16H + 2MnO4 + 5C2O4 = 2Mn + 10CO2 + 8H2O MnO4 mol in 20 mL

Answer:

kilo means one thousand

Explanation:

Seeing as there are 1000 metres in one kilometre

Knowing that 1,000 meters are in 1 kilometer, The prefix kilo means 1000 or 1 kilogram (kg).

The metric system is the system that uses gram, liter, and meter as the base unit for measuring the distance, volume, and length of any object or entity.

The metric system was started in France in 1970. There are common seven units in the metric system. The three main base units are gram, liter, and meter.

A liter is used to measure the Volume. Grams are used to measuring the quantity of a solid item. Meter is used to measure the distance or length of anything.

The kilogram is the base unit for measuring the quantity of any solid item, such as rice, and 1 kg of rice is the quantity of rice.

Thus, the prefix kilo means 1000 or 1 kilogram (kg).

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Answer:

In Parts I and II of the lab, what happened to the electrons of each element to produce the different colors of light? ... When heat was added to the elements, the electrons absorbs the energy and moves to its excited state. Once the electron starts to fall back to a lower orbit, it emits energy in the form of light.

Happy to help ☀️Keep on shining☀️

Explanation:

Answer:

The mass is 63.1 grams.

Explanation:

ck-12 said it was correct.

Answer:

half life of carbon=5730 yrs

half life passed=1.5

how old is the pot=??

Explanation:

about 8595 yrs old bcuz its half life is 5730yrs and after 1.5half lives 8595yrs have passed

Answer:

[tex]\rm C_2H_8N_2O_3[/tex].

Explanation:

Look up the relative atomic mass of these four elements on a modern periodic table:

The relative atomic mass of an element is numerically equal to the mass (in grams, [tex]\rm g[/tex],) of one mole of atoms of this element.

For example, the relative atomic mass of [tex]\rm C[/tex] is approximately [tex]12[/tex]. Therefore, each mole of [tex]\rm C\![/tex] atoms would have a mass of [tex]12\; \rm g[/tex].

This sample contains [tex]24\; \rm g[/tex] of carbon. That would correspond to approximately [tex]\displaystyle \left(\frac{24}{12}\right)\; \rm mol = 2\; \rm mol[/tex] of [tex]\rm C[/tex] atoms.

Similarly, for the other three elements:

[tex]\displaystyle n(\mathrm{H}) \approx \frac{8\; \rm g}{1\; \rm g \cdot mol^{-1}} = 8\; \rm mol[/tex].

[tex]\displaystyle n(\mathrm{N}) \approx \frac{28\; \rm g}{14\; \rm g \cdot mol^{-1}} = 2\; \rm mol[/tex].

[tex]\displaystyle n(\mathrm{O}) \approx \frac{48\; \rm g}{16\; \rm g \cdot mol^{-1}} = 3\; \rm mol[/tex].

Hence, the ratio between these elements in this compound would be:

[tex]n(\mathrm{C}): n(\mathrm{H}): n(\mathrm{N}):n(\mathrm{O}) = 2: 8 : 2 : 3[/tex].

In the empirical formula of a compound, the coefficients should represent the smallest possible integer ratio between the number of atoms of these elements.

[tex]n(\mathrm{C}): n(\mathrm{H}): n(\mathrm{N}):n(\mathrm{O}) = 2: 8 : 2 : 3[/tex] is indeed the smallest possible integer ratio between the number of atoms of these elements.

Apply the Hill System to arrange these four elements in the empirical formula. In the Hill System:

If carbon, [tex]\rm C[/tex], is present in this compound, then:

If there is no carbon [tex]\rm C[/tex] in this compound, then list all the elements in this compound in alphabetical order.

Both [tex]\rm C[/tex] (carbon) and [tex]\rm H[/tex] (hydrogen) are found in this compound. Therefore, the first element in the list would be [tex]\rm C\![/tex]. The second would be [tex]\rm H\![/tex], followed by [tex]\rm N\![/tex] and then [tex]\rm O\![/tex].

Hence, the empirical formula of this compound would be [tex]\rm C_2H_8N_2O_3[/tex].

The empirical formula of the compound is C₂H₈N₂O₃  

From the question given above, the following data were:

Carbon (C) = 24 g

Hydrogen (H) = 8 g

Nitrogen (N) = 28 g

Oxygen (O) = 48 g

The empirical formula of the compound can be obtained as follow:

C = 24 g

H = 8 g

N = 28 g

O = 48 g

C = 24 /12 = 2

H = 8 /1 = 8

N = 28 /14 = 2

O = 48 / 16 = 3

We can see from the above calculations that the elements are in simple whole number ratio.

