How to get nail polish remover off the top of your chrome book

Answer:

It is a chemical reaction in which the reactants form products and products react together to give reactants back. That means reversible reactions can go in both directions forward as well as backward direction.

Answer:

the answer is hot,dense points; each smaller than an atom

Explanation:

the big bang theory was proposed to suggest the expansion of the universe by describing the origin of all components of the universe and its planetary bodies. its suggested that the whole universe was in a state of high temperature and highly dense points (which were smaller than atoms) but continuously expanded by cooling down which gave rise to the formation of subatomic particles, atoms, etc.

btw I found this on brainly

Answer:

c. I, Br, Cl

Explanation:

The option C group of elements is expected to have the highest ionization energy.

Ionization energy is the energy needed to remove the most loosely held electron from an atom.

Answer:rrrrrrrrrrrrrrrrrrr

Explanation:

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Answer:

C

Explanation:

I hope that helps!!! it kinda gave you the answer though

Answer:

carbon dioxide

Explanation:

Putting the Brakes on Carbon Emissions

Every year, nuclear-generated electricity saves our atmosphere from more than 506 million metric tons of carbon dioxide, equivalent to taking more than 110 million passenger cars off the road.

Answer:

its 2.86 kg I believe.......

Answer: 14.52J

Explanation:

Answer:

B. Nucleus

A. Orbitals

Explanation:

Ed22

The region of the atom where protons and neutrons are located (B) is called the nucleus.

The region of the atom where electrons are located (A) is called orbits.

In an atom, the nucleus is the central core that contains protons and neutrons. It is a tiny, dense region located at the center of the atom. Protons have a positive charge, while neutrons are electrically neutral (have no charge). The number of protons in the nucleus determines the element's identity.

Orbits (also called electron shells or energy levels) are the regions around the nucleus where electrons are found. Electrons are negatively charged particles that move within these orbits. Each orbit has a specific energy level, and electrons closer to the nucleus have lower energy levels. Electrons occupy the lowest available energy levels first before moving to higher levels as the atom gains more electrons.

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The complete question is shown in the image attached below -

Answer:

Mass of reactant and mass of product must be equal.

Explanation:

Law of conservation of mass:

According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.

Explanation:

This law was given by French chemist  Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

For example:

In given photosynthesis reaction:

6CO₂ + 6H₂O + energy → C₆H₁₂O₆ + 6O₂

there are six carbon atoms, eighteen oxygen atoms and twelve hydrogen atoms on the both side of equation so this reaction followed the law of conservation of mass.

Answer:

B

Explanation:

Atomic # = Protons

it says 4 p in the inside of the orbital

The carbon dioxide readily absorbs radiation with an energy of 4.67×10⁻²⁰J and wavelength is 7.04 x 10¹³, then the frequency is 4.26 x 10⁻¹¹ m.

Frequency can be defined as the number of occurrences of a repeating event per unit of time. It is also known as temporal frequency to emphasizes the contract to spatial frequency and can be called as ordinary frequency to emphasize the contract to angular frequency. It is denoted by f.

f = hc / ∧

f = 6.626 x 10⁻³⁴ x 3.0 x 10³ / 4.67 x 10⁻²⁰

f = 4.26 x 10⁻¹¹ m

Thus, carbon dioxide readily absorbs radiation with an energy of 4.67×10⁻²⁰J and wavelength is 7.04 x 10¹³, then the frequency is 4.26 x 10⁻¹¹ m.

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Answer:

Greater electronegativity and these are non metals.

Explanation:

Answer:

Biosphere

Explanation:

The biosphere covers all living organisms on Earth. There is an estimated 20 million to 100 millions different species in the world organized into the 100 phyla that make up the five kingdoms of life forms. These organisms can be found in almost all parts of the geosphere.

