I need helppppo it’s timeddddddddd

Answer:

Metallic element are conductors, because it shows north and south pole. Nonmetallic elements are generally non-conductors. Pure solidionic compounds are conductors, because they are found in solid state, but molten ionic compounds are conductors or non-conductors), because ionic component show property of metal.Pure molecular compounds are generally (conductors or non-conductors). A concentrated aqueous solution of a strong acid such as HCl is a (conductor ornon-conductor), because. As the concentration of the HCl solution decreases, the conductance increases), because Mixtures of metalsare non-conductors), because it doesn't show property of metal.

Metals and molten ionic substances and electrolyte solutions, conduct electricity.

The words that fill in the blanks are;

Metals are conductors because of the presence of free electrons in the metal which are available.

In an ionic solid, the ions are the charge carriers and they are bound up in the lattice making the ionic solid not to be a conductor.

In the molten state, the crystal collapses and the ions are released. Hence, the molten ionic substance is a conductor.

Solutions of electrolytes such as HCl conducts electricity due to mobile ions which are charge carriers in solution. As the concentration of the solution decreases, the number of ions in solution decreases and the conductivity of the solution decreases accordingly.

Mixtures of metals called alloys are still conductors of electricity due to the presence of free electrons.

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Answer:

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question

mass = 7 g

volume = 3.5 cm³

So we have

[tex]density = \frac{7}{3.5} \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

Explanation:

48 amu with only oxygen tells you that there are three oxygen atoms making up ozone.

Oxygen has an atomic mass of 16

48/16 = 3

Answer:

the melting point is 1431 degrees f or 777.2 c

Answer:

1,431° Fahrenheit or 777° Celsius

Answer:

B

Explanation:

Valence electrons are the number of electrons out the outermost shell of the diagram. In this diagram, there is one valence electron. This means that it is highly reactive since the shell is not complete and needs other elements to be able to complete the outermost shell. If this model had a full outermost shell, then it would not be reactive (noble gases).

In the Bohr model of an atom,  the element that this model represents is highly reactive because the model is showing only one valence electron.

To ascertain how reactive an element is, we have to look at its valence shell. In the Bohr model, electrons are arranged around the nucleus in shells.

If we look at the model shown, the valence (outermost) shell has only one electron which is easily lost.

This model corresponds to a highly reactive group 1 alkali metal.

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The empirical formula for the hydrogen crystal is CaBr2H3.

To calculate the formula for the hydrogen crystal, we need to determine the number of moles of each element present in the given substances (CaBr2 and H2O).

Let's start by calculating the number of moles of calcium bromide (CaBr2):

Molar mass of CaBr2 = (40.08 g/mol) + (2 * 79.90 g/mol) = 199.88 g/mol

Number of moles of CaBr2 = Mass of CaBr2 / Molar mass of CaBr2

= 7.58 g / 199.88 g/mol

≈ 0.0379 mol

Next, we calculate the number of moles of water (H2O):

Molar mass of H2O = (2 * 1.01 g/mol) + 16.00 g/mol = 18.02 g/mol

Number of moles of H2O = Mass of H2O / Molar mass of H2O

= 0.918 g / 18.02 g/mol

≈ 0.051 mol

Now, we need to determine the mole ratio between hydrogen (H) and the other elements in the crystal. Since hydrogen is present only in water, and the ratio of hydrogen to oxygen in water is 2:1, we can conclude that the number of moles of hydrogen is twice the number of moles of water:

Number of moles of hydrogen = 2 * Number of moles of H2O

≈ 2 * 0.051 mol

≈ 0.102 mol

To find the formula for the hydrogen crystal, we compare the number of moles of hydrogen (0.102 mol) to the number of moles of calcium bromide (0.0379 mol).

Since the number of moles of hydrogen is greater than the number of moles of calcium bromide, the simplest whole number ratio can be obtained by dividing both values by the number of moles of calcium bromide:

0.102 mol / 0.0379 mol ≈ 2.69

Rounding this value to the nearest whole number, we get:

2.69 ≈ 3

Therefore, the empirical formula for the hydrogen crystal is CaBr2H3.

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Answer:

D

Explanation:

knowing all factors is the best approach to understanding a certain subject.

It helps scientists to improve their experiments and interpret their data accurately. The consistency of the data with reality is referred to as data accuracy, which is the represents for data quality.

The consistency of the data with reality is referred to as data correctness, which is the fundamental criterion of data quality.

More precision equates to more conformity, thus correct data must reflect the facts you need.

This implies that the information is accurate and has a dependable, consistent source.

Peer review refers to the process of having the work examined by other scientists who assess the approach and look for any potential errors that could cast doubt on the results.

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Answer: 0.01645

Explanation:to long tosovles.

A Brainliest please

Good luck .

