Potassium is not brittle. It belongs to the group of Alkali metals which are malleable instead.
Potassium is magnetic.
The balanced chemical reaction would be
<span>fecl2 + 2naoh = fe(oh)2(s) + 2nacl
Initial amounts of the reactants are given, so, we need to determine which of the reactants is the limiting reactant and use this amount to determine what is asked. However, what is being asked is how many of the FeCl2 is used in the reaction, showing that it is NaOH that is the limiting reactants. Thus, we just use the initial amount of NaOH and relate the substances by the chemical reaction as follows:
6 mol NaOH ( 1 mol FeCl2 / 2 mol NaOH ) = 3 mol FeCl2
Therefore, 3 moles of FeCl2 is used up and 3 moles of FeCl2 is also left after the reaction.</span>
Answer:
Explanation:
Data provided:
Charge on the glass rod, Q = 0.680 μC = 0.680 × 10⁻⁶ C
Charge on the silk cloth, q = 0.590 μC = - 0.590 × 10⁻⁶ C
Distance between glass rod and the silk cloth, r = 11.0 cm = 0.11 m
now,
The force between (F) the charges is given as:
where,
k is the Coulomb's constant = 9 × 10⁹ N.m²/C²
on substituting the respective values, we get
or
D. apply downward force to the lily pad, pushing itself upwards.
The region around a magnet where the magnetic force is exerted is known as magnetic field<span>. Magnetic field is the area around a magnet, a magnetic object or an electric charge in which magnetic force is exerted. Magnetic fields are created by moving electric charge. Magnetic field is measured by its strength and by the direction it points. The strongest external magnetic fields are near the poles. A magnetic north pole will attract the south pole of another magnet, and repel a north pole. In a bar magnet the magnetic field lines can be traced out with the use of a compass.</span>
