Decide whether or not each of the following metals dissolves in 1M HCl. For these metals that do dissolve, write a balanced redox reaction showing what happens when the metal dissolves.
Part A:
Cu
Express your answer as a chemical equation. Enter "no reaction" if there is no reaction. Identify all of the phases in your answer.
Part B:
Fe
Express your answer as a chemical equation. Enter "no reaction" if there is no reaction. Identify all of the phases in your answer.
Part C:
Na

When you add acid to a starch solution, a chemical reaction occurs. This reaction is known as hydrolysis, where water molecules are split into hydrogen ions (H+) and hydroxide ions (OH-). The hydrogen ions from the acid combine with the starch molecules to break down the starch into simpler forms, such as glucose.

At the molecular level, starch is a complex carbohydrate made up of long chains of glucose molecules. When acid is added, the acid provides the hydrogen ions needed to break the bonds between the glucose molecules. This leads to the breakdown of starch into smaller glucose units.

On the other hand, when you mix glucose with water, you have a simple sugar dissolved in a liquid. The glucose molecules are already in their simplest form and can easily dissolve in water.

Therefore, when you compare the acid-starch reaction to the glucose-water mixture, the acid-starch reaction more closely resembles the starch-water mixture. In both cases, the starch is broken down into simpler forms.

In summary, when acid is added to a starch solution, it undergoes hydrolysis, breaking down the starch into smaller glucose units. This process is similar to the breakdown of starch in the presence of water, as the acid provides the necessary hydrogen ions for the reaction.

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Answer: c

Explanation: I took it

Answer:

IT WILL HOVER IN THE MIDDLE

Explanation:

Explanation:

1. cryolite

2. cell

3. bauxite

4.

5.

6.

7.

8.

9. replaced

this is all I know. I'm sorry I could not answer all

Answer:Scientists used the model to make predictions. Sometimes the results of their experiments were a surprise and they did not fit with the existing model. Scientists changed the model so that it could explain the new evidence. The discovery of electrons. Atoms can be broken down into smaller parts.

Explanation:

Answer:

The law of conservation of mass states that mass can not be created nor destroyed. This law applies to chemical reactions as the mass of the atoms stays the same, even after the reaction.

Answer:

The triple beam balance

Answer: The given statement is True.

Explanation:

An ionic bond is formed when an element completely transfers its valence electron to another element. The element which donates the electron is known as electropositive element and the element which accepts the electrons is known as electronegative element. This bond is formed between a metal and an non-metal.

A covalent bond is formed when an element shares its valence electron with another element. This bond is formed between two non metals.

Thus the given statement is True.

Answer:

1. at least two charged interacting parts

2. from the electric fields of charged subatomic particles

3 an arrow released from the bow

4Electrical fields of charged particles interact, bonding those with opposite charges.

5 the interaction of the electric fields of protons and electrons

6 The energy stored in the system increases.

7 Kinetic energy increases because the magnets move in the direction of the field.

8 Iron pieces accelerate toward the magnet, and the energy stored in the system decreases.

9  

The energy stored in the field decreases because the magnet moves in the direction of the field.

10 The energy stored increases and then decreases.

11 The wire was not connected to the source.

12  The electromagnet will become more powerful.

From the electric fields of charged subatomic particles, at least two charged interacting pieces, an arrow launched from the bow, Interaction between electrical fields of charged particles bonds those with opposing charges, the interaction between the protons' and electrons' electric fields.

An electric field is a physical field that surrounds electrically charged particles and acts as an attractor or repellent to all other charged particles in the vicinity. It can also refer to a system of charged particles' physical field.

The area of space surrounding an electrically charged particle or object in which the charge body perceives force is known as the electric field. Examples: -Charges and their arrangements, such as capacitors and battery cells, produce electric fields.

We can produce current flow by applying the pushing force required by electric fields. A circuit's electric field resembles an electron pump in that it is a sizable source of negative charges that can drive electrons.

Thus, From the electric fields of charged subatomic particles, at least two charged interacting pieces.

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It is 2 KJ

It is because the formula is :

q=m∆Hf

where m is the mass and ∆Hf is the heat fusion.

