Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, there are 8.41×10⁻¹⁸moles of oxygen in 5.07x10⁶atoms of oxygen.
What is mole?The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity of amount of substance.
Given number of atoms= 5.07x10⁶atoms
we know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.
mole =given number of atoms ÷ 6.022×10²³(Avogadro number)
Substituting the values
mole of oxygen=5.07x10⁶÷ 6.022×10²³
mole of oxygen =8.41×10⁻¹⁸
Therefore, there are 8.41×10⁻¹⁸moles of oxygen in 5.07x10⁶atoms of oxygen.
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Knowing what you know about photosynthesis, explain how the process may help reduce global warming.
Photosynthesis may help reduce global warming because the carbon dioxide is consumed during the process.
How photosynthesis may help reduce global warmingGlobal warming has to do with an increase in the average global temperature brought about by the increase in the concentration of greenhouse gases in the atmosphere.
The greenhouse gases form a layer that traps reflected solar radiation in the atmosphere. They prevent these radiations from returning back to space and consequently, the temperature of the planet keeps increasing. The more the concentration of these gases in the atmosphere, the more the warming increases.
Carbon dioxide gas represents a major component of greenhouse gases and has been the main culprit in global warming.
During photosynthesis, carbon dioxide is utilized by green plants to make carbohydrates. Thus, photosynthesis remains a major way through which the concentration of carbon dioxide in the atmosphere can be reduced and consequently reduce global warming.
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Which one is a spontaneous reaction?
Pd(s) + Be2+(aq) → Be(s) + Pd2+(aq)
3Sn(s) + 2Ga3+(aq) → 2Ga(s) + 3Sn2+(aq)
Be(s) + Sn2+(aq) → Sn(s) + Be2+(aq)
3Pd(s) +2Ga3+(aq) → 2Ga(s) + 3Pd2+(aq)
The spontaneous reaction among the given reactions is :
Be(s) + Sn²⁺ (aq) ---> Sn(s) + Be²⁺ (aq); option CWhat are spontaneous reactions?Spontaneous reactions are reactions that can proceed on their own without the addition of energy from an external source.
The free energy change of spontaneous reactions must be less than zero.
This implies that the energy change in a spontaneous reaction favors the formation of products and the reaction will proceed to product formation without an external source of energy supply.
Considering the given reactions:
The reaction that will be spontaneous is one that favors product formation.
Berylium is more reactive than Tin, hence, the reation below is spontaneous.
Be(s) + Sn²⁺ (aq) ---> Sn(s) + Be²⁺ (aq)
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Hello, Please help asap. Due in like 10-20 mins. I would greatly appreciate it (INCLUDES PICTURE DOWN BELOW)
In the given diagram of photosynthesis:
1. Carbon dioxide CO₂
2. Glucose C₆H₁₂O₆
3. ATP
What is Photosynthesis?Photosynthesis can be described as a process by which phototrophs convert light into chemical energy. This chemical energy is stored in the form of sugars, which are generated from water and carbon dioxide.
Photosynthesis reaction involves carbon dioxide and water which yield two products oxygen and glucose. Therefore, the photosynthesis reaction is said to be an endothermic reaction.
[tex]6CO_2 + 6H_2O \longrightarrow C_6H_{12}O_6 + 6O_2[/tex]
Photosynthesis takes place when plants use light energy to transform carbon dioxide gas and water into glucose and oxygen gas. Each chloroplast in plants contains a green-colored pigment known as chlorophyll. Sunlight is absorbed by chlorophyll whereas carbon dioxide and oxygen enter via the tiny pores of the stomata of leaves.
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The compound below can be prepared with an alkyl iodide and a suitable nucleophile. Identify the alkyl iodide and the nucleophile that you would use. For an anionic nucleophile, you do not need to draw the counterion.
The compound below can be prepared with an alkyl iodide and a suitable nucleophile. Identify the alkyl iodide and the nucleophile that you would use. For an anionic nucleophile, you do not need to draw the counterion.
