Identify the acid and base which form sodium hydrogen carbonate . Write chemical equation in support of your answer. State whether its compound is acidic, basic or neutral. Also write its pH value.

The balanced equation for the single-displacement reaction between AgNO3 and Al is:
3AgNO3 + Al -> Al(NO3)3 + 3Ag

In this reaction, aluminum (Al) displaces silver (Ag) from silver nitrate (AgNO3), resulting in the formation of aluminum nitrate (Al(NO3)3) and elemental silver (Ag).

The coefficients in the balanced equation ensure that the number of atoms of each element is the same on both sides of the equation, indicating a conservation of mass.

Phases (solid, liquid, aqueous) can be included if known, but they are optional for this equation.

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Answer:39+30

Explanation:

Answer:

Explanation:

The responding variable always is measured against the variable that you have control over.

In this case, you have control over the volume of air.

The responding variable is the amount the plant has grown.  This would be a good long term experiment to try for a science fair or just because you might be interested. It's a good simple idea.

Answer:

72 g/L

Explanation:

The dissolved amount of solute is the difference between the amount you have poured and the amount that precipitated:

125 g - 35 g = 90 g

Thus, 90 grams of solute were dissolved in 1.25 liters. The saturation point is the ratio between the grams dissolved and the volume in liters:

saturation point = 90 g/1.25 L = 72 g/L

Answer:

B. Cutting the supplies of oxygen

Lachrymators like benzyl bromide are specifically dangerous because of their explosion hazard. This statement is false.

Lachrymators are the substances that are employed to cause non-lethal irritation in humans, such as inducing tears or coughs, as a method of crowd control and in riot control. The tears or other forms of discomfort experienced by the victim provide a distraction from the ongoing conflict, enabling law enforcement or military personnel to subdue or detain the target with less force.

Lachrymators, or tear gas, are used to control riots and protests. It's known for its ability to cause tears, which can be extremely uncomfortable. In addition, it can irritate the eyes and respiratory system, causing coughing and difficulty breathing.

However, Lachrymators aren't specifically dangerous because of their explosion hazard. It's dangerous because it can cause eye and respiratory irritation. Benzyl bromide, on the other hand, is not a lachrymator, but it is a toxic substance that can cause severe harm if inhaled. Benzyl bromide is a colourless, fuming liquid with an acrid odour that is used as a laboratory reagent.

It's highly reactive and corrosive, causing burns if it comes into touch with skin or eyes. Inhaling benzyl bromide can cause throat and lung irritation, and long-term exposure can cause neurological damage. Benzyl bromide is not a tear gas or lachrymator, and it is not commonly used in crowd control. Rather, it is a highly reactive chemical that should only be handled with extreme caution.

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We must first determine the number of moles of sodium chloride we require in order to respond to this issue. To accomplish this, we can apply the molarity formula: Molarity is calculated as moles of solute/volume of solution.

The molarity in this instance is 0.25 M, the solute's molecular weight is unknown, and the solution's volume is 40 mL. To solve for moles of solute, we can change the formula: moles of solute = molarity x volume of solution.

As a result, 10 moles of solute are equal to 0.25 M times 40 mL. Since we now know how many moles of sodium chloride are required, we can use its molar mass (58.0 g/mol) to determine how many grammes are required. The following equation might be used: mass of solute = moles of solute x.

Mass of solute = moles of solute x molar mass of solute is the formula we can apply. Mass of solute is therefore equal to 10 moles times 58.0 g/mol, or 580 grammes. In conclusion, 40 mL of a 0.25 M NaCI solution requires 580 grammes of sodium chloride.

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Answer:

First Blank: 656.3 kJ

Second Blank: Endothermic

Explanation:

Edge 21'

Answer:

1.  656.3

2.  endothermic

Explanation:

Answer:

chemoautotrophs

Explanation:

sunlight gives energy to living things

Explanation:

sun is the main energy for the earth

The problem is asking for the amount of heat that must be removed from 5 grams of water vapor at 110 degrees Celsius to make 5 grams of ice at -10 degrees Celsius. To solve the problem, we can use the formula Q = m·ΔH, where Q is the amount of heat transferred, m is the mass of the substance, and ΔH is the specific heat of the substance.