So, we get:

q=80×25

q=2000J or 2 KJ

Answer:

397,570 g/m^3

Explanation:

The volume of the cylinder can be calculated using its height and diameter.

Mass of the soil sample (m) = 30 g

Height of the cylinder (h) = 6 cm

Diameter of the cylinder (d) = 4 cm

First, we need to calculate the radius (r) of the cylinder

Radius (r) = diameter / 2 = 4 cm / 2 = 2 cm = 0.02 m

Now, we can calculate the volume (V) of the cylinder

V = π * r^2 * h

V = 3.14159 * (0.02 m)^2 * 0.06 m

V = 7.5398 E-5 m^3

Calculate the bulk density (ρ) using this formula

ρ = m / V

ρ = 30 g / 7.5398 E-5 m^3

ρ = 397,887 g/m^3

Answer:

i do not know sorry i such at this hope you find the answer.

ratio = 1 : 1

the number of atoms can be 1: 1, 2:2, 3:3 etc

The experimental approach used to analyze the metal content in the precipitate of soap produced by reaction 1 was 0.1 M HCl(aq), then titrated with standard 0.1 M NaOH(aq) using an indicator.

Soap precipitate is a salt of a weak base. The addition of HCl produces free fatty acids, which can then be neutralized with NaOH. The difference between the number of moles of HCl and NaOH required to reach the endpoint gives the number of moles of RCO₂, which can then be used to calculate the mass and percent of the metal in the solid.

Complete questions:

Which experimental approach can be used to analyze the metal content of the soapy precipitate produced by Reaction 1?

M₂+(aq) + 2NaC₁₇H₃₂CO₂(aq) → 2Na+(aq) + M(C₁₇H₃₂CO₂)₂(s)

Dissolve the solid in a known volume of:

The true choice is D

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Answer:

2.5 moles ZnO

Explanation:

To find the amount of moles, you need to use a mole-to-mole ratio between ZnS and ZnO. The mole-to-mole is made up of the coefficients in the balanced equation.

4 ZnS + 6 O₂ -----> 4 ZnO + 4 SO₂

2.5 moles ZnS         4 moles ZnO
-----------------------  x  -----------------------  = 2.5 moles ZnO
                                  4 moles ZnS

**While the chemical equation is technically balanced, it does not exist in the smallest mole ratio as possible. Each coefficient can be divided by 2.**

2 ZnS + 3 O₂ -----> 2 ZnO + 2 SO₂

Tennessine (Ts)

Element #117

Discovered: April 5, 2010

Considering the ideal gas law, the correct answer is the third option: the volume of the gas at 323 K and 0.80 atm, if there are 0.75 moles of the gas is 25 L.

An ideal gas is called a hypothetical or theoretical gas, which would be composed of particles that move randomly and without interacting with each other.

The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:

P×V = n×R×T

Where:

Replacing in the ideal gas law:

0.80 atm×V = 0.75 moles×0.0821 (atmL)÷(molK)×323 K

Solving:

V = (0.75 moles×0.0821 (atmL)÷(molK)×323 K)÷ 0.80 atm

V= 25 L

Finally, the volume of the gas is 25 L.

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At 25 °C, the osmotic pressure of the homogeneous urea solution is 7.58 atm.

To calculate the osmotic pressure of a solution, we can use the formula:

π = MRT

Where:

π = Osmotic pressure (in pascals)

M = Molarity of the solution (in mol/L)

R = Ideal gas constant (8.314 J/(mol·K) or 0.0821 L·atm/(mol·K))

T = Temperature (in Kelvin)

First, we need to calculate the molarity (M) of the urea solution. The molarity is defined as moles of solute per liter of solution.

Given:

Mass of urea = 18.0 g

Molar mass of urea = 60.06 g/mol

Moles of urea = mass of urea / molar mass of urea

Moles of urea = 18.0 g / 60.06 g/mol

Now, we need to convert the temperature from degrees Celsius to Kelvin.

Given:

Temperature = 25 °C

Temperature in Kelvin = Temperature in Celsius + 273.15

Temperature in Kelvin = 25 + 273.15

Now, we can plug the values into the osmotic pressure formula and calculate the osmotic pressure.

