Answer:
ice land should be it
Explanation:
Answer:
Iceland is the answer.
Explanation:
isotopes Mg-24,Mg-25 and Mg-26 has natural abundance of 79.0%,10.0% and 11.0%. Calculate the relative atomic mass for isotopes Mg-24,Mg-25 and Mg-26.
Please help me with with this question....
How many moles of ions are there in 1 mole of iron (III) oxide, Fe2O3?
Answer:
So one mole of Fe2O3 contains two moles of Fe3+ ions.
Explanation:
As there is an internal mole ratio of 2:3
It means that there are 2moles of iron within every mole of iron(III) oxide.
Iron III oxide is an ionic compound composed of Fe3+ ions and O2- ions. According to the formula, there are three O2- ions for every two Fe3+ ions.
Extra:
One 'unit' of Fe2O3 has two Fe3+ ions and three O2- ions, hence a dozen Fe2O3 contains two dozen Fe3+ ions and three dozen O2- ions, and a mole Fe2O3 contains two moles Fe3+ ions and three moles O2- ions.
Someone pls help me I will make you brain
Answer:
Lung function decreses at a faster rate for young people (last answer choice)
Explanation:
Coffee has a pH of about 5. Therefore, coffee is -
Question 6 options:
neutral
extremely acidic
somewhat acidic
basic
Answer:
The answer to your question is Basic
Explanation:
pH ranges from 0 to 14, with 7 being neutral. pHs less than 7 are acidic while pHs greater than 7 are alkaline (basic).
I hope this helps!
A fictitious element X is composed of 10.0 percent of the isotope 55 X, 20.0 percent of the
isotope 56 X, and 70.0 percent of the isotope 57 X. Estimate the atomic mass of element X.
Answer:
56.6 g/mol.
Explanation:
Assuming here that we have 100 atoms of each element. The percentage tells us that we have 10 atoms of the 55 isotope, 20 of the 56, and 70 of the 57.
So the total is 10*55 + 20*56 + 70*57 = 5,660. And to get the average, we just divide by the total number of atoms (100).
Atomic mass = 5660/100 = 56.6
what is the condensed electron configuration for nitrogen
Answer:
In writing the electron configuration for nitrogen the first two electrons will go in the 1s orbital. Since 1s can only hold two electrons the next 2 electrons for N goes in the 2s orbital. The remaining three electrons will go in the 2p orbital. Therefore the N electron configuration will be 1s22s22p3.
Explanation:
hope you get it right:)
Answer:
the electron configuration for N will be 1s^2 2s^2 2p^3
hi. i need help with this. i lack with this subject
Answer: It's the circulatory system
Explanation:
HELP QUICKLY
What happens to food molecules during cellular respiration?
They undergo chemical reactions with carbon dioxide, releasing stored energy.
They undergo reactions in which the atoms are destroyed to produce energy.
They undergo chemical reactions to produce large, complex molecules.
They undergo chemical reactions with oxygen, releasing stored energy.
Answer: They undergo chemical reactions with oxygen, releasing stored energy.
Explanation:
I took my k12 7th grade science unit test and got this question correct.
Have a good day and drink some water plz
The food molecules during cellular respiration they undergo chemical reactions with oxygen, releasing stored energy.
What is chemical reaction?Chemical reaction is defined as a procedure in which one or more substances, known as reactants, are converted into one or more different substances, known as products.
It can also be defined as a method of chemically transforming one set of chemical substances into another.
There are basically six types of chemical reaction.
Combustion reactionDecomposition reactionNeutralization reactionRedox reactionPrecipitation reactionSynthesis reactionCellular respiration is defined as the process of oxidizing biological fuels in the presence of an inorganic electron acceptor such as oxygen to produce large amounts of energy, which drives the bulk production of ATP.
It can also be defined as the process by which sugar from food is converted into energy within cells.
Thus, the food molecules during cellular respiration they undergo chemical reactions with oxygen, releasing stored energy.
To learn more about chemical reactions, refer to the link below:
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A sample of an unknown solid is found to have a volume of 24.3 cm3 and a mass of
217.0 grams. What is the density of the unknown
Density = mass ÷ volume
= 217.0 g ÷ 24.3 cm³
= 8.93 g/cm³
∴ the unknown sample of mass 217.0 grams and volume of 24.3 cm³ has a density of 8.93 g/cm³.what type of nuclear
Answer:
fussion
your welcome
What evidence is there to support the theory that strong nuclear force is greater than electromagnetic force?
