Answers
answer:
that is the chemical form of glucose.
Related Questions
Arrange the substances in order of the increasing volatility. H20 , NH3, HF. Explain the answer. Anyway what is volatility?
Answers
Answer:
volatility means liability to change rapidly and unpredictably, especially for the worse
When discussing atoms scientists use the total number of electrons as well as the number of valence electrons. What is the difference between these two terms? Why do you predict that the number of valence electrons are important to scientists?
Answers
Answer
The atomic number is the total number of electrons. The valence electrons are only those in the outer shell.
The number of valence electrons is important to scientists because they participate in the formation of a chemical bond
Explanation
The total number of electrons is equivalent to the atomic number of a neutral element. The total number of electrons must be equal to the total number of protons in the nucleus of a neutral element. The total number of electrons in an atom are classified into two namely; core electrons and valence electrons.
The core electrons are those occupying the innermost shell or lowest energy levels while the number of valence electrons is the electrons occupying the outermost shell or highest energy level of an atom.
The number of valence electrons is important to scientists because they participate in the formation of a chemical bond; in a single covalent bond, both atoms in the bond contribute one valence electron in order to form a shared pair. The presence of valence electrons can determine the element's chemical properties and whether it may bond with other elements: For the main group element, a valence electron can only be in the outermost electron shell.
2. If a solid dissolves in the liquid, sedimentation and decantation method cannot be used.Why?
Answers
Answer:
The answer is if a solid gets dissolved in a liquid then sedimentation and decantation cannot be used because these methods are used to separate an insoluble solid substance but if we add a little sugar or salt it will dissolve in the liquids it is soluble solid making it hard to separate.
Explanation:
I hope this helps
How much of a 24-gram sample of Radium-226 will remain unchanged at the end of three half-life periods?
Answers
Answer:
The right answer is "3 g".
Explanation:
Given:
Initial mass substance,
\(M_0=24 \ g\)
By using the relation between half lives and amount of substances will be:
⇒ \(M=\frac{M_0}{2^n}\)
\(=\frac{24}{2^3}\)
\(=3 \ g\)
Thus, the above is the correct answer.
Name the type of chemical reaction that occurs when aluminum (Al) reacts with copper nitrate (Cu(NO3)2).
Answers
The type of chemical reaction that occurs when aluminum (Al) reacts with copper nitrate Cu(NO₃)₂ is a single displacement reaction.
What are chemical reactions?Chemicals reactions are reactions that result in permanent changes in the properties of the substances that undergo the changes.
Some examples of chemical reactions are:
Synthesis reactions - these are reactions in which a single product is obtained from the combination of two or more substances.
Combustion reactions - these are reactions where oxygen combines with other elements to release large amounts of heat and light.
Single displacement reactions - these are reactions in which an element or radical replaces another element in a compound.
For example, the reaction of aluminum with Cu(NO₃)₂.
2 Al + 3 Cu(NO₃)₂ --> 3 Cu + 2 Al(NO₃)₃
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Please help, its due today! I'll also make you brainiest (put them in an order that's simple, look at the picture and you'll see what I mean) Thank you and God bless! <33
On beaches there are often areas of grassy dunes where people are prohibited from walking. How do these protected areas preserve ecosystem services? Use the graphic organizer to categorize the following as either examples of land reclamation of protecting biodiversity.
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Answer:
Preventing erosion – Land Reclamation
Protecting nesting areas – Protecting Biodiversity
Preventing littering – Land Reclamation
Preventing habitat disruption – Protecting Biodiversity
Protecting native species – Protecting Biodiversity
Preventing contamination of soil – Land Reclamation
Explanation:
I really hope I'm right! I tried my hardest, please give me brainliest :)
have a good day!
The fact that the ratio of helium to hydrogen in the Universe is so large (25%:75%) is evidence thatthe whole Universe was once as hot as the interior of a starnuclear fusion rates in stars were much higher in the pastthe expansion of the Universe is acceleratingthe age of the Universe is roughly 14 billion years
Answers
The evidence suggests that almost all of the universe's nuclear matter is composed of hydrogen and helium. Hydrogen, the most prevalent element, makes up 74% of the mass, and helium makes up 25%. Less than 1% of the total is made up of heavier elements.
