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Answer:

b. k+

Explanation:

Answer:

which one do u want help with?

Explanation:

Answer:

1.829 meters is the answer

Explanation:

Answer:

473 °C

Explanation:

The following data were obtained from the question:

Initial volume (V1) = 200 mL

Initial temperature (T1) = 100 °C

Final volume (V2) = 400 mL

Final temperature (T2) =..?

Next, we shall convert celsius temperature to Kelvin temperature. This can be obtained as follow:

T(K) = T (°C) + 273

Initial temperature (T1) = 100 °C

Initial temperature (T1) = 100 °C + 273 = 373 K

Next, we shall determine the final temperature of the water as follow:

Initial volume (V1) = 200 mL

Initial temperature (T1) = 373 K

Final volume (V2) = 400 mL

Final temperature (T2) =..?

V1/T1 = V2/T2

200/373 = 400/T2

Cross multiply

200 × T2 = 373 × 400

200 × T2 = 149200

Divide both side by 200

T2 = 149200/200

T2 = 746 K

Finally, we shall convert 746 K to celsius temperature. This is illustrated below:

T(°C) = T(K) – 273

T(K) = 746 K

T(°C) = 746 – 273

T(°C) = 473 °C

Therefore, the temperature of the second sample when it starts to boil is 473 °C

It is possible for a substance  to go directly from solid to gaseous state due to sublimation.

Sublimation is defined as a process in which transition  of a substance takes place  from solid to gas phase without passing through the intermediate liquid phase.

It is an endothermic process which occurs at temperatures and  pressure below the triple point. Reverse process of sublimation is deposition in which substances in gaseous phase directly go into solid phase.

It only refers to the change in state  and not for describing transformation  of substances. Sublimation requires an additional amount of energy and is an endothermic change proceeding with absorption of energy.

The enthalpy of sublimation is calculated by adding enthalpy of fusion and enthalpy of vaporization.

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The answer would be 20% (B)

Answer:

Quarter and half moons

Explanation:

Answer:

It's the elements atomic mass and the number of neutrons and protons in an atom.

Explanation:

Option C, slopes are same but y intercepts are different is the correct answer

Answer:

Explanation:

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

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

From the question we have

[tex]density = \frac{89.6}{10} \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

Chemical would be water splitting into just hydrogen and oxygen. Where as a physical change would be if it turned to ice.

Explanation:

Answer:

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Answer:

The answer is A

Explanation:

My teacher gave me the answer before the test that we took on 11/12/2020

Hope this helps anyone else who has the same question.

The halogens have similar properties, the correct option is A.

Halogens are the group 17th compound of the periodic table, It consists of elements like Fluorine(F), Chlorine(Cl), Bromine(Br), and Lodine(I).

The halogens have the following properties.

They all react with hydrogen to create acids.

All of them are fairly harmful.

Salts are easily formed when they react with metals.

Their outer shell contains seven valence electrons.

They are electronegative and very reactive.

Low melting and boiling points characterize the halogens. This is a common characteristic of non-metals.

As you move lower in the group, the melting and boiling points then rise.

The elements have different atomic mass, atomic radius, and a different number of protons.

They are grouped together because they all have similar properties.

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Answer:

Transition Metals are all of the elements kn group 3-12.

Answer:

D is your Answer just did the  quiz

( date on bottom when I did the quiz)

Explanation:

3 - 24 - 2021

Answer:

you need to calculate it by percentage

Answer:

mass = 20g

volume = 80ml =0.08 dm³

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

[tex]p = \frac{20g}{0.08 \:dm ^{3} } \\ p = 250gdm {}^{ - 3} [/tex]

Answer:

Gravity

Explanation:

Gravity is the pull of an object to another object like a human to the Earth. This is weight.

Answer:

C. Gravity

Explanation:

Just Took The Test And Got A Perfect Score. ;)

Answer:

See explanation

Explanation:

Oxide has a 2- charge.

Copper (I) Oxide = Cu2O

Copper (II) Oxide = CuO

The formula CuO can not be used to represent both copper I oxide and copper II oxide.

The formula of an ionic compound takes into account the oxidation state and valency of the the metal cation which is usually shown as a Roman numeral in the name of the compound.

For the compound copper I oxide, the correct representation of the compound is Cu2O. This shows that oxygen has a valency of 2 while copper has a valency of 1 in the compound.

The correct representation of copper II oxide is CuO. In the compound, both copper and oxygen have valency of 2.

