Answer:
The anser is c
Roman numerals are used to indicate oxidation states. Hence, option C is correct.
What is the oxidation state?An oxidation state is a number given to the atom of an element when participating in a chemical reaction.
Roman numerals are used to indicate oxidation states of transition metals.
The names for transition metal compounds often have roman numerals in them, because the roman numerals indicate the charge on the transition metal. But the oxidation state of Cu in CuO is +2, and the oxidation state of Cu in [tex]Cu_2O[/tex] is +1. Name metal first and charge and transition metal with a roman numeral.
The transition metals may form more than one ion, thus it is needed to be specified which particular ion we are talking about. This is indicated by assigning a Roman numeral after the metal. The Roman numeral denotes the charge and the oxidation state of the transition metal ion.
[tex]Fe^{2+}[/tex] would be named iron (II) and [tex]Fe^{3+}[/tex] would be named iron (III).
Hence, option C is correct.
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What is the charge of this atom?
65 protons
60 electrons
A)-5
B)+5
C)0
Answer:
B. +5
Explanation:
(100 points) Atleast 5 slogans on saving fuel.
Answer:
Save Fuel, Save Earth
Fuel and time wait for none!
Be wise, don’t waste fuel
Save fuel, stop being cruel
Don’t contribute towards global warming
Care for future, save fuel
Hope That Helps!!!
Explanation:
Here are Best Slogans on Save Fuel.
-Towards a better future.
-Save to sustain.
-Save fuel for a better world.
-Make sure to keep some for the next generation.
-Our resources are limited.
-Save to expand.
-Saving fuel has no alternatives.
-Save money while saving fuels.
carbon + oxygen -->
carbon dioxide
balancing equation
Carbon = C
Oxygen = O
CO2 = Carbondioxide
Balanced equation :
C + O2 = CO2
Answer:
co2
Explanation:
c+o2-------------> co2
If the mass is 7150 kg, and the
acceleration is 2 m/s2, then what is the
force?
Explanation:
f= ma
f= 7150 *2
f= 14300N
The force will be equal to 14300N when the mass is 7150 kg and the
acceleration is 2m/s².
What is force?Force is an external agent that can change a body’s state of rest or motion. Force has a direction and a magnitude so it is a vector quantity. The SI unit of force is Newton and the unit used is Kgm/s².
Force can change the state of a body from rest to motion and can accelerate the speed of a moving body. The direction of a moving object can be changed by applying force.
The force is expressed by the product of the mass (m) and acceleration (a) of an object. The mathematical equation for force can be expressed in the form of:
F = ma
Given, the mass (m) = 7150 Kg and acceleration (a) = 2 m/s²
Then, force, F = (7150 Kg) × (2 m/s²)
F = 14300 Kgm/s²
or, F = 14300 N
Therefore, the force of the object will be equal to 14300 N.
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what further observation led mendeleev to create the periodic table
Answer:
;,knbbbknnbkhbln bhbj k; b; m j
Explanation:
can you help me ? directions at the top of the pic.. I only have 30 minutes to do it
Which of these describes a challenge that the engineer of a high-altitude
airplane would need to consider?
A. More fuel is used at higher altitudes.
B. The airplane may succumb to the power of gravity as lift
decreases at higher altitudes.
C. The airplane may need a heat shield for protection from sonic
booms.
O D. The airplane will create more drag at higher altitudes than lower
altitudes.
Answer:
I think its (B)
Explanation:
as when the air thins out at higher elevations, your lift decreases so at some point, the plane cant produce enough lift to overcome gravity.
who know how to do this thank you
Number of neutrons :
Argon=22
Boron=6
Further explanationThere are two components that accompany an element, the mass number and atomic number
Atoms are composed of 3 types of basic particles (subatomic particles): protons, electrons, and neutrons
The Atomic Number (Z) indicates the number of protons and electrons in an atom of an element.
Atomic number = number of protons = number of electrons ⇒ neutral number
Atomic mass is the sum of protons and neutrons
Atomic Number (Z) = Atomic mass (A) - Number of Neutrons
Argon has an atomic number of 18 and a mass number of 39,948
number of neutrons =
[tex]\tt 39.948-18=21,948\approx 22[/tex]
Boron has an atomic number of 5 and a mass number of 10,811
number of neutrons =
[tex]\tt 10.811-5=5.811\approx 6[/tex]
Which indicates how evidence of climate change supports the theory of continental drift?
coal fields in several continents
volcano formation
glacial evidence found in South America
folded mountains in Africa and South America
Glacial evidence found in South America, do indicate how evidence of climate change has supports the theory of continental drift.
Climate change occurs daily all over the world. This is largely due to man's activities that has affected the atmosphere and the earth.Continental drift is simply known as the theory that states that the continents at a time has formed a single landmass, broke up, and drifted to their present locations. Glacial evidence in South America has made man to believe more in the continental drift hypothesis.Conclusively, we can therefore say that Glacial evidence found in South America, do indicate how evidence of climate change has supports the theory of continental drift.
