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Komok [63]
4 years ago
12

The pH of coffee is _______ times greater than the pH of pure water.

Biology
2 answers:
Talja [164]4 years ago
3 0

It would be 100 times greater if you are going from a pH of 5 to 7

Amiraneli [1.4K]4 years ago
3 0

Answer: Option (C) is the correct answer.

Explanation:

It is known that pH is a measure of acidity or alkalinity of a solution. When pH is less than 7 then the solution is acidic in nature and when the pH is more than 7 then the solution is basic in nature.

Pure water is neutral in nature and it has a pH of 7, that is, it is neither acidic nor basic in nature.

Whereas coffee is acidic in nature as it has pH of 4 to 5 which is very acidic as compared to pure water if we go from 5 to 7 on a pH scale.

So, we can conclude that the pH of coffee is 100 times greater than the pH of pure water.

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Four different types of cells are shown below. . Which characteristic is shared by all four cells? A. Membrane-bound organelles
NNADVOKAT [17]

Answer:

The answer is option c.

Genetic material composed of DNA

Hope this helps.

5 0
3 years ago
Read 2 more answers
Which is not a function of antibodies? neutralize antigen. agglutinate or precipitate antigen. activate complement enhance phago
siniylev [52]
All of above choices are functions of antibodies
8 0
3 years ago
Density is mass per unit of volume. Which pair of lab instruments would a student use to measure the density of seawater?
algol [13]

Answer:

A scale and a tape measure.

Explanation:

Use the tape measure to get the volume and the scale to get the mass.

8 0
3 years ago
Which of the following statements is a correct explanation for the observation that all offspring exhibit a phenotype for a part
bearhunter [10]

Answer:

D) Neither of the parental genes is dominate over the other.

Explanation:

<em>Since the trait on the offspring is a mixture from both parent, it means that neither of the alleles from both parents is completely dominant over the other. Instead, each of the alleles contributes equally to the trait of the offspring.</em>

This effectively explains the fact that each trait exhibited by offspring is a blend of the traits from the two parents.

The correct option is D.

8 0
4 years ago
(a) (1 pt) Assume diastolic blood pressure is normally distributed in a certain population, with a mean of 82 mmHg and a standar
Natali [406]

Answer:

2.275% of this population has a diastolic blood pressure less than 60 mmHg

Explanation:

Hello!

Yo have the distribution of the diastolic blood pressure in a certain population. Be X: diastolic blood pressure of an individual, X~N(μ;δ²)

Where

μ= 82mmHg

δ=11 mmHg

You need to calculate the probability of an individual of this population having less than 60mmHg diastolic blood pressure.

Symbolically:

P(X<60)

To obtain the value of probability you need to standardize the value of diastolic pressure so that you can obtain it from the standard normal distribution. The way to standardize the value is to subtract the mean and divide by the standard deviation

Z= (X-μ)/δ~N(0;1)

P(Z<(60-82)/11)

P(Z<-2)= 0.02275

I hope it helps!

3 0
3 years ago
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