Use the drop-down menus to answer the questions. Which type of radioactive decay produces particles with a positive charge and very small mass? Which type of radioactive decay produces radiation with zero mass? Which type of radioactive decay produces radiation that requires lead shielding? Which type of radioactive decay produces radiation that can be stopped by a sheet of paper? Which type of radioactive decay produces particles with the most mass?.

Answer:

yes you are doing it right my chemistry teacher said said so

Answer:

firer burning I'm thinking

Each photon will give one electron, thereby the number of photons given each second are [tex]4.46\;\times\;10^{15}[/tex]. The power carried by the electrons is 0.255 mW.

A laser is a light-emitting device that enables the process of optical amplification to deduce electromagnetic radiations.

The given laser has a power output of 2.15 mW and a wavelength is 413 nm.

The energy of each photon emitted is given as:

[tex]E=h\nu=\dfrac{hc}{\lambda}=\rm \dfrac{(6.63 \;\times\; 10^{-34} m^2 kg s^{-1}) \;\times (3.0 \;\times\; 10^8 m s^{-1})}{413 \;\times\; 10^{-9} m}=4.81 \;\times\;10^{-19}[/tex]

The number of photons ejected at 2.15 mW is given as:

[tex]\rm \dfrac{2.15\;\times\;10^-^3\; J}{4.81\;\times\;10^-^1^9J}=4.46\;\times\;10^1^5 \;photons[/tex]

Each photon will give one electron, thereby the number of photons given each second are [tex]4.46\;\times\;10^{15}[/tex].

With the work function of 2.71 eV, the power carried by the electrons is given as:

[tex]KE_{e}=h\nu-\Phi=\rm 4.81\;\times\;10^{-19} J - 2.71 eV\;\times\; \dfrac{1.60 \;\times 10^{-19} J}{1 eV}=6.34 \;\times 10^{-20}[/tex]

The power carried by all the electrons ejected is given as:

[tex]P_{e}=\rm (4.02\;\times\;10^1^5 s^{-1}) \;\times\; (6.34 \;\times\; 10^{-20} J)=0.255 \;mW[/tex]

The power carried by the electrons is 0.255 mW.

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Answer:

2.256 moles of oxygen atoms

Explanation:

CaCo3  is calcium carbonate

  every mole of calc carb has 3 moles of O atoms

  .752 moles of this has 3 times as many moles of Oxygen atoms

According to the mole concept , there are 2.256 moles of oxygen in 0.752 moles of calcium carbonate.

Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.

It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.

It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Molar mass has units of gram per mole . In case of molecules, where molar mass  in grams present in one mole  of atoms is its atomic mass.

As 1 mole of calcium carbonate has 3 moles of oxygen ,

∴ in 0.752 moles of calcium carbonate there are 0.752×3=2.256 moles.

Thus,there are 2.256 moles of oxygen in 0.752 moles of calcium carbonate.

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Answer:B

Explanation:

The metal spoon is a better thermal conductor. Hence, option B is correct.

A thermal conductor is a material that allows the energy in the form of heat, to be transferred within the material, without any movement of the material itself.

Metals are good conductors. Laying on the metal handle of the metal cooking pot. It appears that the pot is sitting on top of a campfire.

Since metal is a good conductor of energy, the spoon gets hot because heat is transferred through the metal pot to its handle, and then to the metal spoon.

Hence, option B is correct.

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Entropy change is the randomness of the thermodynamic system. The change in the entropy when the water is condensed is 1573 J/K.

An entropy change is a product of mass and the ratio of the enthalpy of vaporization to the temperature.

Given,

Enthalpy of vapourization =  2257 J/gK

The temperature in kelvin = 373 k

The change in entropy is calculated as:

[tex]\begin{aligned} \rm \Delta S &= \rm m (\dfrac{\Delta H_{vap}}{T})\\\\&= 260 (\dfrac{2257}{373})\\\\&= 1573.24\;\rm J/K\end{aligned}[/tex]

Therefore, the change in entropy is 1574 J/K.

