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Answer:

Mechanical, thermal,chemical

Explanation:

Answer:

chemical, temperature, pressure, and light

Explanation:

Answer:

59.52g/mol

Explanation:

This question can be answered using the formula;

PV = nRT

Where;

P = pressure (atm)

V = volume (L)

R = gas constant (0.0821 Latm/molK)

T = temperature (K)

From the information provided:

P = 190mmHg = 190/760 = 0.25atm

V = 1000ml = 1000/1000 = 1L

n = number of moles = ?

T = 91°C = 91 + 273.15 = 364.15K

PV = nRT

0.25 × 1 = n × 0.0821 × 364.15

0.25 = 29.8967n

n = 0.25/29.8967

n = 0.0084mol

Mole = mass/molar mass

Molar mass = mass/mole

Molar mass = 0.50/0.0084

Molar mass = 59.5238

Hence, the molecular mass of the liquid is 59.52g/mol

Answer:

24 mol Cu

General Formulas and Concepts:

Chemistry

Explanation:

Step 1: Define

RxN: 2Cu (s) + O₂ (g) → 2CuO (s)

Given: 12 moles O₂

Step 2: Stoichiometry

[tex]12 \ mol \ O_2(\frac{2 \ mol \ Cu}{1 \ mol \ O_2} )[/tex] = 24 mol Cu

Step 3: Check

We are given 2 sig figs.

Our final answer is in 2 sig figs, so no need to round.

The concentration of ethanol in this solution : 2.14 M

Molarity is a way to express the density of the solution

Molarity shows the number of moles of solute in every 1 liter of solute or mmol in each ml of solution

[tex]\tt \large{\boxed{\bold {M ~ = ~ \dfrac {n} {V}}}[/tex]

Where

M = Molarity

n = Number of moles of solute

V = Volume of solution

Ethanol(C₂H₅OH) MW =46,06844 g/mol[

[tex]\tt 50\times 0.79=39.5~g[/tex]

[tex]\tt \dfrac{39.5}{46.06844}=0.8574[/tex]

[tex]\tt \dfrac{0.8574}{0.4}=2.14~M[/tex]

Answer:

19

Explanation:

The number below the element Fluorine is 18.99 which rounds to 19.

Answer:

The atomic mass of F is 19.

Explanation:

Answer:

Physical changes occur when objects or substances undergo a change that does not change their chemical composition. This contrasts with the concept of chemical change in which the composition of a substance changes or one or more substances combine or break up to form new substances.

Explanation:

Answer:

A. The color change from blue to green happens in nature.

Explanation:

The color change is an indicator of a chemical reaction that has occurred. Although color changes are not necessarily good diagnostic tool to measure if a chemical reaction has occurred or not.

The evidence that shows that a chemical reaction has taken place is the disappearance of the steel wool shows that a new substance has formed.

The electrochemical series is arrangement of elements in order of decreasing reactivity. It is important to note that the elements that are high up in the electrochemical series can displace the elements that are lower in the series from their aqueous solution.

Steel contains iron which lies above copper in the electrochemical series hence a chemical change occurs when steel dissolves in the copper solution.

Hence, the evidence that shows that a chemical reaction has taken place is the disappearance of the steel wool shows that a new substance has formed.

Learn more: https://brainly.com/question/8646601

Answer:

3 sig figs

Explanation:

Answer:

D. It's density decreases

I'm not sure ok.. Ask an adult for making sure

Answer:

It’s the other answer, thermal energy

Explanation:

I hope y’all get a good grade

Thermal energy refers to the sum of the kinetic energy of all the particles in an object. Hence, the correct option is B.

Thermal energy is a form of internal energy associated with the random motion and vibrations of atoms and molecules within a substance. It is directly related to the temperature of the object, as the temperature is a measure of the average kinetic energy of the particles. The higher the temperature, the greater the thermal energy of the object.

Potential energy (A) refers to the energy that an object possesses due to its position or state, such as gravitational potential energy or elastic potential energy.

Temperature (C) is a measure of the average kinetic energy of the particles in a substance and is not the sum of the kinetic energy of all the particles. However, it is related to thermal energy as it provides information about the average kinetic energy.

Heat (D) refers to the transfer of thermal energy from one object to another due to a temperature difference. It is not the sum of the kinetic energy of the particles in an object but rather the energy transfer between objects with different temperatures.

Learn more about Thermal energy from the link given below.

https://brainly.com/question/3022807

#SPJ2

Explanation:

here

Al is 2

so is 6

and more you can do it

Answer:

h20 water is the answer

Answer:

A)Protons and electrons

Explanation:

An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.

