Imagine mixing 1 tablespoon of Epsom salt with 2 cups of ammonia. How much precipitate would be produced? Describe the amount of precipitate by comparing it with the amount in bottle 1, 2, or 3. Explain your prediction.

At 19.8 L at STP, 38.9 g of carbon dioxide (CO2) are present.

One carbon atom is covalently doubly linked to two oxygen atoms in every carbon dioxide molecule, giving it the chemical formula CO2. The main source of accessible carbon in the carbon cycle, atmospheric CO2 is present in the gaseous state at room temperature and is the main carbon source for life on Earth.

1 mole of any gas will take up 22.4 L at STP. We can determine how many moles of CO2 there are given the 19.8 L of CO2 that we have.

\(19.8 L CO2 * (\frac{1 mole CO_2}{22.4 L}) = 0.88 moles of CO_2\)

Since the molecular weight of CO2 is 44.01 g/mol, we can calculate the number of grams of CO2.

0.88 moles CO2 x (44.01 g/mol) = 38.9 g CO2

Therefore, 19 8.6 L at STP contain 38.9 g of carbon dioxide (CO2).

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To determine the number of significant figures in a measurement, count the number of digits from the first nonzero digit to the end of the measurement.

To determine the number of significant figures in a measurement, count the number of digits from the first nonzero digit to the end of the measurement. In the problem given, we have:

The number 204 m has 3 significant figures since it has three nonzero digits.

The number 6 m has 1 significant figure since it only has one nonzero digit.

The final answer will have the same number of significant figures as the measurement with the fewest significant figures, so it will have 1 significant figure.

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Answer:

To convert joules to calories, you can use the conversion factor:

1 calorie = 4.184 joules

To find out how many calories are in 4,180 joules, divide the given value by the conversion factor:

4,180 joules / 4.184 joules per calorie = 0.9 calories (approximately)

Therefore, there are approximately 0.9 calories in 4,180 joules.

Answer:

Dont completly trust me here but i think its a but id try and wait for someone else just be careful

Explanation:

Answer:

calcium

Explanation:

Yes Compounds are generally made of two or more atom or ion or species!

TRUE

The statement that "compounds must contain at least two element" is true.

A chemical compound is a substance composed of many identical molecules containing atoms from more than one chemical element and held together by chemical bonds.

As a result, a molecule composed of only one element's atoms is not a compound.

A chemical formula uses standard chemical symbols with numerical subscripts to specify the number of atoms of each element in a compound molecule.

The Chemical Abstracts Service assigns a unique CAS number identifier to many chemical compounds.

Organic compounds are crucial even though carbon is found in all living organisms.

They are the fundamental components of many of the earth's cycles. The carbon cycle, for example, includes the exchange of carbon between plants and animals during photosynthesis and cellular respiration.

Thus, the given statement is true.

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The de Broglie wavelength of an electron traveling at 1.59×105m/s is  0.4547 x 10⁻⁹ m.

The elementary electric charge of the electron is a negative one, making it a subatomic particle. Due to their lack of known components or substructure, electrons, which are part of the first generation of the lepton particle family, are typically regarded to be elementary particles.

The length scale at which a particle's wave-like characteristics are significant is indicated by its de Broglie wavelength. The symbol or dB is typically used to indicate the De Broglie wavelength. The de Broglie wavelength for a particle with momentum p is given by dB = hp.

λ = h/mv

Where,

λ = wavelength of electron

m = mass of electron = 9.11e-31 kg

v = speed of electron = 1.59 × 10⁵ m/s

h = constant

Therefore,

λ = (6.626x10⁻³⁴J-s) ÷  [(9.11e-31 kg) (1.59 x 10⁵ m/s)]

λ = 0.4547 x 10⁻⁹ m

Thus, The de Broglie wavelength of an electron traveling at 1.59×105m/s is  0.4547 x 10⁻⁹ m.

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1 endothermic 2 yes and exothermic 3 endothermic

Option D. MgCl2 would have the smallest difference between experimental and ideal van 't Hoff factors. The answer is D.

