define thermal and electrical conductivity, solubility, magnetism, melting and boiling points

Answer:

MgO (Magnesium Oxide)

Explanation:

K20 = 1,343° ±5° C

MgO = 5,166°F (2,852°C)

MgO > K20

Answer:

129.8 grams

Explanation:

Im a bit confused of what your are asking but if your are asking the mass in grams of K (Potassium) it is very easy dont worry

You multiply mols x Molecular weight.

So

3.32x 39.1= 129.8 grams

Answer:

The halogenation of propane discloses an interesting feature of these reactions. All the hydrogens in a complex alkane do not exhibit equal reactivity. For example, propane has eight hydrogens, six of them being structurally equivalent primary, and the other two being secondary

Answer:

A inside the nucleus

Explanation:

All the protons (and neutrons) in an atom belong in the nucleus of an atom. Only the electrons of an atom stay in orbit.

Explanation:

The kinetic energy of an object is given by :

[tex]K=\dfrac{1}{2}mv^2[/tex]

1. Mass, m = 5 kg

Speed, v = 2 m/s

[tex]K_1=\dfrac{1}{2}\times 5\times (2)^2\\\\=10\ J[/tex]

2. Mass, m = 71 kg

Speed, v = 1 m/s

[tex]K_2=\dfrac{1}{2}\times 71\times (1)^2\\\\=35.5\ J[/tex]

3.  Mass, m = 71 kg

Speed, v = 5 m/s

[tex]K_3=\dfrac{1}{2}\times 71\times (5)^2\\\\=887.5\ J[/tex]

4. Mass, m = 1816 kg

Speed, v = 25 m/s

[tex]K_4=\dfrac{1}{2}\times 1816\times (25)^2\\\\=567500\ J[/tex]

A negative Gibbs free-energy value is an indication of a spontaneous reaction. This means that the reaction will occur without the need for any external energy input and will release energy that can be used to drive other processes. The correct answer is option c.

Gibbs free energy is a thermodynamic quantity that describes the amount of energy available to do work in a system. It takes into account both the enthalpy (heat) and entropy (disorder) of a system.

Therefore, a negative Gibbs free-energy value is an indication of a spontaneous reaction. Option c is the correct answer.

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No, his digestive system is breaking down starch molecules, but his respiratory system may not be working properly.

Oat starch which is mainly stored in the oat endosperm is the most abundant carbohydrate component of oats, and its content varies between 40-50% depending on the variety and growing conditions. Sayer and White 2011. Starch after extraction of oat amylose content lipids was determined by Gudmundson and Eliasson.

Whole grain oats contain large amounts of valuable nutrients such as protein starch unsaturated fatty acids, and dietary fiber in soluble and insoluble fractions. Starch is composed of two glucose polymers amylopectin, and amylose which together form insoluble semi-crystalline starch granules. Both polymers are composed of conjugated glucan chains connected by branch points, but their structure and biosynthesis differ.

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Answer:

pistil

Explanation:

Answer: I don't know try your best

Explanation:

Answer:

0.00244g/cm³ (3 s.f.)

Explanation:

The formula of density is [tex]\frac{mass}{volume}[/tex]. We already know the mass is 28.6kg, so we need to find the volume first before calculating the density.

Volume of board = 5.54 cm × 10.6 cm × 199 cm

                            = 11 700 cm³ (3 s.f.)

Density of board = [tex]\frac{28.6}{11 700}[/tex]

                            = 0.00244g/cm³ (3 s.f.)

Answer:

d = 0.0024 g/cm³

Explanation:

Given data:

Density of board = ?

Volume = 5.54 cm× 10.6 cm× 199 cm

Mass of board = 28.6 g

Solution:

Formula:

d = m/v

d = density

m = mass

v = volume

Volume = 5.54 cm× 10.6 cm× 199 cm = 11686.1 cm³

d = 28.6 g/ 11686.1 cm³

d = 0.0024 g/cm³

Answer:Put pic

Explanation:we cant answer if theres no details(pictures)

The lipid rafts are less fluid than the surrounding membrane at normal temperatures.

Cholesterol decreases the fluidity of the membrane at normal temperatures.

Lipid rafts regulate neurotransmission, receptor traffickinging and influence membrane fluidity.

For example, in phospholipid layer in cell membrane, there are hydrophilic heads (polar part of the layer) and hydrophobic tails (nonpolar part of the layer).

1) Small, non-polar molecules diffuse easily through this layer, no energy is required, this is passive transport.

2) Polar molecules cannot diffuse through phospholipid layer using passive transport, because hydrophobic tails does not allow that (polar molecules are reppeled), energy is required for that, this is active transport.

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Answer: I think you have to look in the textbook

Explanation:

it's impossible to answer without the stinking textbook

Answer:

Mercury

Explanation:

While it is true that most metals are solid at room temperature, mercury is liquid at room temperature hence mercury is often designated as the 'liquid metal'.

