How many protons and electrons does 8 -2 ion contain

The light colored panel reflects light and heats up, while the dark colored panel absorbs the light and stays cooler. This temperature difference causes the vanes to spin.

The dark panel absorbs the incoming light, while the light panel reflects it. Due to this, the two panels' temperatures differ, with the dark panel becoming hotter than the light panel.

Due to the pressure difference caused by the temperature difference, air molecules move from the hot, dark panel to the cool, light panel. The radiometer's associated vanes spin as a result of this air flow.

The radiometer will spin more quickly the greater the temperature differential between the two panels. The temperature differential between the two panels is higher in a vacuum, enabling the radiometer to spin more quickly.

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We already know that number of moles is 0.0025 mol.

So if we know the volume of the gas at STP and the number of moles we can get the mass of the gas.

V = 0.056 L

1 mol = 22.4 L

Molar mass of He = 4.0026 g/mol

So to calculate the weight we need number of moles and molar mass.

weight = 0.0025 mol x 4.0026 g/mol

= 0.01 g

Answer:

To convert joules to calories, you can use the conversion factor:

1 calorie = 4.184 joules

To find out how many calories are in 4,180 joules, divide the given value by the conversion factor:

4,180 joules / 4.184 joules per calorie = 0.9 calories (approximately)

Therefore, there are approximately 0.9 calories in 4,180 joules.

Answer:

Carbon moves from the atmosphere to plants. ...

Carbon moves from plants to animals. ...

Carbon moves from plants and animals to soils. ...

Carbon moves from living things to the atmosphere. ...

Carbon moves from fossil fuels to the atmosphere when fuels are burned. ...

Carbon moves from the atmosphere to the oceans.

Explanation:

Answer:

step 4 , 2 , 3

Explanation:

Answer: i would do the mineral formed when a hot water solution cooled because you said that a mineral forms in water heated by magma inside Earth.

Explanation:

The answer would be C

Explanation:

When magma cools down it will change into a rock type so the answer would be C.

Answer:

DECREASES THIS IS OBVIOUS

Explanation:

BaCl2 crystallizes such that the Ba2+ ions are in a face-centered cubic arrangement and the Cl- ions are in the holes of the lattice (fluorite structure). The numbers of Cl- ions present in one unit cell of this crystal is 8.

The Cubic system arrangement is one in which the unit cell is shaped like a cube.

A face centered cubic arrangements (FCC) is an atom arrangement located in nature. FCC structural unit cell is made up of atoms organized in a cube with fraction of an atom in each corner and six additional whole atoms in the middle of the cube face.

From the information given;

The total number of Ba2+ atom present within the unit cell can be computed as:

\( \mathbf{(6 \ face \: \: sharing \: atom)( \dfrac{1}{2}) \: + (8 \: edges)( \dfrac{1}{8} \: corner \: sharing \: atoms)}\)

\( \mathbf{ = 4 \: atoms}\)

From the formula for BaCl2; since there is twice number of Cl- present as that of Ba2+;

Therefore, we can conclude that the numbers of Cl- ions present in one unit cell of this crystal is 8.

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Answer:

its a theory

Explanation:

dealing with the behaviour of matter and light on the atomic and subatomic scale.

Answer:

Products are the species formed from chemical reactions. During a chemical reaction reactants are transformed into products after passing through a high energy transition state. This process results in the consumption of the reactants.

Explanation:

hope this helps if not let me know have a great day

16400 Joules is the kinetic energy of a 328kg object with a velocity of 10m/s.

Kinetic energy is simply energy possessed by a body in motion.

Kinetic energy is expressed as;

Kinetic energy = 1/2 × m × v²

Where v is velocity and m is mass of the object,

Given the data in the question;

To determine the kinetic energy of the object, plug the given values into the formula above.

Kinetic energy = 1/2 × m × v²

Kinetic energy = 1/2 × 328kg × (10m/s)²

Kinetic energy = 1/2 × 328kg × 100m²/s²

Kinetic energy = 328kg × 50m²/s²

Kinetic energy = 16400kgm²/s²

Kinetic energy = 16400J

Therefore, the kinetic energy 16400 Joules.

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101 mmHg is the total pressure in the tank.

Thus, Dalton's Law of Partial Pressures states that while the volume and temperature of a gaseous mixture are held constant, the total pressure of the mixture is equal to the sum of the partial pressures of its gaseous components.

Nitrogen, oxygen, argon, carbon dioxide, water vapor, and a trace amount of other gases are all present in atmospheric air and pressure.

The increased oxygen content in the chamber can displace the CO bound to hemoglobin faster than air oxygen, hence the hyperbaric chambers are also used to treat carbon monoxide (CO) poisoning. The treatment of scuba divers with the bends is another application for hyperbaric chambers.