The first step is to find the amount of heat required to cool the water vapor from 110 degrees Celsius to 100 degrees Celsius. We can use the formula Q = m·Cp·ΔT, where Cp is the specific heat of water vapor and ΔT is the change in temperature. Q = 5 g · 1.996 J/g°C · (110°C - 100°C) = 99.8 J. Next, we need to find the amount of heat required to condense the water vapor into liquid water at 100 degrees Celsius.

We can use the formula Q = m·ΔHvap, where ΔHvap is the heat of vaporization of water. Q = 5 g · 40.67 J/g = 203.35 J. Now we need to find the amount of heat required to cool the liquid water from 0 degrees Celsius to -10 degrees Celsius. We can use the formula Q = m·Cp·ΔT, where Cp is the specific heat of liquid water and ΔT is the change in temperature. Q = 5 g · 4.184 J/g°C · (0°C - (-10°C)) = 209.2 J.

Finally, we need to find the amount of heat required to freeze the liquid water into ice at -10 degrees Celsius. We can use the formula Q = m·ΔHfus, where ΔHfus is the heat of fusion of water. Q = 5 g · 334 J/g = 1670 J. Now we can add up all the amounts of heat to get the total amount of heat that must be removed from the water vapor: Qtotal = Q1 + Q2 + Q3 + Q4 = 99.8 J + 203.35 J + 209.2 J + 1670 J = 2182.35 J. Therefore, 2182.35 J of heat must be removed from 5 grams of water vapor at 110 degrees Celsius to make 5 grams of ice at -10 degrees Celsius.

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Answer:

\(\boxed {\boxed {\sf 9.6 \ mol \ KCl}}\)

Explanation:

We must use stoichiometry to solve this, which is the calculation of reactants and products in a reaction using ratios.

Let's analyze the reaction given.

\(MgCl_2 _{(aq)} + K_2SO_4 _{(aq)} \rightarrow 2KCl _{(aq)} + MgSO_4 _{(s)}\)

Now, look at the coefficients, or numbers in front of the molecule formulas. If there isn't a coefficient, then a 1 is implied.

We want to find how many moles of potassium chloride (KCl) are produced from 4.8 moles of magnesium chloride (MgCl₂). Check the coefficients for these molecules.

The coefficient represents the number of moles. Therefore, 1 mole of magnesium chloride produces 2 moles of potassium chloride. We can set up a ratio using this information.

\(\frac { 1 \ mol \ MgCl_2} {2 \ mol \ KCl}\)

Multiply by the given number of moles of magnesium chloride: 4.8

\(4.8 \ mol \ MgCl_2 *\frac { 1 \ mol \ MgCl_2} {2 \ mol \ KCl}\)

Flip the ratio so the moles of magnesium chloride cancel out.

\(4.8 \ mol \ MgCl_2 *\frac {2 \ mol \ KCl} { 1 \ mol \ MgCl_2}\)

\(4.8 *\frac {2 \ mol \ KCl} { 1 \ } }\)

\(4.8 * {2 \ mol \ KCl}\)

\(9.6 \ mol \ KCl\)

9.6 moles of potassium chloride are produced from 4.8 moles of magnesium chloride.

Answer:

The answers to your questions are given below

Explanation:

1. 3 Na2SO4

Molecules of Na2SO4 = 3

Na (sodium) = 3 x 2 = 6

S (sulphur) = 3 x 1 = 3

O (oxygen) = 3 x 4 = 12

2. 4 Pb(NO3)2

Molecules of Pb(NO3)2 = 2

Pb (lead) = 4 x 1 = 4

N (nitrogen) = 4 x 2 x 1 = 8

O (oxygen) = 4 x 3 x 2 = 24

When the cold balloon filled with 2.30 L of helium is brought into the salt-conditioned car, the balloon is likely to shrink or decrease in size.

The volume of a gas is directly affected by temperature. When the cold balloon filled with helium is brought into a salt-conditioned car, the temperature inside the car is likely to be lower than the temperature outside. As a result, the temperature of the helium gas inside the balloon will decrease. According to Charles's Law, the volume of a gas decreases with a decrease in temperature, assuming constant pressure. Therefore, the helium gas inside the balloon will contract, causing the balloon to shrink or decrease in size.