Thus, if i find a bottle on the shelf that has no solid in it, only liquid and i know that only pure metals are stored in that area of the laboratory, then i will quickly relabel it as mercury.

Answer:

In chemistry, a structural isomer (or constitutional isomer in the IUPAC nomenclature) of a compound is another compound whose molecule has the same number of atoms of each element, but with logically distinct bonds between them. The term metamer was formerly used for the same concept.

Explanation:

Foolow me amd if you think i am correct make me brainlist

The old age of rock when examined is 21.4 million years if the ratio of uranium-235 to lead-207 is found to be 125,000:875,000. the half-life of uranium-235 is 700 million years.

P = [P + D] (1/2) ^(t/t(1/2))

where,

P represent the present parent amount

D is the present daughter amount

t(1/2) is the half life time period

t is the actual age

We know that,

t = (log[(P+D) /P] / log2) × t(1/2) ----------(1)

Given,

P = 97.6

D = 2.1

Ratio of P and D can be calculated as

P/D = 97.6/2.1

= 46.476

By substituting all the values in eq(1), we get

t = [(log 46.476 +1)/log2] × t(1/2)

Given,

The half life of U —Pb decay is 700 million years.

So,

t = [(log 46.476 +1)/log2] × 700

t = 21.4 million years.

Thus, we calculated that the the old age of rock when examined is 21.4 million years.

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DISCLAIMER:

The given question is misprint on portal.

Here is the correct form of question:

A rock is examined to determine its age, and the ratio of uranium-235 to lead-207 is found to be 125,000:875,000. the half-life of uranium-235 is 700 million years.

How old is the rock if it contains Uranium-235/ lead-207 ratio of 97.6 to 2.1?

Answer:

There is only one stable atom that does not have neutrons. It is an isotope of the element hydrogen called protium. Protium, which contains a single proton and a single electron, is the simplest atom. All other stable atoms contain some number of neutrons. hope this helps you :)

Answer:

A molecule is an electrically neutral group of two or more atoms held together by chemical bonds. Molecules are distinguished from ions by their lack of electrical charge. hope this helps :)

Answer:

2LiO+2CL2

Explanation:

took the test

Answer:

It's A. 2LiCl + 3O2

Explanation:

Process of elimination babyyyyy

Answer:

option D generally higher

Answer:

Due to cis trans isomerism

Explanation:

Answer:

A 65-kg object and an 75-kg object.

Explanation:

The gravitational force is given by :

[tex]F=G\dfrac{m_1m_2}{r^2}[/tex]

F is directly proportional to the product of masses and inversely to the distance between them.

In this problem, the distance separating the objects is same for each pair. We need to find the greatest gravitational force between them.

(1) a 50-kg object and an 80-kg object

[tex]F_1=G\dfrac{4000}{r^2}\ N[/tex]

(2) a 65-kg object and an 65-kg object

[tex]F_2=G\dfrac{4225}{r^2}\ N[/tex]

(3) a 65-kg object and an 75-kg object

[tex]F_3=G\dfrac{4875}{r^2}\ N[/tex]

(4) a 60-kg object and an 70-kg object

[tex]F_4=G\dfrac{4200}{r^2}\ N[/tex]

From the above calculations we find that if the product of masses is maximum, it lead to maximum gravitational force between objects. Hence, a 65-kg object and an 75-kg object will have maximum gravitational force between them.

Answer:

i just ad the same question and but i fon know what ther answrr ied so i cant hep you but i had he smae question on rge mdhfyqf

Explanation:

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{7.1 \times {10}^{25} }{6.02 \times {10}^{23} } \\ = 117.940199...[/tex]

We have the final answer as

Hope this helps you

Answer:

Each magnet has a north and south end. Only opposite ends can attract, But if the ends are the same, they push away from each other. Magnets in some engines make it spin in a certain direction.

Answer:

In a Lewis symbol, the symbol for the element is used to represent the atom and its core electrons. Dots placed around the atom are used to indicate the valence electrons. ... In 1916, Gilbert Newton Lewis, an American chemist, suggested that molecules were formed when atoms shared pairs of outer electrons.

Explanation:

Lewis structures show the electrons in the valence shell of atoms in molecules.

Lewis structures are representations of molecules. They consist of the symbol of the element and the valence electrons in the atoms. The electrons are often shown as dots.

The atoms in molecules could be lone pairs or bond pairs. The bond pairs are shown as two dots on an atom. Since lone pairs are localized on an atom, they are shown as dots on the symbol of the atom that contain them.

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Answer:

-Acetone is a covalent compound, while sodium chloride is an ionic compound

-covalent compounds have weak attractions between molecules, resulting in low melting points

Explanation:

Answer:   A and C mah dudes

Explanation:   Edgy 2020   <3

Answer:

Remember, chemical reactions follow the law of conservation of mass. Chemical equations show this conservation, or equality, in terms of atoms. However, simply writing down the chemical formulas of reactants and products does not always result in equal numbers of atoms

Explanation:

Answer:

Yes

Explanation:

i think so as there are 2 h on the left