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
Nata [24]
3 years ago
9

Describe the evidence of changes in organisms in the Cambrian Era that are reflected in the fossil record.​

Chemistry
1 answer:
UkoKoshka [18]3 years ago
3 0

Answer:

Morphology and phylogenetics revealed by fossils. Perhaps the strongest evidence to support the Cambrian evolutionary explosion of animal forms is the first clear appearance, in the Early Cambrian, of skeletal fossils representing members of many marine bilaterian animal phyla

Explanation:

also pls vote brainliest <3 :)))

You might be interested in
What is the basic building block of matter to a chemist
Harman [31]
The basic building block of matter is the atom.
5 0
3 years ago
A ball is rolled along and off a table. Which of the following acts on the ball after it leaves the
alexira [117]
Both the force of the earth’s gravity on the ball and the force the ball got from being rolled off
6 0
3 years ago
Calcium carbide, CaC2, reacts with water to form calcium hydroxide and the flammable gas ethyne (acetylene) in the reaction: Wha
AysviL [449]

Answer:

1 mole of CaC₂ will produce 26g of C₂H₂ or 64.1g of CaC₂ will produce 26g of C₂H₂

Explanation:

Hello,

To solve this question, we'll require a balanced chemical equation of reaction between calcium carbide and water.

Equation of reaction

CaC₂ + 2H₂O → Ca(OH)₂ + C₂H₂

Molar mass of calcium carbide (CaC₂) = 64.1g/mol

Molar mass of water (H₂O) = 18g/mol

Molar mass of calcium hydroxide (Ca(OH)₂) = 74g/mol

Molar mass of ethyne (C₂H₂) = 26g/mol

From the equation of reaction, 1 mole of CaC₂ will produce 1 mole of C₂H₂

1 mole of CaC₂ = mass / molar mass

Mass = 1 × 64.1

Mass = 64.1g

1 mole of C₂H₂ = mass / molar mass

Mass = 1 × 26

Mass = 26g

Therefore, 1 mole of CaC₂ will produce 26g of C₂H₂

Note: this is a hypothetical calculation since we were not given the initial mass of CaC₂ that starts the reaction

7 0
3 years ago
Compounds have two or more atoms and the atoms can be the same element<br> true or false
mel-nik [20]

Answer:

i think its false because

Explanation:

compounds are made of two or more atoms of <u>different</u> elements

4 0
3 years ago
The nuclear binding energy of one nitrogen-14 atom is (BLANK) x 10A J. Round to 3
d1i1m1o1n [39]

mass defect = mass of constituents - mass of atom

N has 7p and 9n

proton mass ~ 1.00728 amu

neutron mass ~ 1.00866 amu

electron mass ~ 0.000549 amu

Nitrogen mass ~ 14.003074 amu

mass defect = (7*1.00728)-(7*1.00866)-(7*0.000549) - 14.003074

= 0.11235amu

convert to energy, the binding energy = 1.68x10^-11 J


5 0
3 years ago
Other questions:
  • What is the meaning of the word organism
    14·2 answers
  • Why phosphorus forms 3 bonds in molecule such as PH3 and PCl3-
    10·2 answers
  • Calcium chloride is used to melt ice and snow on roads and sidewalks and to remove water from organic liquids. Calculate the mol
    7·1 answer
  • Draw the alkane formed when 4,5,5-trimethyl-1-hexyne is treated with two equivalents of hbr.
    6·2 answers
  • How many moles of hydrogen, H2, are needed to react with 4.0 moles of nitrogen, N2
    13·1 answer
  • Is salt water solution a homogeneous mixture
    8·2 answers
  • How many moles are there in 80g of sodium<br> hydroxide?
    8·2 answers
  • Power is the rate at which energy is?
    15·1 answer
  • What block does sodium belong to? s-block p-block d-block or f-block
    9·2 answers
  • Calculate the molarity of 32.9 g32.9 g of MgS MgS in 971 mL 971 mL of solution.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!