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3 years ago

The preferred way to remove moisture from a dust cap prior to putting it back in place is to:

1 answer:

5 0

The best thing to do is to rinse the dust cap with freshwater and dry it with a clean towel of air from the tank. Be sure to blow or towel dry the dust cap before putting it in place on the first stage.

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You measure the pH of your backyard soil and find it is 7. You measure the pH of your friend's backyard soil and find it is 4. H

olchik [2.2K]

Answer:

1000 times.

Explanation:

Hello,

In this case, since the pH is defined by:

$pH=-log([H^+])$

If we want to compute the concentration of hydrogen we must write:

$[H^+]=10^{-pH}$

Thus, for both the backyard soils we compute:

$[H^+]_{pH=7}=10^{-7}=1x10^{-7}M$

$[H^+]_{pH=4}=10^{-4}=1x10^{-4}M$

It means that:

$\frac{[H^+]_{pH=4}}{[H^+]_{pH=7}} =\frac{1x10^{-4}M}{1x10^{-7}M}\\ \\\frac{[H^+]_{pH=4}}{[H^+]_{pH=7}}=1000$

It means that the concentration of hydrogen at a pH of 4 is 1000 times greater than the concentration of hydrogen at a pH of 7.

Regards.

4 0

2 years ago

The layers of the Earth are described by their composition but not their mechanical properties. True or false

Svet_ta [14]

Answer:

False

Explanation:

The layers include mantle, crust, cores, lithosphere.

8 0

1 year ago

Which is the best example of an autobiographical memory?

rjkz [21]

Autobiographical memory refers to memory of specific events that had occurred during the course of one' lifetime. Autobiographical memory is divided into two major groups which are episodic and semantic memories. Episodic memory recollects time, location and people while semantic memory recollect general facts. An example of autobiographical memory is the memory of college graduation event.

3 0

2 years ago

Did the T. Rex have an amniotic egg?

il63 [147K]

I know that It has an amniotic egg so It is either B or C

6 0

2 years ago

Roan coat color in cattle develops through incomplete dominance of the gene for red color and its allele for white. what crossin

slava [35]

Roan is a combination of white hairs with red hairs. When we see cattle like this, they look pink because it resulted from a mix of white and red.

Red allele: A
White allele: a

A heterozygotic animal has this genotype: Aa
Like i said previously this is the mixture of colors so the animal would be pink.

A red coat color has this genotype: AA
A white coat color has this genotype: aa

To get all the herd to be roan-colored cattle the combination of parents should be: AA x aa. -> 100% roan
Another possible way to obtain would beroan-colored cattle: Aa x Aa or aa x Aa (in this case there would be less probabable to obtain road).

8 0

3 years ago