Which interaction occurs when light bounces off of a surface?(2 points)

Absorption

Reflection

Refraction

Separation


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To graph the function g(x) = f(-x), you can start with the graph of f(x) and then reflect it about the y-axis.

To find the graph of the function g(x) = f(-x), we can start with the graph of the function f(x) and then reflect it about the y-axis.

If the graph of f(x) is symmetric with respect to the y-axis, meaning it is unchanged when reflected, then g(x) = f(-x) will have the same graph as f(x).

However, if the graph of f(x) is not symmetric with respect to the y-axis, then g(x) = f(-x) will be a reflection of f(x) about the y-axis.

In either case, the resulting graph of g(x) = f(-x) will be symmetric with respect to the y-axis.

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A neutral atom contains two charged particles; protons and electrons. Neutrons are neutral particles.

Neutrons and protons are present inside the nucleus of the atom. Electrons revolve around the nucleus of the atoms in orbital paths known as shells.

The number of electrons in an atom is always equal to the number of protons. Therefore, the charge on a neutral atom is always zero. When an atom loses or gains electrons, it becomes a charged particle. This charged particle is known as ion.

Therefore, only a neutral atom has zero charges.

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Answer:

Explanation:

Na₂[Zn(OH)₄]   :  2 Na⁺¹  + Zn(OH)₄⁻²

coordination no : 4 , central metal ion is Zn , charge on it  =  + 2

(+ 2 -  4 = -2 )

K[Co(H₂O)₂(C₂O₄)₂] :   K⁺  +  Co(H₂O)₂(C₂O₄)₂⁻

coordination no = 2 + 2 = 4  , two for H₂O and 2 for C₂O₄ ⁻²

charge on metal Co is + 3   [  - 4+ 3  = - 1 ]  

[Ru(H₂O)₂(NH₃)₂Cl₂]Br  = Ru(H₂O)₂(NH₃)₂Cl₂ ⁺¹  +  Br ⁻¹

coordination no : 2+ 2 + 2 = 6 ( 2 for H₂O , 2 for NH₃ , 2 for Cl )

central metal ion is Ru : charge on it = + 3 .

( + 3 - 2 = + 1 )

The coordination number shows the number of ligands attached to the central metal.

A complex is a coordination compound which contains a central metal atom or ion. The coordination number refers to the number of ligands in the complex. The coordination number usually influences the geometry of the complex compound.

The coordination number and the charge on the central metal in each of the complexes are shown below;

Na2[Zn(OH)4] - The coordination number of the complex is 4 and the charge on the central metal ion is +2.

K[Co(H2O)2(C2O4)2] - The coordination number of the complex is 6 and the charge on the central metal is +3.

[Ru(H2O)2(NH3)2Cl2]Br - The coordination number of the complex is 6 and the charge on the central metal is +3.

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Answer:

The answer is "Option a".

Explanation:

Multiply the mass of the solutions by 3.17% to get the mass of \(BaCl_2\):

\(\to 427 \ g \times 0.0317 = 13.56\ g\)

Divide this mass with BaCl2's molecular concentration to acquire the mole ratio:  

\(molar mass = 208.24 \frac{g}{mol}\\\\moles = \frac{13.56}{208.24} = 0.065 \ moles \\\\\)

                       \(= 6.5 \times 10^{-2} \ moles\)

A 427 g sample is 3.17% by mass barium chloride contains 6.5 × 10⁻² moles of BaCl₂.

A 427 g sample is 3.17% by mass barium chloride, that is, there are 3.17 g of barium chloride per 100 g of sample.

The mass of barium chloride in 427 g of the sample is:

\(427gSample \times \frac{3.17gBaCl_2}{100gSample} = 13.5gBaCl_2\)

We can calculate the number of moles in 13.5 g of barium chloride using its molar mass (208.23 g/mol).

\(13.5 g \times \frac{1mol}{208.23g} = 6.5 \times 10^{-2} mol\)

A 427 g sample is 3.17% by mass barium chloride contains 6.5 × 10⁻² moles of BaCl₂.