Alcohol iodide nucleophile Is identified as the alkyl iodide and the nucleophile that would be used.
What is nucleophile?Nucleophile is defined as a chemical species that provides an electron pair to create a chemical bond in response to an action. A nucleophile typically has one electron pair and is negatively charged or neutral.
Alcohols with alkyl halides of hydrogen. Alcohols often undergo a nucleophilic substitution reaction to produce an alkyl halide and water when exposed to HBr or HCl. Alkanes and alcohols can be converted into alkyl halides through a nucleophilic substitution process.
Thus, alcohol iodide nucleophile Is identified as the alkyl iodide and the nucleophile that would be used.
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Distillation is a technique in which substances are separated based on their what
Answer:
It is based on the boiling point or volatility of its components.
Explanation:
because Distillation separates liquid from solid.
As astronauts take off in a rocket moving away from earth how does their mass and or weight change
Answer:
As you travel away from the Earth's surface, your mass stays the same but your weight reduces as gravitational pull decreases. For example, an astronaut orbiting the Earth and floating weightlessly in the cabin still has the same mass.
Explanation:
Part A: Identify the oldest rock layer shown in the diagram. Be sure to explain your reasoning.
Part B: Scientists think that the trilobite fossil found only in layer d became extinct soon after layer d was formed. Using evidence from the cross-section, explain why this statement is true or not.
Answer: none
Explanation:none
whoever responds first will get brainliest :) Reactions must be balanced because of the conservation of matter, which means all of these EXCEPT which one (Which is WRONG about balancing)?
A. Atoms cannot be destroyed
B. New elements, but not new substances can form New substances
C. New substances, but not new elements can form
D.Atoms cannot be created
How are latitude similar in their effects on climate
Please help me asap
Answer:
varying altitude and latitude create unequal heating of Earth's atmosphere
Explanation:
the higher you are, the colder it is(most of the time)
and latitude determines how close you are to the poles, the closer the cooler
There are a number of factors that alter the bioavailability of minerals from foods. Complete each sentence with either increases or decreases.
decreases increases
Phytic acid ______ the absorption of zinc from grains.
Oxalic acid _____ the absorption of calcium from spinach.
Refinement of grains _____ the mineral content of grain products.
Vitamin C _____ the absorption of iron from foods.
Vitamin D ____ the absorption of calcium from foods.
Each sentence about the bioavailability of minerals in foods should be completed with either increases or decreases as follows:
Phytic acid decreases the absorption of zinc from grains.Oxalic acid decreases the absorption of calcium from spinach.Refinement of grains decreases the mineral content of grain products.Vitamin C increases the absorption of iron from foods.Vitamin D increases the absorption of calcium from foods.What are nutrients?Nutrients can be defined as the chemical compounds (substances) or minerals that are present in food, and they are needed by the body of a living organism for healthy growth, reproduction, development, proper functioning, and reproduction.
What are the classes of nutrients?In Science, there are five (5) main classes of nutrients and these include the following:
ProteinFatCarbohydrateVitaminsMineralsIn conclusion, phytic acid, oxalic acid, and refinement of grains are factors that decrease the bioavailability of minerals in foods while Vitamin C and Vitamin D increases the bioavailability of minerals in foods.
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A package of M&M's was placed in a Calorimeter that had 200.0g of water at 35.00°C. The sample was then ignited to release its energy. The
temperature of the water increased to 550.0°C. Calculate the number of food Calories (Cal) that are in the package of M&M's. Round your Calories
according to sig fig rules
Here the substance is water. So, we need to know the value of specific heat capacity of water to solve this question.
The specific heat capacity of water is 4.18 J/g° C.
This is the heat required to increase the temperature by one degree Celsius. To increase the temperature by 20 degree C, the heat required will be 2 times of 4.18 J/g° C.
The heat required to raise the temperature of n grams of a substance by m0C will be,
Let us rewrite the equation as,
q = mc Δ t
Where q is the heat required, m is the mass of the substance, c is the specific heat capacity of the substance and Δ t is the temperature difference.