A: Electrons are attracted to protons.
B: Protons repel other protons.
C:The nucleus holds the protons together.
D:Protons and neutrons are attracted to each other.
Answer:
The electromagnetic force is a long range force which acts of charged particles. Like charges repel and unlike charges attract. ... The strong nuclear force is very short range and can only bind adjacent protons and neutrons. The electromagnetic force is long range.
Explanation:
Which statement best describes a physical change?
1 Changes can occur to certain chemical properties of the substance, but the overall shape of the substance will remain the same.
2 Changes can occur to certain physical properties of the substance, but the overall shape of the substance will remain the same.
3 Changes can occur to physical properties of a substance, but the chemical composition of the substance remains the same.
4 Changes can occur to chemical properties of a substance, but the chemical composition of the substance remains the same.
Answer: 3 Changes can occur to physical properties of a substance, but the chemical composition of the substance remains the same
Explanation:
Physical change mainly physical properties of a substance while the chemical changes remain unchanged. Once there is a change to the chemistry of the substance, this would be classified as a chemical change.
How many chiral carbon atoms are present in a molecule of 2,3,4-trichloropentane?
Answer:
The answer is 2.
Explanation:
o Neutralization reactions are a type of__________
reactions.
• The removal of hydrogen ions and hydroxide ions from solution as they form________
causes the pH of the mixture to_________.
If the right amounts of acid and base react, the
resulting solution will be________
Answer:
nala
simba
Explanation:
why don't electrons, which are attracted to the protons in the nucleus, simply fall into the nucleus?
Answer:
electrons are fermions, they can only access an energy level if it has not already been occupied by another electron. Thanks to this principle, there is a minimum energy level within the atom and it is not possible for an electron to collapse to the nucleus because it cannot exceed this} threshold.
Explanation:
I hope I have helped you.
Which sequence is used to separate a soluble salt from a mixture of a soluble and an insoluble
salt?
A
add solvent, heat the mixture, crystallise the mixture
add solvent, heat the mixture, filter, crystallise the filtrate
B
C
heat the mixture, filter, crystallise the filtrate
heat the mixture, filter, add solvent, crystallise the filtrate
D
Which law specifically combines volume, pressure, and temperature only?
Charles's Law
Gay-Lussac's Law
Combined Gas Law
Ideal Gas Law
Answer:
Boyles law
Explanation:
I think that is combined gas law.
Look at the image shown.
Two H are written with a horizontal straight line between them. (H-H)
What does this image represent?
Linear molecule with one domain
Linear molecule with two domains
Tetrahedral molecule with four domains
Trigonal planar molecule with three domains
Explanation:
It is known that an electron pair represents a domain. Hybridization of BF_{3}BF3 will be calculated as follows.
Hybridization = \frac{1}{2}[\text{Valence electrons of central atom + no. of bonded atoms + negative charge - positive charge}]21[Valence electrons of central atom + no. of bonded atoms + negative charge - positive charge]
Valence electrons of boron are 3 and no. of bonded atoms in a BF_{3}BF3 molecule is 3.
Therefore, calculate hybridization of BF_{3}BF3 as follows.
Hybridization = \frac{1}{2}[\text{Valence electrons of central atom + no. of bonded atoms + negative charge - positive charge}]21[Valence electrons of central atom + no. of bonded atoms + negative charge - positive charge]
= \frac{1}{2}[3 + 3 + 0]21[3+3+0]
= 3
Hence, hybridization of BF_{3}BF3 is sp^{2}sp2 , that is, trigonal planar.
Thus, we can conclude that the given image represents that it is a trigonal planar molecule with three domains.
Answer:
electron pair => 1 covalent bond => same as H:H
Explanation:
The bar notation is generally accepted as a pair of electrons depicting a 'single' chemical bond. If two bars are shown (e.g; C=C) then two chemical bonds are represented. If three bars are shown (e.g; N≡N) then three chemical bonds are represented. This is the highest number of bonds that can exist between two elements. Hope this helps. :-)
how does the advancement of medical technology increase the number of medical ethical issues that arise?
Answer:
People are getting richer and richer as technology advances, this may make it so that some people are getting treated unfairly. Signs of little money may support the reason that you are not getting the help you need; this means that health problems would arise more, resulting in an unfair lifestyle.
