The atomic number 15 is p (phosphorus)
Answer: c
No because it has less gravity and there is nothing that can run forever eventually the strings will wear out or the balls would stop
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Sodium is an earth-metal (group one), sliver and platinum are d-block metals.... Thus silicon is the metalloid and that is true because it looks like a metal being shiny blue-gray but it exhibit non-metal characteristics, except the fact that it can conduct electricity in a heated state.
Answer: 1.93 x 10^24 molecules
Explanation:
CH4 is the chemical formula for methane, the first member of the alkane family.
Based on Avogadro's law:
1 mole of any substance has 6.02 x 10^23 molecule
So, 1 mole of CH4 = 6.02 x 10^23 molecules
3.2 moles of CH4 = Z
To get the value of Z, cross multiply:
(Z x 1 mole) = (6.02 x 10^23 molecule x 3.2 moles)
Z•mole = 19.26 x 10^23 molecules•mole
Divide both sides by 1 mole
Z•mole / 1 mole = 19.26 x 10^23 molecules•mole/ 1mole
Z = 19.26 x 10^23 molecules
Place Z in standard form
Z = 1.93 x 10^24 molecules
Thus, 3.2 moles of ch4 has 1.93 x 10^24 molecules
Answer: 3.7 m − 6
Explanation: Simplify the expression.
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