A certain rifle bullet has a mass of 6.93 g. Calculate the de Broglie wavelength of the bullet traveling at 1649 miles per hour.

Answer:

Empirical Formula = Al3O4 .

Explanation:

Mass of Aluminium = 0.3000 g

Mass of Oxygen in oxide = 0.5333 g - 0.3000 g = 0.2333 g

Moles of Aluminium = Mass / MOlar Mass = 0.3000 g / 27 g = 0.01112 moles

Moles of Oxygen = Mass / Molar Mass =0.2333 g / 16 g = 0.01458 moles

Now we will divide each of the molar quantities by the smallest number of moles.

Aluminium : 0.01112 moles / 0.01112 moles = 1

Oxygen : 0.01458 moles/ 0.01112 moles =1.31

Since, the ratio between Al and O is 1:1.31 which is not the smallest whole numebr ratio. SO, we will multiply it by the smallest number to get whole number ratios.

So, Here on multiplying the ratio by 3 ,we get Al : O = 3:4.

The experimental empirical formula of the aluminum oxide is Al₂O₃.

To determine the empirical formula of the aluminum oxide, we need to calculate the mole ratios of aluminum (Al) and oxygen (O) based on the given masses.

Convert the masses of aluminum and aluminum oxide to moles:

Determine the mole ratio of Al to Al₂O₃:

Simplify the mole ratio to obtain the empirical formula:

It is important to note that the given experimental data and the resulting empirical formula are based on the assumption that the reaction went to completion and that the measurements were accurate. Further confirmation and analysis, such as using additional experimental techniques or calculations, may be necessary to verify the empirical formula.

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Reverse the sign of the second equation, change the sign of the enthalpy and add. Option B

The enthalpy could be obtained by the use of the Hess law of constant heat summation. As such, we have a number steps and it is possible for use to obtain the enthalpy of the final reaction as shown by a series of manipulations.

By inspection, we can see that, if we desire to obtain the enthalpy of the final reaction as shown, then we have to reverse the sign of the second equation, change the sign of the enthalpy and add. Option B

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Answer:

I think it was when she caught him talking to his "child"

The planet that would have a diameter of approximately 12 cm is Saturn.

A scale model is a model which is used to represent another object using a given scale.

Scale models can be used to make small object bigger or larger objects smaller.

Considering the scale model of the planets where  1 centimeter (cm) is equal to 10,000 kilometers (km);

1 centimeter = 10,000 kilometers

12 centimeter = 1.2 × 10⁵ kilometers

The planet with a diameter of approximately 1.2 × 10⁵ kilometers is Saturn.

In conclusion, scale models are used to model objects.

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Answer:

[tex]5.4198[/tex] × [tex]10^{24}[/tex] atoms of hydrogen

Explanation:

Firstly, we need to know how many atoms of [tex]NH_{3}[/tex] are there in 3 moles of [tex]NH_{3}[/tex].

We know that there is [tex]6.022[/tex] × [tex]10^{23}[/tex] atoms in a mole of any substance.

[tex]6.022[/tex] × [tex]10^{23}[/tex] is Avogadro's Constant

[tex]6.022[/tex] × [tex]10^{23}[/tex] × 3 =  [tex]1.8066[/tex] × [tex]10^{24}[/tex]

Therefore in 3 moles of ammonia, there are [tex]1.8066[/tex] × [tex]10^{24}[/tex] atoms.

Next, you should determine how many molecules of an element is present in ammonia.

There is 1 Nitrogen molecule and 3 Hydrogen molecules for every mole of ammonia.

Finally, since we know 3 moles of ammonia contains [tex]1.8066[/tex] × [tex]10^{24}[/tex] atoms, we just have to multiply accordingly to get the individual amount of atoms of an element a compound has.

For Nitrogen :

1 × [tex]1.8066[/tex] × [tex]10^{24}[/tex] =  [tex]1.8066[/tex] × [tex]10^{24}[/tex] atoms of nitrogen

For Hydrogen :

3 ×  [tex]1.8066[/tex] × [tex]10^{24}[/tex] =  [tex]5.4198[/tex] × [tex]10^{24}[/tex] atoms of hydrogen

Therefore, there is [tex]5.4198[/tex] × [tex]10^{24}[/tex] hydrogen atoms in 3 moles of ammonia.

The most accurate measurement is 1.1 g. Option A

The term accuracy refers to the fact that the measurement is close to the true value. The closer the measurement is to the true value as given, the more accurate it is.

In this case, the true value of the mass of the  sample of calcium carbonate is 1.134 g. Now we have to look at all the masses of as obtained by Emma during the experiment.

