The four types of sentences are declarative, exclamatory, imperative, and interrogative. Explanation: A declarative sentence is a sentence that creates a statement.

2016年1月10日 · The four macromolecules are nucleic acids, carbohydrates, proteins, and lipids. Structure: 1. Nucleic acids: Contain N in rings, nucleotides made of sugar, phosphate and nitrogenous base Carbohydrates: Made of C,H, and O; –OH's on all carbons except one Lipid: Made of C,H, and O; lots of C-H bonds; may have some C=C bonds (unsaturated) Protein: …

2016年4月9日 · 1:ionic bonding:It is done between metal and non metal.The metal loses and electron and gives it to the nonmetal.For example Na+ and Cl- so they make NaCl 2:Covalent Bonding:It is done between 2 non metals and they both share electrons for example H+ and OH- and they make H2O 3:Metallic Bonding:It is the strong attraction between closely packed …

2015年11月13日 · Proton (charge of +e, in the nucleus), Neutron (0 charge, in the nucleus), and Electron (charge of –e, outside the nucleus). 1. Proton. This is a positively charged particle that is present in the nucleus of atoms. It has a charge of + 1.6 × 10^(-19) C. But for ease we might say it has a charge of +e or +1. Neutron. This particle has a charge of zero; it is uncharged/neutral. It …

2014年10月22日 · With linear systems of equations, there are three possible outcomes in terms of number of solutions: One solution. Infinitely many solutions. No Solutions at all. If there is one solution, it means that there is a single intersection between the two lines that your equations give. For example, considering the following equations: y = 2x y = -x+9 If we graphed them …

The ratio between the surface area and volume of cells influences their structure and biology. Surface to volume ratio places a maximum limit on the size of a cell and can influence the environment in which an organism lives and gets nutrients.

2017年8月16日 · The balanced chemical equation for this reaction is ul(4"Al"(s) + 3"O"_2(g) rarr 2"Al"_2"O"_3(s) A reaction in which two or more reactants combine to form only one product is called a synthesis reaction.

A smoothie shop offers drinks with 5 types of whole fruit, 4 types of juice, and 3 flavors or yogurt. How many smoothie combinations are possible? Is selecting the batting order in a baseball game a permutation or combination?

2017年6月28日 · pH = 4 To calculate the pH of a solution, use the equation pH = -log[H_3O^+] Since we are given the hydronium ion (H_3O^+) concentration of the solution, we can plug this value into the formula. pH = -log[1.00 xx 10^-4 M] pH = 4 The pH of this solution is 4. Added notes: pH = pH_3O^+ because hydrogen ions attach to water molecules for form hydronium …

2014年8月22日 · Chemical equations need to be balanced in order to satisfy the law of conservation of matter, which states that in a closed system matter is neither created nor destroyed. Take for example the combustion of methane ("CH"_4"): "CH"_4" + "O"_2" rarr "CO"_2" + "H"_2"O" If you count the number of atoms (subscripts) of carbon, hydrogen, and …