2 ways in which the carbon is stored for a long time

Answers

Answer 1

Answer: 1) Carbon can be stored as chemical energy in the cells of the plant or the animal. So, the carbon will stay stored as part of the organic material that makes up the plant or animal until it dies. When a plant or animal dies, it either decomposes and the carbon is released back into the environment; or the organic material of the organism is buried and transformed over millions of years into coal, oil, or natural gas.
2)Another way that carbon is stored for long periods of time is when carbon is used by ocean organisms. Many ocean creatures use calcium carbonate (CaCO3) to make their shells or to make the reef material where coral animals live. When algae die, their organic material becomes part of the ocean sediments, which may stay at the bottom of the ocean for many years. Over millions of years, those same ocean sediments can be forced down into the mantle when oceanic crust is consumed in deep ocean trenches. As the ocean sediments melt and form magma, carbon dioxide is eventually released when volcanoes erupt.

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What has to be true of a substance for it to dissolve in water?

Answers

The polarity of a water molecule comes from the uneven distribution of electron density of hydrogen and oxygen atom. The oxygen in the water molecule is more electronegative than the hydrogen. Water has a partial positive charge near the hydrogen atom and a partial negative charge near the oxygen atom. The result of this electrostatic attraction results in the bond called hydrogen bond. Also, because of this bond, it has the ability to dissolve most of the solutes due to its polarity and bonding.

Which mixture can be separated through filtration because one the substances is insoluble in water? Answers:

* NaChO and Pb(ClO)
* Na SO and SrSO
* NaNO and Pb(NO)
* NaC H O and Pb ( C H O )

Answers

B)Na2SO4 and SrSO4 is the answer

Prior to the Civil War, the North had 80 percent of the _____ capacity in the United States.A. agricultural
B. political
C. manufacturing
D. military

Answers

Answer:

C. manufacturing

Explanation:

With the Independence of the Thirteen Colonies in 1776, the colonies became independent states, but united in a Federation, with republican and presidential political representation. States in the northern region concentrated on the development of industry and, to that end, needed free and salaried labor to operate the work within the factories. Prior to the secession war, the northern states had 80 percent of manufacturing capacity in the United States. The formation of the working class and the industrial bourgeoisie in the North has also produced a specific way of looking at political activity and civil rights.

The North had 80% of the manufacturing capacity in the U.S. before the Civil War. The North was filled with factories, whereas the South relied on farming and slaves to survive, they produced a lot of cotton and tobacco for example. During the Civil War as you could imagine, the North was making a lot of artillery, so its economy began to expand more to meet the demands of war.

How many moles are present in a 24.5 gram sample of K2Cr2O7?

Answers

the answer to this is solved through stochiometry: the answer is this: 0.0833mol

Find the mass of AlCl3 that is produced when 10 g of Al2O3 reacts with 10 g of HCl according to the following equation Al2O3(s) + 6HCl(aq) --> 2AlCl3(aq) + 3H2O(aq) Please select the correct option: A. 16.2 g B. 20.0 g C. 10.0 g D. 6.10 g E. 12.2 g

Answers

Answer:

Considering the reaction stoichiometry and the definition of limiting reagent, the mass of AlCl₃ that is produced when 10.0 grams of Al₂O₃ react with 10.0 grams of HCl is 12.19 grams.

Explanation:

Al₂O₃ + 6 HCl → 2 AlCl₃ + 3 H₂O

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

Al₂O₃: 1 mole

HCl: 6 moles

AlCl₃: 2 moles

H₂O: 3 moles

The molar mass of the compounds present in the reaction is:

Al₂O₃: 102 g/mole

HCl: 36.45 g/mole

AlCl₃: 133.35 g/mole

H₂O: 18 g/mole

Then, by reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of mass of each compound participate in the reaction:

Al₂O₃: 1 mole× 102 g/mole= 102 grams

HCl: 6 moles× 36.45 g/mole= 218.7 grams

AlCl₃: 2 moles× 133.35 g/mole= 266.7 grams

H₂O: 3 moles× 18 g/mole= 54 grams

The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.

To determine the limiting reagent, it is possible to use a simple rule of three as follows: if by stoichiometry 102 grams of Al₂O₃ reacts with 218.7 grams of HCl, 10 grams of Al₂O₃ reacts with how much moles of HCl?

mass of HCl= 21.44 grams

But 21.44 grams of HCl are not available, 10 grams are available. Since you have less moles than you need to react with 10 grams of Al₂O₃ , HCl will be the limiting reagent.

Then, it is possible to determine the mass of AlCl₃ produced by another rule of three: if by stoichiometry 218.7 grams of HCl produce 266.7 grams of AlCl₃, if 10 grams of HCl react how much mass of AlCl₃ will be formed?

mass of AlCl₃= 12.19 grams

In summary, the mass of AlCl₃ that is produced when 10.0 grams of Al₂O₃ react with 10.0 grams of HCl is 12.19 grams.

What are ionic compounds typically composed of?a metal anion and a nonmetal cation

two metal anions

a metal cation and a nonmetal anion

two nonmetal cations

Answers

ionic compounds are held together by ionic bonds are formed by the transfer of electrons from a metal to a non metal

Ionic bond is formed by the electrostatic attraction between the oppositely charged ions.

metals give out electrons and becomes positively charged. positively charged ions are called cations. so these are called metal cations

the electrons given out are taken in by non metals and become negatively charged. negatively charged ions are called anions. then they are called non metal anions.

so ionic compounds are formed by the electrostatic attraction between metal cations and non metal anions.

therefore ionic compounds are composed of a metal cation and a nonmetal anion

Ionic compounds are typically composed of a metal cation and nonmetal anion.

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