What is wrong with the chemical reaction written below?
REACTANT(S)
PRODUCTS
Magnesium + Chlorine ------>
Magnesium Chloride
12 g Magnesium
+
8 g Chlorine
25 g Magnesium Chloride
a) Magnesium will never react with chlorine
b) The mass of your total product is greater than your total reactants
c) The name of the product is incorrect
d) Nothing is wrong with the above reaction-it is perfectly correct as written!

In the given statements: 1 and 2 are hypotonic solutions, 4, 6, and 7 are hypertonic solutions, and 3, 5, and 8 are isotonic solutions.

Hypotonic solution is the kind of solution in which the solute has a lower concentration than the other solution which is the solvent. Water particles will move into the cell, causing the cell to expand and eventually lyse or burst.

A hypertonic solution is a solution in which the solute's concentration is higher than the concentration of the solvent. Here, water particles move out of the cell causing crenation, shrinking, and shriveling of the cell.

An Isotonic solution is a solution that has the same solute concentration as the solvent. There is no evident net movement of particles from one solution to other, and therefore the overall concentration remains constant.

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Answer:

Leaches aluminum from the soil.

Explanation:

The observation of a smaller outside hole than inside leads Becca to infer that an impact from the outside caused the hole, with a larger object striking and passing through the window from the inside.

From the observation that the hole in the window is smaller on the outside than on the inside, Becca, as a forensic technician, might deduce the following:

The hole was caused by an impact from the outside: The smaller outside hole suggests that the force that created the hole originated from the outside and exerted more pressure on the window surface facing inward.

The object causing the hole was larger on the inside: The discrepancy in hole sizes implies that the object that struck the window had a larger size or diameter on the inside, and as it penetrated the glass, it compressed or fragmented the glass, resulting in a larger hole on the inside.

The object may have passed through the window: The difference in hole sizes indicates that the object may have penetrated the window, potentially passing through to the inside. This could suggest a break-in or an incident involving the window being struck from the outside.

Overall, the observation of a smaller outside hole than inside leads Becca to infer that an impact from the outside caused the hole, with a larger object striking and passing through the window from the inside.

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Answer:

Dung dịch nào sau đây chỉ chứa các ion (bỏ qua sự điện li của nước, các chất điện li mạnh phân li hoàn toàn)?

A. HBr, Na2S, Mg(OH)2, Na2CO3.

B. H2SO4, NaOH, NaCl, HF.

C. HNO3, H2SO4, KOH, K2SiO3.

D. Ca(OH)2, KOH, CH3COOH, NaCl.

The two functional groups that the aminoacid has according to the picture are amine and carboxyl.

In chemistry and related areas, a functional group can be defined as a group of atoms bonded in a specific molecule that can affect the was the molecule reacts or the specific behavior of it.

In the case of the molecule presented, which is an amino acid, two functional groups can be identified:

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Answer:

d

Explanation:

it's basic chemistry. electrons are negative and travel around the outside. neutrons are neutral and in the nucleus with the proton

Find the volume of oxygen that reacts with 1.12 L of NH3.

\(4NH {\tiny{3}} + 5 0{ \tiny{2 }} \: \: -> \: 4 NO + 6H{ \tiny{2}}O\)

0 0.896 L

O 1.4L

0 1.12

0 561

\(4NH {\tiny{3}} + 5 0{ \tiny{2 }} \: \: -> \: 4 NO + 6H{ \tiny{2}}O\)

4 moles of NH3 reacts with 5 moles of O2

so:-

1 mole of NH3 reacts with 5/4 moles of O2

Number of moles given of NH3 :-\( \frac{1.12}{22.4} moles\)

For given moles :-

\( \frac{1.12}{22.4} mole \: of \: NH { \tiny3 }\: reacts \: with \: \frac{5}{4} \times \frac{1.12}{22.4} moles \: of \: O2 \)

So numbers of moles of O2 required:-

\( \frac{5 \times 112}{100 \times 4 \times 22.4} \\ = \frac{5 \times \cancel{112} {}^{ \: \: 28} }{100 \times \cancel{ 4} \times 22.4} \\ = \frac{ \cancel5 \times \cancel{28} {}^{14} }{{\cancel{100} {}^{10} }\times 22.4} = \frac{1.4}{22.4} moles\)

To convert it into volume of gas in lts just multiple it with 22.4 lts :-

\( \frac{1.4}{22.4} \times 22.4 \: \: lts \\ \frac{1.4}{ \cancel{22.4}} \times \cancel{22.4} \: \: lts \\ 1.4lts \: is \: your \: answer\)

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:

Answer:

Millimeter can be used to describe the width of a small piece of metal

Explanation:

The most appropriate unit to describe the width of a small piece of metal would be millimeters (mm). Millimeters are commonly used to measure small lengths or dimensions, such as the width of objects. This unit provides a precise and accurate measurement for small-scale items.

