January 2 is a third quarter moon. What is the approximate date of the next full moon?

Answer: They're called Periods

periods of the periodic table

Answer:

ok so im gonna go and do some for your latest questions then if thats alright with you

Explanation:

i need points so im trying to help as many people as i can before the end of the day.

but you have to make the questions forst so i can help you understand them

Answer:

30

Explanation:

Measure the water rised in the beaker which is 180 and subtract 150 and you get 30

Answer: Melting or boiling

Explanation:

Melting or boiling point is another property that scientists can use to identify a substance. Melting point is the temperature at which a substance changes from solid → liquid. Boiling point is the temperature at which a substance changes from liquid → gas.

The slope of the ln(k) versus 1/t plot is -42,040 J/mol.

The slope of the ln(k) versus 1/t plot provides valuable information about the activation energy of a reaction. In this case, the given activation energy is 42.04 kJ/mol.

To determine the slope in joules, we need to convert the activation energy to joules by multiplying it by 1000 (1 kJ = 1000 J). Therefore, the activation energy is 42,040 J/mol.

Since the slope of the ln(k) versus 1/t plot represents the negative activation energy divided by the gas constant (R), the slope can be calculated as -42,040 J/mol.

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answer

half-life means the time it takes for half the amount of a substance to decay.

for silver-104 this is 30 min. so after 30 minutes the amount of silver will have halved.

if we have 40 grams. after 30 minutes we will have 20 grams and after another 30 minutes we will have 10 grams and so forth.

so it would take roughly 30 minutes to have 20 grams left

ANSWER

option d

The error is in the formula is bracket so the correct is Mg(OH)₂

The incorrect or error in the formula is bracket that would be that the compound contain only 1Mg atom and 1 oxygen atom and 2 hydrogen atom but is wrong when you write it in an electron dot diagram you will see that it is wrong there be unshared paired of electron and the correct formula is Mg(OH)₂

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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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Fog remains suspended in the air because they are supported by slight movement in the air

If the air near the ground cools down enough and is humid and light wind (stable), water vapour in the air may condense into minute water droplets. Near ground level, these raindrops make it harder to see. Fog is the term for the phenomenon.

Fog is defined as "air that is near to the surface and contains suspended water droplets, typically generated by diabatic cooling" in Understanding Weather and Climate.

When the air close to the ground cools down sufficiently, the water vapor condenses into liquid water or ice, creating fog. Fog comes in a wide variety of forms. When the air close to the ground is chilly enough, ice fog develops.

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Answer:

\(\boxed {\tt 376.83 \ grams}\)

Explanation:

The density formula is

\(d=\frac{m}{v}\)

Rearrange the formula for mass, m, by multiplying both sides of the equation by v.

\(d*v=\frac{m}{v}*v\)

\(d*v=m\)

The mass can be found by multiplying density and volume.

The density of the sugar is 1.59 grams per milliliter. The volume is 237 milliliters.

\(d= 1.59 \ g/mL \\v= 237 \ mL\)

Substitute the values into the formula.

\(m= 1.59 \ g/mL * 237 \ mL\)

Multiply. Note that the milliliters, or mL will cancel each other out.

\(m=1.59 \ g * 237\)

\(m=376.83 \ g\)

The mass is 376.83 grams.

Answer:

(a) By the ideal gas law, the temperature of the gas is approximately 423.51129 K

(b) By the Van der Waals equation, the temperature of the gas is approximately 442.00558 K

Explanation:

The given parameters are;

The mass of the methane gas, m = 60 g

The volume of the container in which the gas is placed, V = 1.00-L

The pressure of the gas in the container, P = 130 atm

The molar mass of methane, CH₄ = 16.04 g/mol

The Van der Waals Constant for Methane (CH₄) a = 2.253 atm L²·mole⁻² and b = 0.04278 L·mol⁻¹

The universal gas constant, R = 0.08206 L·atm·mol⁻¹·K⁻¹

The number of moles of methane present, n = 60.0 g/(16.04 g/mol) ≈ 3.7406 48 moles

(a) The ideal gas law is P·V = n·R·T

Where;

P = The pressure of the gas

V = The volume of the gas

R = The universal gas constant

T = The temperature of the gas

n = The number of moles of the gas

Therefore, T = P·V/n·R

By substituting the known values of the variables, we get;

T = 130×1/(3.740648 × 0.08206) ≈ 423.51129 K

The temperature of the gas, T ≈ 423.51129 K

(b) The Van der Waals equation of state;

\(n \cdot R \cdot T = \left (P + a \cdot \dfrac{n^2}{V^2} \right) \cdot (V - n\cdot b)\)

Therefore, we have;

\(T = \dfrac{ \left (P + a \cdot \dfrac{n^2}{V^2} \right) \cdot (V - n\cdot b)}{n \cdot R}\)

Therefore, we have;

\(T = \dfrac{ \left (130 + 2.253 \times \dfrac{3.740648^2}{1^2} \right) \times (1 - 3.740648\cdot 0.04278)}{3.740648 \times 0.08206} = 442.00558 \ K\)

The temperature of the gas, T ≈ 442.00558 K.

