What is emitted in the nuclear transmutation, 2713Al(n, ?) 2411Na?
a a proton
b a gamma photon
c a neutron
d a beta particle
e an alpha particle

Answer:

It has direction and size.

Explanation:

All physical quantities are generally grouped into two;

i) Vector quantities

ii) Scalar quantities

Vector quantities are those quantities that has both magnitude (size) and direction.

Scalar quantities are those quantities that has magnitude (size) and no direction.

Velocity is a vector quantity because it has direction and size.

Answer: D

Explanation:

apex

Answer:

Option d is correct

Explanation:

The basis of the VSEPR model of molecular bonding is that to minimize repulsions, electron domains in the valence shell of an atom arrange on their own.

According to VSEPR theory, if there are two electron domains on a central atom, they will be arranged such that the angles between the domains are 180°

Answer:

25 grams of sugar

Explanation:

Answer:

Density is equal to mass divided by volume. So, in order to calculate the density of a penny, you need to first calculate its’ mass via a triple beam scale or a similar tool. Then you need to calculate its’ volume.

Explanation:

Answer:

The correct answer is (1). Zn has the highest electronegativity of all the metals in its column. It has a strong attraction for electrons and low ionization potential, so if potassium chloride were used instead of hydrochloric acid, potassium would react most readily.

Explanation:

This question is asking which metal will react most readily. According to the activity series, alkali metals are more reactive than alkaline earth metals. Magnesium has the lowest outer electron configuration of all the metals in its row on the periodic table so it will have a strong attraction for electrons. The magnesium atom therefore requires less energy to reach an outer energy level so it has the lowest first ionization potential. Therefore, magnesium will react most readily with HCl.

The number of moles of \(Al_2O_3\) formed when 5.0 moles of Al are used up would be 2.5 mol.

The balanced equation of the reaction would be as follows:

\(4AI +3O_2--- > 2Al_2O_3\)

From the balanced equation of the reaction, the mole ratio of Al that reacts to the \(Al_2O_3\) produced is 2:1.

Using this established mole ratio, the amount, in mols of \(Al_2O_3\) that would be formed when 5.0 mol of Al reacts completely would be calculated as follow:

2 mol Al = 1 mol \(Al_2O_3\)

5.0 mol Al = 5.0 x 1/2

                  = 2.5 mol

2.5 mol to the tenth's place = 2.5 mol

In other words, the amount of \(Al_2O_3\) that would be formed is 2.5 mol.

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As a result, the gas will be about 205 kelvin, or -68.5 degrees Celsius, in temperature.

If a gas's temperature is increased to 927°C, so its pneumatic cylinder will be. A gas has a temperature of 127°C at 2 atm and 2 litres of volume. O 6 atm.

One mole ($6.023 times 1023 typical particles) of the any gas at STP takes up 22.4L of space. A mole of any gas takes up 22.4 litres at standard pressure and temperature (273K and 1atm).

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Rhizobium bacteria were soil microbes that have the ability to convert dissolved nitrogen from the atmosphere. These root nodules on woody plants contain rhizobium bacteria.

The nitrogen cycle is finished by denitrification, which turns nitrate (NO3-) back into gaseous nitrogen (N2). The driving force behind this procedure is denitrifying microorganisms. These bacteria generate energy from nitrate rather than oxygen, which results in the release of nitrogen gas into the environment.

Azotobacter, Bacillus, Clostridium, or Klebsiella species are a few instances that belong to this category of nitrogen-fixing bacteria. These organisms must acquire their own energy source, as was previously said. Typically, they do this by oxidising organic molecules generated by the other organisms or as a result of decomposition.

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Answer:  Hello!

first i believe we need a balanced equation to start...

i got 2H2 + 1O2 = 2H2O

This tells us that we need 2 moles of H2 for every 1 mole of O2 Since we only have 1 mole of H2 compared to the 5 moles of O2 hydrogen is the limiting reagent. For illustration, divide the balanced equation by 2 in order to get 1 mole of H2 If we start with 1.0 moles of H2 we'll produce 1.0 mole of H2O

Your welcome <3

Explanation:

Answer:

Homogeneous mixture because chocolate can disolve

Therefore, heterogeneous mixture contains mixture that are uniform in composition

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Answer:

Last option is the correct choice.

Explanation:

Number of protons = 60-33 = 27

Superscript 60 Subscript 27 upper C o.

Best Regards!

yeah, its D. 60/27Co

The theoretical yield of NH3 is 10.03 g and percent yield is 10.56%

The theoretical yield is obtained from the eequation if reaction.

