answer correct
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Density = Mass/Volume but it can also be rearranged to:

Mass = Volume x Density

Given in the question:

Volume - 240 cm3

Density - 15 g/cm3

Calculation

Mass = Volume x Density

= 240 x 15

= 3600g

Therefore, the mass of the box is 3600g so the answer is C.

Answer:It is always greater than the actual mechanical advantage because all machines must overcome friction. The mechanical advantage of a machine may be greater than, less than, or equal to 1, depending on the type of machine.

Answer:

no

Explanation:

trust me i got it right on my test

Lithium oxide ever be a liquid on any of the planet's or moon in our system - No.

Lithium oxide is an inorganic compound with the chemical formula Li₂O, and it present in white solid form.

Lithium oxide is a strong base and on reacting with water will form lithium hydroxide. In this Lithium oxide compound atrong ionic bonds is present with great attraction force. Melting point of Lithium oxide is 1,438 degree celsius and no planet and moon have this much of temperature.

So, it is not possible to get liquid Lithium oxide in our system.

Hence, answer is NO.

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1) elements are composed of atoms, which are the tiny building blocks that compose matter.

2) Atoms resemble a solar system: the sun being the nucleus (protons and neutrons) and the electrons being the planets that orbit the nucleus.

3) Mostly everything (food, electronics, animals, plants, air)

4) The # of protons in the element

5) The same elements that were forged by stars are also present in us

Answer:

As water is boiled, kinetic energy causes the hydrogen bonds to break completely and allows water molecules to escape into the air as gas (steam or water vapor). When water freezes, water molecules form a crystalline structure maintained by hydrogen bonding.

Explanation:

Answer:

water

Explanation:

you can go longer without food than you can with water.

The number of moles in 25 grams of oxygen is equal to 1.56 moles, as 16 grams of oxygen contain one mole.

A mole is a unit measurement that is used to calculate a large number of chemical entities such as atoms, molecules, ions, or other particular particles.

The mass of the one mole of any chemical element in the periodic table is called atomic mass and that of any compound is known as molar mass.

The number of chemical entities present in one mole was found to be equal to approximately 6.023 × 10 ²³ which is known as Avogadro’s number. In the calculation of the number of moles of a substance the given mass of the substance is divided by its molecular mass.

Given, the mass of the oxygen = 25 grams

As we know the atomic mass of oxygen is equal to 16g/mol

So 16 g of oxygen contains moles = 1

Then 25 g of oxygen will contain moles = 25/16 = 1.56 mol

Therefore, the moles of oxygen in 25 grams are equal to 1.56.

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Answer:

[tex]p2 = 0.175atm[/tex]

Answer:

I believe 83.33 mL is needed. :)

Answer:

Thus, when 2.5 mol of oxygen reacted with hydrogen, 2 * 2.5 mol = 5 so its A

Since Russia and the U.S.A have discovered new features on planets using spacecraft in modern times, this is an example of: C. how contributions by many different cultures throughout history have advanced our understanding of the solar system.

A solar system can be defined as a collection of the outer and inner astronomical or planetary bodies (planets) alongside the Moon that are in orbit around the Sun, in slightly elliptical orbits.  

Culture simply refers to the general way of life of people in a specific society or geographical area. This ultimately implies that, culture is a terminology which can be used to describe a sum total of the norms, beliefs, clothes, language, foods, and behaviors which a group of people that are living in a geographical area share in common.

In this context, we can reasonably infer and logically deduce that contributions by various cultures around the world have helped us to advance our understanding of the solar system.

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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 of gold bar = 34.5 g

volume = 17 mL

We have

[tex]density = \frac{34.5}{17} \\ = 2.02941176...[/tex]

We have the final answer as

Hope this helps you

The kinetic molecular theory is a classical model that explained the movement of gas particles. It started about constant motion and collision, and the relation of KE with temperature.

The Kinetic molecular theory was given by several scientists including Rudolf Clausius, Boltzman, Avogadro, and Graham. It stated several principles based on observations and experiments.

It stated that matter is composed of particles that are constantly in motion and have been known to show the constant perfect elastic collision due to the addition or removal of energy.

