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Anettt [7]
4 years ago
8

What is the name for the muscular contractions that push food through the digestive system?

Chemistry
1 answer:
Nookie1986 [14]4 years ago
6 0
Peristalsis hope this helps
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What are two reasons that someone would want to become a scientist?<br> 1 point<br> Your answer
kari74 [83]
Two reason someone would want to become a scientist to make exciting discoveries and discovered new life on our planet. Also you could solve huge problems that somebody else couldn’t solved. This is why somebody would want to be a scientist.
5 0
3 years ago
A 500 mL hypertonic saline solution is labeled as consisting of 5.21 % w/w NaCl. Given that the density of salt water is 1.02 g/
kicyunya [14]

<u>Answer:</u> The molarity of saline solution is 0.909 M

<u>Explanation:</u>

We are given:

5.21 w/w % NaCl

This means that 5.21 grams of NaCl is present in 100 grams of solution

To calculate mass of a substance, we use the equation:

\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}

Density of solution = 1.02 g/mL

Mass of solution = 100 g

Putting values in above equation, we get:

1.02g/mL=\frac{100g}{\text{Volume of solution}}\\\\\text{Volume of solution}=\frac{100g}{1.02g/mL}=98.04mL

To calculate the moalrity of solution, we use the equation:

\text{Molarity of the solution}=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}

Given mass of NaCl = 5.21 g

Molar mass of NaCl = 58.44 g/mol

Volume of solution = 98.04 mL

Putting values in above equation, we get:

\text{Molarity of solution}=\frac{5.21\times 1000}{58.44g/mol\times 98.04}\\\\\text{Molarity of solution}=0.909M

Hence, the molarity of saline solution is 0.909 M

3 0
3 years ago
Why is a ylid a stable nucleophile? Select all that apply. Group of answer choices The proximity of the positively charged phosp
pogonyaev

Answer:

1)The proximity of the positively charged phosphorous and negatively charged carbon stabilizes the charges.

2) Inductive effects and resonance stabilize the negative charge

Explanation:

both atoms have full octets of electrons( I.e Carbon and say phosphorus). The result can be viewed as a structure in which two adjacent atoms are connected by both a covalent and an ionic bond; normally written X+–Y−. Ylides are thus 1,2-dipolar compounds, and a subclass of zwitterions

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3 years ago
Describe the properties of Cooper
Hoochie [10]
I'm gonna assume you mean copper
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3 years ago
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Is a mixture being separated into two elements a chemical change
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Depends on how you separate it

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