Answer:
[Ar] 3d¹⁰ 4s² 4p³
Explanation:
so...... ur welcome
Use Figure 5-5 to determine the types of radiation described in problem 5
Answer:6.12 x 10¹⁴ s⁻¹
Objects get their colors from reflecting only certain wavelengths when hit with white light. Light reflected from a green leaf is found to have a wavelength of 4.90 x 10⁻⁷ m. What is the frequency of the light?
Explanation:
Answer: 6.12 x 10¹⁴ s⁻¹
Explanation:
is francium found in nature or lab?
Answer:
It was the last element first discovered in nature, rather than by synthesis. Outside the laboratory, francium is extremely rare, with trace amounts found in uranium and thorium ores, where the isotope francium-223 continually forms and decays
How much more pressure does a 250 lb person exert on the ground than a 120 lb person if they are both standing on one foot with area 16 in2?
Answer:
57.124.18 Pascals
Explanation:
The pressure that each person exerts on the ground is given by:
Pressure = force/area
The force that each person exert is given by:
Force = mass (kg) x acceleration due to gravity (10 m/s2)
1 lb = 0.4536 kg, hence;
250 lb person = 113.398 kg
120 lb person = 54.431 kg
Force exerted by the 250 lb person = 113.398 x 10 = 1133.98 kg/m2
Force exerted by 120 lb person = 54.431 x 10 = 544.31 kg/m2
16 inch2 = 0.0103226 m2
Pressure exterted by 250 lb person = 1133.98/0.0103226
= 109,854.11 pascals
Pressure exerted by 120 lb person = 544.31/0.0103226
= 52,729.93 Pascals
Difference in pressure = 109,854.11 - 52,729.93
= 57,124.18 Pascals
Hence, a 250 lb person will exert 57.124.18 Pascals pressure more than a person of 120 lb on a foot with a 16 inch2 area.
Read the statement about Mount Vesuvius. Mount Vesuvius erupted in 79 CE and destroyed the ancient city of Pompeii. Why is the statement free of bias? It is based on opinion. It is a fair statement of fact. It expresses one specific view. It exaggerates details of the event. Explain good or ill report
Answer:
It is a fair statement of fact
Explanation:
The statement is a fact that is unopinionated and it does not exaggerate details of the event it just states the fact without opinions or exagerrations. This is why its unbiased.
The statement that is given is free of bias because It is a fair statement of fact. The correct option is B.
What is a statement?A statement is affirmative that is proposed and based on facts or the condition of the situation. It is a declaration. Statements don't pose queries, issue requests, or issue directives. They are not exclamations, either.
Scientific statements are generally based on facts and true results that came from an experiment. Like the one here, about Mount Vesuvius.
The statement simply tells the truth without opinions or exaggerations; it is a fact that is opinionated but does not embellish the specifics of the occurrence. This is why it is objective.
Thus, the correct option is B. It is a fair statement of fact.
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Consider phosphoric acid, H3PO4. What is the total number of moles of H+ available for reaction in 4.50 L of 0.750 MH3PO4? Write your answer as a numerical value without any units. Type your numeric answer and submit
What mass of sodium hydroxide will neutralize completely 3.612 moles of HCl?
Answer:
NaOH + HCl = NaCl + H2O
(3.612 moles of HCl) x (1/1) x (39.9971 g/mol) = 144.5 grams
So answer B.
Explanation:
NaOH + HCl = NaCl + H2O
(3.612 moles of HCl) x (1/1) x (39.9971 g/mol) = 144.5 grams
To solve such this we must know the concept of double displacement reaction. Therefore, 144.48g sodium hydroxide will neutralize completely 3.612 moles of HCl.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
The balanced reaction is
NaOH + HCl = NaCl + H2O
To neutralize completely 3.612 moles of HCl, 3.612 moles of NaOH is required.
mass of NaOH =Mole× Molar mass of NaOH
mass of NaOH=3.612× 40 g/mol
mass of NaOH=144.48g
Therefore, 144.48g sodium hydroxide will neutralize completely 3.612 moles of HCl.
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Which equation best represents the balanced net ionic equation for the reaction that occurs when aqueous solutions of lithium phosphate and magnesium nitrate are mixed?
Answer:
2 PO₄³⁻(aq) + 3 Mg²⁺(aq) ⇒ Mg₃(PO₄)₂(s)
Explanation:
Let's consider the molecular equation that occurs when aqueous solutions of lithium phosphate and magnesium nitrate are mixed.
2 Li₃PO₄(aq) + 3 Mg(NO₃)₂(aq) ⇒ 6 LiNO₃(aq) + Mg₃(PO₄)₂(s)
The complete ionic equation includes all the ions and insoluble species.