Ounces (oz) are typically used to measure weight or volume and may not be suitable for describing the width of an object.

Moles (mol) are used in chemistry to quantify the amount of a substance, so it is not relevant for measuring dimensions.

Milliliters (ml) are used to measure volume, specifically the capacity of liquids, and are not typically used to describe the width of a solid object.

Therefore, when discussing the width of a small piece of metal, millimeters (mm) would be the appropriate unit as it specifically measures small lengths or dimensions.

AI said C. Millimeter.

I hope this helped! :)

How much of the original sample will still be there at the end of the second year if the half-life of a radioactive isotope sample is one year? by the third year's end?

when the fourth year comes to an end? Answer The balance at the conclusion of the second year equals 1 4 times the initial amount. The balance at the conclusion of the third year is equal to 1/8 of the initial amount. Radioactive isotopes that are unstable usually undergo radioactive decay in order to become stable. The nucleus of the isotope undergoes a spontaneous nuclear transition during this event, and particles and energy are released. The decay process causes half of the isotope's initial mass to disintegrate at a specific point in time known as the half-life.

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The limiting reactant would be the ammonium sulfide and the amount of the excess manganese (IV) fluoride would be 1.96 grams

From the equation of the reaction:

\(MnF_4(aq)+2(NH_4)_2S(aq)- > MnS_2(s)+4NH_4F(aq)\)

The mole ratio of \(MnF_4\) to \((NH_4)_2S\) is 1:2

Mole of 70 g \(MnF_4\) = 70/130.93

                                 = 0.53 moles

Mole of 70 g  \((NH_4)_2S\) = 70/68.154

                                       = 1.03 moles

Equivalent mole of   \((NH_4)_2S\) = 0.53 x 2

                                                = 1.06 moles

Thus,   \((NH_4)_2S\) seems to be limiting while \(MnF_4\) is in excess.

Excess \(MnF_4\) = 0.53 - 1.03/2

                          = 0.015 mole

Mass of 0.015 mole \(MnF_4\) = 0.015 x 130.93

                                             = 1.96 grams

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Answer:

The net ionic equations for both the reactions are same so they have identical ΔH neutralization

H⁺ + OH⁻ ------ H₂O

Explanation:

The heat of neutralization for HBr reacting with KOH is similar to the  heat of neutralization for HNO3 reacting with NaOH because they are both strong acid - strong base reactions.

A strong acid is an acid that ionizes completely in solution while a strong base is a base that ionizes completely in solution. A strong acid or base achieves almost 100% ionization in solution. A weak acid or base only ionizes to a very small extent in water.

In both cases of HBr reacting with KOH and HNO3 reacting with NaOH, we have a strong acid - strong base reaction hence the heat of neutralization of both reaction will be identical. Secondly, the both reactions have the same net ionic equation; H^+(aq) + OH^-(aq) -----> H2O(l)

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The decomposition of aspirin (acetylsalicylic acid,\(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)).

The decomposition of aspirin (acetylsalicylic acid, \(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)). To determine the moles of each product formed, we need to consider the balanced chemical equation for the reaction:

\(C_{9} H_{8} O_{4} = > C_{7} H_{6}O_{3} +CH_{3} COOH\)

From the equation, we can see that for every 1 mole of aspirin, 1 mole of salicylic acid and 1 mole of acetic acid are produced.

Therefore, the moles of salicylic acid and acetic acid formed will be equal to the number of moles of aspirin that decomposes. If we know the amount of aspirin in moles, we can directly calculate the moles of each product based on stoichiometry.

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One mile of He atoms has a bigger mass than one mole of H atoms because there are 2.406 × 10²⁶ He atoms compared to 6.022 × 10²³ H atoms.