The most accurate measurement is 1.1 g. Option A

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For 5.43 g/mL and 5.44 g/mL =  0.01 the least diff and most precise.

First of all, precision is determined by the difference in the two obtained values. If the difference between the two values obtained is less, then precision is more. If the difference between the two values obtained is more, then precision is less.

For 5.43 g/mL and 5.44 g/mL , we can see that the difference between these two data is 0.01

For 7.98 g/mL and 7.91 g/mL , we can see that the difference between these two data is 0.07

For 7.65 g/mL and 7.64 g/mL , we can see that the difference between these two data is 0.01

For 7.06 g/mL and 7.03 g/mL , we can see that the difference between these two data is 0.03

As we can see that, the most difference between the data is 0.07 between 7.65 g/mL and 7.64 g/mL and thus, they are least precise.

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One molecule of sucrose is burned with oxygen to make carbon dioxide and water.

Disaccharide sugar sucrose is composed of glucose and fructose. It is produced naturally by plants and is the main component of white sugar. C₁₂H₂₂O₁₁ is the chemical formula for it.

Extraction and refining sucrose for human use can be done from either sugarcane or sugar beet. Raw sugar is created from crushing the cane, which is consistently delivered to other sectors to be refined into pure sucrose. Sugar mills generally are located in the tropical regions near the sugarcane plantations.

                   C₁₂H₂₂O₁₁ + 12O₂  →  12CO₂ + 11H₂O

When one molecule of sucrose is burnt, we get 12 carbon dioxide molecules.

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The correct answer for emperical and molecular formula = C5H14N2 .

3.23 g x (12.011 / 44.0098) = 0.8815 g carbon

1.865 g x (2.016 / 18.0152) = 0.2087 g Hydrogen

1.58 g x (28.014 / 108.009) = 0.4098 g Nitrogen

1.50 g minus (0.8815 + 0.2087 + 0.4098) = 0.

Convert each element's mass to moles.

0.8815 g/12.011 g/mol = 0.0734 mol carbon

0.2087 g 1.008 g/mol = 0.207 mol Hydrogen

0.4098 g 14.007 g/mol = 0.02926 mol Nitrogen

Step three is to calculate the ratio of molar amounts expressed in the smallest, whole numbers.

0.0734 mol 0.02926 mol = 2.51 carbon

7.07 mol hydrogen = 0.207 mol 0.02926 mol

Nitrogen: 0.02926 mol = 1 Nitrogen: 0.02926 mol = 1

Doubling each value yields C = 5, H = 14.14, and N = 2, resulting in the empirical formula C5H14N2. 

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1. The limiting reactant is CuCl₂

2. The theoretical yield of copper is 0.24 g

2Al + 3CuCl₂ —> 2AlCl₃ + 3Cu

The following were obtained from the balanced equation:

From the balanced equation above,

54 g of Al reacted with 403.65 g of CuCl₂ to produce 190.65 g of Cu

From the balanced equation above,

54 g of Al reacted with 403.65 g of CuCl₂

Therefore,

0.5 g of Al will react with = (0.5 × 403.65) / 54 = 3.74 g of CuCl₂

From the above calculation, we can see that a higher amount (i.e 3.74 g) of CuCl₂ than what was given (i.e 0.5 g) is needed to react completely with 0.5 g of Al.

Thus, CuCl₂ is the limiting reactant.

From the balanced equation above,

403.65 g of CuCl₂ reacted to produce 190.65 g of Cu

Therefore,

0.5 g of CuCl₂ will react to produce = (0.5 × 190.65) / 403.65 = 0.24 g of Cu

Thus, the theoretical yield of Cu is 0.24 g

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Two molecules of hydrogen gas combine with 1 molecule of oxygen gas to form 2 molecules of water.

A word equation is one in which the equation that is shown in the reaction is written in words rather than by the use of the chemical symbols of the elements that are involved.

We have the reaction; [tex]2H_{2} (g) + O_{2} (g) ---- > 2H_{2} O(l)[/tex], in order for this reaction to be written in the word equation form we have; Two molecules of hydrogen gas combine with 1 molecule of oxygen gas to form 2 molecules of water.

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The molecular weight of  urea [tex]((NH_{2} )_{2} CO)[/tex] , a compound used as a nitrogen fertilizer, is 60 amu .

We may determine the atomic weights of the elements using their periodic tables, and we discover that hydrogen has an atomic weight of 1, while that of oxygen is 16. We sum the contributions from each atom to determine the molecular weight of one water molecule, which is 2(1) + 1(16) = 18 grams/mole.

