Final answer:
The mass of magnesium that would combine with 16.0 grams of oxygen is 12.16 grams.
Explanation:
The balanced chemical equation for the reaction between magnesium and oxygen is:
2Mg + O2 → 2MgO
From the equation, we can see that 2 moles of magnesium combine with 1 mole of oxygen to form 2 moles of magnesium oxide. The molar mass of magnesium is 24.31 g/mol, and the molar mass of oxygen is 16.00 g/mol.
To find the mass of magnesium that would combine with 16.0 grams of oxygen, we first convert the mass of oxygen to moles using its molar mass:
16.0 g O2 ÷ 16.00 g/mol = 1.00 mol O2
Since the magnesium-to-oxygen molar ratio is 2:1, there will be half the number of moles of magnesium as there are moles of oxygen:
1.00 mol O2 × (1 mol Mg ÷ 2 mol O2) = 0.50 mol Mg
Finally, we can find the mass of magnesium using its molar mass:
0.50 mol Mg × 24.31 g/mol = 12.16 grams of magnesium
The tendency of an element to react chemically is closely related to
Answer:
The correct answer is: the number of valence electrons
Explanation:
Valence electrons are the electrons present in the outermost electron shell of an atom, also known as the valence shell. If the valence shell is not completely filled, then it is known as an open shell.
The number of valence electrons governs the reactivity and bonding of an element, as they are involved in the chemical bond formation. Therefore, chemical elements having an open shell are reactive in nature.
Therefore, the reactivity of a chemical element is closely related to the number of valence electrons.
If the smallest markings on a ruler are one tenth (1/10) of a centimeter, which of the following measurements could be recorded using that ruler?
A. 2.5 cm
B. 2.52 cm
C. 2.520 cm
D. 2.5200 cm
Answer:
The correct answer is the option: A. 2.5 cm
Explanation:
Hello! Let's solve this!
In a rule we see that it is divided into centimeters, they can be 15 centimeters, 20 centimeters, etc.
It is very easy to see the two centimeters, which are the largest lines. To see after two, we count the smallest stripes and we can reach 2.5 centimeters. But no more than that.
We conclude that the correct answer is the option: A. 2.5 cm
You are investigating an organic compound you discover that it is an aromatic compound often used as flavoring what type of compound is it likely to be
A. Carboxylic acid
B. Anode
C. Aldegyde
D. Ketone
Answer:
C. Aldehyde
Explanation:
answer for Plato users
a chemist wants to combine carbon and iron to form steel. what type of bond will this chemist create between these two elements
Final answer:
The chemist will create a covalent bond between carbon and iron to form steel.
Explanation:
The chemist will create a covalent bond between carbon and iron to form steel.
Covalent bonds form when electrons are shared between atoms. In this case, carbon and iron will share electrons to form a strong bond. Steel is a type of alloy made primarily of iron and carbon, with carbon content typically between 0.2% and 2.1%.
Examples of covalent bonds include the bonding in molecules such as water (H2O), carbon dioxide (CO2), and methane (CH4).
Why is making a peanut pretzel and cereal mixture a physical change?
A block of iron was measured to be 2.00cm by 3.15cm by 5.25cm. If the density of iron is 7.87g/cm^3
The mass of the iron block is calculated using the formula mass = density × volume. With the dimensions provided and density of 7.87 g/cm³, the calculated mass would be approximately 260 g, rounded to three significant figures.
Explanation:The subject of this question is Chemistry, particularly focusing on the concept of density, which is a measure of how much mass is contained in a given volume. The question involves calculating the mass of an iron block given its dimensions and the known density of iron (7.87 g/cm³). To find the mass, we use the formula mass = density × volume. First, we calculate the volume of the block by multiplying its length, width, and height (2.00 cm × 3.15 cm × 5.25 cm), which gives us 33.075 cm³.
Next, we multiply the volume by the density of iron to get the mass: 33.075 cm³ × 7.87 g/cm³ = 260.48025 g. After applying the rules of significant figures, we round the mass to the appropriate number of significant figures, based on the given density (which is reported to three significant figures), so the final mass of the iron block would be approximately 260 g.