The van 't Hoff factor (I) is a proportion of the degree of separation of a solute in an answer. The ideal van 't Hoff factor (I) accepts total separation, while the exploratory van 't Hoff calculate considers any deviation from this suspicion. The level of deviation is subject to elements like the size and charge of the particles. The ionic sweep and charge of the particles increment as we drop down and to one side on the occasional table. Accordingly, the littlest contrast between the exploratory and ideal van 't Hoff variables would be normal for the compound with the littlest particles and charges, which would be MgCl2. Thus, the response is D.

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The formula for butanol is C₄H₁₀O.

The subscript for H is 10.

The formula for butanol is C₄HₓO.

x = (6.0 × 10²⁴ H atoms/1 mol butanol)

× (1 mol butanol/6.022 × 10²³ molecules butanol)

= 10 H atoms/molecule butanol

∴ The formula for butanol is C₄H₁₀O.

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Butanol is composed of carbon, hydrogen, and oxygen. If 1.0 mol of butanol contains 6.0  1024 atoms of hydrogen, what is the subscript for the hydrogen atom in C4H2O?

Answer:

Electron affinity increases upward for the groups and from left to right across periods of a periodic table because the electrons added to energy levels become closer to the nucleus, thus a stronger attraction between the nucleus and its electrons.

Theoretically, if 20 grams of hydrogen reacts then 112.5 grams of ammonia is produced.

The balanced chemical equation can be given as:

N₂+3H₂→ 2NH₃

From stoichiometry, 2 mol of NH₃is produced from 3 mol of H₂

5 mol of NH₃ will be produced from = 3/2×5 = 7.5 mol of H₂

∴mass of H₂=7.5×2= 15gm of H₂.

Excess reagents are those reactants in a chemical reaction that are not exhausted at the end of the reaction. A completely exhausted or reacted reagent is called a limiting reagent because its amount limits the number of products formed. In this reaction, the excess reagent is Nitrogen as 35 grams of nitrogen and 15 grams of hydrogen react to produce 34 grams of ammonia.

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Electrically neutral atom oxygen will have an electron configuration of 1822s22p4.

In a neutral oxygen molecule, there are too 8 electrons. The electron setup 1s22s22p4 contains an add up to 8 electrons. Since it was demonstrated that this can be the electron setup of an impartial molecule, it must be oxygen.

Oxygen's nuclear number is 8, meaning that it has 8 protons within the cores of its particles. In a neutral oxygen molecule, there are too 8 electrons.

In nuclear material science and quantum chemistry, the electron setup is the distribution of electrons of a particle or atom in nuclear or atomic orbitals.

The external electrons have the most elevated vitality of the electrons in a particle and are more effectively misplaced or shared than the center electrons.

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Although part of your question is missing, you might be referring to this full question:

Which electrically neutral atom will have an electron configuration 1s22s22p4 that has a total of 8 electrons in it?

Answer:

0.119 moles

Explanation:

Given that,

Mass measured by Nurse Antonio is 7 grams of NaCl

To find,

The no of moles of NaCl

Solution,

The number of moles is given by

\(n=\dfrac{m}{M}\)

m is given mass

M is molar mass

For NaCl, molar mass is 23+35.5 = 58.5 grams

So,

\(n=\dfrac{7}{58.5}\\\\n=0.119\ \text{moles}\)

Therefore, there are 0.119 moles of NaCl.

Answer:

PLZZ like it tuk me to long to explan

Explanation:

The reaction between zinc and sulfur can be shown in what is called a chemical equation .  In words, we could write the reaction as:

zinc + sulfur → zinc sulfide

The more convenient way to express a chemical reaction is to use the symbols and formulas of the substances involved:

Zn + S → ZnS

The substance(s) to the left of the arrow in a chemical equation are called reactants.  A reactant is a substance that is present at the start of a chemical reaction.  The substance(s) to the right of the arrow are called products .  A product is a substance that is present at the end of a chemical reaction.  In the equation above, the zinc and sulfur are the reactants that chemically combine to form the zinc sulfide product.

