Which of the following best compares how magnetic fields are used in electromagnets and generators? Question 3 options: In an el
ectromagnet, a magnetic field is used to produce and electric current. In a generator an electric current is used to produce a magnetic field. In an electromagnet an electric current is used to produce a magnetic field, in a generator a magnetic field is used to produce an electric current. In an electromagnet and a generator, an electric current is used to produce a strong magnetic field.
1 answer:
Answer:
In an electromagnet an electric current is used to produce a magnetic field; in a generator a magnetic field is used to produce an electric current.
Explanation:
An electric current moving through a wire produces a magnetic field (electromagnet), and
Wires moving through a magnetic field generate an electric current (generator).
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The empirical formula for the given compound has been . Thus, option C is correct.
The empirical formula has been the whole unit ratio of the elements in the formula unit.
<h3>Computation for the Empirical formula</h3>The given mass of Sulfur has been, 50.05 g
The given mass of oxygen has been 49.95 g.
The moles of elements in the sample has been given by:
- Moles of Sulfur:
The moles of sulfur in the unit has been 1.56 mol.
- Moles of Oxygen:
The moles of oxygen in the unit has been 3.12 mol.
The empirical formula unit has been given as:
Thus, the empirical formula for the given compound has been . Thus, option C is correct.
Learn more about empirical formula, here:
Answer:
0.136g
Explanation:
A student dissolved 5.00 g of Co(NO3)2 in enough water to make 100. mL of stock solution. He took 4.00 mL of the stock solution and then diluted it with water to give 275. mL of a final solution. How many grams of NO3- ion are there in the final solution?
Initial mole of Co(NO3)2
Mole of Co(NO3)2 in final solution
Mole of NO3- in final solution = 2 x Mole of Co(NO3)2
Mass of NO3- in final solution is mole x Molar mass of NO3