Thus, the empirical formula of the compound is C₂H₈N₂O₃

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Answer:

Explanation:

a ) 2FeCl₃ + 3Li₂S  = Fe₂S₃ ( s )  + 6 LiCl

2Fe⁺³ + 6Li ⁻ + 6Cl⁻ + 3S⁻² = 6Li + 6Cl⁻ + Fe₂S₃ ( s )

b  )

3CH₃COONa +( NH₄)₃PO₄ = 3CH₃COONH₄ + Na₃PO₄

3CH₃COO + 3Na⁺ +  3NH₄⁻  +  PO₄⁺³  = 3CH₃COO⁻ +3NH₄⁺ + Na₃PO₄

c )

HClO₄  + KOH = kClO₄ + H₂O

H ⁺ + ClO₄⁻ +  K⁺ + OH⁻  =  k⁺  ClO₄⁻  + H₂O

d )

NH₄OH + HNO₃ = NH₄NO₃  + H₂O

NH₄⁺ + OH⁻ + H⁺ + NO₃⁻ = NH₄⁺ + NO₃⁻ +  H₂O

e )

HNO₂ + KOH = KNO₂ + H₂O

H⁺ + NO₂⁻ + K⁺ + OH⁻ = K⁺ + NO₂⁻ + H₂O

f ) HIO₃ + CaCO₃ ( s ) = Ca( IO₃ )₂ + H₂CO₃

H⁺ + IO₃⁻ + CaCO₃ ( s ) = Ca( IO₃ )₂ + H₂CO₃

g )

c ) is strong acid and strong base

d ) is weak base and strong acid

e ) weak acid and strong base

f ) Strong acid and basic salt

Answer:

They would both have a pull.

Explanation:

Every object in space and time has a pull, more specific, a gravitational pull. The objects will have a very slight pul, but still have a gravitational pull.

Answer:

They would both have a pull.

Explanation:

also how do u do that obj thing???



Answer:

changes like leaves turning color in the fall are chemical changes. They involve chemical reactions. Bonds break in chemicals and new bonds form. Substances change into new chemical compounds.

Explanation:

Answer:

The average kinetic energy of the oxygen molecules in the container increases

Explanation:

I searched up, "what happens when the temperature of oxygen gas is increased''

As the temperature increases, the average kinetic energy increases as does the velocity of the gas particles hitting the walls of the container. The force exerted by the particles per unit of area on the container is the pressure, so as the temperature increases the pressure must also increase.

this is the answer google gave me so im not sure of you should 100% trust it but its better than nothing

The temperature of a container of oxygen gas is increased from 149 k to 298 k then the average kinetic energy of the oxygen molecules in the container increases. Thus option C is true.

A kinetic energy is defined as a form of energy that an object or particle has by its motion.

It can be expressed as

K.E. = 1/2 mv²

There are basically three types of kinetic energy.

The average kinetic energy is a product of half of the mass of each gaseous molecules.

The average kinetic energy is directly proportional to temperature.

Thus, the temperature of a container of oxygen gas is increased from 149 k to 298 k then the average kinetic energy of the oxygen molecules in the container increases. Thus option C is true.

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Answer:

7.57×10⁹ bacteria.

Explanation:

We'll begin by convert 100 gallons of water to millilitres (mL). This can be obtained as follow:

1 gallon = 3785.41 mL

Therefore,

100 gallons = 100 gallon × 3785.41 mL / 1 gallon

100 gallons = 378541 mL

Therefore, 100 gallons of water is equivalent to 378541 mL.

Next, we shall convert 378541 mL to drop of water. This can be obtained as follow:

1 mL = 1 drop

Therefore,

378541 mL = 378541 mL × 1 drop/ 1 mL

378541 mL = 378541 drop

Therefore, 378541 mL is equivalent to 378541 drops of water.

Finally, we shall determine the number of bacteria in 378541 drops of water as follow:

1 drop = 2×10⁴ bacteria

Therefore,

378541 drop = 378541 drop × 2×10⁴ bacteria / 1 drop

378541 drop = 7.57×10⁹ bacteria.

