in the Bohr model of the atom, in which orbit is an electron in its lowest energy state?
a. in the orbit closest to the nucleus
b. in the orbit farthest from the nucleus
c. in the electron cloud
d. midway between two orbits

The infant weighing 25 lb would be given 5.67 mL of Ibuprofen suspension.

Chemistry defines suspension as a heterogenous combination, which means that when two dissimilar substances are combined, particularly a solid, they do not mix equally.

The weight of the child is converted from pound to kilogram

1 pound = 0.453592 kg

25 pounds = 0.453592 × 25 = 11.34 kg

Amount in mg of Ibuprofen needed by the baby exists;

11.34 kg ×  10 mg/kg = 113.4 mg

In the Ibuprofen suspension, 100 mg exists present in 5.0 mL

113.4 mg will be present in 113.4 mg × 5 mL/100 mg = 5.67 mL

Therefore, the infant weighing 25 lb would be given 5.67 mL of Ibuprofen suspension.

The complete question is:

An infant ibuprofen suspension contains 100 mg/5.0mL suspension. The recommended dose is 10 mg/kg body weight. How many milliliters of this suspension should be given to an infant weighing 25 lb ?

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Answer:

wrapping the coil around a piece of iron (such as an iron nail)

adding more turns to the coil.

increasing the current flowing through the coil.

I forget the last one

Explanation:

Tighten the wire coils. The more times the wire coils in a given length of solenoid, the stronger the electromagnetic field will be. For instance, if your copper wire is coiled 100 times around a 2-inch iron nail, try to push the coils closer together and wrap the wire a few more times around the nail.

Explanation:

In a horizontal pipe, a fluid (liquid or gas) flows from one end to the other.

A horizontal pipe refers to a pipe that is installed parallel to the ground, where the pipe's diameter and length are the same. When fluid flows through a horizontal pipe, the pressure drop is constant along the length of the pipe. The pressure drop in the pipe is directly proportional to the length of the pipe, the density of the fluid, and the flow velocity of the fluid.

The following is the formula to compute the pressure drop in a horizontal pipe. Δp = ρgLWhere:Δp is the pressure dropρ is the fluid density is the acceleration due to gravity is the length of the pipe not that when the velocity of the fluid is increased, the pressure drop across the pipe will also increase. Similarly, if the fluid's viscosity is increased, the pressure drop across the pipe will also increase. In addition, the pressure drop across the pipe is directly proportional to the pipe's length.

Therefore, if the pipe's length is increased, the pressure drop across the pipe will also increase.

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Answer:

C

Explanation:

There are 5 valence electrons

Answer:

5

Explanation:

simply add exponents of the highest energy level (the big number in the front says what energy level it is in)

Answer:

Helium is lighter than Hydrogen and Helium is a much safer gas.

Answer:

Helium gas is known to be very light which makes it a preferred choice to hydrogen. Helium has low boiling point, low density, low solubility, high thermal conductivity and inertness. Since it is less dense, it is considered suitable for filling balloons.

A decomposition reaction is the breakdown of reactants into two or more products. The concentration of dinitrogen pentoxide after 4 minutes will be 1.63 moles.

The first-order rate constant (k) is the order of the reaction that is the initial rate and is given as 1/s.

The first order is shown as:

\(\rm [ln] A = \rm ln [A]_{o} - kt\)

Given,

Initial concentration = 0.013 M

k =  \(6.82 \times 10^{-3}\;\rm s^{-1}\)

t = 240 seconds

Substituting values above:

\(\begin{aligned} \rm [ln] A &= \rm ln[0.013] - 9 6.82\times 10^{-3} \times 240)\\\\[A] &= \rm e^{ln[0.013]} - (6.82 \times 10^{-3} s^{-1} \times 240 s)\\\\& = 1.6238\end{aligned}\)

Therefore, 1.63 moles will remain after 4 minutes.

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Answer:

matter should be the answer

Explanation:

Hope this helps!

Answer:

matter because matter makes up everything in the world EVERYTHING like this computer ri am typing on? matter. what ever device you are using to view this? matter. everything is made of matter. matter is starting to sound weird now so I'm gonna stop saying it and this is the end of the answer remember THAT ANSWER IS MATTERR!!!!!