Answer:

An uninterruptible power supply can save data during an outage, and a surge protector can prevent damage from a surge. Surge protectors absorb or ground overvoltage from spikes. Each time a surge protector does its job, resulting damage can reduce effectiveness for the next surge.

Explanation:

Answer:

0.49 mol HCl

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

18 g HCl

Step 2: Identify Conversions

Molar Mass of H - 1.01 g/mol

Molar Mass of Cl - 35.45 g/mol

Molar mass of HCl - 1.01 + 35.45 = 36.46 g/mol

Step 3: Convert

[tex]18 \ g \ HCl(\frac{1 \ mol \ HCl}{36.46 \ g \ HCl} )[/tex] = 0.493692 mol HCl

Step 4: Check

Round our answer to 2 decimal places.

0.493692 mol HCl ≈ 0.49 mol HCl

Answer:

0.49 mol

Explanation:

Answer:

The correct answer is 0.373 M.

Explanation:

The reaction will be,

H3PO4 (aq) + 3KOH (aq) ⇔ 3H2O (l) + K3PO4 (aq)

Based on the given information, the molarity of the solution KOH is 0.100 M, the volume of the solution given is 112 ml or 0.112 L.

The molarity of the solution with respect to KOH is,

M = Moles/Volume of Solution (liters)

Moles of solute = Molarity * Volume of solution

Moles = 0.100 M * 0.112 L

= 0.0112 moles

From the reaction it is clear that 3 moles of KOH needed 1 mole of H3PO4, thus, 0.0112 moles of KOH will require,

1/3 * 0.0112 = 0.00373 moles of H3PO4

The volume of the H3PO4 solution is 10 ml or 0.01 L.

The molarity of the solution will be,

M = Moles/ Volume of Solution (liters)

M = 0.00373/0.01 = 0.373 M

Thus, the concentration of the solution is 0.373 M.

The concentration of the H3PO4 would be 0.37 M

Going by the balanced equation of the reaction:

[tex]3KOH + H_3PO_4 ---> 3H_2O + K_3PO_4[/tex]

The mole ratio of KOH to H3PO4 is 3:1.

Using the equation: CaVa/CbVb = 1/3

What we are looking for is Ca:

Ca = CbVb/3Va

              = 0.1 x 112/3 x 10

                 = 0.37 M

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Answer:

names of 10 metallic minerals are Silver, Chromium, Tin, Nickel, Copper, Iron, Lead, Aluminum, Gold, and Zinc.

Explanation:

Answer:

19.6 J

Explanation:

The following data were obtained from the question:

Mass (m) of object = 2 Kg

Height (h) = 1 m

Workdone =?

NOTE: Acceleration due to gravity (g) = 9.8 m/s²

Thus, we can obtain the workdone in lifting the object by using the following formula:

Workdone = mgh

Workdone = 2 × 9.8 × 1

Workdone = 19.6 J

Therefore, the workdone in lifting the object to height of 1 m is 19.6 J

Answer:

the correct answer is B.....please give me BRAINLEST

Explanation:

im so sorry for being so late to answer

Answer:

B

Explanation:

Answer:

Me gusta el triángulo, la respuesta es triángulo.

Explanation:

Answer:

Plants use carbon dioxide to make food.

Explanation:

Answer:B

Explanation: i did it

Answer:

Mitosis

Mitosis is a method of cell division in which a cell divides and produces identical copies of itself.

Explanation:

The energy produced : -32.89 kJ

Delta H reaction (ΔH) is the amount of heat / heat change between the system and its environment

(ΔH) can be positive (endothermic = requires heat) or negative (exothermic = releasing heat)

The enthalpy of combustion of naphthalene (MW = 128.17 g/mol) is -5139.6 kJ/mol.