Therefore, there are 7.57×10⁹ bacteria in 100 gallons of water

Answer:

B: Olfactory Bulb

Explanation:

edg2020

The olfactory bulb is located at the base of the brain and receives neural signals about the smell from the sensory receptors. Hence, option B is correct.

Sensory receptors are dendrites of sensory neurons specialized for receiving specific kinds of stimuli.

There are two olfactory bulbs on the bottom side of the brain, one above each nasal cavity.

The olfactory bulbs receive information about smells from the nose and send it to the brain by way of the olfactory tracts.

Hence, option B is correct.

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Answer:

Sp3

Explanation:

According to the question, atom 1 is an N atom bonded to 2 C atoms and 1 H atom through single bonds.

Whenever nitrogen is bonded to three atoms via single bonds (in this case two carbon atoms and one hydrogen atom) the nitrogen atom is sp3 hybridized and in tetrahedral geometry. The lone pair on nitrogen atom occupies one of the hybrid sp3 orbitals.

Cyanazine is used as an herbicide to control the growth of weeds and annual grasses. The herbicide has been phased out due to increased toxicity to the environment and humans.

The hybridization of the molecule is sp³.

The given information in the question suggests that Nitrogen (atom 1) to two Carbon atoms and single bonded to 1 hydrogen atom.

The nitrogen is bonded with three single bonds, two with carbon and one with a hydrogen bond.

Based on the given data, the hybridization of the molecule will be sp³ and will have tetrahedral geometry. The lone pair present on the nitrogen atom will occupy one of the hybrid sp³ orbitals.

Therefore, the sp3 hybridization of the cyanazine molecule will exist.

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Answer:

2

Explanation:

16 ÷ 8 = 2

Answer:

Substance G reacts with compound XY to form GY and X.

Explanation:

B. Substance G reacts with compound XY to form GY and X.

What is single replacement reaction?

2HCl(aq) + Zn(s) → ZnCl₂(aq) + H₂(g)

Therefore, correct option is B.

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Answer:

There are 3.011 × 10^23 oxygen atoms

Answer:

the formula is 164.088 g/mol

Explanation:

The chemical formula of carbonic acid is H₂CO₃ and in the structure form it will be represented according to the first structure.

Acids are those substances which are having carboxylic group (-COOH) as a funtional group in it.

Given molecular formula of carbonic acids is H₂CO₃, in which one carbon atom is present in carboxylic group. In the molecule two hydrogen atoms are present and one of them is present in -COOH group and all three oxygen atoms are attached with carbon atom.

Hence the first image shows the structure of carbonic acid.

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Answer:

Option A is correct = combustion

Explanation:

When substance react with oxygen combustion is occur. The substance which burned is called fuel and in this process large amount of heat is released to the surrounding. It is exothermic process.

For example:

4Li + O₂    →      2Li₂O

2Mg + O₂    →    2MgO

 S +  O₂      →      SO₂  

The product which is formed as a result of combustion reaction are called oxides.  

In given examples we can see that lithium, magnesium and sulfur react with oxygen and product formed is oxides of respective elements such as lithium oxide ( Li₂O), magnesium oxide (MgO) and sulfur oxide ( SO₂ ).

Other options are incorrect because:

Single replacement:

It is the reaction in which one elements replace the other element in compound.

AB + C → AC + B

Double replacement:

It is the reaction in which two compound exchange their ions and form new compounds.

AB + CD → AC +BD

Decomposition reaction:

It is the reaction in which one reactant is break down into two or more product.

AB → A + B

Answer:

a

Explanation:

Answer:

Sixth transition element: [X] 3d8 4s0

Seventh transition element: [X] 3d8 4s0

Explanation:

In the universe, we have 5 number of "d" orbitals.

Now, Aufbau's rule states that in the ground state of an atom/ion, the electrons will usually fill atomic orbitals of the lowest available energy levels before they occupy higher levels. Meanwhile Hund's rule states that all orbitals in a subshell will be singly occupied with one electron before any single orbital is doubly occupied, and also all electrons in singly occupied orbitals will have the same spin.

From the periodic table, we know that the 6th & 7th transition elements in the universe are Iron & cobalt respectively. Their respective electronic configuration are;

Iron - [Ar] 3d6 4s2

Cobalt - [Ar] 3d7 4s2

Now, in the new universe(L) where there are 8 d - orbitals: from a combination of aufbau's rule and hund's rule; since there are six numbers of d orbitals as earlier said, in iron, which is the sixth transition metal, due to the fact that half filled orbitals will be more stable than partially filled orbitals, it means the 4s orbital will be empty and then two electrons will be removed from the 4s and used to fill the 3d orbital to half way.