Given that,
m = 200g
Δ t = 55° C – 35° C = 20° C
c = 4.18 J/g° C
Let us substitute the values:
q = 200*4.18*20
Hence the heat required is 16720J.
Converting it to kJ, the heat required to raise the temperature of 200 grams of water from 55° C to 35° C is 167 KJ.
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The number of food Calories (Cal) that are in the package of M&M's are
431000 Joules.
When we measure the temperature change of the calorimeter, we may use this equation to compute the heat released by a sample because the calorimeter is an instrument for which we are aware of (or can ascertain) its heat capacity.
When a liquid absorbs or loses energy, the temperature of the liquid varies.
In accordance with the formula
Q= mCΔT
m = 200g
ΔT = 550 - 35
ΔT = 515
C = 4.182 J/kg °C
Q is equal to 200 * 4182 * 515
Q = 430746 Joules.
Water has a 4,200 J/kg°C (joules per kilogram per degree Celsius) specific heat capacity. This indicates that 4,200 J are required to increase the temperature of 1 kilogram of water by 1°C.
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Which of the following is a reasonable electron configuration?
O1s²1p5
O1s²2s²2p8
O1s²2s²2d4
O1s²2s²2p6
Answer:
Explanation:The electronic configuration of Oxygen is 1 s 2 2 s 2 2 p 4 .
1s²2s²2p⁶ is a reasonable electron configuration. Therefore, the correct option is option D.
What is electron configuration?The arrangement of an atom's or molecule's (or other physical structure's) electrons in their atomic or molecular orbitals is known as the electron configuration in atomic physics or quantum chemistry. For instance, the neon atom's electron configuration is 1s2 2s2 2p6, which means that 1, 2 and 6 electrons, respectively, are present in each of the 1s, 2s, and 2p subshells.
According to electronic configurations, each electron moves individually within an orbital while being surrounded by an average field produced by all other orbitals. Slater determinants and configuration state functions are used to mathematically describe configurations. 1s²2s²2p⁶ is a reasonable electron configuration.
Therefore, the correct option is option D.
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how many atoms in 0.034 moles of titanium
Answer:
[tex] \huge{ \boxed{2.0468 \times {10}^{22} \: \text{atoms} }}[/tex]
Explanation:
To find the number of entities in a given substance we use the formula
[tex] \bold{N = n \times L} [/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question
n = 0.034 moles
N = 0.034 × 6.02 × 10²³ = 2.0468 × 10²²
We have the final answer as
[tex] \bold{2.0468 \times {10}^{22} \: \text{atoms}}[/tex]
What is the molar mass of an unknown gas with a density of 14.1 g/L at 4.00 atm and 35.0 °C?
89.08 g/mol is the molar mass of an unknown gas with a density of 14.1 g/L at 4.00 atm and 35.0 °C.
We know that
PV=nRT.
where,
P = Pressure of the gas
V = Volume of the gas
n = Mole
Mole = Given mass/Molar mass
= m /Mw
R = Real gas constant = .08205 L atm/mole k
T = temperature
Now,
PV = mRT/Mw
Mw= mRT/PV. ( m/V=density)
Mw = dRT/P
Mw = 14.1 g/L × 0.08205 × 308/4
Mw = 89.08 g/mol
Hence we can say that Molar mass is 89.08 g/mol.
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This compound ( 2,3-dimethyl-2-heptene ) is symmetric or asymmetric
Answer:
symmetric
Explanation:
The compound 2,3-dimethyl-2-heptene is symmetric. A compound is symmetric if it has an identical molecular structure on both sides of its central axis. In the case of 2,3-dimethyl-2-heptene, the molecule has a central carbon atom with two methyl groups attached to it, one on the 2nd position and one on the 3rd position. Because the groups attached to the central carbon atom are identical, the molecule is symmetric.
In contrast, an asymmetric compound has a molecular structure that is different on each side of its central axis. For example, a compound with a central carbon atom attached to two different groups, such as a methyl group and a hydrogen atom, would be asymmetric.
