HELP ASAP Cells and the Structure of Life Lab Report

Instructions: Complete the Cells and the Structure of Life virtual lab. Record your observations in the lab report below. You will submit your completed report.

Objective(s):

In your own words, what was the purpose of the lab?

Procedure:

Investigate each of the three components of cell theory to investigate from the corkboard in the virtual lab:

All organisms are composed of cells.

Cells come from existing cells.

Cells are the basic unit of life.

For each section, record your observations below.

Complete your report and submit it for grading.

Data and Observations:

Investigation: All organisms are composed of cells.

What is the main function of each part of the compound microscope?

Observe each specimen under the microscope, and record a description about its appearance.

Investigation: Cells come from existing cells.

Observe the two flasks, and record information about their appearance.

Investigation: Cells are the basic unit of life.

Observe the two petri dishes, and record information about their appearance.

Conclusion:

Use your data to answer the following questions. Use complete sentences, and be as detailed as possible.

How did scientists discover that all living things are made of cells?

How did Pasteur’s experiment with the flasks help disprove the idea that living things could just appear or come from nonliving things like water and air?

Why are nutrients needed for living things? Describe the difference between living and nonliving things.

the answer is 1260

you spend 7 hours in school for 1 school day with 5 school days in 1 school week with 36 school weeks in a school year.

7*5*36= 1260 it's all about multiplying

it has both hydrogen and oxygen

answer : the correct answer is 2) hno₃ and naoh .

arrhenius concept of acid and base :

acid :

according to arrhenius acid are those which release h⁺ or hydronium ion (h₃o⁺) in aqueous solution .

example : hcl +h₂o ↔ h₃o⁺ + cl⁻

hcl is giving h₃o⁺ ion in water , hence it is an arrhenius acid .

base :

according to arrhenius , bases are those which releases oh⁻ ions in aqueous solution .

example : koh (aq) ↔ k⁺ + oh⁻

since koh is producing oh⁻ ions hence , it is an arrhenius base .

checking the options :

1) ch₃oh and naoh :

ch₃oh is known as methanol , an organic compound , which is neutral compound . the dissociation of ch₃oh is negligible . it is very very weak acid (ka = 3.2 * 10 ⁻¹² ) .

naoh being ionic gives na⁺ and oh⁻ ions in aqueous solution as :

naoh ↔ na⁺ + oh⁻ . hence it is an arrhenius base

it can be concluded that ch₃oh and naoh is not arrhenius acid and base.

2) hno₃ and naoh :

hno₃ is an ionic compound which gives ions h⁺ and no₃⁻ ion in aqueous solution as:

hno₃ + h₂o ↔ h₃o⁺ + no₃⁻

since it is giving h⁺ ion . hno₃ is arrhenius acid .

naoh being ionic gives na⁺ and oh⁻ ions in aqueous solution as :

naoh ↔ na⁺ + oh⁻

. hence it is an arrhenius base .

it can be said that hno₃ and naoh are arrhenius acid and base.

3) ch₃oh and hcl

as discussed ch₃oh is neutral compound .

while hcl in aqueous solution dissociates to give h⁺ and cl⁻ ions as :

hcl + h₂o→ h₃o⁺ + cl⁻ . so hcl is arrhenius acid .

hence , ch₃oh and hcl are not arrhenius acid and base.

4) hno₃ and hcl :

hno₃ as discussed gives h⁺ in aqueous solution , while hcl also gives h⁺ in aqueous solution .

hence both hno₃ and hcl are arrhenius acid they are not acid and base .

so the arrhenius acid and base are 2) hno₃ and naoh.