If the absorbance of an experiment is greater than 1, it suggests that there is excessive light in the sample, which can lead to incorrect results.

To correct for this, the experimental procedure can be modified as follows:

Reduce the exposure time: Increasing the exposure time in a spectrophotometer will increase the absorbance reading, especially if there is excessive light in the sample. By reducing the exposure time, the absorbance reading will decrease, providing a more accurate measurement of the sample's optical properties.

Use a black background: The background of a spectrophotometer is the light that is present in the instrument itself, and it can contribute to the overall absorbance reading. To correct for this, a black background can be used, which will absorb most of the light and minimize the contribution to the absorbance reading.

Use a cuvette with a smaller path length: The path length of a cuvette is the distance that light travels through the sample to reach the detector. If the path length is too long, it can lead to errors in the absorbance reading. By using a cuvette with a smaller path length, the effect of excessive light can be minimized, resulting in a more accurate measurement.

Use a narrower bandwidth: In some cases, the absorbance reading may be high due to the presence of narrow bands of light in the spectrum. By using a narrower bandwidth, the instrument can measure only the bands of light that are relevant to the experiment, reducing the contribution of excessive light to the absorbance reading.

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Answer:

The basis of the separation by steam distillation is that while the water and organic condensed phases are immiscible, the vapors of both are miscible. Once condensed, the two separate again allowing for an easy separation. As noted above, both liquids and solids can be distilled by steam.

Explanation:

I hope this helps!

Answer:

The anwser is A

Explanation:

Answer:

As light travels from source to detection, it can behave as either a particle or a wave—or, paradoxically, both states or neither state. ... Eventually, researchers performing the so-called double-slit experiment demonstrated that Newton and Huygens were both right—photons of light could behave as both particles and waves.Oct 25, 2017

Explanation:

The pressure of the gas inside the cylinder is 52.90 atm

Given is the number of moles of gas, the temperature and the volume of the gas and we need to find the pressure of the gas inside the cylinder, for this we can use the ideal gas law equation:

PV = nRT

Where:

P = Pressure of the gas (in units of pressure, such as atm)

V = Volume of the gas (in liters)

n = Number of moles of the gas

R = Ideal gas constant (0.0821 L·atm/(mol·K))

T = Temperature of the gas (in Kelvin)

First, let's convert the temperature from Celsius to Kelvin:

T = 25.0 °C + 273.15 = 298.15 K

Now we can substitute the values into the ideal gas law equation:

P × 12.5 L = 27.0 moles × 0.0821 L·atm/(mol·K) × 298.15 K

Simplifying the equation:

P × 12.5 L = 661.2587 L·atm

Dividing both sides by 12.5 L:

P = 661.2587 L·atm / 12.5 L

P ≈ 52.90 atm

Therefore, the pressure of the gas inside the cylinder is approximately 52.90 atm.

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We can use the ideal gas law equation to determine the pressure of a gas within a cylinder:

PV = nRT

Where:

P is the pressure of the gas (in units of pressure, such as atm)

V is the volume of the gas (in units of volume, such as liters)

n is the number of moles of the gas

R is the ideal gas constant (0.0821 L·atm/(mol·K))

T is the temperature of the gas (in units of temperature, such as Kelvin)

we need to convert the temperature from Celsius to Kelvin:

T(K) = T(°C) + 273.15

T(K) = 25.0 °C + 273.15

T(K) = 298.15 K

Now we can plug the data into the ideal gas law equation as follows:

P * 12.5 L = 27.0 moles * 0.0821 L·atm/(mol·K) * 298.15 K

Simplifying the equation:

P = (27.0 moles * 0.0821 L·atm/(mol·K) * 298.15 K) / 12.5 L

Calculating the pressure:

P ≈ 5.046 atm

As a result, the gas inside the cylinder is under a pressure of about 5.046 atm.

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Answer:

the answer is tetahedal and the next one is trigonal pyramidal

Explanation:

Answer:

tetrahedral

Explanation:

edge

Answer:

At equilibrium, the rate of the forward, and the reverse reactions are equal.

Explanation:

In an equilibrium chemical reaction, the rate of forward reaction, is equal to the rate of reverse reaction. Note that the reactions does not cease at equilibrium, but rather, the reactants are converted to product, at the same rate at which the product is also being converted into the reactants in the reaction. When chemical equilibrium is reached, a careful calculation of the value of equilibrium constant is approximately equal to 1.