Answer:

Explanation:

Thus the chemical formula for aluminium permanganate is formed by cross exchanging the coefficient of valencies of aluminium and permanganate (with each other). Thus the chemical formula for aluminium permanganate is represented as : Al(MnO4)3.

One way to measure the volume of an irregular object (a rock in your case) is to completely submerge it in water and measure the change in height of the water level. This change in water level (let's say from 50ml to 65ml) indicates that the volume of the stone is 15ml.

The volume of the stone depends on the size of the stone. Since rocks are irregularly shaped bodies, their volume is easily determined by the displacement of water. When an object is placed in water, the amount of water displaced by the object is equal to the volume of the object. Density is an important property of rocks as it helps identify the type of rock and its geological structure.

To calculate the density of a rock, we need to divide the rock's mass by its volume. The latter can be determined by placing the rock in a graduated cylinder filled with water.

Add 30ml of water to the graduated cylinder. 30 ml is the starting water volume. Carefully put the stone into the water. You will see the water level in the graduated cylinder rise. Suppose that the water level rises to 50 ml when a stone is added. 50 ml is the final volume of water.

To find the volume of the stone, subtract the initial water volume from the final water volume: 50ml - 30ml = 20ml. So the volume of the rock will be 20 ml or 20 cm³.

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Actually the main difference:

Homogeneous mixture is a mixture consisting of constituent substances that are mixed evenly.  As a result, each part of the mixture has the same properties

 In contrast to heterogeneous mixtures where the constituent substances are not mixed evenly.  Thus, there are parts of the mixture that have different properties.

Differences between Homogeneous and Heterogeneous Mixtures in detail

1. Differences Between Homogeneous and Heterogeneous Mixtures Based on Their Definitions

Homogeneous is a mixture that is uniform in all its parts and forms a single phase.  An example of a homogeneous mixture is air.  In addition, homogeneous mixtures can also be commonly referred to as solutions.

Meanwhile, heterogeneous mixture is a mixture that is not similar or not uniform, and the formation of two or more phases, as well as the existence of a clear boundary between the phases.  Examples of heterogeneous mixtures include oil and water, a mixture of lime and sand, then a mixture of iron powder and carbon, and many others.

2. Differences Between Homogeneous and Heterogeneous Mixtures Based on Their Characteristics

The characteristics of this homogeneous mixture are in the form of constituent particles that cannot be distinguished from one another, have almost the same color, and have a similar taste.  Not only that, substances that have been mixed have the same ratio, have the same concentration level, and are in the form of solids, gases, and liquids.

And this mixture cannot be separated, if you use a mechanical method, but you can separate it when you use a more difficult method.  The example of such separation is similar to that of distillation.  That is one of the differences between homogeneous and heterogeneous mixtures based on their characteristics.

3. Difference between Homogeneous and Heterogeneous Mixtures Based on Their Properties

The nature of this homogeneous mixture has the property that if every part of a homogeneous mixture is often the same, both in terms of color, taste, and comparison.  An example of the nature of the homogeneous mixture is a spoonful of sugar dissolved in water.

While the nature of a heterogeneous mixture is a mixture of two or more substances, which have properties, the constituent substances are not the same or the alias is not uniform.  So that the two mixed substances can still be distinguished by the particles.

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Answer:

mutation

Explanation:

Answer:

lol don't know please don't report me

Answer:

. 8 CO(g) + 17 H2(g) 1 C8H18(l) + 8 H2O

Explanation:

Answer:

Explanation:

this is a decomposition reaction because here a compound is broken into two two parts.

Answer:

B

Explanation:

Balanced equations have the same number of elements on both sides. If the number of elements are equal to each other for every element in the equation on both sides, then the equation is balanced.

Important concept : The big number before an element or compound represents how many molecules of that compound or element there are in a reaction. To find the number of atoms of each element you multiply the coefficient by the subscript ( small number ) which represents the number of atoms of that element in each molecule. Ex. 3H2O. There is a coefficient of 3 meaning that there are 3 molecules of H2O. There is a subscript after H meaning there are 2 atoms of hydrogen in each molecule. To find the total number of atoms we multiply the subscript of hydrogen by the coefficient of the whole molecule. 3 * 2 = 6 , so there are a total of 6 atoms of hydrogen in 3H2O

A) Cu + 2AgNO3 ==> CuNO3 + 2Ag

                    1   Cu  1

                    2   Ag  2

                     2   N  1

                     3  O   3

The amount of nitrogen atoms is different on both sides of the equation therefore this is not a balanced equation

B) CCl4 + O2 ==> CO2 + 2Cl2

                     1  C  1

                     4  Cl  4

                     2  O  2

The number of atoms of each element is the same on both sides of the equation therefore this is the balanced equation, however lets check the other answer choices just in case.

