BIOLOGY HIGH SCHOOL

What is the pH range of highly acidic substances?

Answers

Answer 1
Answer: pH stands forthe power of hydrogen. pH that ranges form 1-6.9 are acid substances. At pH 1 -2.9, the substance is highly acidic. At pH 3 - 4, the substance is mildly acidic.At pH 4.1 – 6.9, the substance is weakly acidic. At pH 7, it is neutral. At pH7.1-14, it is basic. At pH 7.1 - 10.9, the substance is weakly basic. At pH 11- 13, the substance is mildly basic. At pH 13.1 – 14, the substance is highlybasic.
Answer 2
Answer: The pH is acids are 1-7, while 7 is neutral. 

The highly acidic substances are ranging between 1 and 3, while 1 is the MOST acidic. 

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can you predict the properties of a compound by knowing the properties of the elements that make up the compound?

Answers

No, you cannot determine the properties of a chemical compound by solely knowing the properties of the elements that make up the compound, because in a chemical compound, the properties are completely different and or independent of the chemical and or physical properties of the individual elements used to make up the compound.

Final answer:

The properties of a compound can often be predicted from the properties of its constituent elements, however, they're not always the same due to changes that occur during chemical reactions.

Explanation:

Yes, you can often predict the properties of a compound by knowing the properties of the elements that make it up. This is a fundamental concept in chemistry. For instance, sodium is a very reactive metal and chlorine is a poisonous gas, but when they combine to form sodium chloride, the resulting compound is ordinary table salt, which is safe to consume. However, it's important to note that while the properties of a compound are related to the properties of its constituent elements, they are not always the same. This is due to the changes that occur during the chemical reaction process, in which bonds are formed or broken and electrons are shared, gained, or lost.

Learn more about Properties of Compounds here:

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A fluid secreted into the small intestine during digestion that contains cholesterol, emulsification agents, and phospholipids is ________.A. bile
B. pancreatic juice
C. intestinal juice
D. gastric juice

Answers

Bile is created by the liver and stored in the gallbladder-- it emulsifies the fatty agents. 

The voyge of the beagle circled the globe. This voyage lasted? A.5months B.2 years C.4years D.5years

Answers

The voyage of the HMS Beagle is led by the scientitstCharles Darwin in search for species around the globe and  a curious observation that led him totheorize about evolution. It leaves form Plymouth Harbor, toured around theMadeira and Canary islands and made a landfall at the Cape of Verde islands. Theexpedition was originally planned to end in two years. It got delayed andturned into five years due to Darwin spending most of his time exploring onland. the answer is D.

describe the results if you do an experiment to determine the physical properties of tyrosinase. if you run gel filtration and SDS-PAGE, what results do you see

Answers

Gel filtration and SDS-PAGE could be used for determining a molecular weight of proteins, such as tyrosinase. In both methods, molecules are separated based on their size. Gel filtration measures the molecular weight of native proteins and SDS-PAGE measures the molecular weight of denaturated proteins. 

An embryo develops in the
uterus. < my answer
cervix.
ovary.
vagina.

Answers

Answer: The correct answer is -

uterus.

Explanation:

The development of embryo ( that is stage from second to eighth week after fertilization) takes place in the womb of mother, which is referred as Uterus.

After fertilization of egg, the zygote (fertilized egg) undergo divisions and forms a ball of cells called blastocyst, which eventually implants in the uterine wall (approximately one week after fertilization) and remains there for complete development till birth.

Thus, uterus is the right answer.

Answer:

A-uterus

Explanation:

got it right on my test

Courtney is making regular observations of the growth rate of kudzu vines on a ditch in her neighborhood. She isolated and tagged five tendrils of the vine, and takes weekly cumulative measurements for a year. A portion of her results are shown below. What issue with her data does Courtney need to resolve? Tendril #


Week 1 Week 3 Week 6


1 1.2 cm 5.9 in 1.2 ft


2 2.0 cm 4.8 in 0.98 ft


3 0.8 cm 3.2 in 0.55 ft


4 0.2 cm 1.6 in 0.35 ft


5 1.5 cm 4.3 in 1.01 ft


A) Inconsistent units of measure

B) Insufficient amount of data

C) Duration of the study

D) Number of samples

Answers

Answer: A. Inconsistent units of measure

Explanation:

When taking data such as measurements, it is very important that the results are reported in the same unit of measure. Failure to do so will eventually affect your analysed result.

Answer:

A) Inconsistent units of measure

Explanation:

Since Courtney measured the same variable in all the tagged tendrils, the unit of measurement is supposed to be the same. Before any further processing or analysis of the data, she will need to use the appropriate conversion factors to convert all the variates to the same unit.

The research lasted for a whole year and data were collected weekly, the issue of insufficient data or duration of study does not arise in this case. Also since, the size of study population was not indicated, it will be be difficult to point out the sample size as an issue.

The correct option is A.
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In an experiment to test the hypothesis that added phosphate will cause marigolds to produce more blooms, the experimenter has two groups of pots planted with marigold seeds. One group gets watered with phosphate added to the water, while the other group gets watered with no phosphate. Both groups get the same amount of water and light.Which is a controlled variable in this experiment? A. number of pots B. amount of water C. amount of phosphate D. amount of blooms on a plant