There is a standard way of writing chemical equations.  The reactants are all written on the left-hand side of the equation, with the products on the right-hand side.  An arrow points from the reactants to the products to indicate the direction of the reaction:

reactants → products

When appropriate, a symbol may be written above or below the arrow to indicate some special circumstance.  The symbol “Δ” is often used to indicate that the reaction is to be heated.

The presence of the arrow also indicates that the reaction goes in one direction under the conditions indicated.  There are reactions which can be easily reversed, but we will not take those up right now.

There are a wide variety of reactions possible: elements may form compounds (as seen in the reaction above), compounds may form elements (water will break down in the presence of an electric current to form hydrogen gas and oxygen gas) or compounds may combine, break apart, or rearrange to form new materials.

Molality is defined as the number of moles of solute present in 1L of solution.

Molality (M) = No of moles of solute / 1 L of solution

Litre of solution = No of moles of solute / Molality

Molality = 0.220M

No of moles= 0.0170 mol

Volume in L = 0.0170/0.220

= 0.0772 L

Volume in mL = 77.27 mL

What is mole?

Therefore, Volume in ml of 0.220 m hbr solution is required to produce 0.0170 moles is 77.27 mL.

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Answer: A balanced chemical reaction is A balanced chemical equation where the number of atoms of each type in the response is the same on both reactants and product sides.

Explanation: Burning, and cooking are 2 examples.

Answer:

2.04x10⁻⁴ mol

Explanation:

First we convert 3.06x10⁻³ grams of glycine into moles of glycine, using its molar mass:

In order to calculate the number of hydrogen moles, we multiply the number of glycine moles by 5, as there are 5 hydrogen moles per glycine mol:

In magnesium oxide, MgO, the mole ratio of magnesium to oxygen is 1:1

Mole ratio refers to the ratio in which moles of elements combine to form compounds, or in which reactants combine to form products.

Mole ratio is calculated using the formula below:

When magnesium and oxygen combine to form magnesium oxide, MgO, the mole ratio of magnesium to oxygen is 1:1

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The frequency of gamma radiation is calculated to be = 1.11 *10^20 Hz.

A gamma radiation is also known as gamma ray. It is a penetrating form of electromagnetic radiation arising from radioactive decay of atomic nuclei. It consists of shortest wavelength electromagnetic waves, even shorter than X-rays.

Gamma rays can pass through the human body completely and as they pass through, they cause ionizations that damage tissue and DNA.

As we know that E= hf

Hence, f= E/h

Given E=  6.96 x 10-14 J

And, Planck's constant, h = 6.626 *10^-34 m² kg/s

f = 6.96 * 10^-14J  +/6.626 *10^-34

f = 1.11 *10^20 Hz

Hence, frequency of gamma radiation = 1.11 *10^20 Hz.

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Answer:

D. Liquid

Explanation:

It's mercury given the density and mercury's a metal that is liquid at room temperature

The covalent bond is present in the compound C₃H₈. The reactant C is 3, product C is 6, reactant H is 8, product H is 10, Reactant O is 2, product O is 9.

What is covalent bond ?

Atoms share electron pair between them in covalent bonds. H-H or C-H are examples of nonpolar covalent bonds between atoms with similar or identical electronegativity, whereas polar covalent bonds are formed when unequal electronegativity is shared between atoms (e.g., H–O).

What is reactant ?

Raw materials known as reactants combine to create products. When the right factors, such as temperature, time, or pressure, come into play, the chemical bonds between the reactants are broken, allowing the atoms to form new bonds that lead to various combinations.

Therefore, covalent bond is present in the compound C₃H₈. The reactant C is 3, product C is 6, reactant H is 8, product H is 10, Reactant O is 2, product O is 9.

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Answer:

the transition from water to steam is call evaporation.