6 Li⁺(aq) + 2 PO₄³⁻(aq) + 3 Mg²⁺(aq) + 6 NO₃⁻(aq) ⇒ 6 Li⁺(aq) + 6 NO₃⁻(aq) + Mg₃(PO₄)₂(s)
The net ionic equation includes only the ions that participate in the reaction and insoluble species.
2 PO₄³⁻(aq) + 3 Mg²⁺(aq) ⇒ Mg₃(PO₄)₂(s)
Why is cellular respiration important?
A or B?
A. It changes energy in glucose into energy that can be used.
B. It changes radiant energy into chemical energy for all living things.
What reaction shows a compound breaking apart into separate substances?
A. A single-replacement reaction
B. A synthesis reaction
C. A double-replacement reaction
D. A decomposition reaction
Answer: The answer is decomposition reaction
Explanation: Hope this helps:)
Answer: D. decomposition reaction
Explanation:
Help plz:))) I’ll mark u brainliest ASAP 10 points
3 elements that have similar properties
Answer:The elements in the first column of the Periodic Table (other than hydrogen) are known as Group 1A metals, or alkali metals. When you compare the chemical properties of these elements (lithium, sodium, potassium, rubidium, cesium, and francium), what you'll notice is that they are all remarkably similar.
Explanation:
Lithium, sodium, and potassium are the three elements from group number 1 of the periodic table that has similar chemical and physical properties, these group 1 metals are also known as alkali metals.
What is the atomic number?The total number of protons present in an atom is known as the atomic number of that atom. The atomic number has no correlation either with the number of neutrons or the number of electrons present inside an atom.
Group 1 metals, often known as alkali metals, are a trio of elements from the periodic table that have similar chemical and physical characteristics. They are lithium, sodium, and potassium.
Thus, Lithium, sodium, and potassium are the three elements from group number 1 of the periodic table that has similar chemical and physical properties.
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what's element on the periodic table has the symbol w
Answer:
W is tungsten on the periodic table
Which structure vibrates the hammer?
stirrup
ear canal
eardrum
anvil
Answer:
Yes, the correct answer is C) Ear Canal
Explanation:
Which of the following physical properties is NOT characteristic of a metal?
A.Malleable
B.Solid at room temperature
C.Dull in color
D.Good conductors
using the ideal gas law, PV=nRT, where R=0.0821 L atm/mol K, calculate the volume in liters of oxygen produced by the catalytic decomposition of 25.5 g potassium chlorate according to the following reaction. The oxygen is collected at 2.22 atm and 25.44 C. express your answer to the correct number of significant figures.
2KClO3(s) ---> 2KCl(s) + 3O2(g)
Answer:
V = 2.32 Liters
Explanation:
PV = nRT => V = nRT/P
n = 25.8g/122g/mole = 0.21 mole
R = 0.08206 L·atm/mol·K
T = 25.44°C + 273 = 298.44K
P = 2.22 atm (given in problem)
V = (0.21mol)(0.08206 L·atm/mol·K)(298.44K)/(2.22atm) = 2.32 Liters at 25.44°C & 2.22atm
i need the answer for this
Answer:
need points
Explanation:
Can a trout and a catfish be members of the same population?
Answer:
Most likely. They eat different prey items so they would use niche partitioning. for example the leopards and lions of africa. They are both large carnivores, but are able to coexist by evolving to prey on different animals.
Explanation:
the ATOMIC WEIGHT OF ALUMINUM (AL) is 26.98. It has 14 neutrons. Aluminum has ?
a. an atomic mass of 13
b. an atomic number 13
c. 26 electrons
d. 26 protons
I believe b. an atomic number 13. is the answer.
The atomic weight of Aluminum (AL) is 26.98. It has 14 neutrons. Aluminum has an atomic number 13. Therefore, option B is correct.
What is atomic number?The atomic number of an element represents the number of protons in the nucleus of its atoms. Since the atomic number of an element is unique and determines its position in the periodic table, aluminum has an atomic number of 13.
The number of electrons in a neutral atom is equal to the number of protons, which in this case is 13. Therefore, aluminum has 13 electrons.
The atomic weight of aluminum (Al) is 26.98, which represents the weighted average mass of all the naturally occurring isotopes of aluminum, taking into account their relative abundances. The number of neutrons in an atom of aluminum is given as 14.
Thus, the correct option is B.
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What effect does the transfer of electrons have on the nuclei of the atoms involved?
