Answer:
1 molecule of glucose contains 6 atoms
Explanation:
Answer:
there are 6 atoms :)) I think so
How many total atoms are in 3.3 moles of potassium sulfide, K2S?
Which statements are correct about a flowering plant? It may have both male and female flowers. It may have only male or female flowers. It may have both male and female parts in the flower. It must have both male and female parts in the flower.
Answer: the last one, It must have both male and female parts in the flower.
Explanation:
If air is contaminated with unwanted substances, it is said to be polluted. Which of these places would most likely to have polluted air?
(a) Village
(b) Forest
(c) Industrial area
(d) Residential area
Answer:
Forest. Because as u saw last year with the Australian forest fire it was bad.
Industrial area would most likely to have polluted air. Therefore, the correct option is option C.
What is pollution?Pollution, also known as environmental pollution, is the addition of any material or energy source to the environment with a rate that is greater than its capacity for dilution, decomposition, recycling, or storage in a safe form. The three main types of pollution were air pollution, water contamination, and land pollution, which are often categorised by environment.
Particular pollutant kinds, like plastic, light, and noise pollution, are also of concern to contemporary civilization. Pollution of all kinds frequently has an adverse effect on the health and wellbeing of people as well as the environment and wildlife. Industrial area would most likely to have polluted air.
Therefore, the correct option is option C.
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Write the correct formula for the following compounds.
1. One ingredient in organic fertilizer contains an equal number of sodium and nitrogen atoms and three times as many oxygen atoms as nitrogen
atoms.
2. A major component of rocket fuel is hydrazine, a compound which contains two nitrogen atoms and twice as many of hydrogen atoms.
3. One of the gases responsible for acid rain contains sulphur atom for every three atoms of oxygen.
4. This compound contains one Lithium atom for every three atoms of Bromine.
5. Butane is a compound that is used as fuel in lighters and camp burners. It contains four carbon atoms and ten hydrogen atoms.
Answer:
79
Explanation:
Which element has 5 energy levels and 2 valence electrons?
Answer:
Element 38: Strontium
Explanation:
define the term valency
Answer:
Valency is the combining power of an element, especially as measured by the number of hydrogen atoms it can displace or combine with
**PLEASE HELP** If you were presented with a preserved brain specimen, but weren’t told whether it was from a human or a sheep, how would you determine which animal it was from? Describe at least three differences you would use to help determine your answer.
Answer:
size-humans brains are usually larger than animals, shape-some animal brains are shaped very odd, and the cerebrum-that is the part of the brain that makes us human.
The three difference between animal brain and human brain will be state out on the basis of size, shape and number of folds.
What is brain?Brain is the main central part of the nervous system of all organism present in the earth.
Three differences between the structure of human brain and animal brain.
Size of the human brain is generally larger than the animal brain.Shape of the brains for humans and animals are different as they both have differnt folds in that.Cerebrum is present only in mammals, so that some animals will not have cerebrum.Hence three differences between human and animal brains are listed above.
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What does a low number on the pH scale say about a solution? O A. The solution is changing, OB. The solution is an acid. O C. The solution is neutral. O D. The solution is a base,
Answer: B) The solution is an acid.
Explanation:
Answer:
B
Explanation:
If 220 grams of C3H8 react with 20 grams of O2, how much CO2 can be formed? help plz
Answer:Hope it can help you!
Explanation:
If 220 grams of C3H8 react with 20 grams of O2, the amount of CO2 formed in the process is 16.5 grams of CO2
The equation for this reaction will be as follows:
[tex]\mathbf{C_3H_8 + 5O_2 \to 3CO_2 + 4H_2O}[/tex]
From the given information:
The number of moles of C₃H₈ present can be computed as:
[tex]\mathbf{no \ of \ mole s= \dfrac{mass}{molar \ mass}}[/tex]
[tex]\mathbf{no \ of \ mole s= \dfrac{220 \ g}{44 \ g/mol}}[/tex]
[tex]\mathbf{no \ of \ moles \ of \ C_3H_8=5 \ moles}[/tex]
The number of moles of O₂ present in the reaction is:
[tex]\mathbf{no \ of \ mole s= \dfrac{20 \ g}{32 \ g/mol}}[/tex]
[tex]\mathbf{no \ of \ moles\ O_2= 0.625 \ moles}[/tex]
Now, from the above-balanced chemical equation, the amount of CO₂ that can be formed depends largely on the amount of O₂ present.
