A cube of zinc at 15.C is placed in contact with a cube of tin at 45. Which statement describes the initial flow of heat between the cubes? *

Answer:

GROUP 2

Explanation:

u asked this already

i just dont understand...

Answer:

The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles H2O2, or 34.01468 grams.

Explanation:

The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles H2O2, or 34.01468 grams.

Answer:7.00 moles of H2O2

Explanation:

Answer:atomic mass, neutrons in the nucleus

Explanation: because I remember from when I took honors chemistry last year we learned about this and it’s called the atomic mass when looking at an atom and the neutrons in the nucleus are effected by it.

Answer:

4. particles of matter

Answer:

The basic unit of a chemical element. The answer is 4 particles of matter.

Explanation:

A distilled water is the correct anwser

Answer:

wave speed

Explanation:

A wave is a disturbance that transmits energy from one place to another without the actual displacement of the particles of the medium.

To find the wave speed we need to determine the product of its frequency and wavelength.

  Wave speed  = Frequency x wavelength

Frequency of wave is the number of wave that passes through a point at a unit time.

Wavelength is the displacement of a complete wave train.

Answer:

Number of moles = 0.5 mol

3.011 ×10²³ atoms

Explanation:

Given data:

Mass of sulfur = 16 g

Number of moles = ?

Number of atoms = ?

Solution:

Number of moles of S:

Number of moles = mass/molar mass

Number of moles = 16 g/ 32 g/mol

Number of moles = 0.5 mol

Number of atoms:

1 mole contain 6.022×10²³ atoms

0.5 mol × 6.022×10²³ atoms / 1 mol

3.011 ×10²³ atoms

Answer:

its B

Explanation:

not so sure but its reasonable for me

Answer:

B

Explanation:

Hail form as water droplets freeze to form chunks or balls of ice

Please give me Brainliest as I provided an explanation

Answer:

Wire.

Explanation:

The wire has movable electrons, which moves the charge and the electricity around.

Battery provides the electricity by electrical potential energy, not transport it.

The switch toggles between an open circuit and a closed one, where only the closed one has a full loop of wire to transport electricity.

And the light bulb uses electricity.

Hope this helped!

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{2.4 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 3.986710...[/tex]

We have the final answer as

Hope this helps you

The number of moles of SO₃ contained in this chemical compound with the given number of elementary entities (2.4 × 10²⁴) is equal to: C. 4.0.

In Chemistry, the number of moles of SO₃ contained in this chemical compound with the given number of elementary entities, we would use the following formula:

n = N/NA

where:

Scientific data:

Substituting the given parameters into the formula, we have;

n = 2.4 × 10²⁴/6.02 × 10²³

n = 3.99 ≈ 4.0 moles.

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Answer: 310K

Explanation: I got it right

Answer:

310 k

Explanation:

Hope this helps

Answer:

Is there a picture if so I can't see it

Answer:

Third option.

Explanation:

when the balloon is rising to high altitudes, the air pressure decreases. so the helium in the balloon increases and expands the balloon.

hope this helps :)

Answer:

Sel palisade terdapat di daun dan fungsi utamanya adalah penyerapan cahaya sehingga fotosintesis dapat berlangsung.

Explanation:

Answer:

- ionic bond - covalent bond

- electrons - transfer

- share - electronegativity

- strong - electronegativity difference

Explanation:

The chemical bond that forms between oxygen & titanium be covalent bond.

A covalent bond is a chemical bond that involves the sharing of electrons to form electron pairs between atoms.

These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding.

Titanium dioxide is a covalent compound in which the titanium atom is bonded to each oxygen through double bonds.

It consists of covalent bonds, with titanium is in a +4 oxidation state. Therefore, titanium dioxide is a covalent compound.

Learn more about Bonding here ;

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Answer:

My celebrity crush is young Keanu Reeves and my favorite drink is matcha tea

Explanation:

Answer: I don't really have a celeb crush but my favorite drink is Mango Slushie with boba.

Explanation:

Answer:

false

Explanation:

because elements never exist in nature as single isotopes they are always combined

Answer:

FALSE

Explanation:

in the cases of three elements (tellurium, indium, and rhenium) the most abundant isotope found in nature is actually one (or two) extremely long-lived radioisotope(s) of the element, despite these elements having one or more stable isotopes.

Answer:In chemistry, a metal is an element that readily forms positive ions (cations) and has metallic bonds. Metals are sometimes described as a lattice of positive ions surrounded by a cloud of delocalized electrons. ... The traditional definition focuses on the bulk properties of metals.

Explanation:

Answer:

metal is a type of element to be percise M.O in the element periodic table

Explanation:

ur welcome

Explanation:

neutralization is a chemical reaction in which acid and a base react equal with each other.

Answer:

Explanation:

A neutralization reaction is when an acid and a base react to form water and a salt

Hope it helps

Answer: 1.8 million years ago

Explanation:

Answer:

In acetic acid, due to the +I effect of the alkyl group the electron density on the oxygen atom increases.

The release of H + ion becomes difficult. Thus , greater the magnitude of +I effect weaker will be the acid.

Order of +I effect : CH 3>H

Therefore , formic acid (HCOOH) is more acidic than acetic acid (CH 3COOH).

Gold

Gold is the most malleable and ductile of all known metals. A single ounce of gold can be beaten into a sheet measuring roughly 5 meters on a side.

Answer:Re3(PO4)2 I think I'm wrong

Explanation:

Answer:

Final volume = V₂ =  8.2L

Explanation:

Given data:

Initial volume = 12.3 L

Initial pressure = 40.0 mmHg

Final volume = ?

Final pressure = 60.0 mmHg

Solution:

The given problem will be solved through the Boyle's law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume  

Now we will put the values in formula,

P₁V₁ = P₂V₂

40.0 mmHg × 12.3 L = 60.0 mmHg × V₂

V₂ = 40.0 mmHg × 12.3 L / 60.0 mmHg

V₂ =  492 mmHg. L /  60.0 mmHg

V₂ =  8.2L

Answer:

E =  0.024 ×10⁻¹⁷ J

Explanation:

Given data:

Wavelength of photon = 821 nm (821 ×10⁻⁹ m)

Energy of photon = ?

Solution:

Formula:

E = hc/λ

h = plancks constant = 6.626×10⁻³⁴ Js

c = speed of light = 3×10⁸ m/s

by putting values

E = 6.626×10⁻³⁴ Js × 3×10⁸ m/s / 821 ×10⁻⁹ m

E = 19.878×10⁻²⁶ J.m/ 821 ×10⁻⁹ m

E =  0.024 ×10⁻¹⁷ J