The hot, dense conditions of the universe's creation led to the production of the low-mass elements hydrogen and helium. Nuclear reactions are used to explain a star's conception, development, and demise. These reactions produced the chemical components that make up the matter we can see in the universe.
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An atom with 14 protons, 14 neutrons, and 16 electrons is stable, -2 charge
stable, +2 charge
unstable, -2 charge
unstable, no charge *
Answers
We can see that an atom with 14 protons, 14 neutrons, and 16 electrons is unstable, and has a -2 charge.
So the correct option is the third one.
What can we say about the atom?An atom with 14 protons, 14 neutrons, and 16 electrons is not stable. The number of protons in an atom, also known as its atomic number, determines its element and its chemical properties. In this case, the atom has 14 protons, which corresponds to the element silicon (Si) on the periodic table.
For an atom to be stable, it should have a balanced number of protons and electrons. Electrons are negatively charged particles that orbit the nucleus of an atom in energy levels or electron shells. The number of electrons in a stable atom should be equal to the number of protons, resulting in a neutral charge overall.
In this case, the atom has 14 protons and 16 electrons, which means it has two more electrons than protons, resulting in a net charge of -2. This is an example of an ion.
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Which of the following is true according the the Arrhenius theory of acids?
A strong acid increases the OH-ion concentration in an aqueous solution.
A strong acid decreases the OH-ion concentration in an aqueous solution.
O A strong acid decreases the H+ and OH-ion concentration in an aqueous
solution.
A strong acid increases the H+ ion concentration in an aqueous solution.
Answers
For example
HCl———>H+ + Cl-
A sample of ammonia, NH3, has a mass of 78.25 g. Calculate the number of ammonia molecules in the sample.
number of molecules:
Answers
There are approximately \(2.76 * 10^{24\) ammonia molecules in the given sample.
To calculate the number of ammonia molecules in the sample, we need to use Avogadro's number and the molar mass of ammonia.
The molar mass of ammonia \((NH_3)\) can be calculated by adding up the atomic masses of nitrogen (N) and hydrogen (H):
Molar mass of \(NH_3\) = (1 x atomic mass of N) + (3 x atomic mass of H)
= (1 x 14.01 g/mol) + (3 x 1.01 g/mol)
= 14.01 g/mol + 3.03 g/mol
= 17.04 g/mol
Now, we can calculate the number of moles of ammonia in the sample using the formula:
Number of moles = Mass of the sample / Molar mass
Number of moles = 78.25 g / 17.04 g/mol
≈ 4.5865 mol (rounded to four decimal places)
Finally, we can use Avogadro's number, which represents the number of particles (atoms, molecules, etc.) in one mole of a substance. Avogadro's number is approximately \(6.022 * 10^{23\) particles/mol.
Number of ammonia molecules = Number of moles x Avogadro's number
Number of ammonia molecules ≈ 4.5865 mol x (\(6.022 * 10^{23\) molecules/mol)
≈ \(2.76 * 10^{24\) molecules (rounded to two significant figures)
Therefore, the provided sample contains roughly \(2.76 * 10^{24\) ammonia molecules.
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The number of ammonia molecules in the sample is approximately 2.764 x \(10^{24}\) molecules.
To calculate the number of ammonia molecules in a given sample, we need to use Avogadro's number and the molar mass of ammonia.
The molar mass of ammonia (NH3) is calculated as follows:
Molar mass of N = 14.01 g/mol
Molar mass of H = 1.01 g/mol
Total molar mass of NH3 = 14.01 g/mol + (3 * 1.01 g/mol) = 17.03 g/mol
Now, we can calculate the number of moles of ammonia in the sample:
Number of moles = Mass of sample / Molar mass of NH3
Number of moles = 78.25 g / 17.03 g/mol = 4.594 moles
Next, we use Avogadro's number, which states that there are 6.022 x \(10^{23}\) molecules in one mole of a substance.