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Mass of lead sulphate is 18.195g

Lead sulphate is the odorless and white crystalline powder and it is used to storage batteries as paint pigment and laboratory reagents

Given reaction is

Pb(NO₃)₂ +  H₂SO₄  → PbSO₄  + 2HNO₃

Here given data is

20 g of lead nitrate dissolved in water

And number of moles = mass/molar mass, molar mass = 331.2 g/mol

Number of moles of Pb(NO₃)₂  = 20g/331.2 g/mol

Number of moles of Pb(NO₃)₂  = 0.060g/mol

Therefore, 1 mole of Pb(NO₃)₂ will produce 1 mole of PbSO₄

0.060 mole of Pb(NO₃)₂ = 0.060 mol PbSO₄

Therefore, now we can calculate the mass :

And number of moles = mass/molar mass

Number of moles of  PbSO₄  = 0.060×303.26

Number of moles of  PbSO₄  = 18.195g

Mass of lead(II) sulfate would be produced by the action of excess dilute sulfuric acid on 20 g of lead nitrate dissolved in water is 18.195g

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Answer:

  -172.6 °C

Explanation:

You want to know the Celsius equivalent of the temperature 100.6 K.

The relation is ...

  C = K - 273.15

  C = 100.6 -273.15 = -172.55

The temperature is -172.55 °C, about -172.6 °C.

__

Additional comment

We have rounded to tenths, because that is precision of the temperature given. If you use 273 as the conversion constant, you will get -172.4.

Answer:

Its B

Explanation:

Answer:

I think the answer is polar covalent as there will be an unequal amount of electrons shared/available. An ionic bond will not take place because the valance shell of the larger atom contains more than 1 electron.

By definition, barium and chlorine combine in a 1: 2 ratio (BaCl₂) since 1 Ba ion and 2 Cl ions are required to form the compound.

An ionic bond is produced between metallic and non-metallic atoms, where electrons are completely transferred from one atom to another. During this process, one atom loses electrons and another one gains them, forming ions. Usually, the metal gives up its electrons forming a cation to the nonmetal element, which forms an anion.

Barium(Ba) is a metal and Chlorine(Cl) is a non-metal.   So these elements form an ionic compound.

Barium has +2 charge and Chlorine has -1 charge.

When Barium Chloride is formed, it should be a neutral compound, this is net charge should be zero.

So, for the neutralization of charges of the ions and form a stable compound, the +2 charge of barium requires 2 Cl atoms.

This is, the net charge can be calculated as: +2 + 2×(-1)= 0.

Then, you get the formula of Barium chloride, that is BaCl₂.

Finally, barium and chlorine combine in a 1: 2 ratio (BaCl₂) since 1 Ba ion and 2 Cl ions are required to form the compound.

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Answer:

D

Explanation:

you need battery, light bulb and wire in a close circuit

Answer:

D - a battery, light bulb and wire in a closed circuit.

Explanation:

A battery due to the charge in it.

A light bulb so the energy has somewhere to go to.

A wire in a closed circuit, so that the energy has a place for transport without interruptions.

Answer:

I think number4.Nuclear fusion reaction is not possible in earth

Nuclear fusion and nuclear fission both have common to temperatures over one million degrees Celsius are needed for the reaction to occur. Therefore, option 4 is correct.

A reaction known as nuclear fusion occurs when two or more atomic nuclei fuse to create new atomic and subatomic particles. Energy is released or absorbed depending on how much mass there is between the reactants and products.

Nuclear reactions that involve fusion and fission both yield enormous quantities of energy that can be used to generate power.

The two heavy isotopes of hydrogen, deuterium and tritium, are the primary fuels used in nuclear fusion. Only 0.0153% of natural hydrogen is deuterium, which may be easily and cheaply produced from seawater. Lithium, which is also widely distributed in nature, can be used to create tritium.

Thus, option 4 is correct.

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Answer:

A solution of sugar that contains the maximum amount of sugar that will dissolve is a saturated solution.

Explanation:

A saturated solution is a solution that contains as much solute as can dissolve in a given solvent at a given temperature.

for you the solute is sugar

Answer:

Dew is liquid water droplets that form on grass, spider webs, and other things in the early morning or late evening. ... That means it turns from a liquid into a gas called "water vapor." When evening comes, the warm ground continues to radiate heat into

Answer:

\(m_{H_2O}=9.24gH_2O\)

Explanation:

Hello there!

