1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Viefleur [7K]
3 years ago
6

How many millions of years ago did the earliest marine reptiles evolve from land reptiles?

Chemistry
2 answers:
Nezavi [6.7K]3 years ago
6 0
Roughly 240 million years ago
nydimaria [60]3 years ago
3 0
About 240 million years ago
You might be interested in
Explain why CaCl2 is likely to have properties similar to those of CaBr2
qaws [65]

Answer:

Because both CaCl2 and CaBr2 both contain elements (Chlorine and Bromine) from the same group (group 7)

Explanation:

Elements are placed into different groups in the periodic table. Elements in the same group are those that have the same number of valence electrons in their outermost shell and as a result will behave similar chemically i.e. will react with other elements in the same manner.

Chlorine and Bromine are two elements belonging to group 7 of the periodic table. They are called HALOGENS and they have seven valence electrons in their outermost shell. Hence, when they form a compound with Calcium, a group two element, these compounds (CaCl2 and CaBr2) will possess similar properties because they have elements that are from the same group (halogen group).

4 0
3 years ago
To explain the photoelectric effect, Albert Einstein linked the photoelectric effect to an idea from which scientist?
Georgia [21]
Max planck
hope i helped!
7 0
3 years ago
Read 2 more answers
A sample of calcium oxide (CaO) has a mass of 2.80 g. The molar mass of CaO is 56.08 g/mol. How many moles of CaO does this samp
Molodets [167]

Answer is "0.05 mol".

<em>Explanation;</em>

We can do calculation by using a simple formula as

n = m/M

Where, n is the number of moles of the substance (mol), m is the mass of the substance (g) and M is the molar mass of the substance (g/mol).

Here,

n = ?

m = 2.80 g

M = 56.08 g/mol

By substitution,

n = 2.80 g /56.08 g/mol

n = 0.0499 mol ≈ 0.05 mol

4 0
3 years ago
Read 2 more answers
What is the central conflict in "Ellen foster"?
photoshop1234 [79]

major conflict. Ellen continually suffers abuse by her neglectful caretakers and searches for a stable home and loving family. rising action. Ellen is placed in a number of temporary homes, all of which are unhappy, and she longs for a home where she is loved and cared for.


7 0
3 years ago
What organic product would be formed from the reaction of 1-bromo-2-methylpropane (isobutyl bromide), (ch3)2chch2br, with mg, et
miskamm [114]

The reaction of 1-bromo-2-methylpropane (isobutyl bromide), (CH_3)_2CHCH_2Br, with Mg, and Et_2O results in the formation of an adduct of formula (CH_3)_2CHCH_2MgBr known as grignard reagent, an organometallic reagent, which on reacting with H_3O^{+} results in the formation of isobutane.

The reaction is shown in the image.

4 0
3 years ago
Other questions:
  • H2 + Br2 → 2HBr If 2.23 g of hydrogen (H2) reacts completely, how many grams of hydrogen bromide (HBr) is formed? (mw Br=79.9) Q
    14·1 answer
  • At a constant pressure and amount of gas, how are temperature and volume related?
    13·1 answer
  • Which rays has the highest frequency?
    10·1 answer
  • A flask containing neon gas is connected to an open-endedmercury manometer. The open end is exposed to the atmosphere, wherethe
    11·1 answer
  • What are the components of black powder? What are the ratios of these components?
    9·1 answer
  • A student reacts 13 moles of iron with 21 moles of oxygen according to the following equation:
    10·1 answer
  • List in ascending order the different layers of atmosphere, their heights, and main their features. Help please!!! :•)
    8·1 answer
  • How many grams of carbon are in 300 g of glucose
    8·1 answer
  • Which one of the following is not matches the organelle with its function
    5·1 answer
  • How to recover ballpoint ink washed off from a paper?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!