Number of molecules = Number of moles * Avogadro's number
Number of molecules = 4.594 moles * 6.022 x \(10^{23}\) molecules/mol = 2.764 x \(10^{24}\) molecules
Therefore, there are approximately 2.764 x \(10^{24}\) ammonia molecules in the given sample of 78.25 g.
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Which factors play a role in creating ocean waves
Answers
Answer: wind speed, direction, duration, and fetch
Explanation: Ocean waves are usually produced by the wind that moves its energy to the water
How many formula units are 113.5 grams of Ca(OH)2
Answers
Answer:
Molecular Formula Ca(OH)2 or CaH2O2
Synonyms CALCIUM HYDROXIDE 1305-62-0 Slaked lime Hydrated lime Ca(OH)2
Molecular Weight 74.09 g/mol
Component Compounds CID 962 (Water) CID 5460341 (Calcium)
Explanation:
prop-1-yne + 2HBr/H2O2 = A;
A + 2H2O = B;
B + K2CO3(aq) = C;
C + heat = D;
D + HBr = E.
find the compounds A, B, C, D and E
Answers
Based on the given reactions, the compounds are as follows:
A: The specific product formed from the reaction between prop-1-yne and either 2HBr or H2O2.
B: The product formed when compound A reacts with 2H2O.
C: The product formed when compound B reacts with K2CO3(aq).
D: The product formed from the heat-induced reaction of compound C.
E: The product formed when compound D reacts with HBr.
Based on the given reactions, let's analyze the compounds involved:
Reaction 1: prop-1-yne + 2HBr/H2O2 = A
The reactant prop-1-yne reacts with either 2HBr or H2O2 to form compound A. The specific product formed will depend on the reaction conditions.
Reaction 2: A + 2H2O = B
Compound A reacts with 2H2O (water) to form compound B.
Reaction 3: B + K2CO3(aq) = C
Compound B reacts with K2CO3(aq) (potassium carbonate dissolved in water) to form compound C.
Reaction 4: C + heat = D
Compound C undergoes a heat-induced reaction to form compound D.
Reaction 5: D + HBr = E
Compound D reacts with HBr (hydrobromic acid) to form compound E.
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Which equation shows an increase in entropy?
Hint: Look at the states of matter, g s l, of the chemicals in each equation. A C2H4(g) + H2(g) + C2H6(g) в Caco3(9) + Cao(s) - CO2(g) c Fe(s) + S (s) -+ FeS (s)
Answers
The equation C2H4(g) + H2(g) + C2H6(g) → Caco3(s) + Cao(s) + CO2(g) shows an increase in entropy due to the formation of a gas as a product. Option A
In this equation, the reactants on the left-hand side consist of gases (C2H4 and H2), while the products on the right-hand side include a solid (Caco3) and a gas (CO2).
When a reaction involves a change from gaseous to solid or liquid states, there is typically a decrease in entropy because the particles become more ordered and constrained in the solid or liquid phase.
Conversely, when a reaction involves the formation of gases, there is generally an increase in entropy because gases have higher degrees of molecular motion and greater freedom of movement compared to solids or liquids.
In the given equation, the reactants include three gaseous compounds (C2H4, H2, and C2H6), and one of the products is a gas (CO2). Therefore, the overall entropy of the system increases during this reaction.
The equation Fe(s) + S(s) → FeS(s) does not show an increase in entropy. Both the reactants (Fe and S) and the product (FeS) are solids. Since solids have lower entropy compared to gases or liquids, the entropy of the system does not increase in this reaction. Option A
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pls help me in solve this question in chemistry
Answers
The chemical equation for the decomposition of water is:
\(2 H_2O -- > 2 H_2 + O_2\)
To balance this equation, we need to count the number of atoms of each element on both sides of the equation.
On the left side of the equation, we have:
2 hydrogen atoms (2 H₂O)
2 oxygen atoms (2 H₂O)
On the right side of the equation, we have:
2 hydrogen atoms (2 H₂)
2 oxygen atoms (1 O₂)
We can see that the number of hydrogen atoms is already balanced, but the number of oxygen atoms is not. To balance the equation, we need to add a coefficient in front of O2 so that we have the same number of oxygen atoms on both sides.
