3 years ago

In past scientist used stars and planets to determine time?

Chemistry

1 answer:

Lynna [10]3 years ago

5 0

Answer:

Explanation:

they used stars and planets to orientate

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Where does the chemical reaction take during photosynthesis

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in all green plants and most algae

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The molecular structure of water has an asymmetrical arrangement of hydrogen atoms causing.

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the asymmetrical arrangement of hydrogen atoms in a molecule of water causes the molecule to be polar, with the hydrogen atoms having a slightly positive charge, and the oxygen atom having a slightly negative charge.

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2 years ago

The following list contains some common polyatomic ions. Using the charge on these ions and the idea of valence, predict the for

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Answer: $Na_2CO_3$ or Sodium carbonate.

$KMnO_4$ or Potassium permanganate

Sodium ion carries 1 + charge whereas carbonate ion carries overall charge of -2. So for every carbonate ion, two sodium ions combine to balance the charges and thus form a stable compound, $Na_2CO_3$

Potassium ion carries 1 + charge where as permanganate ion carries overall charge of -1. So for every permanganate ion, one potassium ion combines to balance the charges and thus form a stable compound, $KMnO_4$

The predicted formulas are shown in the attached image.