Answer:
Chemical processes have no effect on the nucleus otherwise we would be in deep truble. GOOD LESSONS ♡
For the presentation you will research and provide summaries for manned and unmanned explorations of your choice. The presentation should be about twelve slides in length. Your presentation will include:
Title
Introduction – gives an overview of the presentation
Time line of missions – must include 3 manned and 3 unmanned missions
Description of each of the missions in the timeline (1 mission per slide)
Name and date of mission
Purpose of missions
Results or findings from missions
Scientific advance – describe a scientific advancement that has led to an engineering improvement in space exploration
Engineering advance – describe an engineering advance that has led to greater knowledge about the solar system
Sources – list the websites and other sources you used
Remember to make a list (i.e., bullet points) on each slide. The slides should feature the highlights of the main idea. The bullet points should be short phrases (at most, one sentence) that highlight key points.
Answer:
Thank u ?
Explanation:
i don't get your question can you rephrase it pls
Answer:
Look this up on g00gle it will give it right to you! :)
Explanation:
how many valence electrons in an oxygen atom?
Answer:
6 valence electrons
Explanation:
Valence electrons are the electrons in the outermost shell, or energy level, of an atom. For example, oxygen has six valence electrons, two in the 2s subshell and four in the 2p subshell.
Which is the order of these solutions from strong acid to strong base?
Solutions:
household ammonia
battery acid
baking soda
stomach acid
antacid
A-stomach acid household ammonia battery acid antacid baking soda
B-battery acid stomach acid antacid baking soda household ammonia
C-battery acid stomach acid baking soda antacid household ammonia
D-stomach acid battery acid antacid baking soda household ammonia
Answer:
First is battery acid with a pH of 1, second is stomach acid with a pH of 1.5-3.5 (depends), third is antacid with a pH of 7, fourth is baking soda with a pH of 9, and finally, fifth is household ammonia with a pH of 11.
Here is a picture of the pH levels to better help you understand.
Answer:
b
Explanation:
What is the product of the reaction?
Please answer with the correct answer! Thanks.
Answer:
compound
Explanation:
it is calcium oxide, also known as quicklime
Can someone help me please
Describe a chemical property of iron that you observed.
Answer:
Iron can rust in damp conditions. Or, it can dissolve readily in dilute acids.
Explanation:
What happens when a wire passes through a magnetic field?
Answer:
If a coil of wire is placed in a changing magnetic field, a current will be induced in the wire. This current flows because something is producing an electric field that forces the charges around the wire. (It cannot be the magnetic force since the charges are not initially moving).
Explanation:
Answer:
When a conductor moves through a magnetic field, there will be a generated motional emf. This is one example of Faraday's Law and it arises from the magnetic force. The voltage generated in a length of wire, presuming that the entire length moves through a uniform field, is given below.
Explanation:
To be honest I just googled
Which of the following best describes foliated metamorphic rocks?
A
There are easily recognizable fossils.
B
The rock has ribbon-like layers of bands.
C
They have crystals like igneous rocks.
D
Different sized sediments can be seen.
Answer:
It's C because Metamorphic rocks were once igneous rocks. And, because Gneiss which is a Metamorphic rock has crystals inside of it.
Different rock types appear during rock formation. The best description of foliated metamorphic rocks is that;
B . The rock has ribbon-like layers of bands.Due to the pressure and heat that is exerted on some rock types, there is an alignment or foliation of rocks. The appearance can be described as ribbon-like.
The examples of rocks that fall under this classification are slate, phyllite, gneiss, and schist.
The non-foliated rocks do not show any alignment in their minerals. Examples are; quartzite, marble, and novaculite.
Summarily, option B best describes a foliated metamorphic rock.
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After food is consumed, chemical nutrients are absorbed into the blood. The blood then carries these nutrients to the body's cells where the nutrients enter mitochondria. Which reaction must occur next for the cell to carry on other activities?\
Answer:c. oxygen,light,and glucose combine to produce high energy molecules
Explanation:
Which element has the same number of electrons in the outermost energy level at Lithium?
Answer:
Hydrogen, lithium, sodium, and potassium all have 1 valence electron ( an electron in the outermost energy level is a valence electron).
what is the empirical formula of vitamin A ( C=83.85, H=10.56, O=5.58)
The empirical formula of vitamin A : C₂₀H₃₀O
Further explanationThe empirical formula is the smallest comparison of atoms of compound =mole ratio of the components
The principle of determining empirical formula
Determine the mass ratio of the constituent elements of the compound. Determine the mole ratio by dividing the percentage by the atomic massmol ratio of C : H : O ⇒
[tex]\tt \dfrac{83.85}{12}\div \dfrac{10.56}{1}\div \dfrac{5.58}{16}\\\\6.9875\div 10.56\div 0.34875\rightarrow divide~by~smallest(0.34875)\\\\20\div 30\div 1[/tex]