This hydrocarbon is incomplete. Draw the hydrogen atoms and the bonds connecting them to carbon atoms such that each carbon atom has four bonds. Then record the number of hydrogen atoms you drew using a text box.
Explanation:
no. of H atoms is 12..
no of C atoms is 5....
all the C atoms are sharing a bond with each other and so are H atoms...
The combustion of propane may be described by the chemical equation C₂H₂(g) +50,( 3 CO₂(g) + 4H₂O(g) How many grams of O₂(g) are needed to completely burn 20.9 g T, H, (g)? mass O₂: go2
so basically maybe you should
A container of CH at 2.00 atm of pressure has a small pinhole, through which the CH effuses at a rate of 2.55 mL/min. What will be the rate of effusion of CO at 2.00 atm in the same container?
The rate of effusion of CO at 2.00 atm in the same container would be 1.74 mL/min.
Rate of effusion of gasesAccording to Graham's law of effusion of gases, at constant pressure, the rate of effusion of gases is inversely proportional to the square root of their molar masses.
Graham's law of effusion of gases can be mathematically represented as:
[tex]r_1/r_2[/tex] = [tex]\sqrt\frac{Mm_2}{Mm_1}[/tex]
Where [tex]r_1[/tex] and [tex]r_2[/tex] are effusion rates of gas 1 and gas 2, and [tex]Mm_1[/tex] and [tex]Mm_2[/tex] are their molar masses respectively.
In this case:
Gas 1 = CH
Molar mass of CH = 12 + 1 = 13 g/mol
[tex]r_1[/tex] = 2.55
Gas 2 = CO
Molar mass = 12 + 16 = 28 g/mol
[tex]r_2[/tex] = ?
Making [tex]r_2[/tex] the subject of the formula and substituting the values into the equation:
2.55/[tex]r_2[/tex] = [tex]\sqrt\frac{28}{13}[/tex]
2.55/[tex]r_2[/tex] = 1.4676
[tex]r_2[/tex] = 2.55/1.4676
= 1.74 mL/min
In other words, the rate of effusion of CO at 2.00 atm in the same container would be 1.74 mL/min.
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How many moles of nitrogen gas would be produced if 7.75 moles of copper(I) oxide were reacted with excess ammonia in the following chemical reaction? 2 NHs (g) + 3 CuO (s) > 3 Cu(s) + Na(g) + 3 H20 (g)
Answer:
Explanation:
Dimensional analysis, using mole ratio from the balanced reaction: (7.63 mole CuO) * (1 mole N2 /3 mole CuO) = 2.54 mole N2
Please HELP ASAP
Carbon dioxide gas, CO2, effuses at a rate that is 1.087 times the effusion rate of a second gas. One molecule of this second gas contains one atom of nitrogen and two other atoms that are identical. What element are these other atoms?
Ideal gas law is valid only for ideal gas not for vanderwaal gas. To solve such, we need to know the relation between rate of effusion and molar mass of gases. Therefore, the molar mass of unknown gas is 53.6g/mol.
What is ideal gas equation?Ideal gas equation is the mathematical expression that relates pressure volume and temperature.
Mathematically the relation between rate of effusion of gases and their molar masses can be given as:
rate of effusion of unknown gas/rate of effusion of carbon dioxide gas=√molar mass of carbon dioxide/molar mass of particular gas
rate of effusion of carbon dioxide=1.087 ×rate of effusion of unknown gas
Substituting all the given values we get
rate of effusion of unknown gas÷ 1.087 ×rate of effusion of unknown gas=√44 g/mol÷ molar mass of unknown gas
1÷ 1.087=√44 g/mol÷ molar mass of unknown gas
squaring both side
0.82=44 g/mol÷ molar mass of unknown gas
molar mass of unknown gas= 53.6g/mol
Therefore, the molar mass of unknown gas is 53.6g/mol
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Can there be a balance between lifestyle and green technology?