The kinetic energy of the particles is directly proportional to the temperature of the ideal gas condition and is involved in changes in the state of matter. Higher temperature exhibits more collisions.

Therefore, the Kinetic molecular theory stated about the particles, motion, collision, temperature, etc.

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Answer:

Compound

Explanation:

Compounds consists of atoms of two or more different elements that are chemically bonded together.

Answer:

D

Explanation:

In the problem above it is

q = mass x heat fusion

q = 10 g x 334 J/g = 3340 J. Since the ice is absorbing heat it is + 334 J.

Answer:

3.34 kJ

Explanation:

took the test

Answer:

the boiling point of HF is higher than H2 and F2

Explanation:

it is because inter molecular give is present in HF because of the Hydrogen bond present. Hydrogen bond is strong and will require much energy to break ,since no hydrogen bond is in the rest H2 and F2 has a low boiling point

The boiling point of a liquid depends upon the pressure of the surrounding. Here HF has higher boiling than the molecule of hydrogen and fluorine due to the presence of hydrogen bonding between 'H' and 'F' atoms.

The temperature at which the vapor pressure of the liquid becomes equal to the atmospheric pressure of the liquid's environment is defined as the boiling point. A t this temperature, the liquid is converted into a vapour.

The intermolecular forces can be used to predict the relative boiling points. If stronger is the intermolecular force, the lower is the vapor pressure of the substance and the higher is the boiling point.

The order of intermolecular forces are:

H - bonding > dipole-dipole > London dispersion (Van der Waals)

Here HF has intermolecular hydrogen bonding which is not present in H₂ and F₂ and has high boiling point.

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Answer:

The pelvic bones of whales are one of the classic examples of a vestigial structure. In most animals, the pelvic bones are needed to be able to move the lower or rear set of limbs for the purpose of locomotion.

Answer:

Explanation:

T1 = 25C = 298.15 K

P1 = 2.0 atm

V1 = 1.00 L

T2 = 125C = 398.15 K

P2 = 12.0 atm

V2 = ?

P1V1/T1 = P2V2/T2 must be changed to T2P1V1/T1/P2

398.15 x 2.0 x 1.00 ÷ 298.15 ÷ 12.0 = V2

So 0.223 L is the answer!!

Answer: There is gas produced.

Explanation:

After waking up one morning the smell of bacon was noticed. This was made possible due to the gas produce from the chemical reaction taking place during the process of making the bacon.

This gases are produced from the cooking of the bacon ( meat ), on the fire using cooking oil and all other ingredients.

A reagent that could be added to a mixture of [tex]Ag^+[/tex] and [tex]Cu^{2+}[/tex] to separate this two species is hydrochloric acid (HCl).

A separation technique can be defined as a technique that is used to separate (convert) two or more mixture and solution of chemical substances into distinct products such as solutes, chemical compounds or elements.

In this scenario, a reagent that could be added to a mixture of [tex]Ag^+[/tex] and [tex]Cu^{2+}[/tex] to separate this two species is hydrochloric acid (HCl). As HCl is added to this mixture, a white precipitate would be formed by silver ions ([tex]Ag^+[/tex]) while the copper ion ([tex]Cu^{2+}[/tex]) would form a maroon precipitate.

In conclusion, the above confirmation test should be done when hydrochloric acid (HCl) is added to a mixture of [tex]Ag^+[/tex] and [tex]Cu^{2+}[/tex] as a reagent.

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Answer:

Boron and/or Polonium

Explanation:

In the periodic table, you can see a stair-stepped line starting at Boron (B), atomic number 5, and going all the way down to Polonium (Po), atomic number 84. Except for Germanium (Ge) and Antimony (Sb), all the elements to the left of that line can be classified as metals.

Answer:

decreases

i think so

byeeee

The series along which the bond angle is increasing is: C. H2O NH3 CH4.

Bond angle refers to the geometric angle that actually exists between angles that are adjacent to each other. It is also known to be the angle that is formed by three contiguous atoms.

We can see that as we move from H2O to NH3 then to CH4, the bond angle increases.

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Answer:

Your answer I believe will be C. To determine the probability that an offspring would have a specific trait.