Thus, ground state configurations of

Iron = [X] 3d8 4s0

Similarly, for the 7th transition element which is cobalt, the new extra electron will just fill the lower energy orbital which is 4s,thereby leaving the eight numbers of 3d orbitals to be half filled.

Thus, ground state configurations of

Cobalt = [X] 3d8 4s1

Therefore their ground state configurations are;

- Sixth transition element: [X] 3d8 4s0

Seventh transition element: [X] 3d8 4s1

Answer:

The protein has 4 subunits: 2 subunits of 90 kDa, 1 subunit of 160 kDa and 1 subunit of 60 kDa

Explanation:

In gel electrophoresis, the SDS agent produces denaturation of the protein and confers negative charge, so the protein subunits can migrate according to their masses. It produces dissociation of the protein in its subunits but it cannot disrupt disulphyde bridges (S-S) that can bond subunits together.

From the data, with SDS we observe 3 bands ⇒ 180 kDa + 160 kDa + 60 kDa

The addition of dithiotreitol (DTT), a reducing agent, produces the disruption of disulphyde bridges. From the data:

With DTT ⇒ 160 kDa + 90 kDa + 60 kDa

We observe that 160 kDa and 60 kDa subunits are conserved (they are the same as with SDS only), but 180 kDa subunit is missing and in its place appears a band of 90 kDa - a half 180 kDa.

So, the band at 180 kDa is composed by two subunits bonded by a disulphyde bridge.

Therefore, the composition of the protein is: 1 subunit of 160 kDa, 2 subunits of 90 kDa and 1 subunit of 60 kDa.

Carbon, C, P Block, 2, 6, 12.0107u. 6 protons, 6 electrons, 6 neutrons

Helium, He, S Block, 1, 2, 4.0026u, 2 protons, 2 electrons, 2 neutrons

Germanium, Ge, P Block, 4, 32, 72.64u, 32 protons, 32 electrons, 41 neutrons

Oxygen, O, P Block, 2, 8, 16u, 8 protons, 8 electrons, 8 neutrons

Scandium, Sc, D Block, 4, 21, 44.9559u, 21 protons, 21 electrons, 24 neutrons

Tellurium, Te, P Block, 5, 52, 127.60u, 52 protons, 52 electrons, 76 neutrons

Hydrogen, H, S Block, 1, 1, 1.008u, 1 proton, 1 electron, 0 neutrons

Iron, Fe, D Block, 4, 26, 55.845u, 26 protons, 26 electrons, 30 neutrons

Beryllium, Be, S Block, 2, 4, 9.012u, 4 protons, 4 electrons, 5 neutrons

Vanadium, V, D Block, 4, 23, 50.942u, 23 protons, 23 electrons, 28 neutrons

Silver, Ag, D Block, 5, 47, 108u, 47 protons, 47 electrons, 61 neutrons

Gallium, Ga, P Block, 4, 31, 69.723u, 31 protons, 31 electrons, 39 neutrons

Bromine, Br, P Block, 4, 35, 79.904u, 35 protons, 35 electrons, 45 neutrons

Fluorine, F, P Block, 2, 9, 18.998u, 9 protons, 9 electrons, 10 neutrons

Manganese, Mn, D Block, 4, 25, 54.938u, 25 protons, 25 electrons, 30 neutrons

Strontium, Sr, S Block, 5, 38, 87.62u, 38 protons, 38 electrons, 50 neutrons

Francium, Fr, S Block, 7, 87, 223u, 87 protons, 87 electrons, 136 neutrons

Answer:

