please someone describe the graph of the cooling curve of water !!!!!!!!!!!!!!!! Please answer !!!!!!!!!! HELP

The mass of iron that remained at the end of the experiment : 6.65 g

Given

V HCl gas = 300 cm³

mass Fe = 7 g(Ar Fe = 56 g/mol)

Reaction

Fe(s) + 2HCl(g) → FeCl2(s) + H2(g)

Required

The mass of iron remained

Solution

molar volume for 1 mol gas = 24000 cm³=24 L, so mol HCl :

[tex]\tt \dfrac{300}{24000}=0.0125~mole[/tex]

mol ratio Fe : HCl from equation : 1 : 2, so mol Fe =

[tex]\tt \dfrac{1}{2}\times 0.0125=0.00625[/tex]

mass of Iron(reacted) :

[tex]\tt 0.00625\times 56=0.35~g[/tex]

Mass remained

7 g - 0.35 = 6.65 g

Answer:

They have similar chemical properties.

Explanation:

james madison test

The elements in a group on the periodic table have in common that they all are arranged on the basis of the number of electrons in the outer most shell of the atom.

The periodic table of  elements is defined as in which the classified all the non metals accordance with their properties in such a way that with similar properties are grouped.

Moosley arranged the elements in increasing order of their atomic number and observed that after a certain time of interval elements with same properties are repeated.

Therefore, elements in a group on the periodic table have in common that they all are arranged on the basis of the number of electrons in the outer most shell of the atom.

Learn more about periodic table, here:

https://brainly.com/question/11155928

#SPJ6

Answer:

d

Explanation:

Answer:

Exothermic reaction

Explanation:

Since in an exothermic reaction heat is released, the products will be more stable than the reactants.

Answer:

When atoms lose or gain electrons, they become positively or negatively charged ions. In an ionic compound, the ions are arranged in a three-dimensional structure called a crystal. ... When an atoms gains or loses electrons, it gains a charge, thus becoming an ion.

Explanation:

Answer:

The iron ore deposits began forming when the first organisms capable of photosynthesis began releasing oxygen into the waters.

Explanation:

Answer:

increase.

Explanation:

as you cross the period the atomic size decrease makes the atoms to have more affinity to the coming electrons.

Answer:

I believe it is 42.3 billion years old

Explanation:

Answer:

3)The nuclear charge of each successive atom increases, and the atomic radius decreases

Explanation:

As we move from left to right across the periodic table the number of valance electrons in an atom increase. The atomic size tend to decrease in same period of periodic table because the electrons are added with in the same shell. When the electron are added, at the same time protons are also added in the nucleus. The positive charge is going to increase and this charge is greater in effect than the charge of electrons. This effect lead to the greater nuclear attraction. The electrons are pull towards the nucleus and valance shell get closer to the nucleus. As a result of this greater nuclear attraction atomic radius decreases and ionization energy increases because it is very difficult to remove the electron from atom and more energy is required.

Answer:

The compound you are asking for is not complete. But I will give you the answer to one of the compounds.

The complete compound is:

2-bromo, 3-chloro-4,4-dimethylpentane.

Attached is the structure of the compound.

Explanation:

2-bromo, 3-chloro-4,4-dimethylpentane is an organic compound. It's molecular formula is C₇H₁₄BrCl.

This compound has bromine and chlorine attached to the backbone carbon of the pentane compound. The bromine and chlorine are attached to the second and third backbone carbon of the compound respectively.

Also, the dimethyl means that the compound has two methyl (CH₃) attached to the same carbon which is the number 4 backbone carbon.

Answer:

B: Hemoglobin

Explanation:

that's the answer

Answer:

B.Hemoglobin

Explanation:

Hemoglobin is the red color pigment that gives the color to your blood. Its found in the RBC's [Red Blood Cells]. Its main function is to bind completely with oxygen, due to the presence of iron in it, that helps it to get transported to various parts of the body according to its necessity through blood.

