From the information in the graph and the given list
of numbers, complete the sentence about the
normal melting and boiling point of Q. Numbers
should be used only once or not at all.
60
65
70
120
150
At standard pressure, the melting temperature of Q
IS
°C and the boiling temperature is
C

Answer

Energy level VI

Explanation

Energy levels which is also called electron shells are fixed distances from the nucleus of an atom where electrons may be found. Electrons are tiny, negatively charged particles in an atom that move around the positive nucleus at the center.

Therefore, when the electron of an atom is in the n = 6 level, this means the electron is in the energy level VI.

Mole present in 85 grams of calcium is 2.12 moles

It is given that

given mass of calcium = 85 grams

molar mass of calcium = 40 grams

We have to find the moles

The mole is the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon 12, its symbol is “mol”

moles = given mass/molar mass

moles = 85 gram/40 gram

moles = 2.12

Hence, moles in 85 grams of calcium is 2.12 moles

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Answer:

0.694 cents per second

Explanation:

25x100=2500 cents per hour, 2500/60 = 41.67 per minute and 41.67/60=0.694 cents per second

This net ionic equation, including phases, represents the reaction of Fe(NO₃)₂(aq) and Na₂CO₃(aq) to form FeCO₃(s) and 2NaNO₃(aq).

The net ionic equation, including phases, for the reaction:
Fe(NO₃)₂(aq) + Na₂CO₃(aq) ⇒ FeCO₃(s) + 2NaNO₃(aq)
First, we break down the reactants and products into their respective ions:
Fe²⁺(aq) + 2NO₃⁻(aq) + 2Na⁺(aq) + CO₃²⁻(aq) ⇒ FeCO₃(s) + 2Na⁺(aq) + 2NO₃⁻(aq)
Now, we can remove the spectator ions that do not participate in the reaction, which are 2Na⁺(aq) and 2NO₃⁻(aq). This gives us the net ionic equation:
Fe²⁺(aq) + CO₃²⁻(aq) ⇒ FeCO₃(s)

The entire symbols of the reactants and products, as well as the states of matter under the conditions under which the reaction is occurring, are written in the complete equation of a chemical reaction.

Only those chemical species that actively contribute to a chemical reaction are listed in the net ionic equation for that reaction. In the net ion equation, mass and charge must be equal.

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Answer:

In a chemical change the nature of the substance changes and it is transformed, for example when a piece of wood is burned, the carbon is being transformed into carbon dioxide. A physical change is one where the nature of matter does not vary.

I hpoe help you.

Answer:

physical changes only change the appearance of a substance not it's chemical composition .chemical changes change the substance with a new chemical formula

Explanation:

Out of the three compounds, methyl salicylate would be expected to be the most soluble in water.

a. Salicylic acid: It is relatively less soluble in cold water, but its solubility increases in hot water. However, it's still not as soluble as methyl salicylate.

b. Acetylsalicylic acid: It has low solubility in both cold and hot water compared to the other two compounds.

c. Methyl salicylate: This compound has the highest solubility in both cold and hot water among the given compounds.

So, based on solubility in both hot and cold water, methyl salicylate (c) is the most soluble compound among the three options.

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Answer:

The purpose of a hypothesis is to find the answer to a question. A formalized hypothesis will force you to think about what results you should look for in an experiment.

Explanation:

Hope this is helpful to you!

Answer:

reaction

Explanation:

elements react to form products

The average speed of a glider and the force a magnet produces are not directly proportional. A glider's speed is influenced by a number of variables, such as its design and the means of propulsion.

According to Newton's second law, a force is equal to an object's mass times its acceleration. The acceleration of the glider was decreased by altering its mass. The acceleration increased as the force applied to the glider grew, proving Newton's second law.

The object is not under any net forces. The forces balance out if the object is moving at a steady speed because it isn't accelerating. Only if a net force other than zero applies on the glider will it experience a change in speed.

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Answer:

A battery is a device that stores chemical energy and converts it to electrical energy. The chemical reactions in a battery involve the flow of electrons from one material (electrode) to another, through an external circuit. The flow of electrons provides an electric current that can be used to do work.

