Which of the following has a higher electronegativity oxygen or selenium?

Answer: hydrogen + oxygen Right arrow .water

Explanation:

The exact equation for this reaction is;

2H2  +  O2 ------------->   2H2O

hydrogen + oxygen Right arrow. water is the correct option.

The equation shows hydrogen reacting with oxygen to form water is as follows:-

\(2H_2+O_2\rightarrow2H_2O\)

The above reaction in word form is written as follows:-

\(hydrogen+Oxygen \rightarrow water\)

So, hydrogen + oxygen Right arrow. water is the correct option.

Hydrogen-H

Oxyden-O

Water-\(H_2O\)

To know more about:-

brainly.com/question/2088210

Answer: 6158.46

Explanation:

1 mole of helium gas contains 6.02 x1023 helium atoms. 1 mole of water contains 6.02 x1023 water molecules.

Answer:

Wood

Explanation:

Because the nail is driven into the wood by the force of the hammer.

Answer:

#3

Explanation:

not sure but it's close to 5,100

It is crucial to maintain a constant temperature because the incubator will work with living things. Additionally, these samples are quite delicate.

Designing materials for use in engineering applications at high temperatures requires consideration of thermal stability. The ability of an alloy to maintain ductility and toughness during prolonged temperature exposure can be referred to as this property.

Several growth restrictions are present for organisms developing at low temperatures: nucleic acid structures become much more solid, membrane fluidity diminishes, enzyme reaction rates slow down, affinity of transport and uptake systems declines.

To know more about stable temperature visit:

https://brainly.com/question/6655856

#SPJ1

The density of aluminium crystallized in a face-centered cubic unit cell with an edge length of 405 pm is 2.7 g/cm3.

To calculate the density, divide the mass of the substance by the volume.

Mass can be calculated using the atomic mass of aluminium (26.98 amu) and the Avogadro constant (6.022x1023 atoms/mol) which can be used to convert moles of atoms to grams.

Volume can be calculated using the edge length of the unit cell (405 pm) and the Avogadro constant.

First, calculate the volume of the unit cell using the following formula:

Volume of a unit cell = (Edge Length)3

Plugging in the edge length of 405 pm, the volume of the unit cell is 8.096x10-23 cm3.

Next, calculate the mass of the substance by multiplying the atomic mass of aluminium (26.98 amu) by the Avogadro constant (6.022x1023 atoms/mol). This gives us a mass of 1.63x10-22 g.

Finally, calculate the density of aluminum by dividing the mass of the substance by the volume of the unit cell:

Density = Mass / Volume

Plugging in the mass and volume calculated above, the density of aluminum crystallized in a face-centered cubic unit cell with an edge length of 405 pm is 2.7 g/cm3.

To know more about density, refer here:

https://brainly.com/question/29775886#

#SPJ11

Answer:

0.86363636

Approximately= 0.8636

Explanation:

2+7.5= 9.5

9.5/11

=0.86363636

Approx.= 0.8636

This chemical is known as lead (II) nitrate. It is an ionic assembly (salt compound) comprised of lead cations in the +2 oxidation state. With regard to the naming convention, each lead (II) cation is paired with two nitrate anions, each having a charge of -1.

Chemical nomenclature is a set of principles for naming chemical substances in a systematic manner. The International Union of Pure and Applied Chemistry designed and developed the most widely used nomenclature in the world (IUPAC).

The basic goal of chemical nomenclature is to guarantee that no ambiguity exists between a spoken or written chemical name and the chemical compound to which the name refers. Each chemical name should only relate to one substance.

It is required to indicate the charge of these cations or compounds containing these cations when identifying them. Ionic compounds are formed when cations and anions interact. The cation of an ionic compound is named first, followed by the anion. When writing their chemical formulae, they use the same format.

Learn more about naming conventions:
https://brainly.com/question/14326884
#SPJ1

If a proposed mechanism is inconsistent with the experimentally determined rate law, it does not necessarily mean that the rate law is inaccurate. Instead, it suggests that the proposed mechanism is not supported by the experimental evidence and may require further investigation.

