Name a common greenhouse gas containing only hydrogen and oxygen

Answer: oil

Explanation:

Final answer:

The percent magnesium by mass in the original mixture is 153.2%.

Explanation:

To determine the percent magnesium by mass in the original mixture, we need to calculate the mass of magnesium in the mixture. We know that the total mass of the mixture is 11.20 g, and 0.6854 g of hydrogen gas is produced.

First, we need to calculate the moles of hydrogen gas produced. Since 1 mole of hydrogen gas is produced for every 2 moles of magnesium, we can use the molar mass of magnesium (24.31 g/mol) to find the moles of magnesium:

moles of Mg = (0.6854 g H₂) x (1 mol Mg / 2 mol H₂) x (24.31 g/mol) = 0.704 mol Mg

Next, we can calculate the mass of magnesium:

mass of Mg = (0.704 mol Mg) x (24.31 g/mol) = 17.12624 g Mg

Finally, we can calculate the percent magnesium by mass:

percent magnesium = (mass of Mg / total mass of mixture) x 100% = (17.12624 g / 11.20 g) x 100% = 153.2%

The Molarity concentration is expressed in units of moles / L. So let us first determine the number of moles of CH3OH, and then divide that amount by the total volume of 0.230 L of solution.

To determine the number of moles of CH3OH, divide the weight in grams of CH3OH by the molecular weight of CH3OH: (MW of CH3OH = 32 g / mol)

number of moles = 16.8 g / (32 g / mol)

number of moles = 0.525 mol CH3OH 

Then we calculate for molarity:

Molarity = 0.525 mol CH3OH / .230 L

Molarity = 2.2826 mol / L

Molarity = 2.28 M

The molarity of a solution prepared by dissolving 16.8 g of CH₃OH in sufficient water to give exactly 230 mL of solution is 2.28 M.

The concentration of CH₃OH in a solution can be determined by calculating its molarity, which is the number of moles of solute per liter of solution. To find the molarity, we first need to convert the mass of CH₃OH to moles. The molar mass of CH₃OH (Methanol) is 32.04 g/mol.

Step 1: Convert the mass of CH₃OH to moles using its molar mass.
16.8 g CH₃OH ×1 mol CH₃OH / 32.04 g CH₃OH = 0.524 moles CH₃OH

Step 2: Convert the volume of the solution from milliliters to liters.
230 mL ×1000 mL/L = 0.230 L

Step 3: Calculate the molarity of the solution.
0.524 moles CH₃OH / 0.230 L = 2.28 M

Answer:  d.Have the product tested by an independent organization.

Explanation:

A scientific claim can be define as a statement which is based upon the results that are obtained after the process of experimentation. The results of the claim are acceptable by the scientific society.

d.Have the product tested by an independent organization. is the correct option. This is because of the fact that the independent organization will test the supplement by several clinical trials. The results obtain will be unbiased and reliable.

Answer: 18 amu

Explanation:

The atomic mass of hydrogen is 1.008 or 1 (rounded to the nearest whole number)

The atomic mass of oxygen is 15.999 or 16 (rounded to the nearest whole number)

There are 2 hydrogen atoms and one oxygen atom in water.

1+1+16= 18 amu

Answer : The correct option is, Aldehyde.

Explanation :

Ketone group : It is the class of organic compound in which the [tex]-CO[/tex] group is attached to a hydrocarbon is known as ketone.

The general representation of ketone are, [tex]R-CO-R'[/tex].

For example : Acetone, [tex]H_3C-CO-CH_3[/tex]

Aldehyde group : It is the class of organic compound in which the [tex]-CHO[/tex] group is attached to a hydrocarbon is known as aldehyde.

The general representation of aldehyde are, [tex]R-CHO[/tex].

For example : Ethanal , [tex]H_3C-CH_2-CHO[/tex]

Ether group : It is the class of organic compound in which the oxygen is directly attached to the two alkyl group of carbon is known as ether.

The general representation of ether are, [tex]R-O-R^'[/tex].

For example : Dimethyl ether, [tex]H_3C-O-CH_3[/tex]

Amine group : It is the class of organic compound in which the [tex]-NH_2[/tex] group is directly attached to the alkyl group of carbon is known as amine.

The general representation of amine are, [tex]R-NH_2[/tex].

For example : Ethylamine, [tex]H_3C-CH_2-NH_2[/tex]

As per question, aldehyde is an example of an organic compound that contains an attached carbonyl group at the end of the carbon chain.