In this case, since there is a 2:2 mole ratio between sodium peroxide and water according to the given reaction, it is possible to apply the following stoichiometric setup for the calculation of the required mass of water:

\(m_{H_2O}=40.0gNa_O_2*\frac{1molNa_O_2}{78gNa_O_2}*\frac{2molH_2O}{2molNa_O_2} *\frac{18.02gH_2O}{1molH_2O} \\\\m_{H_2O}=9.24gH_2O\)

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The cardboard sleeves reduce the heatness from the coffee cup. So then the cosumer does not get a burn.

Answer:

58.44277 gram

Explanation:

Answer:

Valency is the measure of the combining power of an element

The molar mass of a gas with a density of 1.02 g/L at 2.13 atm and a temperature of 20°C is 47.9 g/mol.The molar mass of an element or compound is the mass of one mole of that substance. A mole is the SI unit for the amount of a substance.

It's defined as the amount of a substance that contains the same number of entities as there are atoms in 12 grams of carbon-12.Molar mass (M) = mass (m) ÷ amount of substance (n)So, M = m/n

Where m is the mass in grams and n is the number of moles. The unit of molar mass is grams per mole (g/mol).

The ideal gas law is used to calculate the molar mass of a gas. The ideal gas law is:P V = n R T,Where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.

Convert the density to grams per liter: 1.02 g/L.

The density is mass/volume, thus 1.02 g/L means that 1 liter of the gas weighs 1.02 g.

This means that 1 mole of gas will occupy 22.4 L (at standard temperature and pressure, STP).Calculate the number of moles of gas using PV = nRT.P = 2.13 atmV = 22.4 L (at STP)R = 0.0821 L·atm/K·molT = 273.15 K + 20 K = 293.15 K

Thus, n = PV/RT = (2.13 atm × 22.4 L)/(0.0821 L·atm/K·mol × 293.15 K) = 0.973 mol

Calculate the molar mass (M) using M = m/n.m = density × volume = 1.02 g/L × 22.4 L = 22.848 gM = m/n = 22.848 g/0.973 mol = 23.5 g/mol Convert to units of grams per mole: 23.5 g/mol

The molar mass of a gas with a density of 1.02 g/L at 2.13 atm and a temperature of 20°C is 47.9 g/mol.

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Answer:

mass = moles x molar mass

m= 3.7 x (23x2+16)

m= 3.7x62

m= 229.4g

198.4 grams are there is 3.7 moles of Na₂O.

The number of moles is defined as the ratio between given mass and molar mass.

\(\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}\\\\\)

Given:

Number of moles= 3.7 moles

To find:

Mass=?

Molar mass of Na₂O= 62 g/mol

Thus substituting the values in the given formula

\(\text{Given mass}=\text{Number of moles}*\text{Molar mass}\\\\\text{Given mass}= 3.2 \text{moles}*62 \text{g/mol}\\\\\text{Given mass}=198.4 \text{g}\)

Thus, 198.4 grams are there is 3.7 moles of Na₂O.

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Answer: Absolute dating is used to determine a precise age of a rock or fossil through radiometric dating methods. This uses radioactive minerals that occur in rocks and fossils almost like a geological clock. ... These isotopes break down at a constant rate over time through radioactive decay.

To balance the equation and identify the type of reaction, let's start by assigning coefficients to each compound: 2H2O + 1SO3 -> 1H2SO4

To balance the equation, we need to ensure that the number of atoms on both sides is the same. Here, we have two hydrogen (H) atoms on the left side and two on the right side, so hydrogen is already balanced.

We have two oxygen (O) atoms on the left side and four on the right side, so we need to balance oxygen by adding a coefficient of 2 in front of the water molecule:

2H2O + 1SO3 -> 1H2SO4

Now the equation is balanced with two hydrogen, four oxygen, and one sulfur (S) atom on both sides.

The type of reaction represented by this equation is a combination or synthesis reaction. In a combination reaction, two or more substances combine to form a new compound. In this case, water (H2O) and sulfur trioxide (SO3) combine to form sulfuric acid (H2SO4).

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Answer:

D

Explanation:

The ratio of C6H12O6 (which will be referred to as "the carb") to oxygen is 1 to 6, so if we find an answer which has the same ratio, it should be chosen. A is 1:3
B is even worse with a ratio of the carb to oxygen of 1:2
C is the same as B, 1:2
D has a ratio of the carb to oxygen of 1:6, which is what we are looking for.

