the horse is probably hungry observation or inference science

Answer:

nitrogeno

Explanation:

creo xdddd

Answer:

bromine

Explanation:

(Ar)3d10,4s2,4p5

Answer:

= 3.01 x 10²³ atoms of gold (Au)

Explanation:

1 mole of any substance => 1 Avogadro's Number of particles = 6.02 x 10²³ particles.

∴ for 5 moles of gold atoms => 5 moles x 6.02 x 10²³ atoms/mole

= 3.01 x 10²³ atoms of gold (Au)

Answer:

E = 15×10⁻²⁹ J

Explanation:

Given data:

Frequency of photon = 2.2× 10⁷ Hz

Energy of photon = ?

Solution:

Formula:

E = h.f

h = 6.63×10⁻³⁴ Js

by putting values,

E = 6.63×10⁻³⁴ Js × 2.2× 10⁷ s⁻¹

E = 14.586 ×10⁻²⁹ J

E = 15×10⁻²⁹ J

The energy of photon is 15×10⁻²⁹ J.

We need to add 10.90 g of NaOH to the 250 ml sample of 1.09 molarity acetic acid to make the best buffer.

To make the best buffer from a 250 ml sample of 1.09 molarity acetic acid, we need to find out how much NaOH must be added. The Henderson-Hasselbalch equation, which relates the pH of a buffer to its pKa and the ratio of its weak acid to weak base forms.pH = pKa + log([A-]/[HA])In this case, we are dealing with an acetic acid buffer, which has a pKa of 4.76.

We are given a 250 ml sample of 1.09 molarity acetic acid. The molar mass of acetic acid is 60.05 g/mol. Therefore, the number of moles of acetic acid in the sample is:n(acetic acid) = M(acetic acid) x V(acetic acid)n(acetic acid) = 1.09 mol/L x 0.250 Ln(acetic acid) = 0.2725 molNext, we need to find out the amount of NaOH we need to add to make the buffer.

This is a bit tricky because we are given the volume of the acetic acid solution, but not the volume of the final buffer. We also don't know the concentration of the NaOH solution. However, we can use the fact that the buffer is prepared by mixing a weak acid with its conjugate base. Therefore, we can assume that the final buffer will have approximately equal concentrations of acetic acid and acetate ions, which means we need to add an equal amount of NaOH to convert half of the acetic acid to acetate ions.

The balanced chemical equation for the neutralization reaction is:CH3COOH + NaOH → CH3COONa + H2OThe stoichiometry of the reaction is 1:1, which means we need to add an equal number of moles of NaOH to neutralize the acetic acid.n(NaOH) = n(acetic acid) = 0.2725 molNow we need to find out how much NaOH that is in grams.

We can use the molar mass of NaOH to convert from moles to grams.m(NaOH) = n(NaOH) x M(NaOH)m(NaOH) = 0.2725 mol x 40.00 g/molm(NaOH) = 10.90 gTherefore, we need to add 10.90 g of NaOH to the 250 ml sample of 1.09 molarity acetic acid to make the best buffer.

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Answer:

Galileo: "Father of Modern Science."

Aristotle: Geocentric theory." (The planests revolves around the earth.)

Torricelli: Invented the barometer. (An instrument which measures pressure.)

Copernicus: Heliocentric theory. (Aka, the planets revolves around the sun.)

Vesalius: Examined the inner workings of the human body

Newton: Developed law of universal gravitation.

Nightingale: Founded nursing profession.

Celsius: Developed metric temperature scale

I hope this helps! Thanks:)

Answer:

B. Light

Explanation:

Light is converted into energy during photosynthesis

The total pressure in the container after the three gases are mixed is 6 atm and the partial pressure of He is 1 atm.

According to Dalton's Law of Partial Pressure , the pressure exerted by a mixture of gas is equal to the sum of the partial pressure of the gases in the mixture.

P(total) = p₁ +p₂+p₃+.....

As the volume of the containers are same and the

n = 1*5/RT for Helium

n = 2*5 /RT for Neon

n= 3*5/RT for Argon

Mole fraction = moles of the element/Total moles

Moles fraction of Helium is

\(\rm \dfrac{1*5}{1*5+2*5+3*5}\)

= 1/6

Total Pressure in the container = 1 + 2 +3 = 6 atm

The partial pressure of Helium will be

=Mole fraction * Total pressure

=(1/6)*6 atm

= 1 atm , as the volume is same the temperature is same , the pressure will also be same.

