Answer:A
Explanation
:
when a 2.71 mL sample of a 0.493 M aqueous nitrous acid solution is tutorage with a 0.308 M aqueous sodium hydroxide solution, what is the ph after 65.1 mL of sodium hydroxide have been added?
Answer:
0.10 M NaHA
Explanation:
I want a pharmacist technician to help me with a question please
I'm a pharmacy dispenser which is the same thing. what's your question?
A baker was baking a cake which has burnt due to over heating. What kind of change is this ?
reversible
irreversible
burnt
heating
Give reason. When the tip of a plant is cut, it does not grow tall.
Answer: The growth of the plant decides on the presence of plant hormone, auxin which develops in the roots and shoots. Auxins change the rate of elongation in plant cells, controlling how long they become. So, if the tips are removed, there is no auxin made and growth of the plant stops.
How many decigrams of chromium are in 3.19 x 10^23 atoms of chromium? show work
mol = 3.19 × 10^23/6.02^23
= 0.529 mol
mass = 0.529 × 52
= 27.508 g
g to decigram
= 27.508 × 10
= 275.08 decigram
what is the name of the compound ZnO
Calculate the mass of diphosphorus pentoxide (P,05) that contains a trillion (1.000 x 10^2) phosphorus atoms. Be sure your answer has a unit symbol if necessary, and round it to 4 significant digits.
Answer: The answer is 94.25 × 10¯¹² g.
The frequency light of 3.52*10-7
Answer:
The speed of light, c, equals the wavelength, λ (pronounced lambda), times the frequency, ν, (pronounced noo).
c=λν
c is a constant. It is usually given as 3.00×108 m/s or 3.00×1010 cm/s rounded to three significant figures.❤
1 point
Convert 3.79 x 10^24 atoms of sodium to grams.
Answer:
is easy to poiling
Explanation:
also is dificult to melting
11) What volume will 0.75 mol of Oxygen gas (O2) occupy at 298 K and a pressure of 52.7 kPa?
Answer:
Volume = 35.3L
Explanation:
Use Ideal Gas Law (PV=nRT) and isolate for V (volume) by dividing both sides by P (pressure). You will then get the eqaution listed below and you can solve by using the method I used below.
V = nRT/P
V = (0.75kPa)(8.314)(298K)/(52.7kPa)
V = 1858.179/52.7
V = 35.3L
Which element represents magnetic properties?
Answer:Demagnetizing a magnet is also possible. Only a few substances are ferromagnetic; the most common ones are iron, cobalt and nickel and their alloys. The rare-earth metals neodymium and samarium are less common examples.
Explanation;
If the heat is added to an endothermic system, at equilibrium, the system will move to the _________ to regain equilibrium.
Answer:
At equilibrium, the system will move to the right to regain equilibrium
Elements with ________ atomic mass are best possible candidates for a fusion reaction. very low moderate to heavy moderate very heavy
very low
Explanation:
Nuclear fusion is a nuclear reaction wherein small nuclei are combined to form heavier nuclei. This process constantly occurs in the sun, which is mainly composed of hydrogen and helium atoms.
list 2 sources of waste water
Answer:
residential and domestic sources.
Explanation:
Please help! Urgent: take ur time and answer it correctly
Answer:
an electric field is a field around a charged particle or object within which a force ( electric force) would be exerted on other charged particles or objects.
Explanation:
particles with unlike charges attract one another while particles with like charges repel each other.
Which best defines color? (1 point)
a physical property of matter related to how a material interacts with different wavelengths
of light
a chemical property of matter related to how a material interacts with different wavelengths
of light
O a physical property of matter related to a material's ability to reflect light
O a chemical property of matter related to a material's ability to reflect light
Answer:
i believe the answer to your quetion will be A im on edge by the way so if your on a differnt program than it might be wrong sorry if im wrong have a wonderfull day!
This is due tomorrow please help!
Answer:
Normal Fault -> Tension
Reverse Fault -> Compression
Strike-Slip Fault -> Shearing
Explanation:
Normal Fault -> Tension
[] A normal fault is when the walls are being pulled apart and is caused by tension
[] Example:
<- ->
Reverse Fault -> Compression
[] A reverse fault is when the walls are being pushed together and is caused by compression
[] Example:
-> <-
Strike-Slip Fault -> Shearing
[] A strike-slip fault is when the walls are being pushed apart in parallel directions and is caused by shearing
[] Example:
/\ \/
Note: The page you provided also gives the answers for this specific question.
Have a nice day!
I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)
- Heather
need help with question please ..
-20 points
Answer:
B oklolol
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The stationary state with the lowest energy is called the _______.
Answer:
Ground state
the state with the smallest amount of energy.
What is the formula unit for an ionic compound?
Answer:
empirical formula
What types of orbitals are found in the third energy level?
Answer:
1 s-orbital, 3 p-orbital and 5 d-orbital
Answer:
there are a total of nine orbitals in a third energy level
Explanation:
If 0.45 mole oxygen gas occupies a volume of 1.5 L, what volumes will 2.0 moles of oxygen gas occupy at the same temperature and pressure?
please don't send YouT8ube link i need a solution
Answer:
1. How many moles of oxygen will occupy a volume of 2.5 liters at 1.2 atm and 25° C? PV = V (1.2 n. 0821) (298) = 123 mols 2.
2.0 moles of oxygen gas will occupy a volume of 6.67 L at the same temperature and pressure.