We can observe that there are roughly twice as many hydrogen atoms as helium atoms. As a result, due to the fact that hydrogen is a diatomic molecule and therefore exists in a gaseous state, there are twice as many atoms in one mole of hydrogen gas as there are in one mole of helium gas.

This can be computed using the formula:

1 mile = 1609.34 meters.

1 mile of He atoms = (4 grams/mol) x (1609.34 meters/4.0026 grams) x (6.022 × 10²³ atoms/mol) =  2.406 × 10²⁶ atoms.

1 mole of H atoms = 1 gram/mol × (atoms/mol) = atoms.

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Answer:

first choice

Explanation:

energy is written on the left side is its absorbed

2 elements came together so bonds are formed.

Hi just wanted to say thank you for answering my question and I wanted to help so I believe the answer is A.

If more energy is absorbed than what is released during bond breaking and forming, the reaction is endothermic.

When bonds in the reactants are broken in endothermic reactions, greater energy is absorbed than emitted when new bonds are created in the products.

The energy required to break existing bonds in endothermic processes is more than the energy released when new bonds are generated. In an exothermic process, more energy is generated when new bonds are created than is consumed when old ones are broken.

If more energy is absorbed than what is released during bond breaking and forming, the reaction is endothermic.

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Answer:

b

Explanation:

im pretty sure could be wrong

Answer:

B is your answer. Silicone has 4 valence electrons.

Answer:

(4) concentrated and supersaturated

Explanation:

At 50.°C, 90g of KNO3 lies above the solubility curve [on the Regents Reference Table G]. This indicates that the solution is supersaturated, meaning it contains more solute than will naturally dissolve, and was formed when a saturated solution cooled. Furthermore, the percent concentration of this solution is 90% KNO3 making this solution concentrated. This can be calculated using the formula for mass percent concentration.

Percent Mass = Mass of Solute (g) x 100

                         Mass of Solution (g)

Given solution is considered as concentrated and supersaturated.

Supersaturated solutions are those solutions in which no. of dissolved solute is more and added to the saturated solution of that solute.

In the question given that,

Weight of solute or KNO₃ = 90 g

Weight of solvent or water = 100 g

Temperature = 50°C

According to the solubility curve, given solution is supersaturated because it contains excess amount of solute and it is concentrated because solute in dissolve in the saturated solution at nearly high temperature and after cooling we get the consistent solution.

Hence, option (4) is correct i.e. given solution is concentrated and supersaturated.

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No it’s not balanced. The Na are not balanced (option A)

the given chemical equation is not balanced because It is missing some coefficients to balance the number of atoms on both sides of the equation.

The balanced chemical equation for the reaction is:

Na2SO4 + Mg(OH)2 → MgSO4 + 2NaOH

This equation shows that two molecules of sodium hydroxide (NaOH) are produced for every one molecule of magnesium hydroxide (Mg(OH)2) consumed, and that the number of sodium (Na) atoms is balanced on both sides of the equation.

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Answer:

0.0560 mol

Explanation:

You need to use the ideal gas law equation:

\(PV = nRT\)

P = 750 torr

V = 1.35 L

n = moles

R = 62.364 L torr \(mol^{-1}\) \(K^{-1}\)

T = 17.0 ˚C + 273.15 = 290.15 K

Rearranging the equation for n:

\(n= \frac{PV}{RT}\)

\(n= \frac{(750)(1.35)}{(62.364)(290.15)}\)

n = 0.0560 mol

Answer:

n=PV/RT

Explanation:

on edge 2020

Answer:

D. +3

Explanation:

You're Welcome

3.6 atm is the pressure inside the container after 243 mg of magnesium has reacted.

Pressure is defined as the force applied perpendicularly to an object's surface divided by the area over which that force is applied.

The reaction given is: Mg(s) + 2HCl(aq) → MgCl2(s) + H2(g). The moles of H2 gas formed are therefore equal to the moles of Mg that reacted, and can be calculated from: n = 0.243 g/(24.3 g/mol) = 0.01 moles (converting 243 mg to 0.243 g).

The added pressure is calculated by P = nRT/V using approximations: 0.08 L atm/molK for R (0.0821 rounded), 300K for T (303.15 before rounding) and 0.10 L for V.

