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# Tutor profile: Joseph R.

Joseph R.
Special Science Teacher

## Questions

### Subject:Environmental Science

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Question:

What is a biome?

Joseph R.

Biome - A biome is a huge geographic region that is distinguished by the vegetation, soil type, climate, and living organisms that are found there. To better understand what biome is, it is best to give some examples. EXAMPLES: 1. Grassland biome - this biome, from the term itself "grassland", obviously it is composts mainly by large area of grasses. 2. Forest biome - this biome is being dominated by tree species. This means that this biome is made up of trees and other woody species of plants.

### Subject:Basic Chemistry

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Question:

What is the Total Ionic and Net Ionic Equation Sodium Carbonate and Calcium Chloride reacts?

Joseph R.

ANSWER: TOTAL IONIC EQUATION (TIE): Ca2+ + 2Cl- + 2Na+ + CO32- ----> CaCO3 + 2Na+ + 2Cl- NET IONIC EQUATION (NIE): Ca2+(aq) + CO32-(aq) -----> CaCO3 (s) STEP BY STEP PROCESS in getting the total ionic and net ionic equations: Step 1: Write the balanced molecular equation (let us make number 4 question as an example) Na2CO3 + CaCl2 ----> CaCO3 + 2NaCl We need to put 2 on the NaCl so that the reactant and the product side are equal. Step 2: Write the state for each substance (solid, insoluble, gas, aqueous) Na2CO3(aq) + CaCl2(aq) ----> CaCO3(s) + 2NaCl (aq) Step 3: Split soluble compounds into ions (the total ionic equation) Ca2+ + 2Cl- + 2Na+ + CO32- ----> CaCO3 + 2Na+ + 2Cl- Step 4: Cross out the spectator ions on both sides of complete ionic equation Since 2Cl- and 2Na+ are present in both sides of the reaction, hence, they are called spectator ions and should be removed. Step 5: Write the remaining substances as the net ionic equation Ca2+(aq) + CO32-(aq) -----> CaCO3 (s)

### Subject:Biology

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Question:

What is DNA?

Joseph R.

DNA is an acronym for DEOXYRIBONUCLEIC ACID. Acronyms are used to abbreviate or shortened a long word or phrase. Let's show it abbreviated: D stands for DEOXYRIBP N stands for NUCLEIC A stands for ACID WHAT IS DNA? DNA is an important biological molecule in all living organisms because it carries all of our genetic information. These information contains the instruction that makes us. The instructions on what is the size of our nose, the color of our eyes, color of our eyes and many more are embedded in this biological molecule WHAT IS THE STRUCTURE OF DNA? The structure of DNA consists of three important molecules. First is a Deoxyribose, second is a Phosphate group and lastly a nitrogenous base. Let us discuss these three components of DNA more thoroughly: Deoxyribose - This molecule is a 5-carbon sugar wherein it assists forming the sugar-phosphate which serve as a "BACKBONE" of the DNA molecule. NUCLEIC ACIDS - This unit of the DNA plays a big role in the synthesis of proteins. This molecule consists of smaller units called nucleotides

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