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3 years ago

The symbol Ag stands for which element?

Chemistry

2 answers:

Sergeeva-Olga [200]3 years ago

5 0

Answer:

Silver

Explanation:

I remember this because Ag can mean "Ain't Gold"

Ksivusya [100]3 years ago

5 0

<u>Answer:</u>

<em>The symbol Ag stands for Silver. </em>

<u>Explanation:</u>

It has got its symbol from its Latin word Argentum

Element is represented by symbol since about 118 elements are known to us.

Some elements takes its first letter as its symbol for example

Hydrogen H

Oxygen O

Nitrogen N

Phosphorus P

Sulfur S

Fluorine F

Some elements takes the first and the second letter as its symbol for example

Calcium Ca

Beryllium Be

Lithium Li

Argon Ar

Radium Ra

Bromine Br

Cobalt Co

Nickel Ni

Some element have the first letter and one of the letter from the name of the element for example

Chlorine Cl

Zinc Zn

Magnesium Mg

Manganese Mn

Astatine At

Chromium Cr

Some elements takes its symbol from its Latin word for example

Silver Ag The latin word is Argentum

Gold Au The Latin word is Aurum

Sodium Na The latin word is Natrium

Copper Cu The latin word is Cuprum

Iron Fe The latin word is Ferrum

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Calculate difference, ΔH-ΔE=Δ(PV) for the combustion reaction of 1 mole of heptane. (Assume standard state conditions and 298 K

Mamont248 [21]

Answer:

ΔPV = -9911 J

Explanation:

The combustion of 1 mole of heptane is:

C₇H₁₆(l) + 11O₂(g) → 7CO₂(g) + 8H₂O(l)

The change in number of moles of gas molecules is:

Δn = 7 moles products - 11 moles reactants = -<em>4 moles</em>

Using ideal gas ΔPV is:

ΔPV = ΔnRT

Where:

Δn is -4mol

R is 8,314472 J/molK

T is 298K

Replacing:

<em>ΔPV = -9911 J</em>

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I hope it helps!

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4 years ago

The table shows the properties of some organic compounds.

Shalnov [3]

Answer:

option C is correct

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3 0

3 years ago

A conjugate base is the species that

malfutka [58]

A conjugate base is the species that D. Remains after an acid has given up a single proton.

It is the deprotonated form of the acid.

8 0

3 years ago

Which of the following statements about elements in their compounds is false?

soldier1979 [14.2K]

Answer:

<h3>answer is A some second row elements may have 7 or fewer valance electron</h3>

Explanation:

<h3>because as we know second row elements are from Li up to Ne; their atomic number is from 3 - 10 and when we work their electron configuration only the inert gas neon have 8 valance electrons ; the others have 7,6,5,4,3,2,1 from F up to Li respectively so the statement is true </h3><h3>other alternatives like b it is not true because there is one element only having 8 valance electrons so it is not true</h3><h3>D and C are not true because outer most shell cannot occupey more than 8 electrons because of that those elements cannot have more than 8 valance electrons</h3>

<h3>I think it is help ful for you </h3>

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3 years ago

1. NH3 + NO → N, + H2O : How many grams of water will be produced if 15.0 grams of nitrogen trihydride

SCORPION-xisa [38]

Answer:

$\large \boxed{\text{11.9 g}}$

Explanation:

We will need a chemical equation with masses and molar masses, so, let's gather all the information in one place.

Mᵣ: 17.03 18.02

4NH₃ + 6NO ⟶ 5N₂ + 3H₂O

m/g: 15.0

(a) Moles of NH₃

$\text{Moles of NH}_{3} = \text{15.0 g NH}_{3}\times \dfrac{\text{1 mol NH}_{3}}{\text{17.03 g NH}_{3}}= \text{0.8808 mol NH}_{3}$

(b) Moles of H₂O

$\text{Moles of H$_{2}$O} = \text{0.8808 mol NH}_{3} \times \dfrac{\text{3 mol H$_{2}$O}}{\text{4 mol NH}_{3}} = \text{0.6606 mol H$_{2}$O}$

(c) Mass of H₂O

$\text{Mass of H$_{2}$O} =\text{0.6606 mol H$_{2}$O} \times \dfrac{\text{18.02 g H$_{2}$O}}{\text{1 mol H$_{2}$O}} = \textbf{11.9 g H$_{2}$O}\\\\\text{The reaction will produce $\large \boxed{\textbf{11.9 g}}$ of H$_{2}$O.}$

5 0

3 years ago