The molecular weight of urea [tex]((NH_{2} )_{2} CO)[/tex] is calculated as ,

The atomic weight of carbon ( C ) = 12

The atomic weight of nitrogen ( N ) = 14

The atomic weight of oxygen ( O ) = 16

The atomic weight of hydrogen ( H ) = 1

[tex]((NH_{2} )_{2} CO)[/tex] = 2 × ( 14 + 2 ) + 12 + 16 = 60 g / mole .

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The correct answer is 329.4 Cal.

Remember that specific heat is the ratio of the amount of heat needed to raise a body's temperature by one degree compared to the amount of heat needed to raise the temperature of an equivalent mass of water by one degree, or that specific heat capacity is the amount of heat energy needed to raise a material's temperature by one kelvin (K) per kilogramme.

Mass of sample=50.00-g

Specific heat of metal=0.108 cal/g °C

Change in temperature=78.0 °C-17.0°C=61.0°C

Heat Released by metal can be calculated as follows:

Heat Released = Mass of sample  x Specific heat x  Change in temperature

Heat Released = 50.00 g x  0.108 cal/g °C x 61.0°C

Heat Released = 329.4 Cal

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If the statue has a volume of 4.9m^3 and the density of marble is 2.76g/cm^3 then, the mass of the statue is 0.563 kg.

ρ = m / V

where,

ρ =  density

m = mass

V = volume

As given in the equation,

ρ is 2.76g / cm³

V is 4.9m³

So by using the formula,

ρ = m / V

we have,

2.76g / cm³ = m / 4.9m³

m = 2.76 / 4.9

m = 0.563 kg

Volume is a measurement of the amount of three-dimensional space that is occupied. It is frequently numerical quantified using SI-derived units or various imperial units. The definition of length is linked to the definition of volume. In contrast, the mass and density formula is rho = m / V.

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Answer:

It is dangerous because it can be harder to drive the car.

Explanation:

Any alterations in your car can void some of your warranties and may also pose some safety concerns. It is also illegal as well.

Answer:

Na2O is more basic. The reasoning for this is because the basis of periodicity going from bottom to lower basicity is increase.

Answer: my answer would be a

Explanation: so i did some research and all of it came up with the answer (A).

c) Chemical, Combustibility/Reaction Iron reacts with Sulphur to give heat and a flame.

Iron sulphide, a chemical, is created when you burn iron and sulphur together. A series of chemical compounds comprised of iron and sulphur is referred to as iron sulphide, or simply iron sulphide. The chemical molecule and mineral known as iron sulphide, sometimes known as iron(II) sulphide, has the formula FeS.

Incandescence is the process of a solid emitting light after being heated till it glows or emits light. The colour of an iron bar when warmed to a very great temperature changes from red to white as the temperature increases.

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Considering the defintion of area of a rectangle and definition of density, you obtain the following areas and densities:

a. the area of the rectangle is 9×10⁻¹ cm².

b. the area of the rectangle is 5×10⁻²cm².

c. the density of the substance is 3×10⁶ g/cm³.

d. the density of the substance is 0.2 g/cm³.

A rectangle is a flat geometric figure with four sides, of which two sides that are opposite parallel to each other have the same length and the remaining two have another length.

The area of a rectangle is the product of the two contiguous sides of the rectangle:

Area of a rectangle= a×b

where a and b are the measures of the two sides.

Density  is a quantity that allows us to measure the amount of mass in a certain volume of a substance.

The expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

density= mass÷ volume

In this case, you know that the rectangle has:

Then, the area of the rectangle can be calculated as:

Area of the rectangle= 3×10¹ cm× 3×10⁻² cm

To multiply numbers in scientific notation, you multiply the numbers that are not powers of 10 and add the exponents that are powers of ten. In this case:

Area of the rectangle= (3× 3)×10¹⁻² cm²

Area of the rectangle= 9×10⁻¹ cm²

Finally, the area of the rectangle is 9×10⁻¹ cm².

In this case, you know that the rectangle has:

Then, the area of the rectangle can be calculated as:

Area of the rectangle= 1×10³ cm× 5×10⁻¹ cm

Solving

Area of the rectangle= (1× 5)×10³⁻¹ cm²

Area of the rectangle= 5×10⁻²cm²

Finally, the area of the rectangle is 5×10⁻²cm².

In this case, you know:

Replacing in the definition of density:

density= 9×10⁵ g÷ 3×10⁻¹ cm³

Solving:

density= 3×10⁶ g/cm³

Finally, the density of the substance is 3×10⁶ g/cm³.