Solving gives pressure = 2.4 atm. Finally, this number must be added to the initial pressure: 2.4 + 1.2 = 3.6 atm.

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Urine has the color of pale yellow to deep amber. It is odorless and has a pH of 4.5-8.0

Anything that can be weighed and takes up space is considered matter. Therefore, matter has both mass and volume.

Pure substances are those that contain only one type of particle and are devoid of any mixtures. Iron, aluminum, silver, and gold are some examples of pure substances.

A combination is said to be heterogeneous if its composition is not constant throughout. Vegetable soup is a complex concoction. Each mouthful of soup will have differing percentages of the various veggies and other ingredients.

A mixture is said to be homogenous if its composition is constant throughout. Because the dissolved salt is evenly distributed throughout the whole salt water sample, the salt water described above is homogenous.

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83.246 ounces of silver is required to make the silver figure.

It is given that 10.49 g/cm^3 is the density of silver at Room temperature and the volume of Silver is 225cm^3.

To prepare silver of 225cm^3 of volume, we require the following:

Density = Mass/Volume

Mass = Density x Volume

Amount of silver = 10.49x225

Amount of silver = 2360.25 g

We know that,

100g = 3.5274 ounces

Then,

= 3.5274/100

= 0.035274 ounces of silver.

The mass of silver required in ounces = 2360.25 x 0.035274

The mass of silver in ounces = 83.246 ounces.

Therefore the mass of silver needed in ounces is 83.246 ounces. Through this conversion, the amount of any substance can be converted from kilograms to ounces.

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Answer:Condensation

Evaporation

melting

ionization

Explanation:

Hope this helps :)

From a gas to a liquid: This is called condensation ; From a liquid to a gas: This is called evaporation or vaporization ; From a solid to a liquid: This is called melting ; From a gas to a plasma: This is called ionization.

Process by which water vapor in air is changed into liquid water is called condensation.

From a gas to a liquid: This is called condensation. It occurs when gas loses heat energy and particles start to slow down and move closer together, eventually forming liquid.

From liquid to a gas: This is called evaporation or vaporization. It occurs when liquid gains enough energy to break the intermolecular forces between the particles, causing them to become gas.

From a solid to liquid: This is called melting. It occurs when solid absorbs enough energy to overcome the intermolecular forces holding its particles together, causing particles to move more rapidly and become liquid.

From a gas to a plasma: This is called ionization. It occurs when gas is subjected to strong electric field, heat, or radiation and some or all of atoms or molecules lose their electrons, creating positively charged ions and negatively charged electrons. This mixture of charged particles is called plasma.

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The mass of the solid aluminum that forms are 192.73 grams

To determine the mass of solid aluminum that forms, we need to use stoichiometry and the balanced chemical equation for the reaction between magnesium and aluminum nitrate.

The balanced chemical equation is:

3 Mg + 2 Al(\(NO_{3}\))3 → 3 Mg(\(NO_{3}\))2 + 2 Al

The equation shows that 3 moles of magnesium react with 2 moles of aluminum to produce 2 moles of aluminum nitrate.

To calculate the mass of solid aluminum, we need to know the amount of magnesium used. Given that the volume of the magnesium is 150.0 mL and its density is 1.738 g/cm³, we can calculate the mass of magnesium using the formula:

Mass = Volume × Density

Mass of magnesium = 150.0 mL × 1.738 g/cm³ = 260.7 g

Now, using the molar mass of magnesium (24.31 g/mol) and the molar ratio from the balanced equation, we can determine the moles of magnesium used:

Moles of magnesium = Mass of magnesium / Molar mass of magnesium

= 260.7 g / 24.31 g/mol

= 10.72 mol

According to the stoichiometry of the balanced equation, the ratio of moles of magnesium to moles of aluminum is 3:2. Therefore, the moles of aluminum formed will be:

Moles of aluminum = (2/3) × Moles of magnesium

= (2/3) × 10.72 mol

= 7.15 mol

Finally, we can calculate the mass of solid aluminum using its molar mass (26.98 g/mol):

Mass of aluminum = Moles of aluminum × Molar mass of aluminum

= 7.15 mol × 26.98 g/mol

= 192.73 g

Therefore, the mass of the solid aluminum that forms is approximately 192.73 grams.

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