Since HCl is a strong acid, it readily dissociates, so we can assume that there are 1.0x10^-3 M of H+ ions. We can use the formula:
pH=-log[H+]
pH=-log(1.0x10^-3)
pH=3
We can find the pOH by subtracting 14-pH:
14-3=11
pOH=11
The [OH-] can be found by using the formula:
pOH=-log[OH-]
11=-log[OH-]
10^-11=[OH-]
[OH-]=1.0x10^-10
Answer:
1: energy
2: converts
Kinetic energy is either 3 or 4, those questions are really similar.
Explanation:
When the water droplets are placed in oily surface, oil being non-polar, thus there will not be adhesive force between water and oil.
Thus, surface tension is the factor which is responsible for shape of the water droplets to be spherical. The water molecules are pulled into the spherical shape by the action of the cohesive forces which is acting on the surface layer. As, the medium is totally different outside, the water molecules tend to get the minimum area and thus, forming spherical droplets.
Answer:
The answer to your question is 42.9 g of Ca
Explanation:
Data
mass of Ca = ?
mass of N₂ = 10 g
Balanced chemical reaction
3Ca + N₂ ⇒ Ca₃N₂
Process
1.- Calculate the molar mass of the reactants.
Ca = 3(40) = 120 g
N₂ = 2(14) = 28 g
2.- Calculate the mass of Calcium using proportions and the molar mass of the reactants.
120 g of Ca ---------------- 28 g of N₂
x ---------------- 10 g of N₂
x = (10 x 120) / 28
x = 1200 / 28
x = 42.9 g of Ca
Answer:
The terms used to describe the given process in <em><u>Chemical weathering.</u></em>
Explanation:
Weathering of rock is defined as breaking down of the rock into small pieces.
There are two types pf weathering :
Mechanical weathering : This weathering is due to change in physical parameters : temperature change, pressure change etc.
For example : When water soaked up in cracks or crevices of rocks freezes it expands and physically breaks the rock.
Chemical weathering : This weathering is decomposition of rocks due to action of chemicals.This type of weathering also changes chemical composition of rocks.
For example : when gases like carbon dioxide, sulfur oxide get dissolves in water present in rock to form weak acid which ease up the dissolving of rock in that weak acid.