In this case, you know:

Replacing in the definition of density:

density= 4×10⁻³ g÷ 2×10⁻² cm³

Solving:

density= 0.2 g/cm³

Finally, the density of the substance is 0.2 g/cm³.

In summary, you obtain the following areas and densities:

a. the area of the rectangle is 9×10⁻¹ cm².

b. the area of the rectangle is 5×10⁻²cm².

c. the density of the substance is 3×10⁶ g/cm³.

d. the density of the substance is 0.2 g/cm³.

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The correct answer is 45.21 g.

This issue will be resolved with the aid of the idea that chemical equilibrium is the rate of reversible processes at which the concentration of the reactants and products does not vary over time. The rate of reaction is exactly proportional to the raised to the power equal to the relevant stoichiometric coefficient, states the law of mass action.

Bromine monochloride is created when 31.5 grammes of bromine and 14.0 grammes of chlorine react.

Br2 + Cl2 ---> 2BrCl

mol Br2= 31.5/160g/mol= 0.196mol

mol Cl2= 14g/70.906g/mol= 0.197mol

Number of moles of BrCl formed = 2×0.196= 0.392 mol.

mass BrCl= 0.392 mol x 115.357g/mol= 45.21 g

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Taking into account the definition of density, the volume of 1.95 kg of alcohol is 2.6083 quarts.

Density is a quantity that allows us to measure the amount of mass in a certain volume of a substance.

The expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

density= mass÷ volume

It can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.

In this case, you know that:

Replacing in the definition of density:

0.79 g/mL= 1950 g÷ volume

Solving:

0.79 g/mL ×volume= 1950 g

volume= 1950 g÷ 0.79 g/mL

volume= 2468.35 mL= 2.6083 quarts (being 1 mL= 0.00105669 quarts)

In summary, the volume of 1.95 kg of alcohol is 2.6083 quarts.

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Answer:

1 - Crime Scene Analysis

2 - Conducting Interviews

3 - Surveillance

4 - Interrogation

5 - Developing Other Sources of Information

Explanation:

1 - Judy and Nick investigate the limousine where the attack occurred, discovering polar bear fur.

2 - Judy and Nick interview the elephant Yoga Instructor (really the Yak) at the Mystic Spring Oasis.

3 - Judy and Nick watch Zootopia Traffic Network surveillance in the Assistant Mayor's Office to discover where the "Night Howlers" were going.

4 - Judy interrogates the weasel who stole the onions earlier in the movie with the help of Mr. Big threatening to ice him.

5 - Judy uses leverage to force Nick Wilde to help in the investigation. Nick provides another source of information with his connection to his friend Flash at the Department of Mammal Vehicles who runs their plate number.

*These Investigation Techniques are defined in the study "CRIMINAL INVESTIGATION TECHNIQUES" listed on the U.S. Department of Justice Office of Justice Programs website*

The electronic configuration 1s2,2s2,2p6,3s2  belongs to Magnesium.

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The following best describes a community

community is best describes as  An interacting group of populations that occupy the same area

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Answer:

Explanation:density=mass×volume

so your answer will be 14.7×6.6=97.02

Answer:copper,stainless steel,iron,diamond,oak,calk,air

Explanation:your metlas is your meterials that absorbs most heat'

The Density of the copper is 8.91 g/cm³.

The density of a substance is obtained from the ratio of the mass and the volume of the substance.

The formula of density is given below:

The mass of the copper is 17.11 g

The volume of the rectangular piece of copper is calculated as:

volume = length * breath * height

Volume of the rectangular piece of copper = (2.13 * 0.79 * 1.14) cm³

Volume of the rectangular piece of copper = 1.92 cm³

Density of the copper = 17.11 g/1.92 cm³

Density of the copper = 8.91 g/cm³

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The specific heat capacity of a substance, also known as the massic heat capacity or massic heat capacity in thermodynamics, is the heat capacity of a sample of the substance divided by the mass of the sample. So, the energy gain by sample will be 506J

We know that, the heat energy gained will be calculated by the formula,

Q=mcΔT

where,

Q= Heat energy gained

m=mass

c= specific heat capacity

ΔT= Change in temperature

So, Given,

m= 5.00g ,

ΔT= 419K -306K= 113K

c= 0,897J/gK

Q=mcΔT

Q= 5.0×0.897×113

Q= 506J

So, the energy gained by sample of Aluminum will be 506 J when it is warmed from 306 K to 319K , in which temperature difference is 113K

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