NB: If the value of equilibrium constant is far far greater than 1, then the reaction will favors more of the forward reaction, and if far far less than 1, the reaction will favor more of the reverse reaction.

To investigate the effects of anions on pH, option d- Liam should choose salts that have acidic or basic anions.

This is because the anions in a salt can react with water to produce either an acidic or basic solution. The choice of cation is not as important, as neutral cations will not affect the pH of the solution. Therefore, option (d) is the most appropriate choice for Liam.

To elaborate further, when a salt is dissolved in water, it dissociates into its respective cation and anion. The anion, in particular, can interact with water to form either an acidic or basic solution. For example, chloride ions (Cl-) do not have any acidic or basic properties, and therefore, will not affect the pH of a solution.

However, nitrate ions (NO) are basic anions and can hydrolyze to form hydroxide ions (OH-) and increase the pH of the solution.

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Answer:C

Explanation:

Answer:

It's B I promise you

Answer: There are 0.00054 moles of silane gas (SiH4) are present in 8.68 mL measured at 18 0C and 1.50 atm.

Explanation:

Given: Volume = 8.68 mL (1 mL = 0.001 L) = \(8.68 \times 10^{-3} L\),    

Temperature = \(18^{o}C = (18 + 273) K = 291 K\),

Pressure = 1.50 atm

The ideal gas formula is as follows.

PV = nRT

where,

P = pressure

V = volume

n = no. of moles

R = gas constant = 0.0821 L atm/mol K

T = temperature

Substitute the values into above formula as follows.

\(PV = nRT\\1.50 atm \times 8.68 \times 10^{-3} L = n \times 0.0821 L atm/mol K \times 291 K\\n = \frac{1.50 atm \times 8.68 \times 10^{-3} L}{0.0821 L atm/mol K \times 291 K}\\= \frac{0.01302}{23.8911}\\= 0.00054 mol\)

Thus, we can conclude that there are 0.00054 moles of silane gas (SiH4) are present in 8.68 mL measured at 18 0C and 1.50 atm.

Answer:

0-1

Explanation:

An electron is a negatively charged subatomic particle, So -1 is the correct option.

Answer:

1.03 × 10¹

Explanation:

The decimal point is after the first non-zero digit number. The decimal or the number is multiplied by a 10 with an exponent.

Answer:

An element is defined by the number of protons its nucleus contains, which is also called atomic number.

Which element requires the least amount of energy to remove the most loosely held electron?

aanswer: bromine

when heat is transferred out of a cup of water on a cold winter's day, the temperature of the water decreases, causing the water molecules to slow down and eventually freeze into ice.

When a cup of water is left outside on a cold winter's day, heat is transferred from the water to the surrounding air. This causes the temperature of the water to drop. As the temperature of the water decreases, the motion of the water molecules slows down and eventually, they become organized into a solid structure known as ice. This process of changing from a liquid to a solid is known as freezing.

The water molecules in a liquid state are constantly moving and colliding with each other. However, as the temperature drops, the motion of the water molecules slows down and they become more organized. The slower movement of the water molecules allows them to form bonds with each other, forming a crystalline lattice structure that we know as ice.

As a result of this process, the temperature of the water decreases, and when it reaches 0°C (32°F), it will freeze. This change in temperature is a result of the energy being transferred from the water to the surrounding air, as heat is conducted from the hot water to the cold air.

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Answer:

3.01×10²⁴ molecules of H₂

Explanation:

Reaction that can produce hydrogen gas from Pb can be this:

Pb + H₂S →  PbS + H₂

1 mol of Pb can react to 1 mol of H₂S to produce 1 mol of PbS and 1 mol of H₂

Ratio is always 1:1.

In conclussion 5 moles of lead will produce 5 moles of H₂.

Let's apply the NA to count molecules

1 mol contains 6.02×10²³

Then, 5 moles must contain (5 . 6.02×10²³) = 3.01×10²⁴ molecules

Answer:

Endangered species .............................

Answer: nose

Explanation:sorry

Answer:

1.46 mol of H₂

Explanation:

This easy question can be solved by a rule of three.

At STP conditions, we know that 1 mol of any gas is contained in 22.4L.

So let's make the operation:

22.4L is the volume for 1 mol of any gas, at STP

32.6 L may be the volume for (32.6 . 1) /22.4 = 1.46 moles.

We can also apply, the Ideal Gases Law.

At STP conditions, Temperature is 273.15 K and pressure is 1 atm

P . V = n . R . T

n = (P . V) / R. T → (1 atm . 32.6L) / (0.082 . 273.15K)

n = 1.455 mol

Answer:

The process of separating a metal from its ore is known as smelting.