The balanced equation is:
\(2 H_2O -- > 2 H_2 + 1 O_2\)
A compound is broken down into simpler compounds during a decomposition reaction. Different techniques, such as heating, exposure to light, or the inclusion of a catalyst, can be used to produce this reaction.
The reactant component splits into two or more products, which may be elements or compounds, during decomposition. A synthesis reaction, in which less complex substances join to create a more complex compound, is the antithesis of this reaction.
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A peak elutes from an HPLC column 17.7 cm in length in 11.1 min. What would be the width at half‑height of the peak (in seconds) if the plate height were 8.68 μm?
Answers
Answer:
10.98 s
Explanation:
To solve this problem we first use the formula:
H = L/NWhere:
H = Plate height (8.68 μm, or 8.68x10⁻⁶m)L = Column length (17.7 cm, or 0.177 m)N = Number of theoretical plates (unknown)And solve for N:
N = 0.177 m / 8.68x10⁻⁶mN = 20392 platesThen we use the formula:
N = 5.54*\((\frac{t_r}{W_{0.5}})^2\)Where:
N is the number of theoretical plates previously calculated. tr is the retention time (11.1 min, or 666s)W₀.₅ Is the width at half-height (unknown)And solve for W₀.₅:
W₀.₅ = 10.98 sa. Identify the structures shown in the diagram. b. Identify the information that is contained within these structures. c. Describe how the structures from this cell would compare to the structures in the nucleus of another body cell from the same person. d. Explain why the structures are in pairs.
Answers
The answer responses to the structures shown in the diagram are:
A. chromosomes
C. They would be the same.
B. They are in pairs because each one comes from a different parent.
What is the structure about?The chromosomes are in pairs because humans have a diploid number of chromosomes, meaning they have two sets of chromosomes, one inherited from each parent.
The nucleus is important in eukaryotic cells and has many important parts that help the cell work properly. There are some parts inside cells called the nuclear membrane, nucleoplasm, nucleolus, and chromatin. Chromatin is made up of DNA and other proteins.
Every part of a person's body has the same genes, but the way they are organized can be different in different types of cells. The chromosomes in our skin cells might not be the same as the chromosomes in our muscle cells, even if they come from the same person.
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Identify the structures shown.
A. chromosomes
B. mitochondria
C. nuclei
D. vacuoles
C
Describe how the structures from this cell would compare to the structures in the nucleus of another body cell from the same person.
A. There would be longer.
B. They would be shorter.
C. They would be the same.
D. They would be different.
Describe how the structures from this cell would compare to the structures in the nucleus of another body cell from the same person.
A. There would be longer.
B. They would be shorter.
C. They would be the same.
D. They would be different.
Explain why the structures are in pairs.
A. They aren't in pairs.
B. They are in pairs because each one comes from a different parent.
C. This cell is making a copy of itself.
D. The cell always has 2 copies in case 1 is damaged.
Explain how Florida droughts lead to water restriction
Answers
Answer:
Due to drought in Florida, people were informed to minimize the use of water and certain rules were made regarding water usage.
Explanation:
A drought is a shortage in the water supply. The drought in Florida led to water restriction as it was a way to prevent the shortage of water in the long run. Florida experienced a drought and water restriction was used as a way to curtail further shortage of water.
New rules were made to prevent wastage of water such as limiting lawn watering to one day in a week, limiting of car washing, and homeowners were not allowed to do things that can lead to an increase in water usage.
Which statements about kinetic and potential energy are correct?
Multiple select question.
The kinetic energy of a substance is proportional to temperature.
The potential energy of a substance depends on its composition.
The potential energy of a substance depends in part on the constant random motion of its representative particles.
Chemical systems contain both kinetic energy and potential energy.
Multiple choice
Answers
Answer:
These three are correct:
The kinetic energy of a substance is proportional to temperature.
The potential energy of a substance depends on its composition.
Chemical systems contain both kinetic energy and potential energy.
Explanation:
According to the passage, which of the following is an example of a simple machine that makes our work easier?