Describe the steps involved in the Mole method
Identify the given and convert it to moles. Identify the desired, and multiply the given number of moles by the mole ratio or equation factor, to produce moles of desired substance. Convert moles of desired substance to the units asked for in the question.
Explanation:
The mole method means that the stoichiometry configuration in a chemical equation is represented as number of moles of each substance.
The following steps are involved in the Mole method:
1) Write the balanced chemical equation.
2) Convert the units of given substance(X) into moles.
3) Using the mole ratio to calculate the moles of wanted substance(Y).
4) Convert moles of wanted substance to the desired units.
For example:
Calculate the mass of MgO?
Mass of MgO = Moles of MgO*molar mass of MgO.
Calculate the moles of Mg = Mass of Mg/Molar mass of Mg.
Moles of Mg = m/24.31.
A jewelry company has announced that they have created gold from reacting copper and carbon in a chemical process. according to dalton's atomic theory, is this possible?
Name of the product formed by the reaction of propylide ion and 2-chloropropane?
Answer: 4-methyl-2-pentyne.
Explanation:
Overall reaction is an example for Nucleophilic substitution (SN2) alkylation of alkynes.
What law explains the relationships between different chemical compounds that contain only the elements carbon and oxygen?
I believe the answer in here would be the law of multiple proportions. The law states that whenever the same two elements merge to create more than one compound, the different masses of one element that merge with the same mass of the other element have a ratio that is in whole numbers.
Answer:
law of multiple proportions
What is the name of the group of elements that are unreactive gases?
Actinides series
Halogen gases
Lanthanide series
Noble gases
Answer: Option (d) is the correct answer.
Explanation:
Noble gases are the gases of group 18 which are helium, neon, argon, krypton, xenon and radon.
For example, electronic configuration of neon is [tex]1s^{2}2s^{2}2p^{6}[/tex]
These elements have completely filled shells so, they do not need to gain or lose an electron as they are stabilized.
As a result, noble gases become unreactive in nature.
Thus. we can conclude that noble gases is the name of the group of elements that are unreactive gases.
If you begin with 2.7 g Al and 4.05 g Cl2, what mass of AlCl3 can be produced?
Annabeth has 7.2 cups of cookie batter, represented by this model. If each cookie uses 0.45 cup of batter, how many cookies can annabeth make?
A cell is isotonic to its 4% dextrose solution. when moved to a 6% dextrose solution, that cell will ________.
Answer: will shrink.
Explanation:
The solutions having same osmotic pressure and hence same molar concentration are termed as isotonic. If a solution is of lower osmotic pressure it is called as hypotonic with respect to the concentrate solution. The more concentrated solution is said to be hypertonic with respect to the dilute solution.
When cell is placed in 6% dextrose solution,which is hypertonic to the contents in cell, the water will move from lower osmotic pressure in cell to higher osmotic pressure in 6% dextrose solution through semipermeable membrane and thus the cell will shrink.
Why does the notation 13C- have a negative sign in the upper right hand corner
A neutral atom does not contain any charge because it contains equal number of proton and electron. In this case, we see that the charge is negative 1, so this means that there is 1 more electron than proton for 13C-.
The notation '13C-' denotes a carbon-13 atom that has acquired an extra electron, thus having a net negative charge. Carbon-13 is used in NMR spectroscopy due to its magnetic moment, in contrast to the more common carbon-12 which is NMR-inactive.
The notation 13C- indicates an ion of the carbon isotope with an atomic mass of 13 that has gained an extra electron, leading to a negative charge. The atomic mass (A) of carbon-13 is 13 because it has six protons (which defines it as carbon) and seven neutrons. The negative sign in the upper right-hand corner is not related to the isotope itself but indicates that the atom has an additional electron, giving it a net negative charge. Carbon-12, on the other hand, has six protons and six neutrons, and no charge is indicated when it is in its neutral state.
