which two observers would be experiencing the same apparent solar time?

Answer:

im pretty sure its move at a constant rate to the right

Answer:

\(\boxed {\boxed {\sf 1290 \ g \ PI_3}}\)

Explanation:

We want to convert from moles to grams, so we must use the molar mass.

The molar mass is the mass of 1 mole of a substance. It is the same as the atomic masses on the Periodic Table, but the units are grams per mole (g/mol) instead of atomic mass units (amu).

We are given the compound PI₃ or phosphorus triiodide. Look up the molar masses of the individual elements.

Note that there is a subscript of 3 after the I in the formula. This means there are 3 moles of iodine in 1 mole of the compound PI₃. We should multiply iodine's molar mass by 3, then add phosphorus's molar mass.

Use the molar mass as a ratio.

\(\frac {411.687262 \ g \ PI_3}{ 1 \ mol \ PI_3}\)

We want to convert 3.14 moles to grams, so we multiply by that value.

\(3.14 \ mol \ PI_3 *\frac {411.687262 \ g \ PI_3}{ 1 \ mol \ PI_3}\)

The units of moles of PI₃ cancel.

\(3.14 *\frac {411.687262 \ g \ PI_3}{ 1 }\)

\(1292.698 \ g\ PI_3\)

The original measurement of moles has 3 significant figures, so our answer must have the same. For the number we calculated, that is the tens place.

The 2 in the ones place tells us to leave the 9.

\(1290 \ g \ PI_3\)

3.14 moles of phosphorous triiodide is approximately equal to 1290 grams of phosphorus triodide.

heterogeneous, because it does not have a uniform texture

hope That helps

Answer:

Heterogenous, I just took the quiz

Explanation:

Answer:

1. 0.465L × 1000 = 465 ml

2. 7.240 m

3. 123.537 kg

4. 1.62 gal

5. 0.0015 KL

Explanation:

please make my answer as brainelist

Answer:

Condensation

Explanation:

Gas particles move closer to each other and condense which makes them heavier, The density will increase then it becomes a liquid

The balanced chemical equation is:

0.5C7H16 + O2 → 0.5CO2 + H2O

For balancing the chemical equation C7H16 + O2 → CO2 + H2O, we can use linear algebraic techniques. We need to determine the coefficients that balance the number of atoms on both sides of the equation.

Let's denote the coefficients for C7H16, O2, CO2, and H2O as a, b, c, and d, respectively.

The balanced chemical equation can be written as:

aC7H16 + bO2 → cCO2 + dH2O

To balance the carbon (C) atoms, we have:

7a = c (Equation 1)

To balance the hydrogen (H) atoms, we have:

16a = 2d (Equation 2)

To balance the oxygen (O) atoms, we have:

2b = 2c + d (Equation 3)

We have three equations (Equations 1, 2, and 3) and four unknowns (a, b, c, d). To solve this system of equations, we can write it in matrix form and find the solution using linear algebraic techniques.

The augmented matrix for the system of equations is:

[ 7 0 -1 0 | 0 ]

[ 0 0 0 -2 | 0 ]

[ 0 -2 2 -1 | 0 ]

By performing row operations to row-reduce the augmented matrix, we can obtain the solution:

[ 1 0 -0.5 0 ]

[ 0 1 -1 -0.5 ]

[ 0 0 0 0 ]

The solution to the system of equations is:

a = 0.5

b = 1

c = 0.5

d = 1

Putting the values of a,b,c, and d we get the balanced chemical equation as:

0.5C7H16 + O2 → 0.5CO2 + H2O

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The freezing point if water is reduced when salt (NaCl) is added to it.

A freezing point is defined as the particular temperature where by a liquid such as water becomes a solid when other conditions are being kept constant.

A freezing point can also be defined as the temperature of a liquid at which it changes its state from liquid to solid at atmospheric pressure.

Some of the factors that affects freezing point of water is the presence of impurities such as salt and change in pressure of the medium.

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The words that fill in the blanks in order are;

1) Incomplete

2) Oppositely

3) Metal

4) High

5) Solids

6) Non metals

7) Share

8) Low

We know that a bond can be formed when there is a combination of two or more atoms in a compound. We know that the combination could lead to the formation of an ionic bond or the formation of a covalent bond.

If we form an ionic bond, then the it implies that there would be the transfer of electrons in the bond. As a result, we are going to end up with a pair of ions. One of the ions is positively charged and one of the ions is negatively charged.