A
a lawnmower used to cut the grass
B
a laptop computer that fits easily in a backpack
C
a pulley that lifts an elevator off the ground
D
a remote control for the television
Answers
Answer:
C, A pulley that lifts an elevator off the ground
Explanation:
Basically, it's just easier than a human doing it because that would probably be too much work for humans.
Answer:
C
Explanation:
If Na was to form a 2 ion, from what orbital subshell would the second electron be lost?
Answers
Answer:
2p
Explanation:
Sodium has an atomic number of 11, thus, the neutral atom has 11 electrons. The electron configuration is:
Na: 1s² 2s² 2p⁶ 3s¹
To gain stability, it loses an electron from its outer shell to form the cation Na⁺. Its electron configuration is:
Na⁺: 1s² 2s² 2p⁶
If it were to lose a second electron to form a Na²⁺ cation, the electron should be lost from the 2p orbital subshell and its electron configuration would be:
Na²⁺: 1s² 2s² 2p⁵
What are the properties of the aluminum in the can? Check all that apply
Answers
Answer: If you are looking for the number its 13.
Explanation:
if you can show your question for better understanding
7.5 L of a gas at 2 ATM and a temperature of 75°C is changed and volume to 3.4 L and a pressure of .5 ATM what is the new temperature
Answers
Answer:
Explanation:
Combined Gas Law
T2= T1P2V2/ (P1V1) = 348.15 X .5 X 3.4/(2 X 7.5) =39.46 K or -233.69C
Question 1 of 10
Which of the following is an example of a phase change from solid to liquid?
A. Water evaporating
B. Water condensing
O
C. Water freezing
D. Ice melting
SUBMIT
Answers
Answer:
C. water freezing
Explanation:
Be sure to answer all parts. One gallon of gasoline in an automobiles engine produces on average 9.50 kg of carbon dioxide, which is a greenhouse gas; that is, it promotes the warming of Earth's atmosphere. Calculate the annual production of carbon dioxide in kilograms if there are exactly 40.0 million cars in the United States and each car covers a distance of 7930 mi at a consumption rate of 23.6 miles per gallon. Enter your answer in scientific notation.
Answers
Answer:
The answer is below
Explanation:
one gallon of gasoline produces 9.50 kg of carbon.
The total number of cars = 40 million
Distance covered by each car = 7930 miles
Consumption rate of the cars per miles traveled is 23.6 miles per gallon.
Hence the annual gasoline consumption by all the cars in the United States of America = (total number of cars × Distance covered by each car) ÷ Consumption rate of the cars per miles
annual gasoline consumption by all the cars = (40000000 × 7930 miles) ÷ 23.6 miles/gallon = `1.344067797 × 10¹⁰ gallons
1.344067797 × 10¹⁰ gallons = \(1.344067797*10^{10}\ gallons *\frac{9.50\ kg}{1\ gallon} =1.276864407*10^{11}\ kg\ of \ carbon\ dioxide\)
25 g of a chemical is dissolved in 75 g of water. What is the percent by mass concentration of this chemical
Answers
Answer:
300
Explanation:
plss help me with this I don't even know where to start to solve it
Answers
From the balanced equation of the reaction, the coefficients of the reactants and products are 1:2:1.
What is a balanced equation of a chemical reaction?A balanced equation of a chemical reaction is an equation which balances the atoms of each element on the reactants as well as the products side of a chemical reaction.
The balanced equation of the reaction that occurs when magnesium bromide is heated is shown below:
\(MgBr_2 \rightarrow Br_2+Mg \)
Therefore, the coefficients of the reactants and products are 1:2:1.
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The irreversible isomerization A
B was carried out in a batch reactor and the following concentration time data were obtained:
Time vs Concentration data in a Batch reactor
t 0 3 5 8 10 12 15 7.5
mol/h 4 2.89 2.25 1.45 1.0 0.65 0.25 0.07
Determine the reaction order,
, and the specific reaction a rate constant, k, using any method of your choice.