Moles is a unit of measurement used in chemistry to express the amount of a substance. It is a counting unit that represents the number of particles, such as atoms, molecules, or ions, in a given sample.
One mole of a substance is defined as the amount of that substance that contains Avogadro's number of particles, which is approximately 6.022 x 10²³. This number is based on the concept that atoms, molecules, and ions are extremely small and difficult to count individually, so using moles allows for a more practical and convenient representation of quantities.
Given:
Moles of oxygen gas (initial) = 0.45 mol
Volume of oxygen gas (initial) = 1.5 L
Moles of oxygen gas (final) = 2.0 mol
Volume of oxygen gas (final) = ?
Using the principle of molar volume, we can set up the following ratio:
(0.45 mol / 1.5 L) = (2.0 mol / V)
V = (1.5 L × 2.0 mol) / 0.45 mol
V = 6.67 L
Learn more about Moles, here:
https://brainly.com/question/26416088
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dubnium chloride chemical formula
Answer:
Db
Dubnium/Symbol
Explanation:
please mark my answer in brainlist plz
Answer:
DbCl5
Explanation
Dubnium has 2 electron in 7s orbital and 3 electron in 6d orbital. Because Dubnium is synthetically produced with atomic number of 105, it is highly radioactive and quickly decay. Like other transition, it can have different oxidation state and it is assumed that dubnium have +3,+4,+5 oxidation state number(that most likely involves electron from 6d orbital). Hence chloride ions with -1 oxidation number would react to form Dubnium Chloride as DbCl3, DbCl4, and DbCl5. Now it is highly unlikely these compounds can really be formed. However if you read nature chemistry article https://www.nature.com/articles/nchem.2610, there is mention that DbCl5, DbBr5, and DbOCl3 may be expected to form.
Which pair of elements form an ionic bond with
each other?
A. KCL
B. ICL
C. PCL
D. HCL
I think it’s A and D but if it’s not both can you please explain why it’s one and not the other?
Answer:
Yes Both A) KCL and D) HCL are correct...
Answer:
It's only A
Explanation:
Potassium (K) is a metal and Chlorine (Cl) is a nonmetal, and ionic compounds are formed between metals and nonmetals. So KCl forms ionic bonds.
Hydrogen (H) and Chlorine (Cl) are both nonmetals, and only covalent bonds form between nonmetals. (Only exception is when its an acid, then it's ionic)
Also, the question indicated which "pair" and not "pairs" meaning that there is only one answer, and I'm more likely to go with A rather than D.
about distillation methods
Answer:
Distillation, or classical distillation, is the process of separating the components or substances from a liquid mixture by using selective boiling and condensation. Dry distillation is the heating of solid materials to produce gaseous products
Answer:
Explanation:
Distillation, or classical distillation, is the process of separating the components or substances from a liquid mixture by using selective boiling and condensation. Dry distillation is the heating of solid materials to produce gaseous products.
What volume of 0.100 M AgNO3 is
needed to react completely with
45.0 mL of 0.230 M Na2S?
2AgNO3 + Na2S → Ag2S + 2NaNO3
[?] mL AgNO3
Answer:
448mL AgNO3
Explanation:
M x V
n = 0.230 x .045 = 0.01
2AgNO3 + Na2S --> Ag2S+2NaNO3
1 mol Ag2S --> 2 moles AgNO3
.01 mol Ag2S --> ? moles AgNO3
.01x2/1=.02 moles AgNO3
Moles to L conversion is multiplying by 22.4L so we do .02 x 22.4=0.448L
Then we convert to mL so we multiply by 1000 (1000 x 0.448)
448mL AgNO3
There you go friend, good luck with chemistry :)
is a physiologist. Which would most likely be the main focus of her studies?
how atoms bond to form different kinds of matter
how subatomic particles interact and make up atoms
how certain molecules affect the function of the human heart
how the structure of the human brain may differ between humans
The balanced chemical equation for the conversion of nitrogen to ammonia is:2N₂(g) + 3H2(g)2NH3(g): Which of the following statements concerning this chemical equation is/are correct?
1. In a 22.4 L container at standard temperature, 2 atm of nitrogen gas will react with 3 atm of hydrogen gas to produce 2 atm of ammonia gas.
2. At standard pressure and temperature, 22.4 L of nitrogen gas will react with 22.4 L of hydrogen gas to produce 22.4 L of ammonia gas.
3. At standard pressure and temperature, 44.8 L of nitrogen gas will react with 67.2 L of hydrogen gas produce
22,4 L of ammonia gas
Answer:
At standard temperature and pressure, 44.8
Explanation:
Why do scientists use the scientific method?
A. It helps them do research that other scientists can understand.
B. It helps them ask questions that affect as many people as
possible.
C. It helps them make sure a certain question has not been asked
before.
OD. It helps them determine whether an idea is supported by evidence.
Help
Answer:
DExplanation:
It helps determine whether an idea is supported by evidencehope it helps please follow because I don't have any followers I have 0 followersThe law of conservation of matter states that matter can be neither created nor destroyed. Your friend shows you the following chemical equation: CaCO,CaO+CO, He says that because the oxygen atoms are split between two different molecules in the products, the equation does not support the law of conservation of matter. Is your friend right? Explain your answer.
Answer:
According to conservation of matter, there should be equal amounts of all elements on both the reactant and product side.
Reactant:
1 Ca
1 C
1 O
Product:
1 Ca
1 C
3 O
Therefore, your friend is right because the law of conservation of matter is not followed in this chemical equation.
Explanation: