Please help me answer that question.

Answer:

Displacement

Explanation:

OH- in the reactant side of the reaction has switched from Na+ to Al 3+ in the product side. Decomposition is where a compound from the reactant side of the reaction would dissolve into elements in the product side, but that's not the case in this example.

The option describes the molecule geometry of a molecule with one bond and three lone pairs. Thus, option B is correct.

A covalent bond is defined as  a chemical bond that includes the sharing of electron pair between atoms.The pair of electrons are know as bonding pairs and the stable balance of attractive and repulsive forces between atoms.

The properties of covalent bond are mentioned below:

The covalent compounds have low melting points and boiling points.The covalent compounds do not contain electricity.

The covalent compounds are  having lower enthalpies of vaporization and fusion.The covalent compounds are easily catches fire and are more flammable than ionic compounds.

The covalent compounds are very soft and flexible. The physical properties of covalent compounds are that they have lower melting points and electrical conductivity.

Therefore, The option describes the molecule geometry of a molecule with one bond and three lone pairs. Thus, option B is correct.

Learn more about covalent bond here:

https://brainly.com/question/10777799

#SPJ2

Answer:

Vanadium (V) is the best conductor of thermal energy in this list

The conversion of units in science is achieved by the use of conversion factors.

A conversion factor is a number used to change a quantity from one unit to another.

The given unit here is the micrometer and we are expected to convert the quantity (mass in this case) from micrometer to meter.

The conversion factor to use is:

1 μm = [tex]1 * 10^-6 m[/tex]

Hence;

0.16 μm = 0.16 μm * 1 * 10^-6 m/ 1 μm

= 1.60 * 10^-7 m

Learn more: https://brainly.com/question/18365833

Answer:

Science is related only to sense-experience, and reason based on the former. It is an accumulation of systematic and verifiable knowledge. The scientific method is one and the same in all branches of knowledge. The unity of science, according to him, consists in its method, not in its material alone.

Explanation:

Answer:

electrons

Explanation:

the atomic number tells you the number of Drotons in one atom of an element.It also tells you the number of electrons in a neutral atom of that element. The atomic number gives the "identity" of an element as well as its location on the periodic table.

Answer:

[tex]\boxed{\boxed {\sf 5930.0 \ mol \ CH_4}}[/tex]

Explanation:

We are asked to find how many moles of methane (CH₄)  a cow produces in a year. We must convert molecules of methane to moles of methane. We will do this using Avogadro's Number or 6.022 × 10²³. This is the number of particles (atoms, molecules, formula units, etc.) in 1 mole of a substance.

In this case, the particles are molecules of methane. There are 6.022 × 10²³ molecules of methane in 1 mole.

We will convert molecules to moles using dimensional analysis. Set up a ratio using Avogadro's Number.

[tex]\frac {6.022 \times 10^{23} \ molecules \ CH_4}{ 1 \ mol \ CH_4}[/tex]

We are converting 3.571 × 10²⁷ molecules of methane to moles, so we multiply the ratio by this value.

[tex]3.571 \times 10^ {27} \ molecules \ CH_4 *\frac {6.022 \times 10^{23} \ molecules \ CH_4}{ 1 \ mol \ CH_4}[/tex]

Flip the ratio. It is still the same value, but the units of molecules of methane cancel.

[tex]3.571 \times 10^ {27} \ molecules \ CH_4 *\frac { 1 \ mol \ CH_4}{6.022 \times 10^{23} \ molecules \ CH_4}[/tex]

[tex]3.571 \times 10^ {27} *\frac { 1 \ mol \ CH_4}{6.022 \times 10^{23} }[/tex]

[tex]\frac {3.571 \times 10^ {27}}{6.022 \times 10^{23} } \ mol \ CH_4[/tex]

[tex]5929.923613 \ mol \ CH_4[/tex]

The original measurement of molecules of methane( 3.571 × 10²⁷ molecules) has 4 significant figures, so our answer must have the same. For the number we calculated, that is the ones place. The 9 in the tenth place tells us to round the 9 in the ones place up to a 0, then the 2 in the tens place up to a 3.

[tex]5930 \ mol \ CH_4[/tex]

We must add a placeholder zero in the tenth place to reach 4 sig figs.

[tex]5930.0 \ mol \ CH_4[/tex]

The adult cow produces approximately 5930.0 moles of methane in a year.

Answer:

$1246.90

Explanation:

Since the bike lost [tex]20%[/tex]% of it's value and it now currently at $[tex]$1039[/tex], we have to do 20% * $1039 to find the amount of money lost. 20%*1039=207.8. We have to add it up to find the original value so 1039+207.8=$1246.8

Answer:

A sodium atom can lose its outer electron. It will still have 11 positive protons but only 10 negative electrons. So, the overall charge is +1.

Answer:

This Scientific notation;

[tex]4.25 \times {10}^{ - 3} [/tex]

This in standered notation ;

[tex]0.00425[/tex]

I hope I helped you^_^

Answer:

none of the above answers

Answer:

the answer is hydrogen which is B

The substance is an element that is considerably composed of molecules known as hydrogen (H2). Thus, the correct option for this question is C.

A chemical element may be defined as a species of an atom that remarkably bears a specific number of sub-atomic particles in its structure. These elements are not further decomposed into smaller components in a chemical reaction.

H2 is also known as molecular hydrogen. It forms when two hydrogen atoms are significantly bonded to one another in order to give rise to a molecule. Water is not an element, it is a molecule. While methane is a chemical compound that possesses a chemical formula CH4. Helium (He) is a chemical element only.

Therefore, hydrogen is an element that is composed of molecules. Thus, the correct option for this question is C.

To learn more about Chemical elements, refer to the link:

https://brainly.com/question/28376204

#SPJ2

Answer:

22 options A cell wall

23 options A anabolism

24 options B 2sugar + 1phosphate group

Ionic substances are formed by exchange of valencies between the ions that make up the substance.

The ion [tex]Al^3+[/tex] has a valency of +3. It exchanges this valency with other ions as it forms ionic substances.

In the case of OH- which has a valency of 1, the compound Al(OH)3 is formed.

In the case of [tex]S^2-[/tex] which has a valency of 2, the compound Al2S3 is formed.

In the case of [tex]PO4^3-[/tex] which has a valency of 3, the compound AlPO4 is formed.

See more: https://brainly.com/question/11527546

The balanced equation for the decomposition by heating of iron(II) sulfate heptahydrate is FeSO₄.7H₂O —> FeSO₄ + 7H₂O.

An equation for a chemical reaction is said to be balanced if both the reactants and the products have the same number of atoms and the total charge for each component of the reaction. In other words, both sides of the reaction have an equal balance of mass and charge.

Here, in the equation FeSO₄.7H₂O —> FeSO₄ + 7H₂O

There is one molecule of iron is given on both sides and seven molecules of water given on both sides. So this equation is balanced. When there are similar molecules present on both sides. If the count on both sides is equal then this is called a balanced equation.

Thus, the balanced equation is  FeSO₄.7H₂O —> FeSO₄ + 7H₂O.

To learn more about balanced equations, refer to the link:

https://brainly.com/question/12192253

#SPJ2

Answer:

Density other dude is incorrect

Explanation:

Density is an intensive, rather than an extensive property of matter.

WHAT ARE INTENSIVE AND EXTENSIVE PROPERTIES?

Therefore, density is an intensive, rather than an extensive property of matter.

Learn more: https://brainly.com/question/3006850?referrer=searchResults

Answer:

The answer is (400, 0.5)

The element is Magnesium

it has electronic configuration

[tex]\\ \sf\longmapsto 2,8,2[/tex]

or

[tex]\\ \sf\longmapsto 1s^22s^22p^63s^2[/tex]

In valence cell it has 2 electrons and therefore its valency is 2

Answer:

Noble gases are stable as they have fully filled outermost orbital. Hence they do not participate in chemical reactions.

But Xenon reacts in some cases in favourable conditions

Answer:

Joule - J

Explanation:

As energy is defined via work, the SI unit of energy is the same as the unit of work – the joule (J).

Answer:

A Type IV PFD is an approved device designed to be thrown to a person in the water. It is not designed to be worn. It is designed to have at least 16.5 pounds of buoyancy. The most com- mon Type IV PFD is a buoyant cushion.

Answer:

Iron has four naturally-occurring stable isotopes, 54Fe, 56Fe, 57Fe and 58Fe. The relative abundances of the Fe isotopes in nature are approximately 54Fe (5.8%), 56Fe (91.7%), 57Fe (2.2%) and 58Fe (0.3%).

Answer:

You are unable to lift an object. Which property makes the object difficult to lift?(1 point)

weight

Answer:

H2O is the formula of water

Answer:

H²O is formula of water

Explanation:

2 molecule of hydrogen and 1 molecule of oxygen

Pressure - Force per unit area

Hope it helped :)