Hence, the correct option is, Aldehyde.

To find the volume of the Hope diamond, first convert the mass from carats to grams, then divide by the given density. The calculation results in a volume of approximately 2.5 cm³, so the correct answer is option C.

The volume of the Hope diamond can be calculated using its mass and density. First, we convert the mass from carats to grams. Since 1 carat is equivalent to 0.200 grams, the Hope diamond's mass in grams is 44.0 carats × 0.200 g/carat = 8.8 grams. The density formula is density = mass/volume, which can be rearranged to find the volume as volume = mass/density. We use the given density of the diamond, 3.51 g/cm³, to get the volume: volume = 8.8 g / 3.51 g/cm³ = 2.51 cm³. Therefore, the correct answer is 2.5 cm³, so option C is correct.

Temperature does not change during melting because the heat absorbed is used to overcome intermolecular forces rather than to increase the kinetic energy of the particles.

As long as both ice and water are present in the beaker, the temperature of the water will not increase.

The freezing point of water is 0°C (273 K).

The water's temperature should be 0°C (273 K).

When carrying out the experiment of putting three ice cubes in a beaker and letting them partially melt, the student will observe that when measuring the temperature, it will not change during the melting of the ice.

It corresponds to the water cycle in nature, that is, the processes of water transformation, through:

Therefore, there are two laws that determine fusion, which are related to a pure and crystalline substance under a certain pressure will not change its temperature and will remain constant.

This is because the heat absorbed is not used to increase the kinetic energy of the particles, but to overcome the forces of interaction between the molecules.

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Answer:

6

Explanation:

The given electron configuration 1s² 2s² 2p⁶ 3s² 3p⁴.

The valence shell of an atom is the outermost orbit. Here the valence shell is 3 with electrons occupying the  s and p orbitals.

The s orbital has 2 electrons and the 3p orbital has 6 electrons. So adding all the electrons in the 3s and 3p orbital we have a total of 6 electrons in the 3rd valence shell.

The number of valence electron in the element is 6 electrons

Valence electron(s) are the electrons located on the outermost shell of an atom.

From the question given above, we obtained:

Electronic configuration => 1s² 2s²2p⁶ 3s²3p⁴

Total electron in valence shell = 2 + 4

Therefore, the number of valence electron in the element is 6 electrons.

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In order to buffer a strong acid into a weak acid, salt of strong acid should be used as the buffer.

Acids are defined as substances which on dissociation yield H+ ions , and these substances are sour in taste. Compounds such as  HCl, H₂SO₄ and HNO₃ are acids as they yield H+ ions on dissociation.

According to the number of H+ ions which are generated on dissociation acids are classified as mono-protic , di-protic ,tri-protic and polyprotic  acids  depending on the number of protons which are liberated on dissociation.

Acids are widely used in industries  for  production of fertilizers, detergents  batteries and dyes.They are used in chemical industries for production of chemical compounds like salts which are produced by neutralization reactions.

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Explanation:

According to Le Chaltelier's principle, when a system is in chemical equilibrium and there occurs any change in concentration, temperature, or pressure then the equilibrium will shift in the direction which is opposing the change.

For example, when concentration of hydrogen gas is increased for the reaction [tex]H_{g} + I_{2}(g) \rightarrow 2HI[/tex] then equilibrium will shift of the right hand side.

That is, formation of product will become faster on increasing the concentration of hydrogen gas.

    NaOH  + X → NaCH3COO  + H2O

In the incomplete  reaction    above    x  is CH3COOH  (  acetic acid)

Explanation

NaOH + CH3COOH  →  NaCH3COO (salt)  + H2O

The journey of a water molecule through the water cycle begins with evaporation or sublimation, followed by condensation forming clouds. Afterward, precipitation brings the water back to the earth where it becomes part of surface runoff, snowmelt, or infiltrates the soil. Finally, streamflow carries it back to the oceans, completing the cycle.

A water molecule undergoes a fascinating journey as it completes the water cycle. Initiated by the sun's energy, this journey starts with evaporation or sublimation, which are processes that turn surface water or frozen water into water vapor, respectively. The water vapor is then transported into the atmosphere.

As the vapor cools down, the process of condensation takes place, forming clouds consisting of condensed water droplets. Over time, these droplets grow in size and eventually fall to the earth in the form of precipitation (like rain or snow).

