3) electronegativity difference
Explanation:
The degree of polarity of a bond is indicated by the electronegativity difference between the atoms that forms the bond.
Electronegativity is the of atoms in a bond to attract the valence electrons in chemical bond more closely to themselves.
- An atom with a high electronegative value often pulls the electron to itself more.
- If the elecronegativity difference between the two species is between 0.4 and 1.7, they are polar covalent bonds.
- If is is greater than 1.7, they are ionic bonds.
- If less than 0.4, then a non-polar covalent bond must have formed.
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Any liquid with a pH above 8.2.
Phenolphthalein is naturally colorless but turns pink in alkaline solutions. The compound remains colorless throughout the range of acidic pH levels but begins to turn pink at a pH level of 8.2 and continues to a bright magenta at pH 10 and above.
Answer:
Which statement about living things is true?
All living things are made of cells, use energy, respond to stimuli, grow and reproduce, and maintain homeostasis
Explanation:
Answer:
21.6 g
Explanation:
The reaction that takes place is:
First we<u> convert the given masses of both reactants into moles</u>, using their <em>respective molar masses</em>:
- 9.6 g CH₄ ÷ 16 g/mol = 0.6 mol CH₄
- 64.9 g O₂ ÷ 32 g/mol = 2.03 mol O₂
0.6 moles of CH₄ would react completely with (2 * 0.6) 1.2 moles of O₂. As there are more O₂ moles than required, O₂ is the reactant in excess and CH₄ is the limiting reactant.
Now we <u>calculate how many moles of water are produced</u>, using the <em>number of moles of the limiting reactant</em>:
- 0.6 mol CH₄ *
= 1.2 mol H₂O
Finally we<u> convert 1.2 moles of water into grams</u>, using its <em>molar mass</em>:
- 1.2 mol * 18 g/mol = 21.6 g