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Answer:

5.88 × 10⁻⁷ m

Explanation:

Speed of Light = Wavelength times Frequency

c = λν

Step 1: Define

c = 3.0 × 10⁸ m/s

ν = 5.10 × 10¹⁴ Hz

λ = unknown

Step 2: Solve for λ

3.0 × 10⁸ m/s = 5.10 × 10¹⁴ Hz · λ

λ = 5.88235 × 10⁻⁷ m

Step 3: Simplify

We are given 3 sig figs.

5.88235 × 10⁻⁷ m ≈ 5.88 × 10⁻⁷ m

Answer:

0.8

Explanation:

since when you add them up you get 3.12 and divide it you get 0.78. Round and you will get 0.8

Answer:

CO

Explanation:

Co, Cr, and Cu are elements. Elements cannot be broken down by a chemical change, but compounds can. and CO is a compound

Answer:

co

Explanation:

Answer:

both conserve mass

Explanation:

Answer:

B.both conserve mass.

Answer:

Explanation:

Practical Applications of Sublimation

Sublimation and erosion cause ablation, a process that wears down glaciers. Sublimation of iodine may be used to reveal latent fingerprints on paper. Sublimation is used to purify compounds. ... Because dry ice sublimates so readily, the compound is used to produce fog effects.

The bands not straight around since location is not a factor in measuring temperature. Temperature seems to be not the same as the power of a thermodynamic process.

Temperature is a unit used to describe hotness or coldness. It may be stated in terms of any number of arbitrary scales and shows the direction in which heat energy would naturally flow, i.e., from a hotter body to a region of lower temperature (one at a lower temperature).

Temperature seems to be not the same as the power of a thermodynamic process; for instance, an iceberg has a significantly larger total heat energy than a match, despite the fact that a match is burning at a substantially higher temperature.  The bands not straight around since location is not a factor in measuring temperature.

Therefore,  the bands not straight around since location is not a factor in measuring temperature.

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Answer:

The Sun's energy is transferred as both light and heat energy, that raises the temperature of an area receiving the Sunlight. The increased temperature results in the evaporation of water from surfaces and water bodies, such that the mass of water vapor rises up into the atmosphere and condenses when it gets away from the ground heat to the cooler and higher altitudes

When there is a situation of low pressure, the wind blows into the low pressure, where, in the equator, comprises of high temperature air which could contain considerable amount of vapor from the neighboring water bodies, resulting in the eventual rise of very moist air, up into the atmosphere, that condenses at low temperature at the high altitudes, accumulate into larger masses of liquid water, and fall as rain

Explanation:

Answer:

aluminum (solid)

Explanation:

Solids have fixed shape and volume at room temperature.

Matter is defined as any substance that has weight and occupies space. There are three main classes of matter;

  Solids are particles have strong attractive force between them. This confers a fixed shape and volume on them.

 Liquids are mostly fluids that takes up the shape of containers they occupy. The have intermediate strength of attractive forces.

 Gases have weak forces and do not have fixed shape or volume. They take up the shape of any container they are introduced into.

Answer:

It helps you......

. Thank you ☺️☺️

Answer:

The indivisibility of an atom was proved wrong: an atom can be further subdivided into protons, neutrons and electrons...

hope this helps u

The Daltons atomic model gave the theory of chemical combination and the law of conservation of atoms. All matter is made of atoms is not disapproved. Thus, option A is correct.

Dalton’s atomic theory was given by John Dalton and involved several main points. According to the theory that matter has been composed of tiny atoms that are indestructible and indivisible.

It also stated about the mass, as atoms of various elements have different masses and the properties are shared by the atoms of the same element only. It gave rise to the law of conservation of mass, definite, and multiple proportions.

One of the laws is about matter being made of tiny particles called atoms. It has been not disproved by further investigation in any of the atomic models and theories.

Therefore, option A. the matter is made of atoms is not disproved.

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Answer:

Electrodes are the rods that carry the electric current to and from the electrolyte. These rods are usually inert, as in they do not react- usually graphite or platinum. The positive electrode is called the anode and the negative electrode is called the cathode.

Explanation:

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Electrodes in electrolysis that do not react are called inert electrodes.

Electrodes are conductors which carry current in and out of the electrolyte.

The negative electrode is the anode and the positive electrode is the cathode.

Inert electrodes do not react.

Electrodes in electrolysis that do not react are called inert electrodes.

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