For 0.8210 g of naphthalene :

mol =

[tex]\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{0.8210}{128.17}=0.0064[/tex]

The energy produced :

[tex]\tt Q=\Delta H\times n(mol)\\\\Q=-5139.6\times 0.0064=-32.89~kJ[/tex]

1. 0.33 M

2. 0.278 M

Molarity is a way to express the concentration 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]\large{\boxed {\bold {M ~ = ~ \frac {n} {V}}}[/tex]

Where

M = Molarity

n = Number of moles of solute

V = Volume of solution

1. 0.350 mol of NaOH in 1.05 L of solution.

n=0.35

V=1.05 L

Molarity :

[tex]\tt M=\dfrac{0.35}{1.05}=0.33[/tex]

2. 14.3 g of NaCl in 879 mL of solution.

mol NaCl(MW=58.5 g/mol) :

[tex]\tt mol=\dfrac{mass}{MW}\\\\mol=\dfrac{14.3~g}{58.5~g/mol}=0.244[/tex]

Molarity :

[tex]\tt M=\dfrac{0.244}{0.879~L}\\\\M=0.278[/tex]

Answer:

No, it will not exist in real life

Explanation:

Let us consider the electronic configuration of magnesium; Ne 3s2

We must also assume that the compound Mg20 is ionic. If this is the case, then it involve Mg+ and O^2-.

The electronic configuration of Mg+ is Ne 3s1. We can see that this specie has not yet attained a stable noble gas configuration, As a result of this, the ion is not stable. Hence, Mg20 does not occur in real life,

Answer:

titanium

Explanation:

according to my knowledge titanium is more expensive than diamonds....A country becomes powerfull by having more quantity of titanium....all the bombs, nuclear weapons and nuclear enegry are made from titanium so it is expensive and powerfull too..

Answer:

3. 39 39 54

Explanation:

Atoms are the smallest units of matter that have the characteristics of a chemical element. They consist of small particles called protons, electrons, and neutrons.

Protons are positively charged particles that make up the nucleus of the atom along with neutrons, neutrally charged particles. Their mass is almost the same - about 1 AMU (atomic mass unit). Electrons, the negatively charged particles, are much lighter than them and don't significantly contribute to the mass of the atom. Their mass is equal to about 1/2000 of the mass of a proton or neutron.

This is why we need to determine which atom out of the ones you were given has the highest number of protons and neutrons. The first has 91, the second 90, the third 93, and the fourth 91. This means that the third atom has the highest mass.

5g

Anything between 4 and 6 is ok.

The additional mass of solute to be added will be determined by the mass of solute required to saturate a solution of NaNO3 in 100. grams of H2O.

A saturated solution is one that contains just as much solute as it can normally hold at a given temperature. We should now that when additional solute is added to a saturated solution, the additional solute does not dissolve.

The table is not presented hence the question is incomplete. However, the additional mass of solute to be added will be determined by the mass of solute required to saturate a solution of NaNO3 in 100. grams of H2O.

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Answer:

a. 5 protons and 5 neutrons

b. 11 protons and 13 neutrons

c. 27 protons and 32 neutrons

d. 82 protons and 126 neutrons

e. 92 protons and 143 neutrons

Explanation:

Using isotope notation:

ˣN

X = Amount of neutrons and protons

N is the atom. If N is nitrogen, the atomic number is 7, that means there are 7 protons.

X - Amount of protons = Neutrons

a. ¹⁰B. Atomic number = 5 = Number of protons

10 - 5 = 5 = Number of neutrons

5 protons and 5 neutrons

b. ²⁴N. Atomic number = 11 = Number of protons

24 - 11 = 13 = Number of neutrons

11 protons and 13 neutrons

c. ⁵⁹Co. Atomic number = 27 = Number of protons

59 - 27 = 32 = Number of neutrons

27 protons and 32 neutrons

d. ²⁰⁸Pb. Atomic number = 82 = Number of protons

208 - 82 = 126 = Number of neutrons

82 protons and 126 neutrons

e. ²³⁵U. Atomic number = 92 = Number of protons

235 - 92 = 143 = Number of neutrons

92 protons and 143 neutrons