Explanation:

Answer:

D. weight

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If a solid object is taken from Earth far into space, which of the following measurements of the object will change the most?

A. density

B. mass

C. volume

D. weight

option D. weight

Because the gravity of the planet/object changes, the weight of the object changes when you move it away from the earth or place it on another planet.

However, the mass of the object remains the same regardless of whether it is on Earth or outer space.

How many moles of tungsten atoms are in 4.8 * 10^25 atoms of tungsten?

Avogadro's number is the number of particles that we have in one mol of particles. It is 6.022 *10^23. For example: in 1 mol of atoms there are 6.022*10^23 atoms.

It's like a dozen. When we say a dozen atoms, we mean 12 atoms. So, when we say a mol of tungsten atoms, we mean 6.022 *10^23 atoms of tungsten.

1 mol of atoms of tungsten = 6.022 *10^23 atoms of tungsten

We will use that relationship to find the number of moles of tungsten atoms that we have in 4.8 *10^25 atoms of tungsten.

number of moles of tungsten atoms = 4.8 *10^25 atoms * 1 mol of atoms/(6.022 *10^23 atoms)

number of moles of tungsten atoms = 79.7 moles = 8 *10^1 moles

number of moles of tunsten atoms = 8.10^1 moles

Answer: b) 8*10¹ moles

When the particles of substance we need to increase its temperature by 20°C are compared to the particles of a substance we need to increase the temperature by 50°C, it can be observed that the particles we need to increase the temperature by 20°C have less kinetic energy than the particles we need to increase the temperature by 50°C.

Particles in a solid, liquid, or gas move more quickly as their temperature rises, hence, their kinetic energy increases.

The kinetic energy of molecules diminishes when the temperature drops because molecules' vibrations are reduced as well.

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The resulting empirical formula is Na2CrO4.

The empirical formula of a compound is the simplest whole-number ratio of the elements it contains. To calculate the empirical formula, we must first determine the molar ratio of the elements by dividing their masses by their respective molar masses.

For sodium, the molar mass is 22.99 g/mol. Therefore, the molar ratio of sodium is 29.84 g / 22.99 g/mol = 1.30 mol.
For chromium, the molar mass is 51.99 g/mol. Therefore, the molar ratio of chromium is 39.7 g / 51.99 g/mol = 0.76 mol.
For oxygen, the molar mass is 16.00 g/mol. Therefore, the molar ratio of oxygen is 72.67 g / 16.00 g/mol = 4.54 mol.
To get the empirical formula, we must divide each of the molar ratios by the smallest molar ratio, which in this case is 0.76 (for chromium). The resulting empirical formula is Na2CrO4.

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Answer:

24g of NaOH are required

Explanation:

Molarity, M, is an unit of concentration widely used in chemistry defined as the ratio between moles of solute (In this case, NaOH), and volume of solution in liters.

We can find the moles of NaOH and its mass with the volume and desired concentration as follows:

Moles NaOH:

400.0mL = 0.400L * (1.50mol / L) = 0.600 moles NaOH

Mass NaOH -Molar mass: 40.0g/mol-:

0.600 moles * (40.0g / mol) =

Answer:

The greenhouse effect is a phenomenon of radiative transfer, the process by which the energy of light waves is exchanged in matter. Radiative transfer dictates what energy is reflected, absorbed, and emitted. The greenhouse effect: A summary of the heat transfer in the Earth's atmosphere

Explanation:

trust me i have a huge brain and access to the internet

The pressure in the cοntainer, when all οf the methanοl is vapοrized, is apprοximately 850.44 tοrr.