For the covalent compounds, there is the sharing of the electrons of the bond and as such, it is the kind of bond that occurs between two compounds that are non metals.

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The answer can not be calculated because of lack of available information.

What is atomic mass?

The atomic mass of an element is the average mass of an atom of that element, based on the atomic masses of its isotopes and their relative abundances. The atomic mass of an element is typically expressed in atomic mass units (amu), which are defined as one-twelfth the mass of a carbon-12 atom. The atomic mass of an element is not the same as the mass of a single atom of that element. Instead, it is an average value that takes into account the relative abundances of the different isotopes of the element. The atomic mass of an element is important for understanding the properties of that element and for performing chemical calculations. The atomic mass of an element is used to determine the relative masses of atoms and molecules and is a key factor in determining the chemical behavior of an element.

According to the problem:

The relative atomic mass of Pivotium is the average atomic mass of the element, taking into account the relative abundances of its isotopes.

To calculate the relative atomic mass of Pivotium, the atomic mass of each isotope and the percentage of each isotope in the mixture has to be known.

According to the given information, the mixture contains 27% Pivotium-425 and 73% Pivotium-415.

Use the following formula to calculate the relative atomic mass of Pivotium:

Relative atomic mass of Pivotium = (percentage of Pivotium-425 * atomic mass of Pivotium-425) + (percentage of Pivotium-415 * atomic mass of Pivotium-415)

Since the atomic mass of Pivotium-425 and Pivotium-415 are unkown, this formula to calculate the relative atomic mass of Pivotium is of no use. However, this formula shows how the relative atomic mass of an element is calculated based on the atomic masses of its isotopes and their relative abundances.

It's important to note that the relative atomic mass of an element is a weighted average of the atomic masses of its isotopes, taking into account the relative abundances of each isotope in the element. The relative atomic mass is a measure of the average mass of the atoms in an element and is used to determine the atomic mass of an element in chemical calculations.

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The molar solubility of MgCO₃ in pure water if  Ksp (MgCO₃) = 6.82 × 10⁻⁶ is 2.61 × 10⁻³ M (Option D).

To determine the molar solubility of MgCO₃ in pure water we can use the Ksp value provided, which is 6.82 × 10⁻⁶. The dissociation reaction of MgCO₃ is:

MgCO₃ (s) ⇌ Mg²⁺ (aq) + CO₃²⁻ (aq)

Let the molar solubility of MgCO₃ be x. Then, the concentrations of Mg²⁺ and CO₃²⁻ ions in the solution are also x. According to the solubility product constant (Ksp) expression:

Ksp = [Mg²⁺] [CO₃²⁻] = x²

Now, we can solve for x:

6.82 × 10⁻⁶ = x²

x = √(6.82 × 10⁻⁶)

≈ 2.61 × 10⁻³ M

Therefore, the molar solubility of MgCO₃ in pure water is approximately 2.61 × 10⁻³ M.

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There are 6 attomoles of epinephrine in each vesicle.

The number of molecules per vesicle is 3.613 * 10¹⁵ molecules

The volume of the vesicle is 3.35 * 10⁻¹⁸ m³ or 3.35 * 10⁻¹⁵ L

The molar concentration of epinephrine in the vesicle is 2.99 M.

The number of attomoles of epinephrine in each vesicle is determined as follows:

Number of attomoles per vesicle = (150 fmol / 2.5 x 10⁴) / 10⁹

Number of attomoles per vesicle = 6 amol

(b) To find the number of molecules of epinephrine in each vesicle is determined as follows:

Molecular weight of epinephrine = 183.2 g/mol

Based on Avogadro's number:

1 mole of epinephrine = 6.022 * 10²³ molecules

1 amol of epinephrine = 6.022 * 10¹⁴ molecules

Number of molecules per vesicle = 6 * 6.022 * 10¹⁴

Number of molecules per vesicle = 3.613 * 10¹⁵ molecules

(c) The volume of a vesicle with radius r is:

r = 200 nm or 2 * 10⁻⁷ m, we get:

V = (4/3) * π * (2 * 10⁻⁷)³

V = 3.35 * 10⁻¹⁸ m³

Converting to liters:

1 L = 10⁻³ m³

The volume of the vesicle in liters will be:

V = 3.35 * 10⁻¹⁸ m³ * (1 / 10⁻³)

V = 3.35 * 10⁻¹⁵ L

(d) The molar concentration of epinephrine in the vesicle is determined using the formula below:

Molar concentration = 10 amol / 3.35 * 10⁻¹⁸ m³

Converting amol to mol:

Molar concentration = 10 * 10⁻¹⁸ mol / 3.35 * 10⁻¹⁸ m³

Molar concentration = 2.99 M

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At present, the greenhouse effect of carbon dioxide is not greater than that of water vapor. Thus, the given statement is false.