Someone pls help me I will make you brain
Answer:
i cant read it but its c and a
Explanation:
my thinking faces
Where in the cell do most aerobic respiration take place?
a)
mitochondria
b)
cell membrane
c)
nucleus
What happens in the following cases. [ ( write two eg for each also write is there any ex
change of energy ) ] i) when an element combine with another element. ii) When an element combine with a compound. iii) When a compound combine with another compound.
mjhhhhhhhhhhmmmmnnñbb
The speed of light is 300,000,000 m/s. What is the frequency of a wave with a wavelength of 6 meters?
Answer:
50,000,000 Hz
Explanation:
Rearrange the formula:
wave speed = frequency × wavelength → frequency = wave speed ÷ wavelength
wave speed = 300,000,000m/s
wavelength = 6m
Substitute in the values:
frequency = 300,000,000 ÷ 6
frequency = 50,000,000 Hz
Hope this helps!
Which process causes the greatest increase in the distance between particles?
Answer: The condensation is the process which causes distance.
what is the empirical formula of a compound that contains only iron and oxygen and is 22.27% oxygen?
Answer:
A) FeO
Explanation:
Options:
A) FeO
B) FeO2
C) Fe2O
D) Fe7O2
The correct answer is A) FeO.
(Hope this helps can I pls have brainlist (crown)☺️)
The empirical formula of a compound that contains only iron and oxygen and is 22.27% oxygen is FeO. The correct option is A.
What is the empirical formula?The simplest whole number ratio of atoms in a chemical molecule is its empirical formula. The empirical formula is the chemical formula that gives the number of atoms of the chemical formula that is given in the chemical reaction.
For example, the C₆H₁₂O₆ is the formula of glucose. The simplest formula is CH₂O. This will be the simplest ratio of this compound. The first one, this C₆H₁₂O₆ is the molecular formula.
It only contains the element one quantity. The empirical formula that contains oxygen and iron will be FeO. The empirical formulas is calculated by dividing the simplest formula.
Thus, the correct option is A) FeO.
To learn more about empirical formulas, refer to the link:
https://brainly.com/question/14044066
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The question is incomplete. Your most probably complete question is given below:
A) FeO
B) FeO2
C) Fe2O
D) Fe7O2
Someone pls help me I will make you brain
The phenomenon is known as the Greenhouse Effect.
When the sun's energy reaches the Earth, some is reflected into space, but the rest is absorbed by gases and warms the atmosphere. The phenomenon is known as the Greenhouse Effect.
write the 5 major characteristics of traditional map making
Answer:
insta
Explanation:
Zak_1231 follow me
How many grams of Hydrogen (H) would need to react with 143 grams of Oxygen (O) to make 235 grams of Water (H20)? 235
Answer:
45 grams
Explanation:
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ur answer will be reported if u do
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First State : Punjabsoil - Alluvial soil
crops - Cotton, wheat, sorghum, bajra, maize, barley, jute, tobacco, green and black gram, chickpea, pigeon pea, etc.
Suitable properties : Mix of sandy loam and clay soil. Quick draining in nature. Rich in humus (organic matter) and phosphoric acid
Second state : Maharashtrasoil - black soil
Crops - Cotton is the major crop. Other crops include wheat, cereals, rice, jowar, sugarcane, linseed,
Suitable properties : Black soils get sticky when fully wet. Rich in magnesium, iron, aluminum, and lime. They moisture excellently.
Third state : Orrisasoil - laterite soil
crops - wheat, rice, pulses, rubber, tea, coffee, coconut, and cashews.
suitable properties : These Soils are acidic in nature and coarse and crumbly in texture. it is also rich in iron content.
Fourth state : Rajasthansoil - Arid soil
crops - Barley, maize, wheat, millets, cotton, and pulses.
Suitable properties - Sandy soils with low clay content, Saline in nature. Rich in plant food. Poor in organic matter and moisture because arid regions are usually dry.
Fifth state : Sikkimsoil - Mountain and Forest Soil
Crops- Wheat, barley, maize, tea, coffee, spices, tropical and temperate fruits.
Suitable properties - Acidic soil, rich in organic matter. Poor in lime, phosphorus, and potash. Good fertilization is required in these soils.
What is the nutrient indicator of Amino Acids?
Answer:
An essential amino acid, or indispensable amino acid, is an amino acid that cannot be synthesized from scratch by the organism fast enough to supply its demand, and must therefore come from the diet.
Explanation:
Hope it helps you