As such;
the number of moles of CO₂ formed can be estimated as:[tex]\mathbf{= \dfrac{0.625 \ moles \ of \ O_2 \times 3 \ moles \ of \ CO_2 }{5 \ moles \ of \ O_2}}[/tex]
[tex]\mathbf{= 0.375 \ moles \ of \ CO_2 \ is \ formed}[/tex]
Since molar mass of CO2 = 44.01 g/mol
The mass of CO2 in grams = 0.375 moles × 44.01 g/mol
= 16.5 grams of CO2
Therefore, we can conclude that the amount of CO2 formed in the process is 16.5 grams of CO2.
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How many joules of heat are absorbed when 73 g water are heated from 30*C to 43*C? *
Answer:
3966.82 J
Explanation:
q=sm∆T
q=73×13×4.18
the specific heat for water is 4.18
Answer:
[tex]\boxed {\boxed {\sf 39,668.2 \ Joules}}[/tex]
Explanation:
We are given the mass and change in temperature, so we must use this formula for heat energy:
[tex]q=mc \Delta T[/tex]
The mass is 73 grams. Water's specific heat is 4.18 J/g × °C. Let's calculate the change in temperature
ΔT= final temperature - initial temperatureΔT= 43 °C - 30°C ΔT= 13 °CNow we know all the variables and can substitute them into the formula.
[tex]m= 73 \ g \\c= 4.18 \ J/g* \textdegree C \\\Delta T= 13 \ \textdegree C[/tex]
[tex]q= (73 \ g )(4.18 \ J/g*\textdegree C)(13 \textdegree C)[/tex]
Multiply the first numbers together. The grams will cancel.
[tex]q= 3051.4 \ J/\textdegree C (13 \textdegree C)[/tex]
Multiply again. This time, the degrees Celsius cancel.
[tex]q= 39668.2 \ J[/tex]
39,668.2 Joules of heat energy are absorbed.
Under what conditions would pressure affect the reaction rate?
A. If the reaction requires the use of a catalyst
B. If the reaction takes place between a solid and a liquid
O c. If the reaction is between two liquids
D. If the reaction occurs in the gas phase
Answer: D. If the reaction occurs in the gas phase
Explanation:
Answer:
D is correct via A P e x
Explanation:
How many moles in 5.125g of NaCl? In equation form!
Plzzzz! HELP ME!
Answer:
0.088mole
Explanation:
Given parameters:
Mass of the compound = 5.125g
Unknown:
Number of moles = ?
Solution:
To solve this problem, we need first find the molar mass of the given compound.
Molar mass of NaCl = 23 + 35.5 = 58.5g/mol
So;
Number of moles = [tex]\frac{mass}{molar mass}[/tex] = [tex]\frac{5.125}{58.5}[/tex] = 0.088mole
what is the phenotype for the genotyep WW ?? I NEED HELP ASAP HELPP MEEEEE
Answer:
The genotype for the pink flower is RW, and the genotype for the white flower is WW. This would lead to a 50 percent chance of the offspring having a phenotype of pink
Explanation:
N2+3H2=>>2NH3. If 6.72dm³ of each of Nitrogen and hydrogen (measured at S.T.P.) are made to produced Ammonium. Which of the reacted will be in excess and by how many moles?