Carbon, C, P Block, 2, 6, 12.0107u. 6 protons, 6 electrons, 6 neutrons

Helium, He, S Block, 1, 2, 4.0026u, 2 protons, 2 electrons, 2 neutrons

Germanium, Ge, P Block, 4, 32, 72.64u, 32 protons, 32 electrons, 41 neutrons

Oxygen, O, P Block, 2, 8, 16u, 8 protons, 8 electrons, 8 neutrons

Scandium, Sc, D Block, 4, 21, 44.9559u, 21 protons, 21 electrons, 24 neutrons

Tellurium, Te, P Block, 5, 52, 127.60u, 52 protons, 52 electrons, 76 neutrons

Hydrogen, H, S Block, 1, 1, 1.008u, 1 proton, 1 electron, 0 neutrons

Iron, Fe, D Block, 4, 26, 55.845u, 26 protons, 26 electrons, 30 neutrons

Beryllium, Be, S Block, 2, 4, 9.012u, 4 protons, 4 electrons, 5 neutrons

Vanadium, V, D Block, 4, 23, 50.942u, 23 protons, 23 electrons, 28 neutrons

Silver, Ag, D Block, 5, 47, 108u, 47 protons, 47 electrons, 61 neutrons

Gallium, Ga, P Block, 4, 31, 69.723u, 31 protons, 31 electrons, 39 neutrons

Bromine, Br, P Block, 4, 35, 79.904u, 35 protons, 35 electrons, 45 neutrons

Fluorine, F, P Block, 2, 9, 18.998u, 9 protons, 9 electrons, 10 neutrons

Manganese, Mn, D Block, 4, 25, 54.938u, 25 protons, 25 electrons, 30 neutrons

Strontium, Sr, S Block, 5, 38, 87.62u, 38 protons, 38 electrons, 50 neutrons

Francium, Fr, S Block, 7, 87, 223u, 87 protons, 87 electrons, 136 neutrons

Explanation:

Answer:

900 J/kg°C.

Explanation:

Answer:

use the percent as the abundance and multiply it by the atomic mass and add the values together

Explanation: idk but i got it from quizlet

We have that the % values  shown in the sim into a number you could use for your calculation of average  masses is given as

[tex]Avg M=\frac{\sum(atomic masses of every existing element)}{100 atoms}[/tex]

From the question we are told

If you assumed 100 total atoms in a sample, how could you relate the % values  shown in the sim into a number you could use for your calculation of average  masses?

Generally

We will consider  that the 100 total atoms  as the the atoms at  a 100 percent

The substance at a 100 atoms is to be calculated and is to be given as

Generally the equation for the  average atomic mass  is mathematically given as

[tex]Avg M=\frac{\sum(atomic masses of every existing element)}{100 atoms}[/tex]

Therefore

Now, the % values  shown in the sim into a number you could use for your calculation of average  masses is given as

[tex]Avg M=\frac{\sum(atomic masses of every existing element)}{100 atoms}[/tex]

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Answer:

Enthalpy of formation of KF = -555 kJ/mol

Enthalpy of formation of CsF = -539kJ/mol

Explanation:

Explanations are provided in the attachment below

Answer:

Moles of KOH in 1000 mL solution = 0.255 moles

Moles of KOH in 1 mL solution = 0.255/1000 = 0.000255 moles

Moles in 95 mL solution = (95 * 255)/1000000 = 24225/1000000

Moles of KOH in 95 mL 0.255M solution = 0.024225 moles

The number of moles of KOH present in 95.0 ml of 0.255 M solution is 0.024mol

HOW TO CALCULATE NUMBER OF MOLES:

no. of moles = molarity (M) × volume (L)

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Answer: Bones.

Explanation:

Answer:

Bone

Explanation:

Answer:

D. Photosynthesis uses carbon dioxide while cellular produces carbon dioxide

Answer:

What are the characteristics of science? Objectivity: Scientific knowledge is objective. Verifiability: Science rests upon sense data, i.e., data gathered through our senses—eye, ear, nose, tongue and touch. Ethical Neutrality: Science is ethically neutral. Systematic Exploration.

Explanation:

there are no options but I search and this is what I got.

can I have brainliest

Answer:

C

Explanation:

O2 is a gas and gas has spread out molecules compared to the other states of matter. As such, liquid and solids have stronger intermolecular forces. Since dioxygen is the only gas in the possible answers, O2 has the weakest intermolecular force.

The substance with the weakest intermolecular forces among the options provided is [tex]O_2[/tex](g), which refers to gaseous oxygen molecules. The correct answer is option C.

Intermolecular forces are the attractive forces that exist between molecules and affect the physical properties of substances. The strength of intermolecular forces depends on factors such as the types of molecules involved and their molecular structures.

Among these options, the substance [tex]O_2[/tex](g) has the weakest intermolecular forces. Gaseous oxygen ([tex]O_2[/tex]) molecules are non-polar and are held together by relatively weak London dispersion forces, which are a type of van der Waals forces. These forces arise from temporary fluctuations in electron density within the molecules.

Therefore, compared to the other options, [tex]O_2[/tex](g) has the weakest intermolecular forces because the dispersion forces are generally weaker than the dipole-dipole forces present in the other substances.

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