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Arturiano [62]
2 years ago
5

your mother, who is a self-described chocolate addict, phones you. she has read in the newspaper a summary of a research study s

uggesting that the consumption of a moderate amount of bittersweet chocolate reduces the risk of heart disease in older women. you ask her who funded the research. She says doesn't know and asks you why it would matter.
Chemistry
1 answer:
son4ous [18]2 years ago
7 0

Answer:

This matters because you need to know if this site is crediable

Explanation:

You need to know this because you need to know who runs this site and if it was approved by anything crediable.

You might be interested in
In a chemical reaction, exactly 2 mol of substance A react to produce exactly 3 mol of substance B. 2 A ⟶ 3 B How many molecules
Harman [31]

Answer:

There will be produced 1.71 moles of B which contain 1.03×10²⁴ molecules

Explanation:

The example reaction is:

2A → 3B

2 moles of A produce 3 moles of B

If we have the mass of A, we convert it to moles and then, we make the rule of three: 29.2 g / 25.6g/mol = 1.14 moles

Therefore 2 moles of A produce 3 moles of B

1.14 moles of A will produce (1.14 . 3) / 2 = 1.71 moles of B are produced

Now we can determine, the number of molecules

1 mol has NA molecules (6.02×10²³)

1.71 moles have (1.71 . NA) = 1.03×10²⁴ molecules

4 0
3 years ago
How many neutrons does 3919K have?
Igoryamba
19 protons and 19 electrons but neutrons are vary
5 0
3 years ago
How many major Foods or food groups accounts for 90% of food allergens?​
kow [346]

Answer:

Eight foods are responsible for 90 percent of all reactions: peanut, tree nut, milk, egg, fish, shellfish, soy, and wheat.

hope it helped

6 0
3 years ago
What is the fourth largest element on the periodic table?
KatRina [158]
I think it's the Pentium up
 115 
<span>he's in the 15th column, 7th period </span><span />
4 0
3 years ago
Read 2 more answers
The three naturally occurring isotopes of potassium are 39K, 38.963707u; 40K, 39.963999u; and 41K.The percent natural abundances
sweet-ann [11.9K]

Answer:

The isotopic mass of 41K is 40.9574 amu

Explanation:

Step 1: Data given

The isotopes are:  

39K with an isotopic mass of 38.963707u and natural abundance of 93.2581%

40K with an isotopic mass of 39.963999u

41K wit natural abundance of 6.7302 %

Average atomic mass =39.098 amu  

Step 2: Calculate natural abundance of 40 K

100 % - 93.2581 % - 6.7302 %

100 % = 0.0117 %

Step 3: Calculate isotopic mass of 41K

39.098 = 38.963707 * 0.932581 + 39.963999 * 0.000117 + X * 0.067302

39.098 = 36.33681 + 0.0046758 +  X * 2.067302

X = 40.9574 amu

The isotopic mass of 41K is 40.9574 amu

8 0
3 years ago
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