Thus, the balloon will shrink or decrease in size when brought into the salt-conditioned car.

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0.6183 × 10²³ molecules  are present in 6 grams of NaCl . This is taken out by mole concept .

The concept of a mole is a way to quantify the amount of something that is present. Experimental data shows that one gram of any substance's molecule and one gram of any element's atom contain the same number of entities. The empirically determined value is 6.022137 ×10²³. The problem of knowing the precise atomic masses of atoms was overcome after the mole idea was discovered. This is done so that the mole idea can be used to calculate the number of atoms or molecules in a specific amount of a substance. The way substance amounts are expressed is known as the "mole idea."

Sodium chloride is the salt that most significantly contributes to the salinity of seawater and the extracellular fluid of many multicellular organisms. In its edible form, table salt, often known as salt, is frequently used as a condiment and food preservative. Sodium chloride is a substantial source of the salt and chlorine compounds used as feedstocks for additional chemical synthesis, and it is utilized in huge quantities in a number of industrial processes. One of sodium chloride's other primary purposes is to deice roadways during cold weather. A number of chemicals, which make up the bulk of goods manufactured globally, are directly or indirectly synthesized with the aid of salt.

1 mole of NaCl i.e. 58.44g of NaCl will contain 6.022137× 10²³ molecules

So,

6 g NaCl will contain\(\frac{ 6.022 * 10^2^3}{58.44}\)× 6

molecules = 0.6183 × 10²³

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The product is 1-methylcyclopentanol which is an alcohol .

What is an alcohol ?

In chemistry, an alcohol is a type of organic compound that carries at least one hydroxyl functional group (−OH) bound to a saturated carbon atom. The term alcohol originally referred to the primary alcohol ethanol (ethyl alcohol), which is used as a drug and is the main alcohol present in alcoholic drinks. An important class of alcohols, of which methanol and ethanol are the simplest examples, includes all compounds which conform to the general formula CnH2n+1OH. Simple monoalcohols that are the subject of this article include primary (RCH2OH), secondary (R2CHOH) and tertiary (R3COH) alcohols.

Therefore the nature of the compound is alcoholic.

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Answer:

1.Irreversible

2.Physical

3.

Answer:

they are only efficient in certain areas

Explanation:

Wind turbine are efficient only in certain areas it is a problem with using wind turbines to produce energy.

Wind turbine convert the wind energy into the electricity. It is a power generating device that converts the kinetic energy in to electrical energy.

Now lets check all option one by one:

Option (A): Wind turbines are efficient only in certain areas it is a problem with using wind turbines to produce energy because the flow of air from areas of high pressure towards the lower pressure.

So, it is correct option.

Option (B): Wind turbines occupy a lot of space to work.

So, it is incorrect option.

Option (C): Wind turbines produce a large amount of energy is not a problem.

So, it is incorrect option.

Option (D): Wind turbines does not create a pollution or it does not pollute the air or water.

So, it is incorrect option.

Thus, we can say that Wind turbines are efficient only in certain areas it is a problem with using wind turbines to produce energy because the flow of air from areas of high pressure towards the lower pressure.

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i guess this is the answer .

True. Do not use oil-based products such as Vaseline and body lotions because they destroy latex. Latex is a natural rubber, and when it comes into contact with oil-based products, it reacts chemically.

This reaction causes latex to degrade and lose its elasticity, making it prone to breakage. Therefore, it is important to avoid oil-based products when using latex products, such as condoms, gloves, and other medical supplies. Instead, use water-based products that are safe to use with latex. Water-based products are gentle on the skin and do not react chemically with latex, making them ideal for use with latex products.

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The major 1,2- and 1,4-addition products formed when a diene reacts with HBr are as follows:

1. For the 1,2-addition product: The diene reacts with HBr, and one of the double bonds undergoes addition with the hydrogen of HBr at the 1,2-position. This results in the formation of a monosubstituted alkyl bromide.

2. For the 1,4-addition product: The diene reacts with HBr, and the two double bonds undergo a concerted reaction with HBr. This leads to the formation of a cyclohexane ring, with the bromine atom attached at the 1,4-position.