C)  2K + H2SO4 ==> K2SO4 + 2H2

                        2  K   2

                        1   H   4

                        1   S    1

                        4  O   4

The number of Hydrogen atoms are different on each side of the equation therefore this is not a balanced equation.

D) 2Al2O3 ==> 2Al + 3O2

              4  Al  2

              6  O  6
There are a different amount of aluminum atoms on both sides of the equation therefore this is not a balanced equation.

The smallest angle, measured from the reflecting planes, at which constructive interference of an X-ray beam is observed is approximately 27.2 degrees.

To determine the smallest angle of constructive interference, we can use Bragg's Law, which states that constructive interference occurs when the path difference between two waves is equal to an integer multiple of the wavelength. The formula is given as:

2d sin(θ) = nλ

Where:

d is the distance between the reflecting planes (0.541 nm)

θ is the angle between the incident X-ray beam and the planes (the desired angle)

n is the order of the interference (we are considering the first-order, so n = 1)

λ is the wavelength of the X-ray beam (0.0649 nm)

Rearranging the formula, we get:

sin(θ) = (nλ) / (2d)

θ = arcsin((nλ) / (2d))

Plugging in the values, we have:

θ = arcsin((1 * 0.0649 nm) / (2 * 0.541 nm))

θ ≈ 27.2 degrees

Therefore, the smallest angle at which constructive interference is observed is approximately 27.2 degrees.

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Answer:

mili

hecto

deci

deca

centi

kilo

Explanation:

Answer:

milli-

centi-

deci-

deca-

hecto-

kilo-

Answer

%Yield = 87.2%

Explanation

Given:

mass of NH3 reacted = 73 g

mass of H2O produced = 101 g

We know:

molar mass of NH3 = 17,031 g/mol

molar mass of water = 18.01528 g/mol

Required: % Yield

Solution:

The formula used to calculate the percentage yield is:

%Yield = (actual yield/theoretical yield) x 100

The actual yield of H2O produced = 101 g

Now lets calculate the theoretical yield first.

First find the number of moles of NH3, and use stoichiometry to find the theoretical mass of water.

n = m/M n is the moles, m is the mass and M is the molar mass.

n = 73/17,031 g/mol

n = 4.29 mol

Using the stoichiometry, there molar ratio between NH3 and H2O is 4:6

Therefore the moles of H2O = 4.29 x (6/4)

n of H2O = 6.43 mol

The theoretical mass can then be calculated:

m = n x M

m = 6.43 mol x 18.01528 g/mol

m = 115.83 g

%Yield = (101 g/115.83)*100

%Yield = 87.2%

Answer:

C.) 4.85 x 10⁻¹⁹ J

Explanation:

To find the energy, you need to use the following equation:

E = hc / w

In this formula,

-----> E = energy (J)

-----> h = Planck's Constant (6.626 x 10⁻³⁴ J*s)

-----> c = speed of light (3.00 x 10⁸ m/s)

-----> w = wavelength (m)

Once you have converted nanometers to meters, you can plug the given values into the equation and solve.

410 nm                1 m
-------------  x  ----------------------  =  4.10 x 10⁻⁷ m
                        1 x 10⁹ nm

E = hc / w

E = (6.626 x 10⁻³⁴ J*s)(3.00 x 10⁸ m/s) / (4.10 x 10⁻⁷ m)

E = 4.85 x 10⁻¹⁹ J

Answer:

Joule

Explanation:

This is the answer

Granite has a specific heat of 800 J/g °C. the mass of granite is needed to store 150200 J from 30  °C to 75  °C is 4.17 g.

Given that :

specific heat of granite ( c ) = 800 J/g  °C.

Q store = 150,200 J

temperature T1 = 30  °C.

temperature T2 = 75  °C.

now, Q = mc (T2-T1 )

        150200 J = m × 800 J/g  °C ( 75  °C - 30  °C )

         m  =   150200 J/ 800 J/g  × 45

         m  =   150200 g / 36000

         m  =  4.17 g

Thus, Granite has a specific heat of 800 J/g °C. the mass of granite is needed to store 150200 J from 30  °C to 75  °C is 4.17 g.

