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3 years ago

I NEED HELP, PLEASE AND THANK YOU! <3

Chemistry

2 answers:

Basile [38]3 years ago

8 0

Answer:allow for greater chances for a sentinel event

Explanation:

sergeinik [125]3 years ago

7 0

Answer:

The last one

Explanation:

To much eye contact may cause discomfort to the patient. I mean like looking at the client is good but with out a blink breaking is weird.

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An ideal gas in a cylindrical container of radius r and height h is kept at constant pressure p. The bottom of the container is

Juli2301 [7.4K]

Answer:

$m =\frac{p*(pi)*r^{2}*h*mw}{R*\frac{T_{1} + T_{O}}{2}}$

Explanation:

The gas ideal law is

PV= nRT (equation 1)

Where:

P = pressure

R = gas constant

T = temperature

n= moles of substance

V = volume

Working with equation 1 we can get

$n =\frac{PV}{RT}$

The number of moles is mass (m) / molecular weight (mw). Replacing this value in the equation we get.

$\frac{m}{mw} =\frac{PV}{RT}$ or

$m =\frac{P*V*mw}{R*T}$ (equation 2)

The cylindrical container has a constant pressure p

The volume is the volume of a cylinder this is

$V =(pi)*r^{2}*h$

Where:

r = radius

h = height

(pi) = number pi (3.1415)

This cylinder has a radius, r and height, h so the volume is $V =(pi)*r^{2}*h$

Since the temperatures has linear distribution, we can say that the temperature in the cylinder is the average between the temperature in the top and in the bottom of the cylinder. This is:

$T =\frac{T_{1} + T_{O}}{2}$

Replacing these values in the equation 2 we get:

$m =\frac{P*V*mw}{R*T}$ (equation 2)

$m =\frac{p*(pi)*r^{2}*h*mw}{R*\frac{T_{1} + T_{O}}{2}}$

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4 years ago

What is the percent composition by mass for hydrogen in water (H2O)?

saw5 [17]

Explanation:

Percentage composition = 2/18 = 11.11%.

5 0

3 years ago

Which element has the same number of energy levels as aluminum (Al) and the same number of valence electrons as calcium (Ca)

GREYUIT [131]

Answer:

magnesium (Mg)

Explanation:

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3 years ago

Read 2 more answers

What happens in a chemical change that does not occur in a physical change?

Andrej [43]

Answer:

In a chemical reaction, there is a change in the composition of the substances in question; in a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition. Although we call them physical "reactions," no reaction is actually occurring.

6 0

3 years ago

The taiga biome has long, cold, dry winters and cool, wet summers. This biome receives very little sunlight during the winter an

NikAS [45]

Answer:

Foxes, and pine trees

Explanation:

Foxes have lots of fur on them and can survive cold and harsh winters. Pine tress are also found in this biome. (note this may or maybe right or wrong)

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3 years ago