity of the resulting solution will be 1.33 M.
<u>Explanation:</u>
First we have to find the number of moles for each of the solution using the formula, moles = molarity × volume
For cup 1 = 1 M ×0.05 L = 0.05 moles
For cup 2 = 2.5 M × 0.05 L= 0.125 moles
For cup 3 = 0.5 M × 0.05 L = 0.025 moles
Total moles = 0.05 + 0.125 + 0.025 = 0.2 moles
We have to find the total volume as, 0.05 + 0.05 + 0.05 = 0.15 L
Now we have to find the molarity as, moles / volume = 0.2 moles/ 0.15 L = 1.33 M