Carbon-13 is valuable in NMR spectroscopy because unlike the more abundant carbon-12, it has a magnetic moment and is NMR-active, enabling it to provide signals in 13C-NMR spectroscopy. The scarcity and weaker magnetic moment of 13C compared to protons mean that more sample is often required and data from many scans need to be averaged to acquire a clear signal.
How many atoms of carbon are present in 1.0 g of c6h12o6?
0.0055 number of atoms of carbon are present in 1.0 g of C₆H₁₂O₆ .
What do you mean by the number of atoms or mole ?
The mole concept is a convenient method of expressing the amount of a substance.
Mole is the amount of substance that contains as many elementary entities as there are atoms in exactly 12 grams of the carbon−12 isotope.
1 mole=6.022×1023 particles of matter of any chemical substance.
To calculate number of atoms of carbon present in 1.0 g of C₆H₁₂O₆ .
Given ,
mass of carbon =1.0 gm
molar mass =180.01 gm
mole(n)=?
Mole= mass/molar mass
Mole=1/180
Mole=0.0055
Hence, 0.0055 number of atoms are present in 1.0 g of C₆H₁₂O₆ .
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Professor Whitney has a sample of lead and a sample of iron. The samples have equal mass. When Whitney heats the samples, the lead reaches a higher temperature than the iron, even though both samples absorbed the same amount of thermal energy. What can Whitney conclude from this experiment?
Write the complete balanced equation for the following reaction:
C7H6O + O2 yields CO2 + H2O
Explanation:
An equation that consists of same number of atoms on both reactant and product side is known as a balanced chemical equation.
For example, [tex]C_{7}H_{6}O + O_{2} \rightarrow CO_{2} + H_{2}O[/tex]
Number of atoms on reactant side are as follows.
C = 7
H = 6
O = 3
Number of atoms on product side are as follows.
C = 1
H = 2
O = 3
Therefore, to balance this chemical equation we multiply [tex]O_{2}[/tex] by 8 on reactant side. Whereas we multiply [tex]CO_{2}[/tex] by 7 and [tex]H_{2}O[/tex] by 3 on product side.
Therefore, the balanced chemical equation will be as follows.
[tex]C_{7}H_{6}O + 8O_{2} \rightarrow 7CO_{2} + 3H_{2}O[/tex]
Which of the following methods can be used to completely separate a solution containing alcohol and water?
Evaporation and distillation
Filtration
Floatation or centrifuge
Magnetism
Answer:
evaporation and distillation
Explanation:
:)
The methods can be used to completely separate a solution containing alcohol and water in evaporation and distillation. Therefore, option A is correct.
What is distillation ?The act of selectively boiling and condensing substances from a liquid mixture is known as distillation, or classical distillation. This is often done inside a device called a still.
A liquid is heated to its boiling point to evaporate it, then it is condensed back into a liquid to separate it from impurities or other solutes. This process is known as distillation. Distillation is a common technique used by chemists to sort a mixture of solutes.
Among the many industrial uses of distillation are the production of alcoholic drinks, water purification, and oil refining. Distillation is a physical procedure that removes desired pure compounds from an initial source using heat and other techniques.
Thus, option A is correct.
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When snow melts does its volume decrease or increase?
The volume of the snow decreases. This had happened because the snow is made up or comprised of water (H2O) and oxygen (O). When the snow starts melting, the air inside the snow discharges into the atmosphere and the water turn out to be a puddle on the ground.
In a chemical equation, what are the chemicals on the left side of the arrow called?
In a chemical equation, the chemicals on the left side is reactants. The correct option is c.
What is chemical equation?A chemical reaction is a process that converts one or more substances, known as reactants, into one or more different substances, known as products.
Chemical elements or compounds are examples of substances. A chemical reaction rearranges the constituent atoms of the reactants to produce various products.
When chemical bonds between atoms are formed or broken, chemical reactions occur.
The substances that initiate a chemical reaction are known as reactants, and the substances that result from the reaction are known as products.
Combination, decomposition, single-replacement, double-replacement, and combustion are the five basic types of chemical reactions.