The amount of effect that water vapor has on the greenhouse effect is about 40-50 percent while with carbon dioxide, it accounts to 25 percent. The significant difference between them shows the different impacts on the greenhouse effect.

Both of them cause the same effects of heat, however, water vapor being a greenhouse gas is inevitable and natural.  It is much needed for life to sustain on earth, however, the numbers have increased causing an alarming rate of change that may not be good.

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Answer:

chemical potential energy - It mainly has chemical potential energy, this is really a type of electrical potential energy stored in the chemical bonds of the molecules

Explanation:

You can give the other person brainliest, I don't need it! :)

0.0305mol of carbon dioxide can be produced when 3.05 mole of calcium carbonate are heated.

Carbon dioxide is a chemically compound made up of molecules that each one have  one carbon atomclick covalently double bonded to two oxygen atoms. It is founded in the gas state at room temperature. In the air, carbon dioxide is to the  transparent to visible light of the  but absorbs infra-red by radiation, acting as the  greenhouse gas.

CaCO3 ---> CaO + CO2

Mass of CaCO3 mol = 40 + 12 + (16 x 3) = 100g/mol

Number of CaCO3 moles heated = 3.05/100 = 0.0305 mol

One CaCO3 mol produces 1 mol CO2

Therefore 0.0305mol  of CO2 produced.

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a. cobalt. Vitamin B12, also known as cobalamin, contains the element cobalt.

Cobalt is an essential component of the structure of vitamin B12, which plays a crucial role in various physiological processes in the human body. It is involved in the formation of red blood cells, DNA synthesis, and the maintenance of the nervous system. Cobalt is necessary for the proper functioning of enzymes involved in these processes. While other elements like chromium, copper, zinc, and iron are also essential for human health, they are not directly associated with the structure or function of vitamin B12.

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Answer:

The hydroxide ion concentration in an aqueous solution, [OH-], in mol L-1, can be calculated if the pOH of the solution is known.

pOH is defined as the negative logarithm (to base 10) of the hydroxide ion concentration in mol L-1 pOH = -log10[OH-]

Explanation:

Answer:

See explanation.

Explanation:

Hello there!

In this case, according to the described chemical reaction, we first write the corresponding equation to obtain:

\(Cu+2AgNO_3\rightarrow 2Ag+Cu(NO_3)_2\)

Thus, we proceed as follows:

Part 1 of 3: here, since the molar mass of silver and copper (II) nitrate are 107.87 and 187.55 g/mol respectively, and the mole ratio of the former to the latter is 2:1, we can set up the following stoichiometric expression:

\(m_{Cu(NO_3)_2}=1.29gAg*\frac{1molAg}{107.87gAg}*\frac{1molCu(NO_3)_2}{2molAg}*\frac{187.55gCu(NO_3)_2}{1molCu(NO_3)_2} \\\\m_{Cu(NO_3)_2}=1.12gCu(NO_3)_2\)

Part 2 of 3: here, the molar mass of copper is 63.55 g/mol and the mole ratio of silver to copper is 2:1, the mass of the former that was used to start the reaction was:

\(m_{Cu}=1.29gAg*\frac{1molAg}{107.87gAg}*\frac{1molCu}{2molAg}*\frac{63.55gCu)_2}{1molCu} \\\\m_{Cu}=0.380gCu\)

Part 3 of 3: here, the molar mass of silver nitrate is 169.87 g/mol and their mole ratio 2:2, thus, the mass of initial silver nitrate is:

\(m_{AgNO_3}=1.29gAg*\frac{1molAg}{107.87gAg}*\frac{2molAgNO_3}{2molAg}*\frac{169.87gAgNO_3}{1molAgNO_3} \\\\m_{AgNO_3}=2.03gAgNO_3\)

Best regards!

