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3 years ago

How is diffusion used by cells? (Missed this lesson in school)

2 answers:

6 0

When cells need to gain or get rid of certain things, diffusion is a form of passive transport that does not require a cell to expand any energy.

lutik1710 [3]3 years ago

5 0

Diffusion, put simply, is a way for things to move in and out of the cell. The cell uses diffusion to take in oxygen and glucose and push out carbon dioxide.

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The amino acids are combinations of

aalyn [17]

Answer: The correct answer is: [B]:

_________________________________________________

" organic acid and amines " .

_________________________________________________

Note: Choice B: "organic acid and amines" ;

is the only answer choice that contains "amines" (hint:  amino acid / amine) ; which are "proteins" .

As such; Choice "B" is the only correct answer choice.

_____________________________________________________

Hope this helps!

Best wishes to you!

_____________________________________________________

5 0

3 years ago

Read 2 more answers

Answer the following questions based on the reaction below: NaOH(aq) + KHP(s) --> NaKP(aq)+H2O(I)

Natali [406]

Answer:

a) 1.44g

b) 77.3%

Explanation:

1. Chemical balanced equation (given)

$NaOH(aq)+ KHP(s)\rightarrow NaKP(aq)+H_2O(l)$

2. Mole ratio

$1molNaOH(aq):1molKHP(s)$

This is, 1 mol of NaOH will reacts with 1 mol of KHP.

3. Find the number of moles in 72.14 mL of the base

$Molarity=\text{number of moles of solute}/\text{volume of solution in liters}$

$\text{Volume of solution}=72.14mL=0.07214liters$

$\text{Number of moles of NaOH}=0.0978M\times 0.07214liter=0.007055mol$

4. Find the number of grams of KHP that reacted

The number of moles of KHP that reacted is equal to the number of moles of NaOH, 0.007055 mol

Convert moles to grams:

mass = number moles × molar mass = 0.007055mol × 204.23g/mol

mass = 1.4408 g.

You have to round to 3 significant figures: 1.44 g (because the molarity is given with 3 significant figures).

5. Find the percentage of KHP in the sample

The percentage is how much of the substance is in 100 parts of the sample.

The formula is:

% = (mass of substance / mass of sample) × 100

% = (1.4408g/ 1.864g) × 100 = 77.3%

7 0

3 years ago

A student is working on an assignment exploring the characteristics and uses of titanium. He notes in his assignment that it is

olga2289 [7]

Answer:

Acknowledge the source of relative weight of titanium.

Explanation:

Titanium is a chemical element which durable form of metal. Titanium is 45% lighter than steel. Titanium is made by combination of multiple elements. Titanium is very difficult to extract and this is the reason this element is considered expensive. The students examining the titanium must record the weight of titanium before exploring the characteristics and properties.

5 0

3 years ago

What is the condensation AND freezing point of water C AND F!!

vladimir2022 [97]

Answer:

Condensation 212F or 100C, Freezing 32F or 0C

Explanation:

Condensation 212 degrees Fahrenheit or 100 degrees Celsius.

Freezing point 32 degrees Fahrenheit or 0 degrees Celsius.

4 0

3 years ago

Pls help asap!! plssss

kvv77 [185]

AgNO₃+NaCl⇒AgCl+NaNO₃

<h3>Further explanation</h3>

Double-Replacement reactions. Happens if there is an ion exchange between two ion compounds in the reactant to form two new ion compounds in the product

Reaction

AB + CD⇒AD + CB

So for the option :

1. synthesis/combination reaction

2. decomposition reaction

3. double replacement reaction

4. single replacement reaction

4 0

3 years ago