Analyzing the reactants and products of a specific reaction will allow you to categorize it.
Thus, the correct option is c.
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Your question seems incomplete, the missing options are:
a. products
b. disaccharides
c. reactants
d. water
Which of the following equalities is not correct?
1 cm3 = 1 mL
1000 mm = 1 m
100 cg = 1 g
10 kg = 1 g
Answer : The incorrect option is, 10 kg = 1 g
Explanation :
The following conversion used are,
Conversion of centimeter cube to milliliters :
[tex]1cm^3=1ml[/tex]
Conversion of millimeter to meter :
[tex]1mm=0.001m[/tex]
or, [tex]1000mm=1m[/tex]
Conversion of centigram to gram :
[tex]1cg=0.1g[/tex]
or, [tex]100cg=1g[/tex]
Conversion of kilogram to gram :
[tex]1Kg=1000g[/tex]
or, [tex]10Kg=10000g[/tex]
As per question, only conversion (10 kg = 1 g) is incorrect conversion. While all the conversion are correct.
Hence, the incorrect option is, 10 kg = 1 g
The theoretical yield of a reaction is 75.0 grams of product and the actual yield is 42.0g. what is the percent yield? 75.0 56.0 31.5 178 none of these
Calculate the ph of 0.63 m nh3 (kb=1.8×10−5).
Min : sec helium and nickel are classified as _____, which are pure substances that make up all kinds of matter
Helium which has a chemical formula of He is considered as a noble gas while Nickel which has a chemical formula of Ni is considered as metallic. Although both have different phases but they are both classified under the general category of “Elements”.
answer:
elements
Helium and nickel are elements, which are pure substances that can't be chemically broken down into simpler forms.
Explanation:Helium and nickel are classified as elements, which are pure substances that make up all kinds of matter. These substances cannot be broken down into simpler substances through chemical changes. Some familiar examples of elements include iron, silver, and gold. There are more than 100 known elements, of which about 90 occur naturally on Earth with the remainder having been created in laboratories.
Diamond is made of carbon atoms attached rigidly to each other in three directions making diamond very strong. graphite, as found in a pencil, is easily broken under pressure. since graphite is also made of carbon atoms, why might it have such a different property?
The different properties of diamond and graphite can be attributed to the different arrangement of carbon atoms in each structure. Diamond has a three-dimensional network of carbon atoms, resulting in strong bonds and hardness. Graphite has a two-dimensional sheet structure, with weak bonds between the layers, making it soft and brittle.
Explanation:The different properties of diamond and graphite can be attributed to the different arrangement of carbon atoms in each structure. In diamond, each carbon atom is bonded to four other carbon atoms in a three-dimensional network, resulting in strong bonds that make diamond extremely hard and rigid. On the other hand, graphite consists of layers of carbon atoms arranged in a two-dimensional sheet structure, with weak bonds between the layers. These weak bonds allow the layers to slide over each other easily, making graphite soft and brittle.
Topsoil occurs in this layer, which is composed of a combination of organic debris and mineral matter
Which element will attract electrons more strongly—fluorine or carbon? explain your answer?
The property which can help us in this case is the electronegativity of atoms. Electronegativity is a measure of how strong an electron will be attracted to that atom. Well, Fluorine is the most electronegative element in the periodic table. Hence the answer is Fluorine.
Which element on the periodic table has the lowest atomic radius?
Answer:
Helium
Explanation:
The atomic radius for Helium is 31x10⁻¹²
The atomic size decrease in the periodic table from left to right
and increases down a group (or line)
Why does the phosphorus cycle occur more slowly than both the carbon cycle and the nitrogen cycle?
Answer:
Explanation:
The phosphorous cycle is slower than carbon cycle and nitrogen cycle because phosphorous is found mainly in very small dust particles.
It moves very slowly from the deposits on land and in sediments and then it is transferred to the organism and from organism it is moved more slowly to the soil.
Then from the soil it is transferred again to the sediments. The whole process is very slow and the amount of phosphorus is also very less as compared to carbon and nitrogen cycle.