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The enthalpy change for the reaction 2K + S + K2S using the following thermochemical reactions is mathematically given as

dn=70.7kg

Generally, the equation for the  Chemical reaction is mathematically given as

2k+s----->K2S

Therefore

KS+K----->K2S

Therefore

dn=dn1+dn2

dn=32.5+38.2

dn=70.7kg

In conclusion,  the enthalpy change is

dn=70.7kg

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When we convert 5000 grams of hydrogen into water, the mass of the water obtained is 45000 g

2H₂ + O₂ —> 2H₂O

Molar mass of H₂ = 2 g/mol

Mass of H₂ from the balanced equation = 2 × 2 = 4 g

Molar mass of H₂O = 18 g/mol

Mass of H₂O from the balanced equation = 2 × 18 = 36 g

SUMMARY

From the balanced equation above,

4 g of H₂ reacted to produce 36 g of H₂O

From the balanced equation above,

4 g of H₂ reacted to produce 36 g of H₂O

Therefore,

5000 g of H₂ will react to produce = (5000 × 36) / 4 = 45000 g of H₂O

Thus, 5000 g of H₂ is equivalent to 45000 g of H₂O

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Rules for naming ionic compounds with transition metal requires the elementary name of metal followed the anion name with suffix ide.

Ionic compounds are made up of ions, which are charged particles that occur when an atom (or group of atoms) acquires or loses electrons. Generally cations are metals and anions are non metals in it.

Following rules will be considered during naming:

Hence rules for naming are listed above.

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The model of atoms undergoing nuclear fission will decrease in size while that of atoms undergoing nuclear fusion will increase in size.

Radioactive decay is a process in radioactivity in which the nucleus of atoms spontaneously breakdown or decay to produce smaller atomic nucleus with the emission of radiation.

Nuclear fusion involves the merging together of the nucleus of two or more smaller atoms to produce a larger atom whereas nuclear fission is the splitting of the nucleus of larger atoms into smaller atomic nuclei.

Therefore, the model of atoms undergoing nuclear fission will decrease in size while that of atoms undergoing nuclear fusion will increase in size.

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Answer:

This is for the table

Explanation:

Sorry for my handwriting

4.9 moles of salt are required to be added to 1 kg water to change the boiling temperature

by 5°C.

Based on the given equation, the molality of the solution is calculated as follows:

Change in temperature = 5 °C

Kb = 0.51

i = 2

Molality = 5/0.51 × 2 = 4.9 molal

Also, Molality = moles/kg of water

Moles of salt = molality × kg of water

Moles of salt = 4.9 × 1 = 4.9 moles.

Therefore, 4.9 moles of salt are required to be added to 1 kg water to change the boiling temperature

by 5°C.

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Looking at the density of the penny which is 7.1347 g/cm³, it can be concluded that it is not made from copper.

It is the ratio of the mass of a substance to its volume.

Mathematically; density = mass/volume

In this case, the mass of the coin is 2.49 g, and the volume is 0.349 cm³. Thus:

Density of coin = 2.49/0.349 = 7.1347 g/cm³

The density of copper is 8.96 g/cm³ at room temperature.

Hence, the penny is not made of copper.

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1.137448506 mol moles of chlorine gas would occupy a volume of 35.5 L at a pressure of 100.0 kPa and a temperature of 100.0 degrees Celsius.

The ideal gas equation, pV = nRT, is an equation used to calculate either the pressure, volume, temperature or number of moles of a gas. The terms are: p = pressure, in pascals (Pa). V = volume, in [tex]m^3[/tex].

We apply the formula of the ideal gases, we clear n (number of moles); we use the ideal gas constant R = 0.082 l atm / K mol:

PV= nRT

Given data:

P=100.0 kPa =0.986923 atm

T=100 degree celcius= 100 + 273 =373 K

V=35.5 L

Substituting the values in the equation.

n= [tex]\frac{\;0,98 \;atm \;X \;35,5 \;L }{\;0,082\;atm / \;K mol \;X \;373 K}[/tex]

n= 1.137448506 mol

Hence, 1.137448506 mol moles of chlorine gas would occupy a volume of 35.5 L at a pressure of 100.0 kPa and a temperature of 100.0 degrees Celsius.

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Answer:

It comes from the sun.

