Answer:
The addition of a strong acid like HCl to an aqueous solution would result in the decreasing of pH. Solution becomes more acidic.
Explanation:
HCl dissociates in water as this:
HCl → H⁺ + Cl⁻
Imagine and aqueous solution of NaCl where you have:
NaCl → Na⁺ + Cl⁻
2H₂O ⇄ H₃O⁺ + OH⁻
The addition of HCl would increase the [H₃O⁺]
2H₂O ⇄ H₃O⁺ ↑ + OH⁻
If the [H₃O⁺] is higher, the pH would be lower so the solution would be more acidic
Answer:
183.6kg
Explanation:
Given parameters:
Specific heat of the substance = 0.246J/g°C
Change in temperature = 15.5°C
Amount of energy released = 700J
Unknown:
Mass of the sample = ?
Solution:
To solve this problem we used the energy equation:
H = m c Δt
H is the energy released
m is the unknown mass
c is the specific heat
Δt is the change in temperature
Now insert the parameters and find m;
700 = m x 0.246 x 15.5
700 = 3.8m
m = 183.6kg
Mg3(PO4)2 - the molar mass would be 262g/mol, which is 100%
Atomic mass of Mg is 24, since we have 3Mg we multiply by 3 and get a mass of 72
262 : 100% = 72 : x%
x = 72*100 / 262
x = 27.5%
And do that for every element — get the molar mass of P and multiply by 2, use a ratio, and get the molar mass of O and multiply by 8 and use ratios :)
Answer:
10
Explanation:
Given endpoints:
E (-2,2) and F(4, -6)
To find the distance between two points;
Use the expression below;
D =
x₁ = -2,
x₂ = 4
y₁ = 2
y₂ = -6
Insert the parameters and solve;
D =
D = = 10
26 cm to m ____0.26 m____
4 hr to min ______240 min_____
3.25 km to m _____3250 m______
5 ft to in ______60 inches_____