Answer:
Number mole of calcium (Ca) = 1.4942 x 10⁻⁷ (Approx.)
Explanation:
Given:
Number of atom in (Ca) = 9 x 10¹⁶
Find:
Number mole of calcium (Ca)
Computation:
Number mole of calcium (Ca) = Number of atom in (Ca) / Avogadro's number
Number mole of calcium (Ca) = (9 x 10¹⁶) / (6.023 x 10²³)
Number mole of calcium (Ca) = 1.4942 x 10⁻⁷ (Approx.)
Africa, South America, Antarctica, Australia, and the subcontinent of India would be the answer…
The the strength of an electromagnet varies with the quantity and direction of current as well as the number of turns in the coil.
<h3>What as is an electromagnet?</h3>
An electromagnet is a material which operates by the principle of electromagnetism.
Electromagnets possesses both electrical and magnetic properties.
The strength of an electromagnet is affected by the current, the number of turns as well as the material of the electromagnet.
The strength of the given electromagnet will be affected thus:
- increases when using a battery with a higher voltage
- decreases when wrapping the wire around the nail only three times
- is unchanged when changing the direction of the current by reversing the battery connections
- decreases when using a plastic stick in place of the iron nail
- is greatest when holding the nail vertically rather than horizontally.
Therefore, the strength of an electromagnet is affected by current and number of turns in the coil.
Learn more about electromagnets at: brainly.com/question/12555869
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Answer:
eight strong bonds to the atoms that it touches and six weaker bonds to the atoms it almost touches. This makes it easier to understand why a metal might prefer the body-centered cubic structure to the hexagonal or cubic closest-packed structure.
Hey there!:
To find the original sample population density, divide the conted colonies by the dilution factor and the inoculate:
= 73 / (10⁻⁴ * 0.1)
= 73*10⁵
Thus, the original sample's population density was 7.3*10⁶ or 73* 10⁵.
Hope this helps!