The proposed mechanism for a chemical reaction describes the sequence of steps by which the reactants are converted to products. The rate law for a chemical reaction, on the other hand, describes the relationship between the rate of reaction and the concentrations of the reactants.

If a proposed mechanism is inconsistent with the experimentally determined rate law, it does not necessarily mean that the rate law is inaccurate. It simply means that the proposed mechanism is not supported by the experimental evidence. There could be a number of reasons for this inconsistency, including errors in the proposed mechanism, experimental errors in measuring the rate of reaction, or other factors that affect the rate of reaction.

In fact, inconsistencies between the proposed mechanism and the experimentally determined rate law can provide valuable information about the reaction. By analyzing these inconsistencies and comparing them to other data, researchers can refine their understanding of the reaction mechanism and identify areas for further study.

For such more questions on Mechanism:

https://brainly.com/question/27921705

#SPJ11

Answer:

Nonpolar molecules dissolve in nonpolar solvents through a process called dispersion forces or London forces.

In nonpolar molecules, the electrons are evenly distributed and there is no permanent dipole moment, which means that the molecule has no positive or negative poles. When nonpolar molecules are added to a nonpolar solvent, such as oil or hexane, the molecules are attracted to one another due to London dispersion forces.

London forces are due to temporary fluctuations in electron density within molecules, creating temporary dipoles. These temporary dipoles induce corresponding temporary dipoles in other nearby molecules, attracting them to each other. The strength of the London dispersion forces increases with the size of the molecule, since larger molecules have more electrons and a greater potential for temporary dipoles.

In general, nonpolar molecules bind together in nonpolar solvents through these weak intermolecular forces, allowing them to dissolve and form a homogeneous solution.

Explanation:

Answer:

if you are asking for the chemical reaction:

Ca(OH)2 + H3PO4-------> Ca3(PO4)2 + H2O

Explanation:

In this reaction, phosphoric acid, H3PO4 , a weak acid, will react with calcium hydroxide, Ca(OH)2 , a strong base, to produce calcium phosphate, Ca3(PO4)2 , an insoluble salt, and water.

I think the answer is beryllium.

because it's not sulfur or carbon and probably not cesium

Answer:

covalent bonds

Explanation:

Answer:

72.14878 grams

Explanation:

Answer:

Explanation:

As per the question, the most rational claim that the student can make about the aluminum metal is that 'it could be stretched into a thin wire' without breaking which shows its ductility. It is one of the most significant characteristics of a metal. Metals can conduct electricity in any state and not only when melted. Thus, option A is wrong. Options C and D are incorrect as metals neither have the same shape always nor do they break on hitting with a hammer. Therefore, option E is the correct answer.

Answer:

Yes, the other person is correct; the answer is E. It could be stretched into a thin wire.

Explanation:

Here is why it is NOT B:

"A briskly burning wood fire is plenty hot enough to melt aluminum. If it's just smoldering (like a lot of campfires) it won't create enough heat to melt aluminum."

Therefore, CAMPFIRES are not likely to melt aluminum if it is thrown in. Aluminum's melting point is 1,221 ° F. Typical campfires are about 900 ° F.

You're Welcome

~Kicho [nm68]

Answer:

magnification and resolution  

Explanation:

Two parameters are especially important in microscopy: magnification and resolution. Magnification is a measure of how much larger a microscope (or set of lenses within a microscope) causes an object to appear.

None, it will all be lost as Carbon dioxide.

Krebs or citric acid cycle is also known as The tricarboxylic acid (TCA) cycle.

The main source of energy for cells and an important part of aerobic respiration. Aerobic respiration is the respiration occurs in the presence of oxygen.

This cycle harnesses the available chemical energy of the acetyl coenzyme A (acetyl CoA) into the reducing power of nicotinamide adenine dinucleotide (NADH).

TCA cycle metabolizes acetate that is derived from carbohydrates, proteins, and fats to form adenosine triphosphate (ATP) which is the body's energy currency.

