All categories

3 years ago

How have organisms changed over time, according to the fossil record?

Chemistry

1 answer:

Yuri [45]3 years ago

6 0

Answer:

As the world changes, plants and animals change with it. Aside from a few living fossils, the species we see today are very different from species that lived in the past. Thus, the fossil record can be used to show that organisms changed to meet new conditions. This is the result of evolution of species over time.

hope this helps

have a good day :)

Explanation:

You might be interested in

I REALLY NEED HELP ON THIS! I DON’T CARE IF YOU USE THE INTERNET! I JUST NEED AN ANSWER! GRADE CARDS COME OUT TOMORROW!

bogdanovich [222]

Answer:

Wegener discovered that the Appalachian Mountains of the eastern United States, for instance, were geologically related to the Caledonian Mountains of Scotland. Pangaea existed about 240 million years ago. By about 200 million years ago, this supercontinent began breaking up

7 0

3 years ago

Read 2 more answers

Why are pure liquids and solids not included in the reaction quotient or the equilibrium constant expression for a given heterog

AfilCa [17]

Pure liquids and solids at the equilibrium stage:

Pure solids and pure liquids are not included in expressions for the equilibrium constant of heterogeneous equilibria since their concentrations are constant across time. Therefore, including it in our equilibrium expression is not significant.

Equilibrium expression:

When a certain chemical reaction is in equilibrium, the rates of the forward and backward reactions are equal, which means that there is no net change in the concentrations of the reactants and products and that the reaction mixture's composition does not change.

The concentration of solid and liquid:

Solid or liquid concentration,

= No. of Moles/ Volume in L

= Mass/(Volume × molar mass)

= Density/ Molar mass

Pure solids and liquids have constant densities and molar masses at a constant temperature.

Because of this, they have constant molar concentrations, which means that they are not considered in the equilibrium constant for a heterogeneous reaction.

Learn more about the pure solids, liquids, and heterogenous mixture here,

brainly.com/question/1811148

#SPJ4

3 0

2 years ago

Select the electron-domain geometry for a molecule with three bonding domains and one nonbonding domain.

mamaluj [8]

Answer: C) Tetrahedral

Explanation:

The number of electron pairs is 4 that means the hybridization will be $sp^3$ but as there are three bonding domains and one nonbonding domain, thus electronic geometry is tetrahedral and the molecular geometry will be trigonal pyramidal.

Linear electron geometry is possible when number of electron pairs is 2 and the hybridization will be $sp^2$ .

Trigonal planar geometry is possible when number of electron pairs is 3 and the hybridization will be $sp^3$ .

Trigonal bipyramidal geometry is possible when number of electron pairs is 5 and the hybridization will be $sp^3d$ .

Octahedral geometry is possible when number of electron pairs is 6 and the hybridization will be $sp^3d^2$ .

6 0

4 years ago

Fe2O3 + 2A1 - Al2O3 + 2Fe

stepan [7]

I’m assuming in this scenario that 2.5 mols of Fe2O3 is reacting with excess reactant. Based on the balanced equation, you can see that there’s a 1:2 ratio between Fe2O3 and Fe. This means that to find the mols of Fe formed, you need to multiply the mols of Fe2O3 by 2.
2.50mol Fe2O3 * 2mol Fe/1 mol of Fe2O3 = 5.00mols Fe.

4 0

3 years ago

Imagine dissolving a spoonful of sugar in a glass of water. Is the sugar-water combination classified as a compound or a mixture

Sonja [21]

Answer:mixture

Explanation:

It will only be a compound if it forms another element.

6 0

3 years ago

Read 2 more answers

How have organisms changed over time, according to the fossil record?​

How have organisms changed over time, according to the fossil record?