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Answer:

3.2

Explanation:

dont trust me

Answer:17.47m

Explanation:

Explanation:

Molarity is defined as moles of solute per liters of solution.

c

=

n

V

Glacial acetic acid is actually anhydrous acetic acid, which implies that the acetic acid is not actually dissolved in a solvent and therefore is not ctually a solute.

However, you can still calculate its molarity based on the number of moles of you get per liter of glacial acetic acid.

To do that, start with a sample o

1.000 L

of glacial acetic acid. You know that at

25

∘

C

, glacial acetic acid has a density of

1.049 g/mL

, which tells you that every mililiter of glacial acetic acid has a mass of

1.049 g

.

This means that the mass of the sample will be

1.000

L

⋅

1000

mL

1.000

L

⋅

1.049 g

1

mL

=

1049 g

To find how many moles you get in the sample, use the given molar mass, which tells you how many grams of acetic acid you get per mole

1049

g

⋅

1 mole CH

3

COOH

60.05

g

=

17.469 moles CH

3

COOH

Now that you know the volume of the sample and how many moles it contains, you can say that

c

=

17.469 moles

1.000 L

=

17.47 M

I'll keep the number of sig figs given for the density of glacial acetic acid.

Answer:

(i) In a bond amortization schedule, the book value represents the remaining amount of the bond principal that hasn't been paid off at a given point in time. When a bond is first issued, its book value equals its face value. As payments are made over the life of the bond, a portion of these payments reduces the book value. By the end of the bond's life, its book value will be zero, as the entire principal will have been paid off.

(ii) The formula for the book value B at time k, where k is the number of periods elapsed, is B = C + Cg - jan-kj.

Here:

- C is the redemption amount,

- g is the modified coupon rate per period,

- j is the yield rate per period, and

- a_n-kj is the present value of an annuity immediate with n - k periods at the yield rate j.

This formula states that the book value at any time k is the redemption amount plus the present value of the future coupon payments (Cg), minus the present value of the annuity that represents the repayments of the bond (jan-kj).

The amortized amount at time k is the change in the book value from time k-1 to time k, plus the coupon payment at time k. It represents the portion of the bond's principal (and interest) that has been repaid up to time k.

(iii) If K is defined as the present value of the redemption value C, according to the Makeham formula, (C-K) would represent the difference between the redemption value of the bond and its present value. This difference is the amount of interest that will accumulate over the life of the bond. In other words, (C-K) can be interpreted as the total interest that the bondholder will earn from holding the bond until redemption, assuming that all coupon payments are reinvested at the yield rate j.

Explanation:

The ionization constant from the reaction as shown in the calculation is 5.8.

The term ionization constant refers to the extent to which the acid is ionized in solution. It is calculated from;

Ka = [H3O^+] [Cl]/[HCl]

Thus when we substitute the values;

Ka = 13.3 * 7.4/ 16.9

Ka = 5.8

The ionization constant from the reaction as shown in the calculation is 5.8.

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If a bone is determined to have an activity of 3.80 cpm per gram of carbon, then the bone is 11,500 years old.

Carbon-14 has a half-life of 5730 years. The initial activity of a living organism is 15.2 counts per minute (cpm) per gram of carbon. In the case of the bone, the activity is 3.80 cpm per gram of carbon. To determine the age of the bone, we can use the formula:

N = N0 * (1/2)^(t / T)

where N is the current activity, N0 is the initial activity, t is the time in years, and T is the half-life of Carbon-14.

Rearrange the formula to solve for t:

t = T * log2(N0 / N)

Plug in the values:

t = 5730 * log2(15.2 / 3.8)

t ≈ 11,500 years

So, the bone is approximately 11,500 years old.

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Hope You got this.......

The refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.

To calculate the kilowatt-hours (kWh) of electric energy used by the refrigerator in 30 days, we need to multiply the power rating by the total running time.

Given:

Power rating of the refrigerator = 500 W

Running time per day = 12 hours

Number of days = 30

First, we need to convert the power rating from watts to kilowatts:

Power rating = 500 W / 1000 = 0.5 kW

Next, we calculate the total energy used in kilowatt-hours (kWh) over the 30-day period:

Energy used = Power rating × Running time × Number of days

Energy used = 0.5 kW × 12 hours/day × 30 days

Energy used = 180 kWh

Therefore, the refrigerator would use 180 kilowatt-hours (kWh) of electric energy over the course of 30 days, assuming it runs for 12 hours each day.

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Well, the answer is the 4rth one "

50°C"

A chemical formula represents the elementary composition of any pure substance. The best answer to fill the blank is formula.