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Answer:
glacial evidence found in South America
Explanation:
Which of the following is not a controllable risk factor?
a. smoking
b. inactivity
c. aging
d. over eating
Answer:
C) Aging
Explanation:
You can't stop that or change the rate that you age at. its inevetable :D
what are green boxes on periodic tables
Answer:
The basic metal ones?
Explanation:
...
Isopentyl acetate is the molecule largely responsible for the aroma and taste of bananas. It is made up of carbon, hydrogen, and oxygen. Combustion of a 3.256-g sample of isopentyl acetate produces 7.706 g CO2 and 3.156 g H2O. Using these results, what is the correct empirical formula for isopentyl acetate?
Answer:
Explanation:
7.706 g of CO₂ will contain 12 x 7.706 / 44 g of C
= 2.1 g of C .
This will be contained in 3.256 g of isopentyl acetate
3.156 g of H₂O will contain 2 x 3.156 / 18 g of H
= .351 g of H
This will be contained in 3.256 g of isopentyl acetate
Rest will be oxygen
amount of oxygen in 3.256 g of isopentyl acetate
= 3.256 - ( 2.1 + .351 )
= .805 g
ratio of C , H , O in isopentyl acetate
= 2.1 g : .351 g : .805 g
2.1 / 12 : .351 / 1 : 0.805 / 16 ratio of moles
= .175 : .351 : .05 ratio of moles
= 3.5 : 7.02: 1
= 7 : 14 : 2
empirical formula of isopentyl acetate
= C₇ H₁₄ O₂ .
Calcium nitrate and calcium carbonate are both ionic compounds.
Calcium nitrate mixed with water behaves as an electrolyte.
Calcium carbonate mixed with water does not behave as an electrolyte.
Explain, in terms of solubility and movement of ions, this difference in behaviour
Answer:
Calcium nitrate is soluble in water and dissociate into ions whereas calcium carbonate is insoluble and water and do not form ions.
Explanation:
An electrolyte is a substance which conducts electricity in molten form or when dissolved in water.
The ability of an electrolyte to conduct electricity is due the movement of charged particles called ions. The ions are of two types: negatively charged ions called anions and positively charged ions called cations.
Calcium nitrate is a soluble in water, and when dissolved in water produces two ions; negatively charged nitrate ions,NO₃⁻, and positively charged calcium ions, Ca²⁺. These ions enable it to conduct electricity.
Calcium carbonate on the other hand is insoluble in water, and thus, do not produces any ions capable of carrying current.
Which is composed of aromatic hydrocarbons?
clothing
barbeque fuel
pain relievers
O polyvinyl chloride
Answer:
the answer is pain relievers
Which is composed of aromatic hydrocarbons?
clothing
barbeque fuel
pain relievers
polyvinyl chloride
Pain relievers are composed of aromatic hydrocarbons. Therefore, option C is correct.
What are aromatic hydrocarbons ?Hydrocarbons with delocalized pi electrons and sigma bonds between their carbon atoms are known as aromatic hydrocarbons. One example is benzene. Since they smell, they are said to as aromatic.
One aromatic ring makes up monocyclic aromatic hydrocarbons (MAHs). The well-known environmental contaminants benzene, toluene, ethylbenzene, and xylenes are among the most combustible and water-soluble aromatic hydrocarbons (BTEX).
The typical aromatic parent structure is benzene. When the benzene ring is a substituent, it is referred to as a phenyl group.
Thus, Pain relievers are make up of aromatic hydrocarbons, option C is correct.
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If a net force of 4 N caused a football to accelerate 8 m/s2 across a football field, what was the mass of the football?
Answer:
Mass is .5kg
Explanation:
F=ma, plug in your numbers:
F=4N
A=8m/s^2
4=m8
m=4/8
Suppose that green spheres represent chlorine atoms, yellow-green spheres represent fluorine atoms, white spheres represent hydrogen atoms, and all the molecules are gases
Answer:
a. Reactants: F₂ and HCl molecules
Products: Cl₂ and HF
b. 4HCl + 2F₂ ----> 4HF + 2Cl₂
c. Single replacement reaction
Note: The question is not complete. The complete question is found below as well as in the attachment.
Suppose that green spheres represent chlorine atoms, yellow-green spheres represent fluorine atoms, white spheres represent hydrogen atoms, and all the molecules are gases:
a. write a formula for each of the reactants
b. write a balanced equation for the reaction
c. indicate the type of reaction as combination,decomposition, single replacement, double replacement, or combustion
Explanation:
a. From the models shown in the diagram, The reactants are F₂, HCl while the products are Cl₂ and HF respectively
b. Equation for the reaction is given below;
4HCl + 2F₂ ----> 4HF + 2Cl₂
c. The reaction is single replacement reaction such that fluorine gas molecules replace the chlorine atoms in hydrogen chloride to form hydrogen fluoride with the liberation of chlorine atoms as gaseous molecules.