Explanation:

water evaporates or vaporizes and turns into steam this typically happens when heat meets with the water. an example would be if you boil water steam will release from the pot, or when it rains, snows, etc (precipitation) the water evaporates and the ground dries.

The equation C2H4(g) + H2(g) + C2H6(g) → Caco3(s) + Cao(s) + CO2(g) shows an increase in entropy due to the formation of a gas as a product. Option A

In this equation, the reactants on the left-hand side consist of gases (C2H4 and H2), while the products on the right-hand side include a solid (Caco3) and a gas (CO2).

When a reaction involves a change from gaseous to solid or liquid states, there is typically a decrease in entropy because the particles become more ordered and constrained in the solid or liquid phase.

Conversely, when a reaction involves the formation of gases, there is generally an increase in entropy because gases have higher degrees of molecular motion and greater freedom of movement compared to solids or liquids.

In the given equation, the reactants include three gaseous compounds (C2H4, H2, and C2H6), and one of the products is a gas (CO2). Therefore, the overall entropy of the system increases during this reaction.

The equation Fe(s) + S(s) → FeS(s) does not show an increase in entropy. Both the reactants (Fe and S) and the product (FeS) are solids. Since solids have lower entropy compared to gases or liquids, the entropy of the system does not increase in this reaction. Option A

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Answer: The enthalpy of combustion of iso-octane in excess oxygen at 298 K is -5462.2kJ/mol

Explanation:

The balanced reaction for combustion of isooctane is:

\(C_8H_{18}(l)+\frac{25}{2}O_2(g)\rightarrow 8CO_2(g)+9H_2O(l)\)

The equation for the enthalpy change of the above reaction is:

\(\Delta H^o_{rxn}=[(8\times \Delta H^o_f_{(CO_2(g))})+(9\times \Delta H^o_f_{(H_2O(l))})]-[(1\times \Delta H^o_f_{(C_8H_{18}(g))})+(\frac{25}{2}\times \Delta H^o_f_{(O_2(g))})]\)

We are given:

\(\Delta H^o_f_{(H_2O(l))}=-285.83kJ/mol\\\Delta H^o_f_{(O_2(g))}=0kJ/mol\\\Delta H^o_f_{(CO_2(g))}=-393.51kJ/mol\\\Delta H^o_{C_8H_{18}(l)}=-258.07kJ/mol\)

Putting values in above equation, we get:

\(\Delta H^o_{rxn}=[(8\times (-393.51))+(9\times (-285.8))]-[(1\times (-258.07))+(\frac{25}{2}\times (0))]\\\Delta H^o_{rxn}=-5462.2kJ/mol\)

The enthalpy of combustion of iso-octane in excess oxygen at 298 K is -5462.2kJ/mol

Answer:

Explanation:

Weight = mass x gravity

mass given = 85 kg

gravity = 8.87 m /s²

Weight = 85 x 8.87 = 753.95 N .

Weight on Uranus = 753.95 N .

The depression in vapor pressure of the solution is the product of the vapor pressure of the solvent and its mole fraction. Similarly the elevation in boiling point is the product of molal elevation constant and molality.

Colligative properties are properties of a substance which changes with the change in number of moles. They are amount dependent properties..

1. Lowering of vapor pressure.

The addition of a non-volatile salt lower the vapor pressure of a solution than the pure solvent.

where, p (soln) = X solvent × P(solvent)

where x is the mole fraction.

2. Elevation of boiling point

Addition of non-volatile salt increases the boiling point of a compound. Here, the change in boiling point is:

ΔTb = kb m

where m is the molality and Kb is the molal elevation constant of the solvent. It is expressed in kelvin or degree Celsius.

Depression in freezing point also written as:

ΔTf = kf m

4. Osmotic pressure is the pressure needed to stop the flow of solvent molecules through a semipermeable membrane.

π = i MRT

where i is the Vant hoff factor and M is the molecular weight,

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The options of your question include,

(1 ). Vapor pressure lowering

(3).  Boiling point elevation

(3).  Freezing point depression

(4).  Osmotic pressure