The equation of the reaction is given below:

moles of reactants and products:

moles of H2 = 1.77/2 = 0.885 moles

moles of N2 = 25.7/28 = 0.918 moles

moles of NH3 = 1.06/17 = 0.062

From the equation of the reaction, H2 is the limiting reactant

3 moles of H2 produces 2 moles of NH3

0.885 moles of H2 will produce 2/3 × 0.918 = 0.59 moles of NH3

Therefore:

theoretical yield = 0.59 × 17

theoreticalyield = 10.03 g of NH3

Percent yield = 1.06/10.03 × 100%

percent yield = 10.56%

Therefore, the theoretical yield is 10.03 g and percent yield is 10.56%.

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Answer:

Forests prevent desertification.

Explanation:

Answer:

salad

Explanation:

Answer:

You protect yourself and others from numerous injuries. Such safety equipment would be goggles, tongs, gloves(sometimes), hair pulled back, sleeves rolled up, etc.

Explanation:

Explanation:

0.5×0.8=(3.0×4.0) × 160

Answer/Explanation:

A higher temperature causes the molecules in a substance to move faster in a chemical change. This increased speed allows the particles to have enough force for a chemical change and it also increases the amount of times a particle hits another this makes it faster for it to combine.

K and L values for each substance are 108g and 18g, respectively.

Solubility is the formation of a new bond between solute molecules and solvent molecules. Solubility is the maximum concentration of solute that dissolves in a known concentration of solvent at a given temperature in terms of quantity.

We calculated the solubility of NaCl in 100g of water to be 36g.

Lead Nitrate solubility in 100g water = 54g

Determine the value of L:-

200Kg sodium chloride solubility = 36g

100kg Sodium chloride Solubility = \(\frac{36g}{100kg} *200kg\) = 18g

Determine the value of K:-

100Kg Lead Nitrate Solubility = 54g

200kg Lead Nitrate Solubility = \(\frac{54g}{100kg} *200kg\) = 108g

Solubility difference = solubility of K - solubility of L

Solubility difference = 108g - 18g = 90g

Thus, the 108g and 18g, are the values for K and L respectively.

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road transport

hope it helps...!!!

Answer:

1. road

2. It evenly

3. system, subsystem, componet

4. control

5. combustion.

Hope this is helpful

The correct answer is -24.3°C.

What is Thermal expansion?

Thermal expansion refers to the process whereby an object increases in size as a result of temperature changes. Since most materials expand when heated and contract when cooled, this phenomenon is commonly observed. When materials are heated, they expand; as they are cooled, they contract. Because of the way molecules interact with one another, the expansion and contraction of materials are linked to changes in their internal energy. Consideration of thermal expansion is essential when designing everything from buildings to bridges and from satellites to coffee cups.

Explanation:We'll use the formula for linear thermal expansion to calculate the temperature change.ΔL = αLΔT,

whereΔL = change in length

L = original length

ΔT = change in temperature

α = coefficient of linear expansion

The formula can be rearranged to solve for ΔT.ΔT = ΔL / αL

From Table 5.2 in the eBook, the coefficient of linear expansion for aluminum is 24.0 × 10^-6 (°C)^-1.ΔL = 1 mm = 0.001 mL = 26 mΔT = ΔL / αLΔT = (0.001 m) / (24.0 × 10^-6 (°C)^-1 × 26 m)ΔT = 16.03°C

Now, we must find the temperature at which the aluminum wing is 1 mm shorter.

ΔT = T2 - T1ΔT = (T2 - 24.3°C) = 16.03°CT2 = 40.33°C -24.3°C = T2 - 24.3°CT2 = -24.3°C + 40.33°CT2 = 16.03°C

Therefore, at -24.3°C, the aluminum wing on a passenger jet is 1 mm shorter.

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The average temperature of our planet, accounting for the greenhouse effect, is approximately 254.9 K, -18.2 °C, and -0.3 °F.

The average temperature of our planet can be determined by considering the heat flux due to the greenhouse effect and the Earth's temperature as a black body.

To calculate the average temperature, we first need to convert the heat flux from watts per square meter (W/m2) to watts (W). Since the Earth's surface area is approximately 510 million square kilometers, we can multiply the heat flux by this value to obtain the total heat input.

Next, we need to account for the Stefan-Boltzmann law, which states that the power radiated by a black body is proportional to the fourth power of its temperature. By equating the power radiated to the total heat input, we can solve for the temperature.

Using this information, we can now calculate the average temperature.

First, convert the heat flux from 150 W/m2 to watts:
150 W/m2 * 510,000,000 km2 = 76.5 × 10^12 W

Next, apply the Stefan-Boltzmann law:
σ * T^4 = 76.5 × 10^12 W
Where σ is the Stefan-Boltzmann constant (approximately 5.67 × 10^-8 W/m2K4).