M = moles of urea / volume of solution

Assuming the volume of solution is 1 liter, we have:

M = (18.0 g / 60.06 g/mol) / 1 L

T = temperature in Kelvin = 25 °C + 273.15 = 298.15 K

R = 0.0821 L·atm/(mol·K)

π = MRT

π = [(18.0 g / 60.06 g/mol) / 1 L] * (0.0821 L·atm/(mol·K)) * 298.15 K

Now we can calculate the osmotic pressure (π):

π = [(18.0 g / 60.06 g/mol) / 1 L] * (0.0821 L·atm/(mol·K)) * 298.15 K

Simplifying the equation:

π = (0.2996 mol/L) * (0.0821 L·atm/(mol·K)) * 298.15 K

Calculating:

π = 7.58 atm

Therefore, at 25 °C, the osmotic pressure of the homogeneous urea solution is 7.58 atm.

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Mass of nickel(ii) nitrate ni(no3)2 must be dissolved is 8.48 gram

It is given that

Volume of solution = 200 ml

Molarity of solution = 0.233 m

We have to find mass of nickel(ii) nitrate ni(no3)2

The concentration of a solute in a solvent (at a definite temperature and pressure condition) may be expressed using the unit molality (m) as per the type of the solution need to be produced. It is defined as the number of moles of the solute present in 1 kg of the solution.

Molarity = moles of solute/volume of solution

0.233 = Given mass/182 x 1000/200

0.233 = Given mass/182 x 5

Given mass = 0.233 x 182/5 = 8.48 gram

Hence, Mass of nickel(ii) nitrate ni(no3)2 must be dissolved is 8.48 gram

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The reaction between pottasium metal and chlorine gas is a combination reaction and it is as follows;

2K + Cl₂ → 2KCl

A chemical reaction is a process involving the breaking or making of interatomic bonds, in which one or more substances are changed into others.

A chemical reaction is said to be a combination reaction when two or more atoms are joined together to form a compound. An example is the reaction of pottasium metal and chlorine gas to produce pottasium chloride as follows:

2K + Cl₂ → 2KCl

In the above equation, two elements; pottasium chemically combines with chlorine to form a compound; pottasium chloride.

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The equation that represents a single replacement reaction given the various options is 2Al(s) + 6HCl -> 2AlCl₃(aq) + 3H₂O(g) (option 2)

A single replacement reaction, also known as single displacement reaction is a reaction in which elements higher in the electro-chemical series displace or replace elements lower in the electro-chemical series displace from a solution.

The following example illustrates single replacement reaction:

A + BC -> AC + B

From the above reaction, we can see that A has replace/displace B to from AC.

With the above information, we can determine the equation that represents single replacement reaction. Details below:

Equation from the questions:

From the above, we can see that only 2Al(s) + 6HCl -> 2AlCl₃(aq) + 3H₂O(g) conform to single replacement reaction.

Thus, the correct answer to the question is: 2Al(s) + 6HCl -> 2AlCl₃(aq) + 3H₂O(g) (option 2)

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Answer:

43.5 moles of HNO₃.

Explanation:

The balanced equation for the reaction is given below:

S + 6HNO₃ —> H₂SO₄ + 6NO₂ + 2H₂O

From the balanced equation above,

6 moles of HNO₃ reacted to produce 2 moles of H₂O.

Finally, we shall determine the number of mole of HNO₃ required to produce 14.5 moles of H₂O.

This can be obtained as illustrated below:

From the balanced equation above,

6 moles of HNO₃ reacted to produce 2 moles of H₂O.

Therefore, Xmol of HNO₃ will react to produce 14.5 moles of H₂O i.e

Xmol of HNO₃ = (6 × 14.5)/2

Xmol of HNO₃ = 43.5 moles

Therefore, 43.5 moles of HNO₃ is required to produce 14.5 moles of H₂O.

A substance made of two or more elements chemically combined in a set ratio is called a compound.

A compound is a substance that consists of two or more elements in a specific proportion and that has chemical and physical characteristics distinct from those of its constituent elements. For example, water (H2O) is a chemical compound composed of two hydrogen atoms and one oxygen atom in a ratio of 2:1. In a compound, the elements are chemically combined, meaning that they cannot be physically separated without breaking the chemical bonds between them.