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There are three subshells that are attached to the electron at the 4p level.

The term orbital refers to the region in space where there is a high probability of finding an electron. We know that in the atom, there is an arrangement of the electrons into orbitals. Each of the orbitals have a specific energy. The energy that is available to the orbital is dependent on the value of the principal quantum number n as it species the distance of the orbital from the nucleus.

In the case of the electron that has the designation of quantum numbers n = 4, l = 1, this electron is found in the 4p level and there are three subshells that are attached to the electron at the 4p level.

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To solve this problem, we could use the Boyle's law since there's a sample of ideal gas and temperature is constant.

Boyle's law tells us that:

Replacing the values of the problem:

The new volume V equals 5.6L.

The molecule that has no net dipole moment is TeO₃ (tellurium trioxide).

Let's analyze each of the molecules:

N₂O (nitrous oxide):

The molecule has a linear geometry with a N≡N triple bond. The bond dipoles do not cancel each other out, resulting in a net dipole moment. Therefore, N₂O has a net dipole moment.

H₂Se (hydrogen selenide):

The molecule has a bent or V-shaped geometry. The Se-H bonds have dipole moments, and due to the asymmetrical geometry, these dipole moments do not cancel each other out. Hence, H₂Se has a net dipole moment.

TeO₃ (tellurium trioxide):

The molecule has a trigonal planar geometry. The Te-O bonds have dipole moments, but they are arranged symmetrically around the central tellurium atom. The bond dipole moments cancel each other out, resulting in no net dipole moment for TeO₃.

NF₃ (nitrogen trifluoride):

The molecule has a trigonal pyramidal geometry. The N-F bonds have dipole moments, but again, due to the symmetrical arrangement of the bonds around the central nitrogen atom, the dipole moments cancel each other out. Thus, NF₃ has no net dipole moment.

CH₃Cl (Chloro-methane):

The molecule has a tetrahedral geometry. The C-Cl bond has a dipole moment, and since the molecule is asymmetrical, the dipole moments do not cancel each other out. Therefore, CH₃Cl has a net dipole moment.

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The relative atomic mass of the metal, M is 65 g/mol.

The mole ratio of the metal and the sulfate is calculated from the mass of the metal and the sulfate present in the compound.

Mass of the compound = 1.61 g

Mass of the metal, M, in the compound = 0.65 g

Mass of sulfate = mass of compound - the mass of metal

Mass of sulfate = 1.61 - 0.65

Mass of sulfate = 0.96 g

The formula of the compound is MSO₄

1 mole of the metal combines with 1 mole of sulfate

Moles of sulfate in the compound = mass / molar mass

Molar mass of sulfate = 96 g/mol

Moles of sulfate = 0.96 / 96

Moles of sulfate = 0.01 moles

Hence, the moles of metal in the compound is 0.01 moles

The relative atomic mass of the metal = 0.65 / 0.01

The relative atomic mass of the metal  = 65 g/mol

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Complete question:

Calculate the relative atomic mass of a metal M given that 0.65g of the metal forms 1.61g of sulfate of formula MSO₄. (S = 32, O = 16).

Catalysts, such as the minerals deposited on hydrothermal vent walls, bring reactants together and increase the speed of the reactions without providing energy.

We can define catalysts as substances that increase the speed of a reaction. The catalysts themselves remain unchanged in a chemical reaction and work by lowering the temperature, pressure and energy levels.

Without a catalyst, a chemical reaction will take a long time to occur.

The rate of a reaction increases using a catalyst for the reaction. Some of the minerals that act as catalyst in hydrothermal vents are iron, nickel and sulfide minerals.

The oxides of most metals acts as catalysts. Inside the body of organisms, enzymes act as biological catalysts.

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Answer:

1.9 x 10^-20 Joules

Explanation:

I'll assume the frequency is 2.9 x 10^13 Hz  [5-1 was meant to be s^-1].

The energy of a photon is given by the releationship:

 E = hf, where E is energy, h is Planck's constant, and f is frequency, in 1/s or Hz.

Planck's constant = 6.62607E-34 J*s

E = hf

E = (6.626 x 10^-34 J*s)*(2.9 x 10^13 s^-1)

E = 1.9 x 10^-20 Joules