Thus, 101 mmHg is the total pressure in the tank.

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Answer:

55.56 amu

Explanation:

Let A, B, C and D represent the four isotopes of iron.

The following data were obtained from the question:

Isotope A (Fe-54):

Mass of A = 53.940 amu

Abundance (A%) = 5.82%

Isotope B (Fe-56):

Mass of B = 55.935 amu

Abundance (B%) = 91.66%

Isotope C (Fe-57):

Mass of C = 56.935 amu

Abundance (C%) = 2.19%

Isotope D (Fe-58):

Mass of D = 57.933 amu

Abundance (D%) = 0.33%

Average atomic mass =.?

The average atomic mass of the iron can obtained as follow:

Average atomic mass = [(mass of A × A%)/100] + [(mass of B × B%)/100] + [(mass of C × C%)/100] + [(mass of D × D%)/100]

Average atomic mass = [(53.940 × 5.82)/100] + [(55.935 × 91.66 )/100] + [(56.935 × 2.19)/100] + [(57.933 × 0.33)/100]

= 2.848 + 51.270 + 1.247 + 0.191

= 55.56 amu

Therefore, the average atomic mass of the iron is 55.56 amu

The grams of AgCl are generated when 85 g of BaCl₂ reacts is 10.86 g.

The balanced equation is given as :

BaCl₂    +    2AgNO₃   ----->   2AgCl   +   Ba(NO₃)₂

the mass of the BaCl₂ = 85 g

molar mass of BaCl₂  = 208.23 g/mol

moles of BaCl₂  = mass / molar mass

                          = 85 / 208.23

                          = 0.408 mol

1 mole of BaCl₂  produce 2 moles of AgCl

0.408 moles of BaCl₂  = 2 × 0.408

                                      = 0.816 mol of AgCl

moles of AgCl = 0.816 mol

mass of AgCl = moles × molar mass

                      = 0.816 g × 143.32 g/mol

                      = 10.86 g

Thus,  The grams of AgCl are generated when 85 g of BaCl₂ reacts is 10.86 g.

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Answer:

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Answer:

melting butter and frying eggs

Explanation:

Hope this helps please mark me brainliest

Answer:

ok so what do i do now that you posted the answer?

Answer:  D

Explanation:

definitely didn't copy you

Answer:

The combustion of diborane (B2H6) is as follows:

2B2H6(g) + 6O2(g) → 4H2O(g) + B4O(g)

The balanced chemical equation shows that 2 moles of B2H6 react with 6 moles of O2 to produce 4 moles of H2O and 1 mole of B4O. We can use this information to calculate the amount of heat released by the combustion of 0.491 g of B2H6:

0.491 g B2H6 × (1 mol B2H6/27.67 g B2H6) × (1 mole B4O/2 moles B2H6) × (-2037 kJ/mol B4O) = -7.89 kJ

The negative sign indicates that the reaction releases heat.

The heat released by the reaction is absorbed by the calorimeter, which causes its temperature to increase. We can use the equation:

q = Ccalorimeter × ΔT

where q is the amount of heat absorbed by the calorimeter, Ccalorimeter is the heat capacity of the calorimeter, and ΔT is the change in temperature of the calorimeter.

Rearranging the equation, we get:

ΔT = q/Ccalorimeter

Substituting the values we obtained, we get:

ΔT = (-7.89 kJ)/(7.854 kJ/°C) = -1.005°C

The negative sign indicates that the temperature of the calorimeter decreases by 1.005°C. Therefore, the final temperature of the calorimeter is:

19.63°C - 1.005°C = 18.625°C

Rounding to the appropriate number of significant figures, the final temperature of the calorimeter is 18.6°C.

Hope this is what you are looking for.

Answer: Earth and the sun

Explanation:

Because the earth  is tilt toward the sun the planet rotates about axis but it isn't visible,also at different times of the year the northern ans southern axis are close to the sun.

hope this helps  

Answer:

study island

proof

Explanation:

Fossilized marine creatures found at the top of the Himalayan Mountains provide evidence for a scientific theory of plate tectonics. Therefore, option (D) is correct.

Plate tectonics can be explained as the Earth's lithosphere being made of a large number of tectonic plates that have been slowly moving since about 3.4 billion years ago.

The lithosphere is broken into 7 or 8 major plates and many minor plates or "platelets". These plates meet, and their relative motion evaluates the kind of plate boundary: convergent, transform, or divergent.

Mountain-building, Earthquakes, volcanic activity, and oceanic trench formation take place along these plate boundaries. The relative annual movement of the plates ranges from 0 to 10 cm.

