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2 years ago

13

What is the empirical formula for ribose (C5H10O5)?

1 answer:

Dafna1 [17]2 years ago

3 0

What is the empirical formula for ribose (C5H10O5)?

C. CH20

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This type of pollution will decay naturally

butalik [34]

Withdrawal is the answer to your question.

3 0

2 years ago

Suppose a solution is described as concentrated. Which of the following statements can be concluded? Select the correct answer b

Novosadov [1.4K]

Answer:

last option: none of<u> the above.</u>

Explanation:

Describing a solution as<em> concentrated</em> tells that the solution has a relative large concentration, but it is a qualitative description, not a quantitative one, so this does not tell really how concentrated the solution is. This is, the term concentrated is a kind of vague; it just lets you know that the solution is not very diluted, but, as said initially, that there is a relative large amount (concentration) of solute.

One conclusion, of course, is that <u>the solute is soluble</u>: else the solution were not concentrated.

On the other hand, the terms saturated and <em>supersaturated</em> to define a solution are specific.

A saturated solution has all the solute that certain amount of solvent can contain, at a given temperature. A <u>supersaturated solution has more solute dissolved than the saturated solution</u> at the same temperature; superstaturation is a very unstable condition.

From above, there is no way that you can conclude whether a solution is supersaturated or not from the statement that a solution is concentrated, so the answer is<u> none of the above</u>.

5 0

3 years ago

1 ) your favorite recipe for preparing 100 brownies requires the following : 6 eggs , 5 cups flour and 2 sticks of butter . how

erastova [34]

<em />If 100 brownies require 6 eggs, 5 cups of flour, and 2 sticks of butter. Then, 50 brownies should require half of those required to make 100 brownies. Use ratio and proportion to determine the number of eggs needed:

100/50 = 6/x
x = 3<span />

3 0

2 years ago

How many Neutrons are in the Nucleus of an atom that has an atomic mass of 36 andan atomic number of 25?

Wewaii [24]

Answer:

11 neutrons

Explanation:36-25=11

7 0

2 years ago

A sample originally contained 1.28 g of a radioisotope. It now contains 1.12 g of its daughter isotope.

dexar [7]

The answer is 3.

<span>The relation between number of half-lives (n) and decimal amount remaining (x) can be expressed as:

</span> $(1/2) ^{n} =x$

We need to calculate n, but we need x to do that. To calculate what p<span>ercentage of a radioactive species would be found as daughter material, we must calculate what amount remained:
1.28 -</span> 1.12 = 0.16

If 1.28 is 100%, how much percent is 0.16:
1.28 : 100% = 0.16 : x
x = 12.5%
Presented as decimal amount:
x = 0.125

Now, let's implement this in the equation:

<span> $(1/2) ^{n} =0.125$
</span>
Because of the exponent, we will log both sides of the equation:
$n * log(1/2) = log(0.125)$
$n = \frac{log(0.125)}{log(1/2)}$
<span> $n = \frac{log(0.125)}{log(0.5)}$
</span> $n= \frac{-0.903}{-0.301}$
$n = 3$

Therefore, 3 half-lives have passed <span> since the sample originally formed.</span>

4 0

3 years ago

Read 2 more answers