Answer:
<u>H2PO4- is a proton donor and HPO42_ is a proton acceptor</u>
Explanation:
Step 1: What are hydrogen ion donor and acceptor
in the following reaction we see that:
⇒ H2PO4- is more likely to give a H+ ion to form HPO42-.
⇒HPO42- is more likely to take a H+ ion, to form H2PO4-
The reaction of an acid in water solvent is described as a dissociation
:
HA ⇔ H+ + A-
⇒where HA is a proton acid
So, H2PO4- = HA and HPO42- = A-
Acids are proton donors. So, <u>H2PO4- is a proton donor and HPO42_ is a proton acceptor</u>
Answer:
Explanation:
For the reaction: 2X + 3Y = 3Z, the combination of 2.00 moles of X with 2.00
moles of Y produces 1.75 moles of Z
2 mol 2 mol 1.75 mol
2X + 3Y = 3Z
need 2 mol 3 mol to give 3 mol
3 mol Z/3 mol Y= 1 to 1
should get 2 mol Z
1.75/2 =87.5 % yield
The substance that can be broken down by chemical means from the choices given is <u>CO (Carbon monoxide).</u>
<u>Carbon monoxide</u> is a compound made up of carbon and oxygen and can therefore be broken by chemical means.
<h2>Further Explanation
</h2><h3> Pure substances </h3>
- Pure substances are substances that have a constant composition and also cannot broken down into simpler substances using physical means.
- Pure substances are classified as either elements or compounds.
<h3>Elements
</h3>
- Elements are a type of pure substances that are made up of one type of atom and cannot be broken down into simpler substances by both chemical and physical means.
- Atoms making up a certain element are similar or identical in properties. Examples of elements are, Oxygen, sodium, calcium, etc. Periodic table shows an arrangement of all known elements.
<h3>Compound </h3>
- A compound is a pure substance that is made up of than one type of atoms of different elements and can be broken down into individual elements making it using chemical means.
- Compounds cannot be broken down into simpler substances by physical means but only using chemical means. Compounds have constant composition and therefore they have a constant ratio of elements. For example the ratio of elements making up carbon dioxide is always 27% Carbon and 73% Oxygen.
- Examples of compounds include, water, Ammonia, calcium sulfate, carbon dioxide, etc.
- In our case, Carbon monoxide, (CO) is a compound made up of a carbon atom and an oxygen atom. Other choices, Ca, Ce, and Cu are all elements.
Keywords: Compound, elements, pure substances
<h3>Learn more about:
</h3>
Level: High school
Subject: Chemistry
Topic: Atoms, elements, compounds and mixtures
Answer:
Tb Hg = 656.726 K
Explanation:
normal boiling point (Tb):
Clasius-Clapeyron's law:
- Tb = [(RLn(Po)/ΔHv) + (1/To)]∧(-1)
∴ R = 8.314 J/K.mol
∴To = 25°C ≅ 298 K
∴ Po = 0.0017 torr = 2.24 E-6 atm
∴ ΔHv = 59.0 KJ/mol = 59000 J/mol
⇒ Tb = [(8.314 J/K.mol)Ln(2.24 E-6))/(59000 J/mol)) + (1/298 K)]∧(-1)
⇒ Tb = [- 1.833 E-3 K-1 + 3.355 E-3 K-1 ]∧(-1)
⇒ Tb = [1.523 E-3]∧(-1)
⇒ Tb = 656.726 K
Let's look at the molar weight of the answers:
NO is 30 g/mol
NO2 is 46
N2O is 44
N2O4 is 124
<span>We have the grams of the product, so we need the moles in order to calculate the molar weight. We us PV=nRT for this, assuming standard temperature and pressure. </span>
You were given the liters (.120L)
Std pressure is 1 atmosphere
You're looking for n, the number of moles
<span>Temp is 293.15 kelvin, thats standard </span>
And r is the gas constant in liters-atm per mol kelvin
(.120 liters)(1atm)=n(293.15K)(.08206)
Solving for n is .0049883835 mol
<span>.23g divided by .0049883 mol is about 46g/mol. You're answer is B I think, NO2
I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
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