Heat rising in a hot-air balloon is an example of __________. conduction convection radiation solar

Answer:

16.3 g

Explanation:

got it right on ck

Answer: 42

Explanation: I took a quiz and had the same question.

Answer:

1350 g

Explanation: just add a 0

Answer:

2.41×10²³ molecules of water

Explanation:

Given data:

Mass of methane = 3 g

Molecules of water formed = ?

Solution:

Chemical equation:

CH₄ + 2O₂    →     CO₂  + 2H₂O

Number of moles of methane:

Number of moles = mass/ molar mass

Number of moles = 3 g/ 16 g/mol

Number of moles = 0.2 mol

Now we will compare the moles of water with methane.

               CH₄           :              2H₂O

                  1              :                  2

                0.2            :             2 × 0.2 = 0.4 mol

Molecules of water:

1 mole = 6.022×10²³ molecules of water

0.4 mol ×6.022×10²³ molecules of water / 1mol

2.41×10²³ molecules of water

Answer:

B. an object from which nothing, not even light, can escape

Explanation:

Answer:

C: was once buried underground

Explanation:

Hope this helps!

Answer:

The correct answer you are looking for is B i have got 100% on this test.

Explanation:

hop this helps! └(^o^)┘  ↖(^ω^)↗

Answer:

phosphoric acid H3PO4

The conjugate acid of H₂PO⁴⁻ is H₃PO₄. Therefore, option D is correct.

A conjugate acid is a species that is formed when a base accepts a proton (H⁺). It is the species that is one proton (H⁺) more acidic than the original base.

The base is the species that can accept a proton (H⁺), and the conjugate acid is the species that is formed when the base accepts the proton. The conjugate acid has one additional proton compared to the base.

Conjugate acids play an important role in acid-base reactions as they are formed when bases accept protons, and they can donate protons in subsequent reactions to regenerate the original base.

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Answer:

It is like an arch because it bends horizontal just like we do and the legs of the arch support the stone like our feet and legs support the weight of us.

Explanation:

I beleive it would be 0.8

the volume of water alone is 4.8

the volume of rock and water is 5.6

you would subtract them both to find the volume of the Rock.

Answer:

If we know the force of an object in Newtons) and we know how fast the object accelerates in ms"), then we can easily find the mass of the object by

dividing the force by the mass

Answer:

No, it looks like there is no gas forming no foaming or burning so it is not

Explanation:

Answer:

One s orbital and One p orbital

Explanation:

To get an approximate result, multiply the mass value by 454.

hope this help!

A I think thats what I would put

Answer: Acceleration is when something accels.

Or, in simple terms, when the velocity changes rapidly to a very quick speed.

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Best of Regards!

Answer:

Fireworks is exothermic

Endothermic is Cookies

Explanation:

Exothermic reactions transfer energy to the surroundings and the temperature of the surroundings increases. Endothermic reactions take in energy and the temperature of the surroundings decreases.

Hope this helps

Answer:

nucleus

Alpha particles are subatomic fragments consisting of two neutrons and two protons. Alpha radiation occurs when the nucleus of an atom becomes unstable (the ratio of neutrons to protons is too low) and alpha particles are emitted to restore balance.

Explanation:

Answer:

Explanation:

Gravity is what holds the planets in orbit around the sun and what keeps the moon in orbit around Earth. ... Gravity creates stars and planets by pulling together the material from which they are made. Gravity not only pulls on mass but also on light.

Volume of O₂ = 1.12 L

The reaction equation is the chemical formula of reagents and product substances  

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products  

Reaction

4Na+O₂ ⇒ 2Na₂O

Ar Na = 23 g/mol

[tex]\tt mol=\dfrac{4.6}{23}=0.2[/tex]

[tex]\tt \dfrac{1}{4}\times 0.2=0.05[/tex]

Assume at STP (0 C, 1 atm), 22.4 L for 1 mol , then volume of O₂ :

[tex]\tt 0.05\times 22.4=1.12~L[/tex]

Answer:

Prokaryotes (which are bacteria and archea)

Eukaryotes (which is plants, animals, protists and fungii)

If you could magically make two neutrons in the nucleus of an atom disappear, the atomic number and the electrical charge of that atom would remain unchanged. Neutrons do not carry an electrical charge so adding or removing them from the nucleus does not change the electrical charge of the nucleus. It does, however, change the mass of the nucleus. Adding or removing neutrons from the nucleus are how isotopes are created.

Protons carry a positive electrical charge and they alone determine the charge of the nucleus. Adding or removing protons from the nucleus changes the charge of the nucleus and changes that atom's atomic number. So, adding or removing protons from the nucleus changes what element that atom is! For example, adding a proton to the nucleus of an atom of hydrogen creates an atom of helium. (Actually, a few neutrons have to be added as well to make the new nucleus stable, but the end result is still helium.) Keep in mind that atoms, by definition, are electrically neutral and always contain the same number of protons and electrons.

Answer:

Explanation:

The distance covered by an object given it's velocity and time taken can be found by using the formula

From the question

velocity = 35.0 mi/hr

time = 2455 s = 0.68 hr

We have

distance = 35 × 0.68

We have the final answer as

Hope this helps you

Answer:

separate soluble solids from liquid

Explanation:

A in Chemistry

Crystallization is a separation technique used to separate solute solids from a liquid solvent.

Crystallization is the process of disuniting or separating two substances or molecules that are mixed, and are of different forms of matter. Such as solid and liquid. The process separates mixtures by three processes. These processes are freezing, precipitation, and deposition.

It is the main process of separating solid from liquid. In this process, the solute came above the liquid in crystal form and this is called precipitation.  

Freezing separates the substance that has a different freezing point.  By deposition, the substance that is solid and called solute is deposited below the liquid in the container.    

Thus, crystallization separates the solute solids from a liquid solvent.

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