Answer:B: data verified by other studies

             C:data provided by an ice cream manufacturer

             E: data provided by an ice cream manufacturer

Answer:

the answer is A,B,E

Explanation:

edge 2022

Answer:

35.4451011

Explanation:

Answer:

A. Field

Explanation:

The lines of force are drawn around a magnet to illustrate the magnetic field of the magnet, so option A is correct.

In the body, force is the result of either a push or a pull. The three main categories of forces are friction, nuclear, and gravitational. For instance, when a hand strikes a wall, the hand puts force on the wall and the wall also exerts force on the hand. Newton was given a variety of laws to help him understand force.

The Newton is a physics unit of force that is a part of the International System (SI). A newton is the amount of force needed to move a body weighing one kilogram one meter per second.

The density of the field around a magnet is represented visually by magnetic field lines. The line drawn around the magnet to depict the direction of the field running from one pole to the next or between two magnets is called a magnetic field line.

Therefore, the lines of force are drawn around a magnet to illustrate the magnetic field of the magnet.

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Answer:

6.48 M

Explanation:

M₁V₁ = M₂V₂

Step 1: Define

Molarity₁ = 2.70 M

Volume₁ = 1.20 L

Molarity₂ = unknown

Volume₂ = 0.500 L

Step 2: Substitute and Evaluate for M₂

(2.70 M)(1.20 L) = (M₂)(0.500 L)

3.24 = (M₂)(0.500 L)

M₂ = 6.48 M

Answer:

Waste.

Explanation:

"A major environmental concern related to nuclear power is the creation of radioactive wastes such as uranium mill tailings, spent (used) reactor fuel, and other radioactive wastes. These materials can remain radioactive and dangerous to human health for thousands of years. Radioactive wastes are subject to special regulations that govern their handling, transportation, storage, and disposal to protect human health and the environment. The U.S. Nuclear Regulatory Commission (NRC) regulates the operation of nuclear power plants."

Answer:

55mL of sodium hydroxide are required.

Explanation:

Given data:

Molarity of NaOH solution = 6.00 M

Number of moles of NaOH = 0.330

Volume required = ?

Solution:

Formula:

M = n/v

M = molarity

n = number of moles

v = volume

Now we will put the values in formula.

6.00 M = 0.330 mol / v

v = 0.330 mol / 6.00 M

v = 0.055 L  (M = mol/L)

v = 0.055 L × 1000 mL/ 1L

v = 55 mL

55mL of sodium hydroxide are required.

Answer:

Explanation:

The equations in each option are confusing (repeated) but understandable

Balancing a chemical equation means the same number of individual and overall atoms on the reactant side is equal to the same number of individual and overall atoms on the product side. This is based on the law of conservation of matter which states that matter can neither be created nor destroyed, hence the no atom must be unaccounted for on any side.

The balancing of these equations seem to test the knowledge of a particular trick in balancing of equation - which will be highlighted as the equation is balanced

(a) To balance

SiO₂(s) + C(s) ⇒ Si(s) + CO(g)

The balanced equation will be

SiO₂(s) + 2C(s) ⇒ Si(s) + 2CO(g)

NOTE: The best way to address equations like this to balance the uniatomic element last.

(b) SiCl₄(l) + Mg(s) ⇒ Si(s) + MgCl₂(s)

The balanced equation will be

SiCl₄(l) + 2Mg(s) ⇒ Si(s) + 2MgCl₂(s)

NOTE: As noted earlier, the uniatomic  molecule should be balanced last

(c) To balance

Na₂SiF₆(s) + Na(s) ⇒ Si(s) + NaF(s)

The balanced equation will be

Na₂SiF₆(s) + 4Na(s) ⇒ Si(s) + 6NaF(s)

NOTE: As noted earlier, the uniatomic  molecule should be balanced last

Please, always sum the number of individual and overall atoms on both sides when you are done answering questions like this just to be sure.

Mass of products is exactly equal to mass of reactants. A mole-mole factor is a ratio of the moles for any two substances in an equation.

The law of mass of conservation states that the the mass of the reactant is exactly equal to the mass of the product.

According to this law, matter can be neither created nor be destroyed.  The mass of collection of objects never changes, no matter how the parts are rearranged.

To calculate the amount of atoms that are reacting, and they always be the same as the product because the law of conservation states that no matter can be formed or destroyed, as transferred.

Thus, the amount of reactants and products in a chemical reaction is calculated by the law of mass of conservation.

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Answer:

0.2moles

Explanation:

Given parameters:

 Number of molecules of H₂ = 1.8 x 10²³molecules

Unknown:

Number of moles of NH₃ = ?

