Answer: Option (c) is the correct answer.
Explanation:
When current passes through a wire then a magnetic field is formed. Therefore, when two wires carry current in the same direction then both the wires with have respective magnetic fields in the same direction and their total magnetic field will be large.
But when current between two wires flow in opposite direction then the magnetic field produced will also be in opposite direction. Therefore, both the magnetic fields cancel each other out. Thus, total magnetic field will be small.
As a result, wires which carry current in the opposite direction repel each other.
Answer:
The sun is yellowish in color
Explanation:
The Sun is the closest star to the Earth.
The Sun is more than a couple million miles from other stars.
The Sun is not a white dwarf, but will become one in the future.
The Sun IS a yellowish color so.....
Answer: m = 74.7 g Ca(OH)2
Explanation: To solve this problem we will use the formula for Molarity which is M = n /L, where n is the number of moles and L represents volume in liters. Derive for n to find moles then convert it to mass using the molar mass of the compound.
First convert mL to L
532.0 mL ( 1 L / 1000 mL ) = 0.532 L
n = M L
= 1.90 M ( 0.532 L )
= 1.01 moles Ca(OH)2
Convert moles to mass:
= 1.01 moles Ca(OH)2 x 74 g Ca(OH)2 / 1 mole Ca(OH)2
= 74.7 g Ca(OH)2
Answer:
Explanation:
We know we will need an equation with masses and molar masses, so let’s gather all the information in one place.
M_r: 261.34 233.39
Ba(NO₃)₂ + Na₂SO₄ ⟶ BaSO₄ + 2NaNO₃
m/g: 75.00
1. Moles of Ba(NO₃)₂
2. Moles of BaSO₄
The molar ratio is (1 mol BaSO₄/1 mol Ba(NO₃)₂
3. Mass of BaSO₄
Answer:
The result was that H₂SO₄ is a strong electrolyte, NH₃ is a weak electrolyte and sugar is a non-electrolyte.
Explanation:
The experiment will show that the H₂SO₄ solution will light the lightbulb brightly, the NH₃ solution will light it weakly and the sugar solution will not light it at all.
This happens because to light the lightbulb we need free charges moving in the solution. Therefore, the substance that produce more ions will be the best electrolyte.
H₂SO₄ → 2H⁺ + SO₄²⁻
NH₃ + H₂O → NH₄⁺ + OH⁻
Sugar will not generate ions