Rearranging the equation and solving for T, we find:
T^4 = (76.5 × 10^12 W) / σ
T ≈ (76.5 × 10^12 W / 5.67 × 10^-8 W/m2K4)^(1/4)
T ≈ 254.9 K

Converting the temperature to Celsius:
C = T - 273.15
C ≈ -18.2 °C

Converting the temperature to Fahrenheit:
F = (T * 9/5) + 32
F ≈ -0.3 °F

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Since all species appear on both side of the ionic equation, there was no reaction.

Same ions present in both side of complete ionic equation are omitted to write net ionic equation. These ions are called the spectator ions.

first step - write down molecular equation as follows:

Al(C2H3O2)3(aq) + 3LiNO3 (aq) --> 3Li(C2H3O2)(aq) + Al(NO3)2(aq)

second step - write complete ionic equation;

Al3+ (aq) + 3(C2H3O2)^- (aq) + 3Li^+(aq) + 3N03^-(aq) -----> 3Li^+(aq) + 3(C2H3O2)^-(aq) + Al^3+(aq) + 3N03^-(aq)

You can see that all ions that appeared on the left hand side of the reaction equation also appeared on the right hand side of the reaction equation, thus thet are omitted. Hence there was no reaction.

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The statement that would best explain the observation of no liquid being evident in the sealed bottle is: b. Liquid and vapor are at equilibrium in the bottle.

When liquid and vapor are at equilibrium in a closed system, it means that the rate of condensation (liquid turning into vapor) is equal to the rate of vaporization (vapor turning into liquid). In this case, it appears that all the liquid has vaporized, and no liquid is evident. This suggests that the liquid and vapor have reached a state of equilibrium, where the amount of liquid remaining is negligible compared to the amount of vapor present.

The vapor state is favored when equilibrium is established because the pressure exerted by the vapor phase reaches a point where it equals the vapor pressure of the liquid at that temperature. At this equilibrium point, no further net condensation or vaporization occurs, resulting in the absence of visible liquid in the sealed bottle.


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A student put a 10 g iron nail into 100 g of water. The initial temperature of the nail was 922 ⁰C

According to the law of conservation of heat energy:

   released heat = received heat

The amount of released or received heat energy is given by:

Q = c m Δt

Where:

c = specific heat

m = mass

Δt = temperature difference

In the given problem, the nail releases heat while the water receives heat.

Released heat: (nail)

Q1 =  c m Δt

   = 464 x 0.010 x (tn - 20)

   = 4.64 tn - 92.8

Where tn is the initial temperature of the nail.

Received heat: (water)

Q2 =   c m Δt

     = 4186 x 0.1 x (20 - 10)

     =  4186  

released heat = received heat

4.64 tn - 92.8 =  4186

4.64 tn = 4,278.8

tn = 922

Hence, the initial temperature of the nail is 922 ⁰C

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Answer:

PLEASE MARK ME AS THE BRAINLIEST

Explanation:

According to the 2n2 rule, the maximum number of electrons in the third period = 2 x (3)2 = 18. But, the last shell cannot accommodate more than 8 electrons so, the number of electrons in third period is 8. Hence, the number of elements is also 8.

Answer:

either bacterial cells or plant cells but I think bacterial

Explanation:

from google: Bacteria are single celled microbes. Bacteria are classified into five groups according to their basic shapes: spherical (cocci), rod (bacilli), spiral (spirilla), comma (vibrios) or corkscrew (spirochaetes). ... They can exist as single cells, in pairs, chains or clusters.

- cannot be human or mouse cells as both are animals and animal cells do not have cell walls

The following statements on HPLC modes are true is more polar compounds elute first in normal-phase HPLC (Option E).

The liquid chromatography (HPLC) is a technique in analytical chemistry employed for the separation, identification, and quantification of elements. It is considered a highly sensitive method, and it works by separating the components in a mixture with the assistance of a solvent under high pressure.

There are two modes of HPLC: Reversed-Phase HPLC (RP-HPLC) and Normal-Phase HPLC (NP-HPLC). In RP-HPLC, a nonpolar stationary phase, such as C18, is used, and polar solvents, such as water, are used as mobile phases. Polar stationary phases, such as silica gel, are used in NP-HPLC, while nonpolar solvents, such as hexane, are used as mobile phases.

More polar compounds have a greater affinity for the polar stationary phase than less polar compounds, which have a higher affinity for the nonpolar mobile phase in NP-HPLC. As a result, less polar compounds elute first in normal-phase HPLC.

Thus, the correct option is E.

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