All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example if neutral atom has 6 protons than it must have 6 electrons. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.

when an atom lose or gain the electron ions are formed and number of protons and electrons no longer remain the same.

For example:

An atom of sodium when lose one electron it form positive ion. The number of electrons became 10 and number of protons remain 11.

Na → Na⁺ + 1e⁻

Answer:

The waxy substance is warm.

The waxy substance is less dense than the surrounding liquid.

Convection is occurring.

Explanation:

Convection involves heat transfer by the actual movement of the particles of a substance.

When the wax is heated, the waxy substance becomes warm and rises in the lamp. The warm waxy substance is less dense than the surrounding liquid, this process of rising and falling is as a result of convection occurring in the lava lamp.

Answer:

The person above (or below) me is correct, the answer is:

B.) The waxy substance is warm.

C.) The waxy substance is less dense than the surrounding liquid.

E.) Convection is occurring.

Explanation:

I did the assignment on Edge, 2022.

(See the attachment below.)

Hope this helped, good luck on your quiz! <3

Answer:

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

Explanation:

Answer:

[Pb] = 1.1*10^-8

Explanation:

The Eo values of the half cell reaction of the following are

Pb2+ + 2e- ==> Pb . . .Eo = -0.13 V

Sn2+ + 2e- ==> Sn . . .Eo = -0.14 V

Sn+2 is at cathode(reduction)compartment and Pb+2 is at anode(oxidation) compartment.

the overall reaction will be

Pb ==> Pb2+ + 2e- (oxidation)         Eo = +0.13 V

Sn2+ + 2e- ==> Sn (reduction)         Eo = -0.14 V

----------------------------------------------------------------------

Pb + Sn2+ ==> Pb2+ + Sn             Eo cell = -0.01 V

Qcell = [Pb+2] / [Sn+2]  ( pure Sn , Pb do not appear in Q

Ecell = Eo -0.059/n* logQ

0.22 = -0.0.1 - 0.059/2 logQ

0.23 = -0.0295logQ

LogQ= -7.796

Q = 10^-7.796≈ 1/10^8

[Pb+2] / [Sn+2] = 1/10^8

[Pb] = 1.1*10^-8

Answer:

C What is the cause and effect relationship between erosion and deposition?

Explanation:

i hope this help

Answer:

40

Explanation:

Porque yo creo que asi )          :

Answer:

Molecules always move from areas of high concentration to low concentration.

Explanation:

The correct answer to how diffusion works would be that molecules always move from areas of high concentration to low concentration.

Diffusion is generally defined as the movement of molecules - solid, liquid, or gases - from the region of higher concentration of the molecule to the region of lower concentration of the same molecule. The net movement of molecules continues until an equilibrium is established between the two sides.

Answer:

,jgkgchgchgcchgchg

Explanation:

Answer:

the first answer is force and the second one is power

Explanation:

Force is what causes movement

Answer:

force & power

Explanation:

Answer:

the reactants are na and cl2 the products is the combination nacl --the law of conservation of matter keeps reactions balanced. No you would not be adding more atoms that is what the first combo is.  The coefficient 2 stands for 2 atoms of KL

Explanation:

Answer:

COULD WE PLEASE GET THIS ANSWER?????

Explanation:

1. option B

2. ground state Fe :  [Ar] 4s² 3d⁶

Aufbau rule

Electrons occupy orbitals of the lowest energy level

Charging electrons in the sub-shell uses the following sequence:  

1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d¹⁰, 4p⁶, 5s², 4d¹⁰, 5p⁶, 6s², etc.  

So the correct choice of answer is B.

Ground state is the state of electrons filling skins with the lowest energy levels.

Excited state is the state of electrons which occupy a higher energy level

The atomic number of Fe = 26, so electrons=26

Ground state configuration of Fe : [Ar] 4s² 3d⁶ or

1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d⁶

Answer:

d

Explanation:

Answer:

CH₄  +  2O₂   →   2H₂O + CO₂

Explanation:

From the given problem;

  White balls  = hydrogen

  Black balls  = carbon

  Gray balls  =  oxygen

 Equation of the reaction:

1 carbon atom surrounded by 4 hydrogen + 2 oxygen molecules gives two hydrogen atoms bonded to one oxygen + 1 carbon atom bonded to two oxygen

            CH₄  +  2O₂   →   2H₂O + CO₂

The reaction above is balanced.

Answer:

a

Explanation:

6 times 3 =18