Tο calculate the pressure in the cοntainer using the ideal gas law, we can use the fοrmula:

PV = nRT

Where:

P is the pressure

V is the vοlume

n is the number οf mοles

R is the ideal gas cοnstant (0.0821 L·atm/(mοl·K) οr 62.36 L·tοrr/(mοl·K))

T is the temperature in Kelvin

First, let's cοnvert the given temperature frοm Celsius tο Kelvin:

T = 30°C + 273.15 = 303.15 K

Next, we need tο determine the number οf mοles οf methanοl. We can use the mοlar mass οf methanοl (CH₃OH) tο calculate this:

Mοlar mass οf CH₃OH = 12.01 g/mοl (C) + 1.01 g/mοl (H) + 16.00 g/mοl (O) + 1.01 g/mοl (H) = 32.04 g/mοl

Number οf mοles = Mass / Mοlar mass

Number οf mοles = 1.50 g / 32.04 g/mοl = 0.0468 mοl

Nοw we can substitute the values intο the ideal gas law equatiοn tο calculate the pressure:

P * 1.00 L = 0.0468 mοl * 0.0821 L·atm/(mοl·K) * 303.15 K

Sοlving fοr P:

P = (0.0468 mοl * 0.0821 L·atm/(mοl·K) * 303.15 K) / 1.00 L

P = 1.119 atm

Finally, we can cοnvert the pressure tο tοrr by using the cοnversiοn factοr:

1 atm = 760 tοrr

P = 1.119 atm * 760 tοrr/atm

P = 850.44 tοrr

Therefοre, the pressure in the cοntainer, when all οf the methanοl is vapοrized, is apprοximately 850.44 tοrr.

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Answer:

Bro its expired milk duh

Explanation:

Answer:

It is an Ionic bond

Answer:

1dg = 10g

1000dg = (1000×10)g

= 1000grams

Explanation:

hope that will help you

Answer:

I found:

ν=6×10^14Hz

Explanation:

You can consider that wavelength λ and frequency ν are related through the speed of light in vacuum c as:

c = λ ⋅ ν

so:

3 * 10⁸ = 4.9 * 10-⁷ * V

v =3 *10⁸/ 4.9 *10⁻⁷ = 6 * 10¹⁴HZ

The visible light's wavelengths are: 380–450 nm for violet (688–789 THz frequency) 450–495 nm for blue. Green: nm 495–570. Yellow: nm 570–590.

Make a conversion from wavelength to meters. Divide the wavelength in m by the speed of light, which is 300,000,000 m/s. You can now determine the wave's frequency.

What frequency exists in green light, whose wavelength is 4.90 x 10?

v=6×10^14Hz

Therefore,

Consider how the relationship between wavelength and frequency and the speed of light in a vacuum, c, looks like this:

c = λ ⋅ ν

so:

3 * 10⁸ = 4.9 * 10-⁷ * V

v =3 *10⁸/ 4.9 *10⁻⁷ = 6 * 10¹⁴HZ.

The color that visible light appears in depends on its wavelength. The color of light with the longest wavelength is red, whereas the color with the shortest wavelength is violet. The wavelengths of all the other colours of light are in between. Visible light is divided into its several colours using a prism.

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Answer: Its A. thermal energy will move from water bottle to ice.

Explanation:

The ring structure of carbohydrates is a Haworth structure however it also forms a Hemi-acetal structure and an Open chain structure.

Carbon, hydrogen, and oxygen make up the for the components in Carbohydrates. Therefore, the general empirical structure for carbohydrates is (CH₂O)ₙ

Haworth structure is the presence of the pyranose ring structure. It involves the rotation of the Fischer structure which makes it so that the beginning of the molecule which is the carbonyl group oxygen is connected to the carbon atom which is then located before the last carbon atom and by this closing the ring and a cyclic structure is formed.

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Answer: Magnet

Explanation:Using a magnet is the best separating technique to be deployed in this case. The nails are easily picked out by just holding a magnet over the sandbox.

The proton number has the highest value in the ion

In an atomic element Q, the mass number is the number of the proton and the neutron, the electron encircles around the nucleus of the atomic element.

Recall that:

∴

The atomic element Q+ has a positively charged ion, Thus, the proton number in the mass of the atomic element Q, therefore, has the highest value in the ion.

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Ariana is playing basketball with her friends. They are using an orange basketball. Because all visible light waves except orange are absorbed by the ball.

The correct answer is A.

The correct answer is A.

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Answer: Frost weathering is a collective term for several mechanical weathering processes induced by stresses created by the freezing of water into ice.

Answer:

It's Insulators

For proof you can search on the internet