To know more about TCA cycle:

brainly.com/question/15561070

#SPJ4

Answer:

inversely proportional

Explanation:

The correct answer is (D). Oxidation occurs when there is an increase in the number of carbon-oxygen bonds.

Oxidation is the loss of electrons or an increase in the oxidation state of an atom, molecule, or ion. It occurs when oxygen atoms are added to another molecule and creates a new bond between the oxygen atom and the other atom, resulting in an increase in the number of carbon-oxygen bonds.

Antoine Lavoisier used the term "oxidation" to describe the reaction of a material with oxygen. The meaning was later expanded to cover additional reactions in which electrons are lost, regardless of whether oxygen was present, after it was realised that the substance loses electrons when it is oxidised.

Therefore the correct alternative is: 'Oxidation occurs when there is an increase in the number of carbon-oxygen bonds.'

To know more about Oxidation here:
https://brainly.com/question/9496279#

#SPJ11

Answer is chemical change

Answer:

m=1,48g

Explanation:

The given amounts and temperatures, option B (50.0 g Pb(NO3)2 in 95.0 g of water at 10 °C) will completely dissolve.

Option A: 15.0 g KC103 in 115 g of water at 25 °C

We need to check if the solubility of KC103 at 25 °C is such that 15.0 g can completely dissolve in 115 g of water. Since we don't have information about the solubility of KC103 at this temperature, we cannot determine if it will completely dissolve. Therefore, option A cannot be determined from the given information.

Option B: 50.0 g Pb(NO3)2 in 95.0 g of water at 10 °C

In this case, we have the specific substance (Pb(NO3)2) and its amount (50.0 g) along with the amount of water (95.0 g) and temperature (10 °C). By consulting solubility tables or reference sources, we can determine that Pb(NO3)2 is highly soluble in water at 10 °C. Therefore, the given amount of 50.0 g will completely dissolve in 95.0 g of water. Thus, option B is correct.

Option C: 45.0 g CaC12 in 105 g of water at 5 °C

Similar to option A, we lack information about the solubility of CaC12 at 5 °C. Without knowing the solubility, we cannot determine if the given amount of CaC12 will completely dissolve in 105 g of water. Therefore, option C cannot be determined from the given information.

In summary, the correct option is B (50.0 g Pb(NO3)2 in 95.0 g of water at 10 °C) because Pb(NO3)2 is highly soluble in water at that temperature. Options A and C cannot be determined without additional information about the solubility of KC103 and CaC12 at their respective temperatures.

To know more about dissolve, refer here:

https://brainly.com/question/2364287#

#SPJ11

All Options are Correct. A. 15.0 g \(KC_{103\) in 115 g of water at 25 °C

\(KC_{103\) is potassium chloride.

15.0 g of \(KC_{103\) will completely dissolve in 115 g of water at 25 °C.

In each of the given scenarios, we need to determine whether a certain amount of solid will completely dissolve in a certain amount of water at a specific temperature.

We know that the mass of the solid is 15.0 g, and we want to find the volume of water required to completely dissolve it. Since the density of potassium chloride is 1.34 g/mL, we can calculate the volume of water required using the formula: V/M

B. 50.0 g  \(Pb(NO_3)_2\) in 95.0 g of water at 10 °C

\(Pb(NO_3)_2\) is lead nitrate.

50.0 g of \(Pb(NO_3)_2\) will not completely dissolve in 95.0 g of water at 10 °C. Part of the lead nitrate will remain as solids.

C. 45.0 g  \(CaC_{12\)  in 105 g of water at 5 °C

\(CaC_{12\)  is calcium chloride.

45.0 g of \(CaC_{12\) will completely dissolve in 105 g of water at 5 °C.  

Learn more about water Visit: brainly.com/question/25326161

#SPJ4

The carbon atoms in diamond are held together by four covalent bonds, and the sheets of carbon atoms in graphite are held together by three covalent bonds.

A covalent bond is the sharing of one or more pairs of electrons between two atoms, thereby forming a bond.