Tectonic plates are comprised of the oceanic and the thicker continental lithosphere. The process of subduction which is actually one plate moving under another carries the edge of the lower plate down into the mantle along convergent boundaries.

Pebbles, Shells, and marine fossils found in the limestone beds of the tallest Himalayas Mountains give evidence of the theory of plate tectonics.

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Answer : The correct match is:

1 positive charge = 1 negative charge

2 positive charges = 2 negative charges

3 positive charges = 3 negative charges

Explanation :

As we now that there are three subatomic particles which are protons, electrons and neutrons.

The protons and neutrons are located inside the nucleus and electrons are located around the nucleus.

The protons are positively charged, the electrons are negatively charged and neutrons are neutral.

As we know that all the things are made up of charges and opposite charges attract to each other.

In a neutral atom, the positive charges and negative charges are balanced in an object. That means, in neutral atom the number of positive charges are equal to the negative charges.

So we can say that:

1 positive charge = 1 negative charge

2 positive charges = 2 negative charges

3 positive charges = 3 negative charges

Answer:

1 positive---- 1 negative

2 positive---- 2 negative

3 positive---- 3 negative

Explanation:

edge 2023

Answer:

Explanation:

Here, we want to deduce the rate law for the reaction given

According to the data provided:

where the values in the square parentheses represent the concentrations and k represents the rate constant

Let us work with equations 1 and 3:

Divide equation 3 by 1:

To get b, we can use equations 1 and 2:

Divide equation 2 by 1, we have it that:

The rate law for the reaction is thus:

b) The overall order is the sum of the powers

That would be 1 + 2 = 3

Answer:

Citric acid is a weak organic acid found in citrus fruits.

Explanation:

The equation C2H4(g) + H2(g) + C2H6(g) → Caco3(s) + Cao(s) + CO2(g) shows an increase in entropy due to the formation of a gas as a product. Option A

In this equation, the reactants on the left-hand side consist of gases (C2H4 and H2), while the products on the right-hand side include a solid (Caco3) and a gas (CO2).

When a reaction involves a change from gaseous to solid or liquid states, there is typically a decrease in entropy because the particles become more ordered and constrained in the solid or liquid phase.

Conversely, when a reaction involves the formation of gases, there is generally an increase in entropy because gases have higher degrees of molecular motion and greater freedom of movement compared to solids or liquids.

In the given equation, the reactants include three gaseous compounds (C2H4, H2, and C2H6), and one of the products is a gas (CO2). Therefore, the overall entropy of the system increases during this reaction.

The equation Fe(s) + S(s) → FeS(s) does not show an increase in entropy. Both the reactants (Fe and S) and the product (FeS) are solids. Since solids have lower entropy compared to gases or liquids, the entropy of the system does not increase in this reaction. Option A

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Answer: C

Explanation:

It gives kinetic energy to the molecules and it breaks the bonds faster because they jiggle more

The complete oxidation of the monosaccharide shown will create a carboxylic acid.

Monosaccharides can be oxidized to carboxylic acids. Recall that monosaccharides have an aldehyde or ketone group at one end and a CH2OH group at the other end.

For the monosaccharide shown, oxidation may lead to the conversion of COH group  to acid (-COOH). This confirms the presence of -COH yielding the product C4H8O5.

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Answer:

Explanation:

Resonance structure occurs in an organic compound that undergoes resonance effects. This resonance effect is sometimes called the mesomeric effect helps to increases the stability of organic compounds that have alternating single bonds and double bonds.

The second resonance structure diagram for the ion given in the question can be found in the attached diagram below.

Answer:

so so

Explanation:

this your question?? <_>

The rate of disappearance of Br- is 5 times  of the rate of disappearance of BrO₃⁻. Hence, the disappearance rate of Br- in the reaction is 0.201 M/s .

The rate of a reaction is the rate of disappearance of the reactants or the rate of appearance of the products. The rate of a reaction is directly proportional to the molar concentration of the reactants.

For the given reaction, the rate of reaction can be written in the following terms.

-d/dt [BrO₃⁻] = -1/5 d/dt [Br-] =  -1/6d/dt [H+ ] = +1/3d/dt  [Br²] = + 1/3 d/dt[H₂O]

The minus sign indicates the disappearance and + indicates the formation.

Given, the rate of disappearance of BrO₃⁻ = -d/dt [BrO₃⁻]  = 0.041 M/s.

-d/dt [BrO₃⁻]  = 1/5 d/dt [Br-]

then  d/dt [Br-] = 5 -d/dt [BrO₃⁻]  = 5 × 0.041 M/s = 0.201 M/s.

Therefore, the rate of disappearance of Br- in this reaction is 0.201 M/s.

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