. How many joules of heat are absorbed to raise

the temperature of 37 grams of water from 25°C

to 75°C?

Answer: time

Explanation: time

Answer:

The formula for density is D = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre..

The density equation is density equals mass per unit volume or D = M / V. The key to solving for density is to report the proper mass and volume units. If you are asked to give density in different units from the mass and volume, you will need to convert them..

The five steps for determining density can be expressed in simple form as follows: measure the mass of the container, measure the volume of the liquid, measure the combined mass of the liquid and the container, determine the mass of the liquid alone and divide the mass by the volume..

Explanation:

I hope it helps..

Just correct me if I'm wrong, okay?(;ŏ﹏ŏ)

But... Your Welcome!!

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The material being extruded by Mount Mayon is "Lava".

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Answer:

shortest wavelength - gamma rays

highest wavelength - radio waves

Explanation:

Look at the electromagnetic spectrum

Answer:

I don't use your question?

Answer:

Explanation:

It's called a Redbox reaction because when a change in oxidation number occurs in a reaction, with both an increase in number and a decrease in number, then the reaction is classified as redox. If this doesn't occur, then the reaction is non- redox.

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The federal government tried to appease conservationists and businesses in its land-use policies.

A form of government in which power is distributed between a central authority and a number of constituent territorial units.

During the early times of the Gilded Age, the government agency workers felt pressure and uncertainty between the interests of businesses and conservationists due to the reason that the federal government were dependent on the contributions from businesses. On the contrary, conservation efforts are being favoured more by the voters.

The federal government influences interest rates and then it takes six months for the economy to pick that up and that provides steady growth and good GDP for the USA.

The federal government does not fix prices for products. The fed tries to fix interest rates.

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Answer:

B.

Explanation: hope this helps

Benzene

Answer:

V₂ = 2509.62 cm³

Explanation:

Given data:

Initial volume = 1500 cm³

Initial temperature = -65°C (-65 + 273 = 208 K)

Final temperature = 75°C ( 75 +273 = 348 K)

Final volume = ?

Solution:

The given problem will be solve through the Charles Law.

According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.

Mathematical expression:

V₁/T₁ = V₂/T₂

V₁ = Initial volume

T₁ = Initial temperature

V₂ = Final volume  

T₂ = Final temperature

Now we will put the values in formula.

V₁/T₁ = V₂/T₂

V₂ = V₁T₂/T₁  

V₂ = 1500 cm³ × 348 K / 208 k

V₂ = 522000 cm³.K / 208 k

V₂ = 2509.62 cm³

Answer:

Nitric acid reacts with sodium carbonateto form sodium nitrate, carbon dioxide and water. 2HNO3+Na2CO3→2NaNO3+CO2+H2O.

Answer:

C (s) + O2 (g) > CO2 (g)

That's what I got

Answer:

952.2g SO3

Explanation:

Molar mass of C4H8S2 is 120.2363 g/mol

Mol in 750.0g = 750.0/120.2363 = 6.238 mol

1mol C4H8S2 produces 2 mol SO3

6.238 mol will produce 2×6.238 = 12.476 mol SO3

Molar mass SO3 = 32+3×16 = 80.0g/mol

Theoretical yield = 12.476×80.0 = 998.08g

The actual yield is 95.4%

Actual mass-produced = 95.4/100×998.08 = 952.2g SO3 produced

Hope it will help you.

Answer:

Kp = 4.5 x 10⁻⁹

Explanation:

from equilibrium of gas phase rxns, Kp = Kc(R·T)^-Δn

2NH₃(g) ⇄ 3H₂(g) + N₂(g)

 2Vm          3Vm      1Vm

Δn = ∑Vm(products) - ∑Vm(reactants) = (3Vm + 1Vm) - 2Vm = 2Vm = +2

Kc = Kb = [H₂]³[N₂]/[NH₃]² = 1.8 x 10⁻⁵M²

R = 0.08206 L·atm/mol·K

T = 500°C = (500 + 273)K = 773K

Kp = Kb(R·T)^-Δn = 1.8 x 10⁻⁵M²[(0.08206L·atm/mol·K)(773K)]⁻⁽⁺²⁾

= (1.8 x 10⁻⁵mol²/L²)(63.43atm/mol)⁻²

= 4.5 x 10⁻⁹atm

Hope this helps. :-)

Answer:

1183680 seconds

Explanation: