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3 years ago

Wegener's claim was that the continents drifted from their original positions in Pangea

Chemistry

1 answer:

steposvetlana [31]3 years ago

7 0

Answer:

Imagine that you are a farmer in ancient Egypt. You must carefully plan around the flooding of the Nile in order to raise your crops.

Starting with planting (number 1), use the numbers 1 - 5 to place the following events in the correct order.

1 The floodwater recedes and you plant your crops.

The Nile begins to rise.

The Nile Valley is flooded again.

The hot season begins, and the Nile begins to dry up.

You harvest your crops

Explanation:

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I NEED HELP PLEASE,THANKS!

Yakvenalex [24]

Answer:

Covalent bonding

Explanation:

In covalent bonding, the electrons are shared to fill the octet rule (8 electrons in valence shell). CCl4 tends to do covalent bonding because the the 4 valence electrons are Carbon are shared with the Chlorine atoms so that each chlorine atom has a full octet and chlorine shares its electrons to fill the octet of carbon.

Also, since carbon and chlorine are both non-metal, non-metal things exhibit covalent bonding thus this is covalent bonding as well. Ionic boding is for metal and non metal pair where electrons are transferrred, in our case, electrons are shared, they are not transferred.

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3 years ago

in which part of the plant does photosynthesis take place A. the roots B. The leaves C. the flowers?

kondaur [170]

Answer:

Explanation:

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3 years ago

Read 2 more answers

Find the pH. What are the pH values for the following solutions? (a) 0.1 M HCl (b) 0.1 M NaOH (c) 0.05 M HCl (d) 0.05 M NaOH

slega [8]

Answer:

(a) $pH=1$

(b) $pH=1.3$

(d) $pH=12.7$

Explanation:

Hello,

In this case, we define the pH in terms of the concentration of hydronium ions as:

$pH=-log([H^+])$

Which is directly computed for the strong hydrochloric acid (consider a complete dissociation which means the concentration of hydronium equals the concentration of acid) in (a) and (c) as shown below:

(a)

$[H^+]=[HCl]=0.1M$

$pH=-log(0.1)=1$

(b)

$[H^+]=[HCl]=0.05M$

$pH=-log(0.05)=1.3$

Nevertheless, for the strong sodium hydroxide, we don't directly compute the pH but the pOH since the concentration of base equals the concentration hydroxyl in the solution:

$[OH^-]=[NaOH]$