Answer(s):

Template: reactants ⇒ products

1. [tex]Ag+KNO_3[/tex] ⇒ [tex]AgNO_3 + K[/tex]

2. [tex]Zn+AgNO_3[/tex] ⇒ [tex]Zn(NO_3)_2 + Ag[/tex]

3. [tex]Al + H_2SO_4[/tex] ⇒ [tex]Al_2(SO_4)_3 + H_2[/tex]

4. [tex]Cl_2+KI[/tex] ⇒ [tex]HCl + I_2[/tex]

5. [tex]Li + H_2O[/tex] ⇒ [tex]LiOH + H_2[/tex]

6. [tex]Cu + FeSO_4[/tex] ⇒ [tex]CuSO_4 + Fe[/tex]

7. [tex]Na + H_2O[/tex] ⇒ [tex]NaOH + H_2[/tex]

8. [tex]Fe+Pb(NO_3)_2[/tex] ⇒ [tex]Fe(NO_3)_2 + Pb[/tex]

9. [tex]Cu+H_2O[/tex] ⇒ [tex]CuO + H_2[/tex]

10. [tex]Cu+Al_2(SO_4)_3[/tex] ⇒ [tex]CuSO_4 + Al[/tex]

11. [tex]Al + Pb(NO_3)_2[/tex] ⇒ [tex]Al(NO_3)_3 + Pb[/tex]

What is a chemical equation?

A chemical equation consists of the chemical formulas of the reactants (on the left) and the products (on the right). The two are separated by an arrow symbol (“→” usually read aloud as “yields”). Each individual substance's chemical formula is separated from others by a plus sign.

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*: (=' :') this

•.. (,('')('') helped :)

Answer:

elliptical/ellipse

Explanation:

» Concepts

Astronomer Johannes Kepler discovered and founded his three laws of planetary motion. One of these laws states that the orbit of all planets, including Earth, is in an elliptical shape rather than a circle.

Answer:

3 mol

Explanation:

[tex] \frac{1.81 \times 10 {}^{24} \times C \times atoms}{6.022 \times {10}^{23}\times C \times atoms \times mol {}^{ - 1} } = 3 \: \: mol \\ [/tex]

The chemical equation between Ba(OH)2 and H2CO3 is Ba(OH)₂ + H₂CO₃ → BaCO₃ + 2 H₂O.

A balanced equation has the reactants are on the left side of the arrow, whereas the products are on the right.

The number in front of a chemical formula denotes the number of moles in a compound. The number of atoms in a single molecule is indicated by subscripts (numbers below an atom).

Thus, the chemical equation is Ba(OH)₂ + H₂CO₃ → BaCO₃ + 2H₂O.

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= 87 : 29

= 3 half lives

Answer: The disposal of radioactive waste.

               Is the most expensive source of energy.

               Nuclear electricity generation requires a lot of fuel.

Explanation: This are the main problems of Nuclear Electricity Generation.

Answer:

The light goes through

Explanation:

The light goes through the transparent glass without being reflected or absorbed, for example, a window is a transparent glass, you never see light being reflected off of a window

Hope this helps (:

Coltan, lumber and fossil fuels are all part of the resources that exists in the environment.

The term resources refer to those materials that we extract from the environment that can be used or our good. These resources could include minerals or energy raw materials.

However, coltan, lumber and fossil fuels are all part of the resources that exists in the environment.

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Answer B A B A

Explanation:

i got it right

Answer:

5.1622 mol This is the answer for your questions

The amount of sample of Plutonium-32 which is remained after 99.4 days is 3.9 grams.

Remaining amount of any substance after the decay will be calculated by using the below equation:

N = N₀[tex](\frac{1}{2})^{\frac{T}{t}}[/tex], where

N = remained quantity = ?

N₀ = original quantity = 499.2g

T = total time = 99.4 days

t = half life time = 14.2 days

T/t = 99.4/14.2 = 7

On putting all these values in the above equation, we get

N = (499.2)(0.5)⁷

N = (499.2)(0.0078) = 3.9g

Hence remaining mass of Plutonium-32 is 3.9 g.

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Answer:

long toes

Explanation:

the other traits are personality related, not a biological factor. they can be learned, but not inherited

The total question is not found here but the onion structures that we can see with 30 X are the cell wall and an important vacuole.

The 30X magnification does not exist, nowadays the current objective lens comes in 20X, and 40X.

Using this magnification, we might see plant cells that divide to produce  cell walls between daughter cells after a process called mitosis.

In conclusion, the total question is not found here but the onion structures that we can see with 30 X are the cell wall and an important vacuole.

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Answer: 167.2 J

Explanation:

Let's see

[tex]\\ \rm\Rrightarrow C_{12}H_{22}O_{11}[/tex]

[tex]\\ \rm\Rrightarrow 12(12)+22(1)+11(16)[/tex]

[tex]\\ \rm\Rrightarrow 144+22+176[/tex]

[tex]\\ \rm\Rrightarrow 166+176[/tex]

[tex]\\ \rm\Rrightarrow 342g/mol[/tex]