A sample of nitric acid contains both H3O ions and NO3 ions. This sample has a pHvalue of 1.
Write a name of the positive ion present in this sample.
Answers
Answer : The name of positive ion present in this sample is, hydronium ion.
Explanation :
For formation of a neutral ionic compound, the charges on cation and anion must be balanced.
The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.
Ion : An ion is formed when an atom looses or gains electron.
When an atom looses electrons, it will form a positive ion known as cation.
When an atom gains electrons, it will form a negative ion known as anion.
As per question, hydronium ion or hydrogen ion is having an oxidation state of +1 called as or
cation and nitrate ion
is an anion with oxidation state of -1.
Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral .
Hence, the name of positive ion present in this sample is, hydronium ion.
Related Questions
A gas in a rigid container at 25°C has a pressure of 0.96 atm. A change in temperature causes the pressure to increase to 1.25 atm. What is the new temperature of the gas?a...–44.2°C b....32.6°C c....115°C d...388°C
Which part of the atom can be transferred from one atom to another to formions?a. Protonsb. Neutronsc. Valence Electrond. Nucleus
HELPPPP I WILL GIVE YOU BRAIN THINGG WHATEVER ITS CALLED We have learned that there are five steps to reading a new piece of music. Can you name all five steps?
which element is the most electronegative out of the following K Mn Br WILL MARK BRAINLIEST!
covalent compound
element
atom
Answers
Final answer:
When a nonmetal bonds with another nonmetal, they typically form a covalent compound. This is because nonmetals have similar tendencies to attract electrons and, hence, they form a mutual sharing of electrons which constitutes a covalent bond.
Explanation:
When a nonmetal bonds with another nonmetal, they form a covalent compound. Covalent compounds are formed when two atoms share electrons, rather than transferring them as in ionic bonding. Nonmetals typically have similar electronegativities, meaning they both have similar tendencies to attract electrons. As a result, neither atom completely transfers its electron(s) to the other, they rather settle on a compromise and decide to share the electron(s). This sharing of electrons is the basis of a covalent bond. An example is the covalent bond of two oxygen atoms to form an O2 molecule.
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Answers
1) Assume 100 g sample
63.15% C * 100 g = 63.15g
5.30% H * 100 g = 5.30g
31.55% O * 100g = 31.55g
2) Convert mass to moles using their atomic weights
63.15 g * 1 mol C / 12.0107 g C = 5.2870 mol C
5.30 g * 1mol H / 1.0079 g H = 5.2585 mol H
31.55 g * 1mol O / 15.9994 O = 1.9719 mol O
3) Divide each quantity by the smallest number of moles
5.2870 mol C / 1.9719 mol = 2.6812 C = 2 C
5.2584 mol H / 1.9719 mol = 2.6667 H = 2 H
1.9719 mol O / 1.9719 mol = 1.000 O = 1 O
Empirical Formula is C₂H₂O
If the problem is silent, the molecular weight is equivalent to the empirical weight.
To get the molecular formula, divide the molecular weight by the empirical weight to get the multiple.
Molecular Weight is not mentioned thus it is equivalent to Empirical Weight which is:
Atom Number in Molecule Atomic Weight Total Mass
C 2 12.0107 24.0214
H 2 1.0079 2.0158
O 1 15.9994 15.9994
Total weight is 42.0366
Molecular weight / Empirical Weight = Multiple to be multiplied to the Empirical Formula
42.0366 / 42.0366 = 1
Molecular Formula isC₂H₂O
Answers
The best statement among the following which explains whether alchemy is a science or pseudoscience is "It is pseudoscience because each metal is known to be a unique element." Hence, Option (D) is correct.
What is Alchemy ?
Alchemy began to fully evolve into chemistry in the 17thcentury, with a greater emphasis on rational thought and experimentation and less emphasis on spirituality and mysticism.
The alchemists were never successful in changing lead into gold, but modernnuclear physics can accomplish this task.
Therefore , The best statement among the following which explains whether alchemy is a science or pseudoscience is "It is pseudoscience because each metal is known to be a unique element." Hence, Option (D) is correct.
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(2) Cu(s) + 2AgNO3(aq) ==>2Ag(s) + Cu(NO3)2(aq)
(3) 2H2(g) + O2(g) ==>2H2O(l)
(4) KOH(aq) + HCl(aq) ==>KCl(aq) + H2O(l)
Answers
Answer : The correct option is, (1)
Explanation :
The option (1) reaction is an example of decomposition reaction because in this reaction the larger compound, calcium carbonate decomposes into smaller molecule, calcium oxide and carbon dioxide.
Decomposition reaction : It is a type of reaction in which a larger compound decomposes into a smaller molecule or elements.
The option (2) reaction is an example of single displacement reaction because in this reaction the most reactive metal, copper displace the less reaction metal, silver.
The option (3) reaction is an example of combination reaction because in this reaction two reactants, hydrogen and oxygen react to give a single product as water.
The option (4) reaction is an example of double displacement reaction because in this reaction a positive cation and a negative anion of two reactants exchange their places to give two new products.
Hence, the correct option is, (1)
CaCO3(s) ==>CaO(s) + CO2(g)
hope this helps!.
Answers
U = mCp(Tf-Ti)
where:
U = heat absorbed or released in joules
m = mass in grams
Cp = specific heat in J/g-C
Tf = final temperature
Ti = initial temperature
Substituting values and converting 0.158 kg to grams gives the value 0.567 J/g-C. You can use a table of specific heat values to determine what the substance is as well.
Answer: 0.469 J / g°C
Explanation:
1) Data:
m = 0.158 kg
Q = 2,150.0 J
ΔT = 61.0°C - 32.0°C
Cs = ?
2) Formula:
Q = m×Cs×ΔT
3) Solution
i) Solve for Cs: Cs = Q / [m×ΔT]
ii) Plug in the data and compute
Cs = 2,150.0 J / [158 g × (61.0°C - 32.0°C) ] = 0.469 J / g°C
Answers
Final answer:
An appropriate hypothesis explaining the observation of distant galaxies moving away from each other, and that they do so more rapidly the further they are can be found in the Big Bang Theory. This theory suggests our universe began with a 'big bang' causing galaxies to move away from each other, a process which continues today.
Explanation:
Based on the observations mentioned, an appropriate hypothesis might involve the Big Bang Theory. This theory in physics and astronomy assumes that our universe started from a singularity - a very high-density and high-temperature state. The Big Bang Theory suggests that after the initial explosion, the galaxies began moving away from each other, a process which continues till today.
The farther a galaxy is from us, the faster it's receding, which is known as Hubble's Law. This observed phenomenon matches with the theory's premise, providing validating evidence for the Big Bang.
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