Answer:
Hydrogen, 0,2 mol
Explanation:
[tex]V_{M}[/tex] = 22, 4 l/mol
V ([tex]N_{2}[/tex]) = 6,72 [tex]dm^{2}[/tex] = 6,72 l
V ([tex]H_{2}[/tex]) = 6,72 [tex]dm^{2}[/tex] = 6,72 l
The formula is:
n = [tex]\frac{V}{V_{M} }[/tex]
n ([tex]N_{2}[/tex]) = 6,72l /22,4 l/mol = 0,3 mol
n ([tex]H_{2}[/tex]) = 6,72l /22,4 l/mol = 0,3 mol (the same)
But from the equation we get a proportion that 1 mol ([tex]N_{2}[/tex]) - 3 mol ([tex]H_{2}[/tex])
[tex]\frac{0,3}{1} > \frac{0,3}{3}[/tex] (we have more hydrogen than is need for the reaction)
So there is excess of [tex]H_{2}[/tex]
We only need [tex]\frac{0,3}{3}[/tex] = 0,1 mol ([tex]H_{2}[/tex])
0,3 mol (hydrogen quantity we have) - 0,1 mol (hydrogen quantity we need for the reaction) = 0,2 mol (excess)
make me the brainliest
Which group of elements can act as semiconductors?
Answer:
metalloids
Explanation:
I think that is the answer
According to the electronic configuration, group 14 of elements can act as semiconductors.
What is electronic configuration?
Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.
Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.
Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.
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Elements that easily gain (steal) electrons tend to have-
O high ionization energy and more than 4 valence electrons
O low ionizations energy and less than 4 valence electrons
O high ionization energy and less than 4 valence electrons
O low ionization energy and more than 4 valence electrons
Answer:
O low ionization energy and more than 4 valence electrons
Explanation:
please Mark as BRAINLIST answer
Elements that easily gain (steal) electrons tend to have low ionization energy and more than 4 valence electrons. Therefore, the correct option is option D.
What is element?The quantity of protons an element has defines it. An element's atoms all contain the same amount of protons, but its electron and neutron counts might vary. Ions are produced by altering the electron to proton ratio, whereas isotopes are produced by altering the neutron count.
118 known elements are present. A study is being done to create element 120.1. The periodic table will have to modified to include element 120 after it has been created and validated. Elements that easily gain (steal) electrons tend to have low ionization energy and more than 4 valence electrons.
Therefore, the correct option is option D.
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What role does blood play before cellular respiration can occur?
Blood releases energy from very small molecules.
Blood carries energy from the cytoplasm to a mitochondrion.
Blood delivers oxygen and glucose to cells.
Blood delivers carbon dioxide and water to cells.
Answer:
B) Blood carries energy from cytoplasm to a mitochondrion
Hope this could help!
Explanation:
Answer:
C.
Explanation:
Blood provides your body with oxygen and glucose, which provides cellular respiration with the needed nutrients.
Which one of these best describes an adaptation?
Answer:
c
Explanation:
Answer:
C
Explanation:
If not C it is D
which sphere includes all the plants and animals on earth?? A. Lithosphere B.Type of soil C.Biosphere D.Asthenosphere
Answer:
Biosphere
Explanation:
It is B i think
What is the percent composition by mass of oxygen in
magnesium oxide, MgO?
(Molar mass of MgO = 40.3 g/mol)
%
Your answer should be rounded to three significant figures. Do not include units
In your answer.
What is the percent composition by mass of oxygen in magnesium oxide, MgO?
Answer: 39.7 percent
The percent composition by mass of oxygen in MgO is 65.84.
What is mass?The mass of a thing is a measurement of how much matter it contains.
What is percent composition?Percent composition is the way through which percentage of elements can be determine very easily. Formula:
O% = [tex]M_{A}M_{T}[/tex] ×100
Calculation of percent composition .
For MgO , the mass of oxygen atom is 16.3 and mass of Mg atom is 24.3.
By adding mass of oxygen and Mg total mass will be 40.3.
Now, put the value of given data in above equation:
O% = [tex]M_{A}M_{T}[/tex]×100O%
= 16./24.3×100.
O% = 65.84.
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Giving brainliest for correct answer!
Please help urgent Balance the following word equation:
Aluminum chloride +
Sodium -->
Aluminum +
Sodium Chloride
Coefficents must stay in the order shown above.