Explanation:

When liquid isopropanol (C3H8O) burns in oxygen gas, carbon dioxide gas and liquid water are produced. When dissolved sodium hydroxide reacts with sulfuric acid, aqueous sodium sulfate and water are formed.

Answer:

carbon dioxide and water

The products of the combustion of a hydrocarbon is carbon dioxide and water. Hence option B is correct.

Hydrocarbon is a compound to which hydrogen atoms are attached to carbon atoms. Those are the chief components of petroleum and natural gas. Methane, Ethane, Butane and Pentane etc. are the examples of the hydrocarbon. liquid petroleum gas which we use to cook food in our home is a butane gas which is hydrocarbon.

when hydrocarbon react it releases heat, and carbon dioxide and water as by products.

lets see such a reaction for an example.

when methane react with a oxygen, it gives water and releases carbon dioxide.

CH₄ + 2O₂ ======= CO₂ + 2H₂O

Hence combustion of hydrocarbon gives water and carbon dioxide, option B is correct.

To know more hydrocarbon click :

https://brainly.com/question/30907363

#SPJ7.

In the diagram of a transverse wave, P = 1 cycle per second, M represent  wavelength. Therefore, option A is correct.

A wave is considered to be transverse if its oscillations run counterclockwise to the wave's direction of advance. A longitudinal wave, on the other hand, moves in the direction of its oscillations. Transverse waves include water waves.

Due to the shear stress produced, transverse waves are frequently observed in elastic solids; in this situation, the oscillations are caused by the displacement of the solid particles from their relaxed state in directions perpendicular to the wave's propagation.

Trough: A transverse wave's lowest point. The distance separating one transverse wave's peak from the next is known as the wavelength. The distance from the wave's resting position to its crest is its amplitude.

Thus, option A is correct.

To learn more about transverse wave, follow the link;

https://brainly.com/question/23165088

#SPJ5

Answer:

A wave passes from a solid to a liquid while remaining the same temperature.

The medium increases in temperature while remaining in the same phase.

The medium decreases in temperature while remaining in the same phase.

A wave passes from a liquid to a gas while remaining the same temperature.

AND less electric charge would flow in the circuit

The voltage is decreased

Explanation:

PLEZZ MARK ME AS BRAINLYEST PLEZZ!!

Changing the battery in a circuit from 9 volts to 1.5 volts would most likely result in less electric charge flowing in the circuit.

According ohms law, the electric voltage is the product of current and resistance in the circuit. A lower voltage battery will have less electric potential energy available to move the charges, resulting in a lower electric current flow in the circuit.

The resistance in the circuit would not necessarily increase or decrease due to the change in the battery voltage. Resistance is a property of the components in the circuit, such as resistors, wires, and other devices that can impede the flow of current.

However, if the resistance of the circuit remains the same and the battery voltage decreases, the resulting electric current flow would also decrease according to Ohm's law (I = V/R), where I is the current, V is the voltage, and R is the resistance.

Find more on circuits:

https://brainly.com/question/27206933

#SPJ7

Answer:

Option D

Oxygen particles mix evenly with hydrogen particles.

Explanation:

Diffusion refers to the movement of gasses from a region of higher concentration to a region of lower concentration.

Diffusion occurs in gases because their particles are in a state of constant random motion.

Due to this continuous random motion, once the oxygen and the hydrogen are added to the container, they will begin to mix freely with each other until they fill up the entire volume of the container.

Answer:

Photosynthesis is the process in which light energy is converted to chemical energy in the form of sugars. In a process driven by light energy, glucose molecules (or other sugars) are constructed from water and carbon dioxide, and oxygen is released as a byproduct.

Explanation:

Answer:

Photosynthesis is the process in which light energy

Explanation:

Answer:

Synthesis

Explanation:

A+B=C

Answer:

1.301 × 10⁻¹² m

Explanation:

Step 1: Given and required data

Step 2: Calculate the wavelength (λ) of the electromagnetic wave

We can calculate the wavelength of the electromagnetic wave using the Planck-Einstein's relation.