Answers
The reaction order and specific reaction rate constant can be determined by performing the kinetics experiment on irreversible polymerization A. Kinetic experiments can be used to investigate the rate and mechanism of chemical reactions. Chemical kinetics is the study of chemical reactions' speed and pathway.
The term "kinetics" refers to the study of reaction rates, which are determined by measuring the concentration of reactants and products as a function of time.Kinetics experiments can be used to determine the reaction rate and order of reaction. A chemical reaction's rate is defined as the change in the concentration of a reactant or product per unit time. The order of a reaction refers to the number of molecules that must react to produce a product. The order of reaction can be determined by measuring the initial rate of the reaction as a function of concentration.Methods for determining the reaction rate order include the initial rate method, the half-life method, and the integrated rate method. The initial rate method determines the reaction order by measuring the initial rate of the reaction at different reactant concentrations. The half-life method determines the reaction order by measuring the time it takes for the reactant concentration to decrease by half.The integrated rate method determines the reaction order by measuring the concentration of the reactant or product at different times.The specific rate constant can be determined by using the Arrhenius equation, which relates the rate constant to the activation energy, temperature, and frequency factor. The frequency factor can be determined by measuring the rate constant at different temperatures.For such more question on polymerization
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How many molecules of ethane (C2H6) are present in 0.334 g of C2H6?
Answers
Answer:
6.6253*10²¹molecules of ethane (C₂H₆) are present in 0.334 g of C₂H₆
Explanation:
Avogadro's Number is the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of that substance. Its value is 6.023 * 10²³ particles per mole. Avogadro's number applies to any substance.
In this case, being:
C: 12 g/moleH: 1 g/molethe molar mass of ethane C₂H₆ is:
C₂H₆: 2*12 g/mole + 6* 1 g/mole= 30 g/mole
Then you can apply the following rule of three: if 30 grams of C₂H₆ are present in 1 mole, 0.334 grams of C₂H₆ in how many moles are present?
\(moles of C_{2} H_{6} =\frac{0.334 grams*1 mole}{30 grams}\)
moles of C₂H₆=0.011
Finally, taking into account the definition of Avogadro's number, you can apply the following rule of three: if there are 6.023 * 10²³ molecules of C₂H₆ in 1 mole, how many molecules are there in 0.011 moles?
\(molecules of C_{2} H_{6} =\frac{0.011 moles*6.023*10^{23}molecules }{1 mole}\)
molecules of C₂H₆= 6.6253*10²¹
6.6253*10²¹molecules of ethane (C₂H₆) are present in 0.334 g of C₂H₆
Hope you could understand.
If you have any query, feel free to ask.
Consider the reaction below: 4 NH3(g) + 5O2(g) 4 NO(g) + 6 H₂O(g) H°=-906 kJ How many moles of ammonia must react to produce 453 kJ? Show your work on a separate piece of paper or provide the answer in the space provided.
Answers
The given reaction releases 906 kJ of heat energy when 4 moles of ammonia react.
So, the amount of heat energy released when 1 mole of ammonia reacts is:
906 kJ ÷ 4 mol = 226.5 kJ/mol
How many moles of ammonia must react to produce 453 kJ?To produce 453 kJ of heat energy, we can use the following proportion:
226.5 kJ/mol = 453 kJ/x
where x is the number of moles of ammonia required.
Solving for x, we get:
x = (453 kJ × 4 mol) ÷ 906 kJ
x ≈ 2 mol
Therefore, 2 moles of ammonia must react to produce 453 kJ of heat energy.
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The given reaction releases 906 kJ of heat energy when 4 moles of ammonia react.
So, the amount of heat energy released when 1 mole of ammonia reacts is:
906 kJ ÷ 4 mol = 226.5 kJ/mol
How many moles of ammonia must react to produce 453 kJ?To produce 453 kJ of heat energy, we can use the following proportion:
226.5 kJ/mol = 453 kJ/x
where x is the number of moles of ammonia required.
Solving for x, we get:
x = (453 kJ × 4 mol) ÷ 906 kJ
x ≈ 2 mol
Therefore, 2 moles of ammonia must react to produce 453 kJ of heat energy.
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