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valentinak56 [21]
3 years ago
10

Krispy Kreme Doughnuts decide to donate $10,000 to a classroom for a party how many donuts did they donate in total

Chemistry
1 answer:
shusha [124]3 years ago
5 0
Find out how much the donuts cost then divide that by $10,000 and you will get your answer

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Examine the ph scale below. How does household bleach compare to household ammonia?
Kazeer [188]

Answer is: household ammonia has 10 times higher H⁺ concentration.

1) pH(household ammonia) = 11.5.

pH = -log[H⁺], approximately the negative of the base 10 logarithm of the molar concentration of hydrogen ions.

[H⁺] = 10∧(-pH).

[H⁺] = 10∧(-11.5).

[H⁺] = 3.16·10⁻¹² M; concentration of hydrogen ions.

2) pH(household bleach) = 12.5.

[H⁺] = 10∧(-12.5).

[H⁺] = 3.16·10⁻¹³ M.

3) 3.16·10⁻¹² M / 3.16·10⁻¹³ M = 10.

6 0
3 years ago
Read 2 more answers
The atomic number of lead is 82. Its mass number is 207?.how many protons neutrons and electros does the atom of lead contain
kupik [55]

Lead have:

82 electrons

82 protons

125 neutrons

Explanation:

The number of electrons and protons are given by the atomic number of the element.

Lead have 82 electrons and 82 protons.

The number of neutrons are given by the difference between the mass number and atomic number.

For lead number of neutrons = 207 - 82 = 125.

Learn more about:

particles in the atom

brainly.com/question/439508

#learnwithBrainly

4 0
3 years ago
s the purpose of the CaCl2 drying tube? What chemical reaction is it preventing (please supply a mechanism).
monitta

Answer:

See explanation

Explanation:

A drying tube prevents moisture from contaminating the reactants. The drying tube contains CaCl2 a hygroscopic material whose function is to absorb the moisture so that it does not react with the Grignard reagent. Without the desiccating action of CaCl2, moisture will enter the reaction chamber,contaminating the reactants.

If water reacts with the Grignard reagent, an alkane is formed. The mechanism of this reaction is shown in the image attached. R here represents the alkyl moiety of the Grignard reagent.

6 0
3 years ago
Which element has atoms with the greatest ability to bond to another in large, extended structures?
klemol [59]
The answer is D.)carbon
5 0
3 years ago
How many grams of C3H8 would be needed to produce 6.39 grams of CO2?
just olya [345]

Answer:

2.13g

Explanation:

Atomic mass of CO2 =  12 + 32 = 44g/Mol

Atomic mass of C3H8 = 36 + 8 = 44g/Mol

Reaction

C3H8 + 5O2 --> 3CO2 + 4H2O

3CO2 = 6.39g

Required C3H8 = (6.39/(44 x 3)) x 44 = 2.13g  

8 0
3 years ago
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