The carbon atoms in diamond are held together by 4 covalent bonds with other carbon atoms, hence making it strong.

The carbon atoms in graphite are held together by three covalent bonds between the carbon atoms.

Find out more on Covalent bond at: https://brainly.com/question/1853488

Answer: Covalent; Intermolecular; very different from

Explanation:

Answer:

The volume of the 0.76 M NaCl solution containing 0.35 g of NaCl is approximately 7.89 mL.

Explanation:

To solve this problem, we need to use the relationship between the amount of solute (in moles), concentration (in molarity), and volume (in liters):

amount of solute (in moles) = concentration (in M) x volume (in L)

First, let's calculate the amount of NaCl in moles using the given mass and molarity:

moles of NaCl = mass of NaCl / molar mass of NaCl

moles of NaCl = 0.35 g / 58.44 g/mol (molar mass of NaCl)

moles of NaCl = 0.005992 mol

Next, we can use the above equation to solve for the volume of the solution:

0.005992 mol = 0.76 M x volume (in L)

volume (in L) = 0.005992 mol / 0.76 M

volume (in L) = 0.00789 L or 7.89 mL (rounded to three significant figures)

Therefore, the volume of the 0.76 M NaCl solution containing 0.35 g of NaCl is approximately 7.89 mL.

When solid chromium(III) oxide reacts with liquid aluminium to give liquid chromium and liquid aluminium oxide at high temperature, the balanced chemical equation of the reaction including the states of matter can be written as :

                    Cr₂O₃(s) + 2Al(l)    →   2Cr(l) + Al₂O₃(l)

This reaction occurs at high temperature because the reactivity is increased under this condition.The liquid aluminium is oxidized to form liquid aluminum oxide and the solid chromium(III) oxide is reduced to form liquid chromium.

Chromium(III) oxide is amphoteric in nature and insoluble in water. If it is reacted with aluminium, it gets reduced to the chromium metal. It is a type of simple replacement reaction as Chromium metal is replaced by the aluminium. It is an example of displacement reaction.

Correct question is -

The following reaction takes place at high temperatures. solid chromium(III) oxide reacts with liquid aluminum to give liquid chromium and liquid aluminum oxide. Write the balanced chemical equation (includes the states of matter).

To learn more about chromium(III) oxide,

brainly.com/question/28274299

#SPJ4

Answer:

When coyotes are absent or even greatly reduced in a natural area, the relationships between species below them in the web are altered, putting many small species at risk.

The pair that is not a conjugate base-acid pair is: HSO₄⁻ : SO₂⁻⁴. Option 4 is correct.

HSO₄⁻ is the conjugate base of H₂SO₄ (sulfuric acid), and SO₂⁻⁴ is not a valid acid because it has a charge of -2 and cannot donate a proton (H⁺). Therefore, HSO₄⁻ and SO₂⁻⁴ do not form a conjugate base-acid pair.

A conjugate base is the species that remains after a Bronsted-Lowry acid has donated a proton (H⁺). It is formed when an acid loses a proton and the resulting species has one less positive charge.

For example, in the reaction;

HA + H₂O ↔ A⁻ + H₃O⁺

HA is the acid and donates a proton to H₂O, which acts as a base to form the conjugate base A-. The species A⁻ is the conjugate base of the acid HA.

Hence, 4. is the correct option.

To know more about conjugate base here

https://brainly.com/question/12883745

#SPJ4

Ibuprofen is an analgesic and has the molecular formula C14H18O2 based on its empirical formula.

The chemical weight is an equation that specifies how many atom of each element there are in a single compound's moleculeIt shows the exact number of atoms in a given molecule. For instance, the molecular formula for propane is C4H10.The given compound has a formula of three - carbon atoms and 9 hydrogen atoms.

A molecule's molecular formula reveals which ions how many of each kind are included within it. No subtitle is used if there is just one molecule of a certain kind. A subscript is added to the symbol for an atom if it contains two and more of a certain type of atom.

To know more about molecular formula visit :

https://brainly.com/question/14425626

#SPJ4