4 Identify What are the starting materials
and products of photosynthesis and cellular
respiration?
Answer:
Detail is given below.
Explanation:
Photosynthesis:
Reactants = Carbon dioxide + water + energy
Products = glucose + oxygen
Chemical equation:
6H₂O + 6CO₂ + energy → C₆H₁₂O₆ + 6O₂
It is the process in which in the presence of sun light and chlorophyll by using carbon dioxide and water plants produce the oxygen and glucose.
water is supplied through the roots, carbon dioxide collected through stomata and sun light is capture by chloroplast.
Cellular respiration:
Reactants = Glucose + oxygen
Products = carbon dioxide + water + 38ATP
Chemical equation:
Glucose + oxygen → carbon dioxide + water + 38ATP
It is the breakdown of glucose molecule in the presence of oxygen to yield large amount of energy. Water and carbon dioxide are also produced as a byproduct.
Which family of elements has six electrons in d-type orbitals?
Answer: Selenium is a member of the sulfur family with elements including tellurium and polonium. This family has six electrons in the outermost shell. Selenium specifically has an electron configuration of 2-8-18-6. The six electrons in the outermost shell allow selenium to have a variety of valence numbers.
Explanation:
Tendency of an object to float
Answer:
Buoyancy is the ability or tendency of an object to float in a fluid: a liquid or a gas. This happens because fluid pressure increases with depth. According to Archimedes' Principle, the buoyant force on a submerged object is equal to the weight of the liquid displaced by the object.
Explanation:
1 Select the correct answer! Which statement best explains the octet rule? A. Atoms gain, lose, or share electrons to achieve a full valence shell. D B. Compounds always consist of eight electrons. oa. |||||Molecules always consist of eight atoms. OD. All atoms require eight electrons to form bonds. Reset Next Entum. All rights reserved.
Answer:
A. Atoms gain, lose, or share electrons to achieve a full valence shell
Explanation:
The octet rule is best explained as the process in which atoms lose or gain or share electrons to achieve a full valence shell.
In this process bonds are formed when there is an attraction between the two substances. For electrovalent compounds, an atom will lose electrons or gain electron to form an ion, the electrostatic attraction causes the bond formation. Covalent compounds, form by sharing of electrons.Therefore, the octet rule is attained when atoms gain full valence configuration.
An ionic compound is
A.a salt
B.held together by a transfer of electrons
C.composed of anions and cations
D.held together by sharing of valence electrons
A year has 365 days, and a day has 24 hours. If an hour has 60 minutes and a minute has 60 seconds, how many seconds are there in 1 year?
54,750 s
525,600 s
3.15 Times. 107 s
1.89 Times. 109 s
Answer:
31,536,000 seconds
Explanation:
off google
Answer:
3.15 x 10^7s
Explanation:
Now look closely at the patterns in the table. Compare the elements in each column and
row. What can we say about elements in the same group and elements in the same period
of the periodic table?
Select all the correct answers.
- The number of electrons in the second energy level increases by one down each
column.
Elements in the same row have the same number of ocupied energy levels.
For each column, the last occupied energy level has the same number of electrons.
The number of electrons in the first energy level increases by one from Li to Ne.
Answer:
A the first 1
Explanation:
What is the difference between a hyrdrogen atom and a hydrogen molecule?
Answer:smaller
Explanation:
Answer:
Explanation:
A hydrogen atom (H) is bonded to form hydrogen gas(H2)(a molecule)
what is the formula for dihydrogen tetraoxide
It's been a while... but I'm pretty sure it's
H₂O₄
What is the density of a 6 g of pure copper with a volume of 12 mL?
a 0.25 g/mL
b 1.5 g/mL
c 2.3 g/mL
d 0.5 g/mL
Answer:
The density of copper is 0.5 g/mL
Explanation:
Given data:
Mass of copper = 6 g
Volume of copper = 12 mL
Density of copper = ?
Solution:
Formula:
d = m/v
d = density
m = mass
v = volume
d = 6 g/ 12 mL
d = 0.5 g/mL
Thus, the density of copper is 0.5 g/mL
Why do you think Earth's plates move on the surface?
Explanation:
heat in the Earth's core
10. A(n) eclipse occurs at a full moon when Earth is directly between the moon and the sun.
Answer:
Yes indeed
Explanation:
24H2S + 16HNO3 3Sg+ 16NO + 32H2O
Answer:
24 sultur with 48hydrogen+16 hydrogen,nitrogen and 48 oxygen+16 nitrogen,16 oxygen+62hydrogen and 32 oxygen
Explanation:
plsss helpppp
im confused i dont know the answer
pls
N and C
_____________________________________WHY OPTION A?Because Lithium and Sodium belong to group 1A whereas Magnesium is from group 2A, which are S block elements and they form ionic bond.
_____________________________________HOPE IT HELPS!Answer:
N and C
Explanation:
Os the right answer
