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3 years ago

What are the 3 body systems that process the molecules from the food we eat and the air we breathe?

Chemistry

1 answer:

Ludmilka [50]3 years ago

4 0

Answer:

respiratory, digestive and circulatory system

Explanation:

the respiratory system brings oxygen into the lungs when you breathe. the digestive system breaks food down into nutrients such as glucose. the circulatory system transports glucose and other nutrients from the digestive system to the cells.

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Krypton is named after the Greek word that means “secret.” Which explains why krypton was most likely given this name?

irinina [24]

Answer:

<h2>Krypton is a halogen, so it should be kept secret because it is so reactive and toxic. Krypton is a noble gas, so it was difficult for chemists to find it, as though it was a secret.</h2>

Explanation:

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3 years ago

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What are the products formed when a base reacts with an acid?

brilliants [131]

It would become a salt

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4 years ago

Need help with question please .. -20 points

san4es73 [151]

Answer:

B oklolol

$[tex]\purple{\rule{45pt}{7pt}}\purple{\rule{45pt}{999999pt}}[tex]$

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3 years ago

Solution A is a 1.00 L buffer solution that is 1.188 M in acetic acid and 1.188 M in sodium acetate. Acetic acid has a pKa of 4.

Tomtit [17]

Answer:

pH change is -0.07

Explanation:

Using H-H equation for acetic acid:

pH = pKa + log [Acetate salt] / [Acetic acid]

Replacing:

pH = 4.74 + log[1.188M] / [1.188M]

pH = 4.74

The HCl reacts with sodium acetate producing acetic acid, thus:

HCl + CH₃COONa → CH₃COOH + NaCl

That means the final moles of sodium acetate are initial moles - moles of HCl and moles of acetic acid are initial moles + moles of HCl.

As the volume of the buffer is 1.0L, initial moles of both substances are 1.188moles. After reaction, the moles are:

sodium acetate: 1.188mol - 0.1mol = 1.088mol

Acetic acid: 1.188mol + 0.1mol = 1.288mol

Using again H-H equation:

pH = 4.74 + log[1.088M] / [1.288M]

pH = 4.67

pH change is: 4.67 - 4.74 = -0.07

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3 years ago

HELP ME PLZ!!!! An artist follows this formula for making a special tricolored bracelet: 8 orange beads + 3 red beads + 4 green

Flura [38]

Answer:

1 bracelet.

Explanation:

For one bracelet: 8 orange, 3 red, 4 green, 1 string.

The artist has: 15 orange, 86 red, 92 green, 17 string.

No matter how much of the red and green beads she has, if she only has 15 pieces of orange beads, that will only allow her to make 1 bracelet.

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3 years ago

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