Solution:

 The reaction equation is given as:

                 N₂  + 3H₂   →   2NH₃

   Let us solve from the known to the unknown specie;

 Since the number of molecules is 1.8 x 10²³molecules of H₂;

      6.02 x 10²³molecules will give 1 mole of a substance

      1.8 x 10²³molecules will produce  [tex]\frac{1.8 x 10^{23} }{6.02 x 10^{23} }[/tex] mole of H₂

                                                               = 0.3moles of H₂

From the balanced chemical equation;

                 3 moles of H₂ produced 2 moles of NH₃

                 0.3 moles of H₂ will yield [tex]\frac{0.3 x 2}{3}[/tex]   = 0.2moles

Answer:

its mineral composition

Explanation:

The atomic bonds within a mineral generally determine which wavelengths of light will be absorbed and which will be reflected. Those wavelengths that are reflected back to our eyes determine the color of the mineral. Some minerals have free electrons that will absorb certain wavelengths of light.

Mineral composition is the property of a rock that determines it's color.

A rock is a naturally occurring solid that comprises of different minerals or substances which fuses together or solidified together to form a very big solid mass.

Therefore, Mineral composition is the property of a rock that determines it's color.

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Answer:

every living thing

Explanation:

its right

Answer:

Everything is made up of cells

Explanation:

Humans, animals, plants, etc.

Answer:

structure of a muscle cell

Answer:b

Explanation:

Answer:

Ions are formed by the addition of electrons to, or the removal of electrons from, neutral atoms or molecules or other ions; by combination of ions with other particles; or by rupture of a covalent bond between two atoms in such a way that both of the electrons of the bond are left in association with one of the

Explanation:

hope this helps

Answer:

Ion, any atom or group of atoms that bears one or more positive or negative electrical charges. Positively charged ions are called cations; negatively charged ions, anions. Ions are formed by the addition of electrons to, or the removal of electrons from, neutral atoms or molecules or other ions; by combination of ions with other particles; or by rupture of a covalent bond between two atoms in such a way that both of the electrons of the bond are left in association with one of the formerly bonded atoms.

Explanation:

Examples of these processes include the reaction of a sodium atom with a chlorine atom to form a sodium cation and a chloride anion; the addition of a hydrogen cation to an ammonia molecule to form an ammonium cation; and the dissociation of a water molecule to form a hydrogen cation and a hydroxide anion.

Answer:

Reactions are given below.

Explanation:

Chemical equation:

CuCl₂ + NaOH     →    Cu(OH)₂ + NaCl

Balanced Chemical equation:

CuCl₂(aq) + 2NaOH(aq)     →    Cu(OH)₂(s) + 2NaCl(aq)

Ionic equation:

Cu²⁺(aq) + 2Cl⁻(aq) + 2Na⁺(aq) + 2OH⁻(aq) →  Cu(OH)₂(s) + 2Na⁺(aq) + 2Cl⁻ (aq)

Net ionic equation:

H⁺(aq) + OH⁻(aq) → H₂O(l)  

The Cl⁻(aq) and Na⁺ (aq) are spectator ions that's why these are not written in net ionic equation. The Cu(OH)₂ can not be splitted into ions because it is present in solid form.

Spectator ions:

These ions are same in both side of chemical reaction. These ions are cancel out. Their presence can not effect the equilibrium of reaction that's why these ions are omitted in net ionic equation.  

Answer:

Volume of water it can hold 63000,000 cm³

Mass of water is 63000,000 g.

Explanation:

Given data:

Length of tank  = 70.00 cm

Width of tank = 300.00 mm

Height of tank = 300.00 m

Volume of water it can hold  = ?

Mass of water = ?

Solution:

First of all we will convert the units into same unit.

Width of tank = 300.00 mm × 1 cm / 10 mm = 30 cm

Height of tank = 300.00 m× 100 cm / 1 m = 30000 cm

Volume of water it can hold:

V = l×w×h

V = 70.00 cm × 30 cm × 30000 cm

V = 63000,000 cm³

Mass of water:

Density of water from literature = 1 g/cm³

d = m/v

1 g/cm³ = m/ 63000,000 cm³

m = 63000,000 g

Answer:

Correct!

Explanation:

Answer:

See explanation and image attached

Explanation:

This reaction is known as mercuric ion catalyzed hydration of alkynes.

The first step in the reaction is attack of the mercuric ion on the carbon-carbon triple bond, a bridged intermediate is formed. This bridged intermediate is attacked by water molecule to give an organomercury enol. This undergoes keto-enol tautomerism, proton transfer to the keto group yields an oxonium ion, loss of the mercuric ion now gives equilibrium keto and enol forms of the compound. The keto form is favoured over the enol form.

Answer:

During the early Paleozoic Era, the Earth's surface was very different from what it is today. The continents were arranged differently, forming one large supercontinent called Pangea. This landmass was surrounded by a single large ocean called Panthalassa. The climate was much warmer and wetter than it is today, with no ice caps at the poles.

The first land plants, known as bryophytes, appeared during the early Silurian Period, around 430 million years ago. These plants were small and simple, lacking roots and vascular tissue. They grew in damp environments, such as along the edges of lakes and streams. They were important in the development of soils and in the colonization of land by other organisms, such as insects and other arthropods.