E = h × c / λ

λ = h × c / E

λ = (6.626 × 10⁻³⁴ J . s) × (3.00 × 10⁸ m/s) / 1.528 × 10⁻¹³ J

λ = 1.301 × 10⁻¹² m

The wavelength of this wave is equal to: D. [tex]1.301 \times 10^{-12}\;meter[/tex]

Given the following data:

To determine the wavelength of this wave, we would apply Einstein's equation for photon energy:

Mathematically, Einstein's equation for photon energy is given by the formula:

[tex]E=\frac{hc}{\lambda}[/tex]

Where:

Making [tex]\lambda[/tex] the subject of formula, we have:

[tex]\lambda = \frac{hc}{E}[/tex]

Substituting the given parameters into the formula, we have;

[tex]\lambda = \frac{6.626 \times 10^{-34}\; \times \;3.0 \times 10^{8}}{1.528 \times 10^{-13} }\\\\\lambda = \frac{1.99 \times 10^{-25}}{1.528 \times 10^{-13} }\\\\\lambda =1.301 \times 10^{-12}\;meter[/tex]

Read more: https://brainly.com/question/9655595

Answer:

I think it will start to have a greenish color and get lighter

Explanation:

Answer:

Differentiated below

Explanation:

- Stream load is defined as the quantity of solid matter that's carried by the erosion of the stream.

- Stream discharge is defined as the quantity (which is volume) of water that passes a given point for a particular amount of time.

- Stream Gradient is defined as the slope of the stream. This is basically expressed as:

Stream gradient = Change in elevation between two points on a stream ÷ actual distance between the two points where water actually flows.

Answer:0.21 seconds

Explanation:

Just because it is and how science works

Answer:

0.21 seconds, please let me know if I am wrong

Answer:

Ca2+ is larger than Mg2+

Explanation:

Mg2+ has total 10 electrons and Ca2+ has total 18 electrons. So, Ca2+ will have more no of subshell which means greater particle size.

The average speed

3. 89.7 m/min

4. 6.13 ft/min

Given

3. 1076 m in 12 min

4. 92 ft in 15 min

Required

average speed

Solution

3.

I am solving for : the average speed

The equation I need is :

[tex]\tt avg~speed=\dfrac{total~distance}{total~time}[/tex]

This is how I set the equation

[tex]\tt avg~speed=\dfrac{1076~m}{12~min}[/tex]

This is my answer = 89.7 m/min

4.

I am solving for : the average speed

The equation I need is :

[tex]\tt avg~speed=\dfrac{total~distance}{total~time}[/tex]

This is how I set the equation

[tex]\tt avg~speed=\dfrac{92~ft}{15~min}[/tex]

This is my answer = 6.13 ft/min

Answer:

From the periodic table, Atomic number of fluorine is 7 and atomic mass is 19

Answer:

negative and positive i think

Explanation:

Hello, It's me Moriah Elizabeth!

Answer:

When the number of electrons does not equal the number of protons, the atom is ionized.

Answer:

C Q, R and S only.

Thermometer: for measuring temperature.

Measuring cylinder: for measuring accurate volume used in standardization during determination of concentration.

dock: for holding solutions

Answer:

1.28 mol Cu(OH)₂

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

125 g Cu(OH)₂

Step 2: Identify Conversions

Molar Mass of Cu - 63.55 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of H - 1.01 g/mol

Molar Mass of Cu(OH)₂ - 63.55 + 2(16.00) + 2(1.01) = 97.57 g/mol

Step 3: Convert

[tex]125 \ g \ Cu(OH)_2(\frac{1 \ mol \ Cu(OH)_2}{97.57 \ g \ Cu(OH)_2} )[/tex] = 1.28113 mol Cu(OH)₂

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

1.28113 mol Cu(OH)₂ ≈ 1.28 mol Cu(OH)₂