Sn2+(aq) + Cr2O7^2- (aq) + 14H+(aq) → 3Sn4+(aq) + 2Cr3+(aq) + 7H2O(l)
Volume = 6.64 mL
The moles of Cr2O7^2-(aq) that reacted, expressed in scientific notation, is a.bc x 10-dmol. The values of a, b, c and d are..?
The concentration of Sn2+(aq), expressed in scientific notation, is a.bc x 10-d mol/L. The values of a, b, c and d are..? (use previous recorded answer to answer this question)
The chemical reaction is fe2+ Pt(s) ∣ fe3+ (aq) ∣∣cr2O²-7(aq),cr+3(aq) ∣ Pt(s)
How to calculate chemical reaction ?Reaction where particular set of chemicals changes into another form without changing their nuclei just the transfer or sharing of electrons and formation and breaking of bonds is called as chemical reaction.
cr-2 7 (aq)+ 14H+(aq)+ 6fe2+(aq)⟶6fe+3(aq)+2cr+3 (aq)+7h2 O(l)
Here, cr+6 2 02-7 (aq) is reduced to cr+3 (aq)
& fe+2 (aq) is oxidized to fe+3 (aq)
Reducing takes place at cathode & oxidation takes place at anode.
The cell is represented by anode on the left hand side of electrolyte bridge & cathode on the right hand side of electrolyte bridge.
∴ It can be represented as :
Pt(s) ∣ fe 3 + (aq)fe2+ (aq) ∣∣ cr2 o2- 7(aq),cr+3 (aq) ∣ Pt(s)
The complete question is : The cell reaction cr2 O2(aq)+14H+aq)+ 6fe2+(aq)→ 6fe3+(aq)+ (aq)+7H2 O(l), is best represented by:
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Part 1: Name the type of chemical reaction that occurs when magnesium chloride solution (MgCl2) reacts with sodium carbonate solution (Na2CO3).
Part 2: Explain why aluminum (Al) would react with copper chloride (CuCl2) but not with magnesium chloride (MgCl2).
1. The name of the reaction is double displacement reaction
2. Aluminum (Al) will react with CuCl₂ but not with MgCl₂ because Mg is higher than Al in the electrochemical series
1. How do I know the type of reaction occurring?
To know the type of reaction occurring, we shall write the balanced equation for the reaction. Details below:
MgCl₂ + Na₂CO₃ -> 2NaCl + MgCO₃
From the balanced equation above, we can see clearly that there is an exchange of ions as Na and Mg exchanges and likes Cl₂ and CO₃.
Thus, we can conclude that the reaction is a double displacement reaction
2. Why will Al react with CuCl₂ but not with MgCl₂?
The reactivity of metals is controlled by their position in the electrochemical series.
Metals higher in the electrochemical series are more reactive and will displace the less reactive metals from solution.
The attached photo shows the electrochemical series of metals.
We can see that magnesium, Mg is higher than aluminum, Al in the electrochemical series and as such, Al can not displace Mg from solution.
Thus, we can conclude that Al can not react with MgCl₂ since Mg is higher than Al in electrochemical series.
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In this chemical equation below 2 Mg + HCI are called the ?
2 Mg + HCI —> MgCl2 + H2
In this chemical equation below 2Mg + HCI are called the reactants. Therefore, option (4) is correct.
What is the chemical equation?A chemical equation can be defined as a representation of a chemical reaction with help of chemical symbols, and molecular formulae of the substances. A chemical equation exhibits reactants participating, formed products in the reaction, and an arrow shows the direction of the chemical reaction.
The chemical equation in which the number of atoms of each element on either side of the equation should be equal is called a balanced chemical equation.
A chemical equation obeys the law of conservation of mass. By obeying this law, in a balanced chemical equation, the total mass on the reactant side must be equal to total mass on the product side.
In the given chemical equation, Mg and HCl are reactants and MgCl₂and H₂ are products.
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8. Interestingly, the 1s orbital in the chlorine atom encloses more volume of space than the 1s orbital in an argon atom. Explain.
