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Andreyy89
3 years ago
15

Which is the most accurate description of compounds?

Chemistry
2 answers:
Alex787 [66]3 years ago
8 0
The answer has to be D
V125BC [204]3 years ago
3 0

Answer: Option (d) is the correct answer.

Explanation:

A compound is defined as the substance in which only different atoms chemically combine together in a fixed ratio by mass.

For example, NaCl, HCl, AlCl_{3}, etc are all compounds.

Compounds are also pure substances like elements as they can be broken down into their constituent particles.

Whereas substances that are made up of only one type of atom are known as elements.

Thus, we can conclude that the most accurate description of compounds is that they are made up of atoms of 2 or more elements that are chemically combined.

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Please help ASAP I’ll make you u as brainlister please 100 points pelaseee
inessss [21]

Answer:

(C) im pretty sure is the answer

Explanation:

6 0
3 years ago
Read 2 more answers
Alum is a compound used in a variety of applications including cosmetics, water purification, and as a food additive. It can be
mylen [45]

yield = 52.23 %

Explanation:

We have the following chemical reaction:

2 Al (s) + 2 KOH (aq) + 4 H₂SO₄ (aq) + 10 H₂O → 2 KAl(SO₄)₂·12 (H₂O) (s) + 3 H₂ (g)

mass of aluminium = mass of bottle with aluminium pieces - bottle mass

mass of aluminium = 10.8955 - 9.8981 = 0.9974 g

mass of alum = mass of bottle with final product - bottle mass

mass of alum = 19.0414 - 9.8981 = 9.1433 g

number of moles = mass / molecular weight

number of moles of aluminium = 0.9974 / 27 = 0.03694 moles

number of moles of alum (practical) = 9.1433 / 474 = 0.01929 moles

To calculate the theoretical quantity of alum that should be obtained from 0.03694 moles of aluminium we devise the following reasoning:

if       2 moles of aluminium produce 2 moles of alum

then 0.03694 moles of aluminium produce X moles of alum

X = (0.03694 × 2) / 2 = 0.03694 moles of alum (theoretical)

yield = (practical quantity / theoretical quantity) × 100

yield = (0.01929 /  0.03694) × 100

yield = 52.23 %

Learn more about:

reaction yield

brainly.com/question/7786567

#learnwithBrainly

5 0
4 years ago
DO NOT ANSWER IF YOU DO NOT KNOW WHAT TO DO
Mice21 [21]

Answer:

im gunna save my answer so no one can take it:)

Explanation:

I tried my best

4 0
3 years ago
Read 2 more answers
4NH3 (g)+502(g)->6H20g)+4NOg) What is the enthalpy change for this reaction?
Feliz [49]
Enthalpy is energy of bonds broken - energy of bonds formed. Here, the NH3 and O2 are broken and H2O and NO are formed. So the energy to break the NH3 bonds is 3 times the amount of energy it takes to break a N-H single bond (because there are three of them in a NH3 molecule) and then multiplied by 4 because there are four particles.

So the energy of the bonds broken is 12x the energy to break a N-H single bond plus 5x the amount of energy to break an O—O double bond (you don’t multiply this by anything because in each O2 molecule there is only one bond).

The energy of the bonds formed is 6*2 = 12 Times the amount of energy for a O-H single bond plus 4 times the amount of energy required to break a N—O double bond.

Subtract energy of bonds broken - energy of bonds formed and this is the change in enthalpy.

To know what type of bond it is, draw the Lewis structure.
7 0
4 years ago
9. A tank truck carries 34 000 L of sulfuric acid. The density
creativ13 [48]

Answer:

<h2>62,560 kg</h2>

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question

volume = 34,000 L

density = 1.84 kg/L

We have

mass = 1.84 × 34,000 = 62,560

We have the final answer as

<h3>62,560 kg</h3>

Hope this helps you

7 0
2 years ago
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