La nomenclatura IUPAC tiende a eliminar las ambigüedades asociadas con la existencia de diferentes nombres para la misma estructura.

IUPAC, que implica que la Unión Internacional de Química Pura y Aplicada ha establecido reglas grupales para la denominación de compuestos. Este sistema de IUPAC tiende a eliminar las ambigüedades asociadas con la existencia de diferentes nombres para una misma estructura.

Los siguientes son los nombres de los compuestos;

a) 3,7 -dimetildecano

b) 2,4- dietil ciclopentano

c) 2-etil-3-propil-6-metilheptano

d) 2-etil propano

e) 2,4-dietil-5-metil ciclohexano

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Answer:

saturated refers to a point of maximum concentration, in which no more solute may be dissolved in a solvent.

Acid:sulfuric,nitric

Basic salt:Calcium carbonate (CaCO3)

Sodium acetate (NaOOCCH3)

Explanation:

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1. The number of mole of C₃H₈ needed to make 15.5 moles of CO₂ is 5.2 moles

2. The number of moles of O₂ needed is 25.8 moles

The number of mole of C₃H₈ needed can be obtained as illustrasted below:

C₃H₈ + 5O₂ -> 3CO₂ + 4H₂O

From the balanced equation above,

3 moles of CO₂ was obtained from 1 mole of C₃H₈

Therefore,

15.5 moles of CO₂ will be obtain from = (15.5 × 1) / 3 = 5.2 moles of C₃H₈

Thus, number of mole of C₃H₈ needed is 5.2 moles

We can obtain the number of mole of O₂ needed as follow:

C₃H₈ + 5O₂ -> 3CO₂ + 4H₂O

From the balanced equation above,

3 moles of CO₂ was obtained from 5 moles of O₂

Therefore,

15.5 moles of CO₂ will be obtain from = (15.5 × 5) / 3 = 25.8 moles of O₂

Thus, number of mole of O₂ needed is 25.8 moles

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Complete question:

How many moles of C₃H₈ are needed to make

15.5 moles of CO₂? How much O₂ will be needed?

C₃H₈ + 5O₂ -> 3CO₂ + 4H₂O

Answer:

There is no graph

Explanation:

Answer:

Yes, we should invest in renewable energies that decrease the levels of carbon dioxide in the atmosphere, that is, decrease the partial pressure of carbon dioxide in the environment since it is lethal for human life, in turn I consider that the exploitation of sources Oil was widely used but I think they should have an end, since they pollute oceans, oxygen, and fuels that are not necessary for today's technology since automobiles could be a base of electric or solar energy

Explanation:

Environmental pollution is a very serious current problem, since we should stop investing in oil sources and be able to keep those profits or that economy in another way or replace them with another resource, since if this greenhouse effect is not perceived as a current serious problem, we could run the risk of suffering natural catastrophes, systematic diseases, affections in the same life.

The balanced equation for the reaction that takes place when chlorine is added to waste water treatment to prevent corrosion by hydrogen sulphide is H2S (g) + Cl2 (g) 2HCl (aq) + S(s).

In the process of treating water, oxidation-reduction eliminates dissolved minerals like iron and manganese. Moreover, this procedure can eliminate bacteria and other organic material from water. Water is typically treated with chemicals like chlorine or ozone to reduce oxidation.

Oxidation: Oxidation is a chemical reaction in which an object obtains oxygen. Reduction: When a substance loses oxygen during a chemical process, it is said to be reduced. For instance, Zn + CO = Zn + O + C.

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The number of formula units that make up 26.4g of magnesium chloride is 1.67 × 10²³ units.

Formula units is the empirical formula of an ionic compound (that does not possess individual molecules) for use in stoichiometric calculations.

The number of formula units of a substance can be calculated by multiplying the number of moles of the substance by its number of moles as follows:

no of formula units = no of moles × 6.02 × 10²³

First, we convert the mass of magnesium chloride to moles by dividing by its molar mass. Molar mass of magnesium chloride is 95.211 g/mol.

moles = 26.4g ÷ 95.211g/mol = 0.277moles

no of formula units = 0.277moles × 6.02 × 10²³

no of formula units = 1.67 × 10²³ units

Therefore, 1.67 × 10²³ units is the number of formula units of magnesium chloride.

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