In the 1,2-addition product, the HBr adds directly to one of the double bonds, resulting in a monosubstituted alkyl bromide. This is known as the Markovnikov addition. On the other hand, in the 1,4-addition product, the diene undergoes a concerted reaction, where both double bonds react simultaneously with HBr.

This results in the formation of a cyclohexane ring with the bromine atom attached at the 1,4-position. The 1,4-addition product is known as the anti-Markovnikov addition. The selectivity of these additions is determined by the stability of the carbocation intermediate formed during the reaction.

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When copper replaces graphite as the anode, it results in a change in chemistry because the copper oxidizes, releasing electrons.

What is electron?
The elementary electric charge of the electron is a negative one, making it a subatomic particle. Due to their lack of components or substructure, electrons, which are part of the lepton particle family's first generation, are typically thought to be elementary particles. The mass of an electron is roughly 1/1836 that of a proton. The electron has a half-integer intrinsic angular momentum (spin) that is expressed in terms of the reduced Planck constant,, among its quantum mechanical properties. Since electrons are fermions, the Pauli exclusion principle which states that no two electrons can be in the same quantum state.

When copper replaces graphite as the anode, it results in a change in chemistry because the copper oxidizes, releasing electrons. This oxidation reaction is the basis of electrochemical energy conversion in a battery. However, when copper replaces graphite as the cathode, there is no change in chemistry because no oxidation or reduction reactions take place. The electrons simply flow through the copper to the anode, where they are combined with oxygen to form water.

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The correct order of increasing electronegativity for the given set of elements is: s, p, si, f, where fluorine (F) has the highest electronegativity and sodium (Na) is not included in the set.

Electronegativity is a property that describes the tendency of an atom to attract electrons towards itself when it is part of a chemical bond. In general, electronegativity increases across a period from left to right and decreases down a group in the periodic table.

Looking at the given sets of elements: p, f, si, s and s, f, p, si, we can determine the order of increasing electronegativity.

The correct set of elements arranged in order of increasing electronegativity is: s, p, si, f.

Fluorine (F) is the most electronegative element in the periodic table, and it attracts electrons strongly due to its small atomic size and high effective nuclear charge. Therefore, it has the highest electronegativity.

Following fluorine, oxygen (O) has a higher electronegativity than sulfur (S), which in turn has a higher electronegativity than phosphorus (P). This is because electronegativity generally increases across a period from left to right.

Silicon (Si) is less electronegative than phosphorus but more electronegative than sulfur. It is positioned in the middle of the order.

Lastly, sodium (Na) is less electronegative than silicon and is not included in the given set.

(Note: The set s, f, p, si is not in the correct order of increasing electronegativity, as fluorine should have the highest electronegativity.)

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Answer:

70°C,130.9 ................,...

Answer:

kurissso pogosiposyoo

Explanation:

GaBr3 is called gallium tribromide. It is composed of one gallium atom and three bromide atoms. Within a molecule of gallium tribormide, there are three bonding electron pairs and zero lone pairs of electrons. Such a configuration results in the trigonal planar molecular shape.

Answer:

GaBr3 is called gallium tribromide.

Explanation:

It is composed of one gallium atom and three bromide atoms. Within a molecule of gallium tribormide, there are three bonding electron pairs and zero lone pairs of electrons. Such a configuration results in the trigonal planar molecular shape.

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If the hydrogen gas is combusted and produces 645L of water vapor at 400 kelvin and 1.75 atm, 2796.96 g mass of the zinc is produced .

Using the ideal gas law equation:

PV = nRT

n = (PV) / (RT)

= (1.75 atm * 645 L) / (0.0821 atm·L/(mol·K) * 400 K)

= 42.71 moles

the balanced equation for the reaction between zinc and hydrochloric acid:

Zn + 2HCl -> \(ZnCl_{2}\)  + \(H_{2}\)

1 mole of zinc produces 1 mole of hydrogen gas. Therefore, the moles of zinc are also 42.71.

The molar mass of zinc is 65.38 g/mol.

Mass of zinc = moles of zinc * molar mass of zinc

= 42.71 moles * 65.38 g/mol

= 2796.96 g

Therefore, the mass of the zinc is 2796.96 grams.

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