Answer: Chorine's atomic radius in larger than that of Argon.
Explanation: Thinking in terms of atomic radius, as you move from left to right on the periodic table, atomic radius decreases. However, as you move from top to bottom on the periodic table, the atomic radius increases. This is because when you are moving from top to bottom on the periodic table, more orbitals are added. When you move from left to right, the number of orbitals remains the same but the number of protons in the nucleus is still increasing. They have a stronger hold on the electrons and pull them closer. This also makes it harder for outside photons to remove an electron from an atom (ionization energy) as you move from left to right on the periodic table.
Now let's think about chlorine and argon. They are right next to each other in the upper right-hand corner of the periodic table. However, chlorine does come first and if we think back to the atomic radius, it gets smaller as you move from left to right. Chlorine comes before Argon when looking left to right.
In conclusion, chorine's atomic radius is larger than that of argon.
If others adopted similar habits, how might the world of science change?
Answer:
Explanation:
Smoking a cigarette, snorting cocaine, or drinking yourself into oblivion are all easy habits to adopt because they light up your brain with the neurotransmitter …
why does enzymatic reduction result in a chiral product in a comparative reduction reaction?
The chirality of the enzyme ensures that a chiral product is obtained.
Why is the product chiral?The term chirality could be simplified to mean "handedness". This idea comes from the fact that a compound could be handed. The handed of aa molecule has to do with the direction to which it rotates plane polarized. As such a compound could be left handed or right handed.
Now, we are told that the product of the enzyme is chiral. This is because the enzyme is also chiral and its shape can only lock into the particular chiral reactant and this is what does give rise to the chiral product.
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Omar wants to determine if the mass of a model rocket affects how long the rocket is able to stay up in the air. To do this, he constructs three identical rockets and then fills two of the rockets with varying amounts of sand to add mass. He then launches the rockets one at a time and times how long they are able to stay airborne.
What is the test variable (independent variable) in Omar's experiment?
A.
the materials out of which the rockets were made
B.
the time the rockets remain airborne
C.
the force with which each rocket is launched
D.
the masses of the model rockets
NEED HELP ASAP PLEASE AND TY
The synthesis of the ATP takes place in the organelle known as the mitochondrion. Therefore, option (A) is correct.
What is mitochondrion?Mitochondrion can be described as the membrane-bound organelles in the cytoplasm of all eukaryotic cells, that synthesize adenosine triphosphate (ATP), the main energy source used by the cell.
It is also known as the “Powerhouse of the cell,” Mitochondrion is found inside the cytoplasm and essentially functions as the cell’s digestive system.
Mitochondrion plays a major role in breaking down nutrients and producing energy-rich molecules for the cell. Many of the biochemical reactions in cellular respiration occur within the mitochondria.
The mitochondrion's structure can be described as a double-membraned, rod-shaped structure found in both animal cells and plants.
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An aqueous solution contains the amino acid glycine (NH2CH2COOH). Assuming the acid does not ionise in water, calculate the molality of the solution if it freezes at 21.1°C.
The molality of the solution is -11.34 m/kg. The number of moles of solute in a solution equal to 1 kg or 1000 g of solvent is referred to as its molality.
What is meant by molality?The number of moles of solute in a solution equal to 1 kg or 1000 g of solvent is referred to as its molality. The definition of molarity, on the other hand, is based on a certain volume of solution. Mol/kg is a typical molality measurement unit in chemistry.
While a solution's molarity is determined by the moles of solute divided by the volume of the solution in litres, a solution's molality is determined by the moles of solute divided by the mass of the solvent in kilogrammes.
Colligative property: freezing point depression.
ΔT = Kf. m
ΔT = T°fussion pure solvent - T° fussion solution
Kf = depression constant for water
0°C - (21.1°C) = 1.86 °C/m . m
-21.1°C = 1.86°C/m . m
-21.1°C / 1.86° m/°C = m → -11.34 m/kg
The molality of the solution is -11.34 m/kg
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