A chemical formula uses chemical symbols to denote the types of atoms and numerical subscripts to indicate the number of each atom in the molecule. In the example given, CO2 represents carbon dioxide, which is a compound composed of one carbon atom (C) and two oxygen atoms (O). The subscript "2" indicates that there are two oxygen atoms for each carbon atom.

By knowing the chemical formula of a substance, we can determine the elements it contains and the relative proportions of those elements. Chemical formulas provide essential information about the composition of a substance at the elemental level, allowing us to understand its properties and behavior.

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Answer:

They form crystals,They're good insulators

Explanation:

Answer:

Glucose

Explanation:

Both simple and complex carbohydrates break down into glucose (aka blood sugar). A simple carb is one that's comprised of one or two sugar molecules, while a complex carb contains three or more sugar molecules.

HOPE IT HELPS! BE SAFE :)

Answer:

Glucose

Explanation:

Both simple and complex carbohydrates break down into glucose.

Answer: It loses kinetic energy.

To balance the torque bar, you will have to place a 200 g mass 30 cm from the pivot.

To balance the torque bar, the torque produced by the 300 g mass placed 20 cm from the pivot must be equal to the torque produced by the unknown mass placed 30 cm from the pivot.
Torque is calculated by multiplying the mass by the distance from the pivot. In this case, the torque produced by the 300 g mass is (300 g) * (20 cm) = 6000 g·cm.

To balance the torque, we need to find the mass that, when placed 30 cm from the pivot, will also produce a torque of 6000 g·cm.
Using the formula for torque, we can rearrange it to solve for the unknown mass:
(unknown mass) * (30 cm) = 6000 g·cm
Solving for the unknown mass, we divide both sides of the equation by 30 cm:
unknown mass = 6000 g·cm / 30 cm
Simplifying the equation, we find:
unknown mass = 200 g

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Answer:

The answer is in my attachment

Explanation:

hope this helped!

Answer:

The Heisenberg uncertainty principle states that the exact position and momentum of an electron cannot be simultaneously determined. Warner Heisenberg contributed to atomic theory through formulating quantum mechanics in terms of matrices and in discovering the uncertainty principle, which states that a particle's position and momentum cannot both be known exactly.

Explanation:

i hoped this help

Answer:

volcanos erupting under water

Explanation:

when lava and water connects, it hardens like a stone called "magma". so when lava started shooting up it caused lots of magma to build up which made a surface

Each 1.0 L balloon requires 1/18.8 = 0.053 moles of helium gas. You can fill approximately 13 1.0 L balloons with the helium gas in the cylinder.

Now, we can use the ideal gas law again to find the final volume of each balloon when the pressure is reduced to 1.0 atm:

PV = nRT

V2 = nRT/P2

V2 = (0.716 moles x 0.082 L atm/mol K x 298 K)/1.0 atm

V2 = 18.8 L/mol

The total number of 1.0 L balloons that can be filled with the 6.0 L cylinder of helium gas is:

n_total = n_initial/n_balloon

n_total = 0.716 moles/0.053 moles per balloon

n_total = 13.5 balloons

The ideal gas law is a fundamental equation in thermodynamics that relates the pressure, volume, temperature, and amount of gas in a closed system. It is expressed mathematically as PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is the gas constant, and T is the temperature in Kelvin.

This law is based on the assumption that gases are composed of small particles that move randomly and collide with each other and the walls of the container they are in. The ideal gas law is a useful tool for predicting the behavior of gases under different conditions, such as changes in temperature and pressure. Real gases deviate from ideal behavior at high pressures and low temperatures, and more complex equations must be used to describe their behavior accurately.

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It is to be noted that there are no p orbitals accessible for multiple bonding in an sp3 hybrid. The two unhybridized p orbitals are accessible for multiple bonding in sp hybridization.

Bonds are formed using unhybridized p atomic orbitals. Two unhybridized p atomic orbitals from distinct atoms overlap side by side, resulting in a shared electron pair filling the area above and below the connecting line between the atoms (the internuclear axis).

An atom will contain the same amount of hybridized orbitals as electron density areas. There can be a total of four hybridized sp3 orbitals, thus take the number of regions of electron density and divide that by four to get the number of unhybridized p orbitals.

An atomic orbital is a function in atomic theory and quantum mechanics that describes the position and wave-like behavior of an electron in an atom. This formula may be used to determine the likelihood of locating any atom's electron in any given location surrounding the nucleus.

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Answer:

Calcium

Explanation:

The number of protons is the atomic number of the element. Number 20 on the periodic table is Calcium.