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
sammy [17]
3 years ago
9

What organisms appeared on Earth First?

Chemistry
1 answer:
dusya [7]3 years ago
5 0
It is B because horn coals are bigger and I read it in a book
You might be interested in
If the actual yielsd of a reaction is 50 g and the theoretical yield is 60 g. What is the percent yield.
balandron [24]
M₁=50 g
m₀=60 g

w=100m₁/m₀

w=100*50/60=83.3%
4 0
3 years ago
Equation of ethane to ethanoic acid
VMariaS [17]
Feb 16, 2012 ... How do you convert ethane to ethanoic acid? (with equation please). First you chlorinate it in presence of light. C2H6 + Cl2 ---hv -> C2H5Cl + ...

Preparation of ethanoic acid from ethane This free online course covers the preparation of ethanoic acid from ethane. The Contents tab displays all the lessons ...


he formation of the aldehyde is shown by the simplified equation: ... Note: The equation for the conversion of ethanol to ethanoic acid is worked out in detail ... Starting from ethanenitrile, you would therefore get a solution containing ethanoate ... Mar 3, 2012 ... As well as using a normal type of molecular formula to describe an organic .... In ethane the carbon atoms have the maximum number of hydrogen atoms bonded .... e.g. ethanoic acid and ethanol will produce ethyl ethanoate,.


8 0
2 years ago
1. A chemical bond between metals and nonmetals; valence electrons are transferred ____.
Law Incorporation [45]

Answer:

1. Ionic bonding

2. Covalent bonding

3. Metallic bonding

Explanation:

Ionic bonding also referred to as electrovalent bonding is a kind of chemical bonding that involves the transfer of electrons between the valence shells of two elements with a large electronegativity difference usually a metal and a nonmetal.

For example an ionic bonding scenario might play out between a group one metal and a group seven halogen. While group one metals have one electron hindering their stability, group seven halogens need that one electron that could make them achieve this stability. It is this that causes them to come together in a way where the electron is transferred completely from the valence shell of the group 1 atom and accepted into the valence shell of the group 7 halogen.

Covalent bonding involves the sharing of electrons between atoms of comparable electronegativities. The electro negativity difference is not large enough to permit the total movement of the electrons and hence the electrons are then controlled by the nuclei of the two atoms

Between two metals, what we have is called the metallic bonding

7 0
2 years ago
Given 20.0 g of (NH4)3 PO3 how many moles is this? How many formula units is it? How many hydrogen atoms are present?
Setler79 [48]

Answer:

no of moles = (mass) ÷ molar mass

you get the molar mass from the periodic table

n = 20.0g ÷ ( 149.09 g/mol )

= 0.134 mol

number of formula units = number of moles × (6.022×10^23)

= 8.07×10^22 units

number of hydrogen atoms in (NH4)3 PO3 = 12 × number of formula units

= 9.68×10^23 hydrogen atoms

8 0
3 years ago
Then, in the light independent photosynthetic reactions, that energy is used to convert co2 into ________.
Svetradugi [14.3K]
In photosynthesis, light energy is used to convert CO2 into carbohydrates. 
7 0
3 years ago
Other questions:
  • Please give me the reasons of the solution!
    8·1 answer
  • What's the word called part of an experiment that changes to observe an outcome?
    15·1 answer
  • What is the silicone recycle code
    12·2 answers
  • The time required for one-half of the atoms from a sample of a radioactive substance to decay is called its _____.
    11·2 answers
  • What is made up of biotic and abiotic features
    15·2 answers
  • Would an element with 7 valence electrons be more or less reactive than an element with 3 valence electrons?
    11·1 answer
  • What are electrolytes
    10·1 answer
  • PlEasE help ASAP <br> Snskskssmskssm
    7·1 answer
  • What is the bond order for a single covalent bond?​
    6·1 answer
  • Given the atomic mass of select elements, calculate the molar mass of each salt.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!