                       The properties of a compound differ from those of its component elements since the atoms are rearranged when chemical bonds are formed. A substance made of two or more elements chemically combined in a set ratio is called a compound.

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Answer:

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

\(volume = \frac{mass}{density} \\\)

From the question

mass = 13 g

density = 19.3 g/cm³

We have

\(volume = \frac{13}{19.3} \\ = 0.673575...\)

We have the final answer as

Hope this helps you

\(0.1158 \10^{-3} times\) mol of NaOH  is needed to neutralise  36.1 ml of potassium hydroxide solution.

\(To\ determine\ the mass \ of {KHP}$ reaquired. \\we should first determine the number of moles of $\mathrm{NaOH}$ present is $3.21 \mathrm{~mL}$ of $36.1 \mathrm{M} \mathrm{MNaOH}$ solution.Moles of $\mathrm{NaOH}=$ molonity of $\mathrm{NaOH}$ $x$ solution of $\mathrm{NaOH}$ in $(\mathrm{L})$\)

\($$\begin{aligned}&=36.1\frac{\mathrm{mol}}{\mathrm{K}} \times \frac{3.21}{1000} \mathrm{~K} \\&=0.1158 \times 10^{-3} \mathrm{~mol} \text { of } \mathrm{NaOH}\end{aligned}$$\)

moles are the a standard scientific unit used to measure large quantities of very small entities such as atoms, molecules, or other defined particles.  A mole means a very large number of units, 6.0221076 × 1023.

The number of atoms or other particles in a mole is the same for all substances. A mole is related to the mass of an element as follows:

one mole of carbon-12 atoms is 6.0221076 × 1023 atoms and has a mass of 12 grams. By comparison, one mole of oxygen, by definition, consists of the same number of atoms as carbon-12, but has a mass of 15,999 grams. Therefore, the mass of oxygen is greater than the mass of carbon. This reasoning can also be applied to molecular weights or formula weights.

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Answer:

One

Explanation:

A unicellular organism consists of one cell.

hope this helps :)

There are 0.25 moles of CO₂ (g) in 11.0 grams of CO2 at STP.

Assuming the CO₂ gas in the cylinder is at STP, the total number of moles of gas is calculated as follows:

STP (standard temperature and pressure) is defined as 0°C (273.15 K) and 1 atmosphere (1 atm) of pressure. At STP, 1 mole of any ideal gas occupies a volume of 22.4 liters.

The molar mass of CO₂ is approximately 44.01 g/mol.

To determine the number of moles of CO2 in 11.0 grams at STP, we can use the following formula:

moles = mass / molar mass

Substituting the values we have:

moles = 11.0 g / 44.01 g/mol = 0.25 mol

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To balance the skeleton reaction under basic conditions:

NO2-(aq) + Al(s) ---> NH4+(aq) + AlO2-(aq)

We can follow these steps:

1. Balance the aluminum (Al) atoms:

NO2-(aq) + 2Al(s) ---> NH4+(aq) + AlO2-(aq)

2. Balance the nitrogen (N) atoms:

NO2-(aq) + 2Al(s) ---> NH4+(aq) + AlO2-(aq) + NO3-(aq)

3. Balance the oxygen (O) atoms:

NO2-(aq) + 2Al(s) ---> NH4+(aq) + AlO2-(aq) + NO3-(aq) + H2O(l)

Now, let's count the stoichiometric coefficients on the products side:

1 + 1 + 1 + 1 + 1 = 5 Therefore, the sum total of the stoichiometric coefficients on the products side is 5.

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Answer:

Zn. + 2 HCl ----------> ZnCl2. + H2

Explanation:

Mass of Zn in mole = 3.27/ 65.38= 0.050010.... mol

Mass of HCl in mole = 3.3/ 73= 0.044....mol

Hence, limiting reagent is HCl

Molar mass of ZnCl2= 136.38g

Let mass of ZnCl2 be x

x = 3.3*136.38÷ 73 = 6.165...

So, the mass of ZnCl2 is 6.17 g

when the temperature of an isolated system decreases while the surroundings of a non-isolated system gains heat.