Once on earth, the water can take a few different paths. Some fall on tree leaves and evaporate again, some fall directly into bodies of water such as lakes or oceans, while some fall on the ground and become surface runoff or snowmelt. This runoff or snowmelt can infiltrate the soil (subsurface water flow) or flow into streams and rivers (streamflow). These streams and rivers then carry it back into the sea or ocean, completing the cycle.

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Answer:  Carbon

Explanation:  The top layer of the earth is known as lithosphere which contain the crust of the earth.

The earths crust contain some of the most abundant elements which facilitate the human life .

In this series of top abundant elements found in Earths continental crust, Oxygen scores the first position and after that Silicon comes as second and Aluminum bags the third position and so on.

Therefore, carbon does not even come in the top 10 elements which are most abundant in the earths crust.

To calculate the molar mass of a compound, first retrieve the atomic masses for each element from the periodic table, multiply them by the number of atoms in the compound, and add the totals.

The first step when calculating the molar mass of a compound is to identify the atomic masses of each element in the compound. You can find these on the periodic table. Once you have the atomic masses, count the number of atoms for each element in the molecular formula. Then, multiply this number by the atomic mass for each element. Finally, add up all of these values to get the total molar mass.

For example, to calculate the molar mass of glucose (C6H12O6), you would do the following:

Answer:

The chemical reaction is :

[tex]2SO_2(g)+O_2(g)+2H_2O(l)\rightarrow 2H_2SO_4(aq)[/tex]

Explanation:

When sulfur dioxide gas reacts with oxygen gas and liquid water it gives aqueous solution of sulfuric acid.

This is reason behind the acidic nature of the rain water during acid rain.The chemical reaction is given as:

[tex]2SO_2(g)+O_2(g)+2H_2O(l)\rightarrow 2H_2SO_4(aq)[/tex]

According to stoichiometry, 2 moles of sulfur dioxide gas reacts with 1 mole of oxygen gas and 2 moles of water to give 2 moles of aqueous sulfuric acid.

Answer: sink

Explanation:

Two or more than two atoms with different physical or chemical properties can not combine together to form an element.  By removing the repulsions among protons inside the nucleus, neutron provide the stability to an atom.

Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.

An atom of element contains neutrons and protons in the nucleus and electron that revolves around the nucleus. The purpose of neutron is to provide stability to an atom by minimizing the repulsion between protons inside the nucleus.

Therefore by removing the repulsions among protons inside the nucleus, neutron provide the stability to an atom.

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Answer: saturated

Explanation:

Saturated solution is defined as the solution in which no more solute particles can be dissolved in the solvent and thus contain maximum solute at a given temperature.

Unsaturated solution is defined as the solution in which more solute particles can be dissolved in the solvent at any particular temperature.

Supersaturated solution is defined as the solution in which more amount of solute particles is present than the solvent particles and thus the solute is in precipitated form.

Answer: Option (D) is the correct answer.

Explanation:

Law of conservation of mass states that energy can neither be created nor it can be destroyed. It can only be transformed from one form to another.

Therefore, in a chemical reaction an equation can only be balanced if the number of reactants equal the number of products because energy required for reactants is utilized in the formation of the products.

For example, [tex]2Al + 6HCl \rightarrow 2AlCl_{3} + 3H_{2}[/tex] is a balanced equation because the number of reactant atoms equal the number of product atoms.

Thus, we can conclude that out of the given options, [tex]3Ca + 2Cr(NO3)_3 \rightarrow 3Ca(NO3)_{3} + 2Cr[/tex] equations violates the law of conservation of mass because number of reactant atoms does not equal the number of product atoms.

Kinetic and potential energy is the form of energy, the object exists. Energy is neither created nor destroyed. It changes from one form to another.

The energy of the moving object is termed Kinetic energy. However, the stored energy or the energy of the object in the stationary position is the Potential energy.

The statement is true, as the stored energy is the potential energy.

This statement is false, as the moving object energy is the kinetic energy of the object.

The statement is true, as the potential energy of the object is stored in its particles.

The movement of the particle of a substance will result in the kinetic energy of the substance. Thus the statement is true.

The statement is true, as fast the object moves more energy will be required and the conversion of more potential energy to kinetic energy takes place.

The statement is false, as the greater the mass of the object, the greater will be the number of particles and more energy will be stored.

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