Answer:
AlCl3 + 3Na > Al + 3NaCl
Explanation:
AlCl3+Na → Al + NaCl
Al =1 Al=1
Cl =3 Cl = 1
Na=1. Na = 1
so balance
and it would be
Alcl3 + 3Na → Al + 3NaCl
Using the same sample of gas (P = 475 torr , T = 21 °C ), we wish to change the pressure
to 4750 torr with no accompanying change in volume or amount of gas. What temperature T2 in
Celsius, is needed to reach this pressure?
Answer:
210°C
Explanation:
using the equation
P1/T1=P2/T2
475/21=4750/T2
T2= (21×4750)/475
T= 210°C
Which of the following has the same empirical and molecular formula?
O P3N5
O C4H8
O C5H1005
Answer:
O C4H8
Explanation:
A beaker with 150 ml of water is placed on a hot plate. The beginning temperature is 22 oC. After 5 minutes the temperature is 87 oC. What is the amount of thermal (heat)energy absorbed by the water. 150 ml = 150 grams specific heat of water = 4.184 J/goC. show work plzzz
The amount of thermal energy absorbed by the water : Q = 40,794 J
Further explanationGiven
150 ml water
Temperature = 22 °C to 87 °C
specific heat of water = 4.184 J/g°C
Required
Heat absorbed
Solution
Heat can be formulated :
Q = m.c.Δt
Q = 150 g x 4.184 J/g°C x (87-22)
Q = 40,794 J
Please help me
How many hydrogen(H) atoms are in 3(NH₄)₂Cr₂O₇
And How many Nitrogen(N) atoms are in 3(NH₄)₂Cr₂O₇
Answer:
24 H
6 N
Explanation:
3 × (4 × 2) = 24 H
3 × 2 = 6 N
Which of the following pairs of elements would form an ionic compound?
phosphorous/bromine
potassium/sulfur
nitrogen/iodine
oxygen/fluorine
Answer:
Explanation:
Ionic compound : These are the compounds in which the atoms are bonded through the ionic bond. The ionic bond are formed by the complete transfer of the electrons.
That means, the atom which looses the electron is considered as an electropositive atom and the atom which gains the electron is considered as an electronegative atom.
And these bonds are formed between one metal and one non-metal.
From the given pairs of elements, potassium and sulfur, magnesium and chlorine are form ionic compound because potassium and magnesium are the metals and sulfur and chlorine are the non-metals. So, they can easily form ionic compound by the complete transfer of electrons.
While the other pairs, sodium and potassium are the metals, nitrogen and iodine, chlorine and bromine, helium and oxygen are the non-metals. They do not form ionic bond.
why plastic containers are prefered for storing food
Answer:
Plastic is non-reactive. It does not react with water and air. Plastic is light, strong and durable and can be moulded into different shapes and sizes. It is cheaper than metals. Plastics are poor conductors of heat and electricity and can be used for making handles of frying pans.
An atom that has one or two valence electrons is most likely to be - Nonreactive only
A) with nonmetals
B) Reactive with metals
C) Highly reactive
D) nonreactive
Answer:
C) Highly reactive
Explanation:
An atom with one or two valence electrons more than a closed shell is highly reactive, because the extra valence electrons are easily removed to form a positive ion
According to the electronic configuration, an atom that has one or two valence electrons is most likely to be highly reactive as it can easily loose 1 or 2 electrons.
What is electronic configuration?Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.
Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.
Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.
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I need help on thiss
The reaction is not balanced
Further explanationGiven
Reaction
2Fe(s)+3O₂(g)⇒2Fe₂O₃(s)
Required
The number of atoms
Solution
In a balanced chemical equation, the number of atoms in the compound that reacts (the reactants and products) will have the same number
Reactants : Fe(s)+O₂(g)
Fe = 2 atoms
O = 3 x 2 = 6 atoms
Products : Fe₂O₃(s)
Fe = 2 x 2 = 4 atoms
O = 2 x 3 = 6 atoms
The reaction is not balanced because the number of Fe atoms is not the same
The balanced reaction should be:
4Fe(s)+3O₂(g)⇒2Fe₂O₃(s)