A famous scientist has a hypothesis that is different from the current scientific theory. What should happen to the scientist hypothesis?

Answer:

1. Convert the mass of A to moles dividing in molar mass

2. Convert the moles of A to moles of D (2mol A = 3mol D)

3. Convert the moles of D to mass multiplying by its molar mass

Explanation:

As you can see in the equation, 2moles of A produce 3 moles of D, the equation is:

2mol A = 3mol D

But in the problem you are having the mass of A and you need the mass of D. That means you require to convert the mass of A to moles. With the moles of A you can find the moles of D and, as last, you need to convert the moles of A to mass.

To convert mass to moles or vice versa you must use Molar Mass. That means, the answer is:

Answer:

Pretty sure it is C

Explanation:

Due to the fact that It is talking about biotic survival

Answer:

I think part C

Because u are talking about the survivability

The balanced chemical equation for this question is \(Cl_{2} + 2KBr \rightarrow 2KCl + Br_{2}\).

A balanced chemical equation occurs when the number of the atoms involved in the reactants side is equal to the number of atoms in the products side. Chemical equations are balanced using coefficients. A chemical symbol or formula is preceded by a coefficient, which is a number. It reveals how many of the substance's atoms or molecules took part in the process. Two molecules of water would be expressed as 2 H2O and two molecules of hydrogen as 2 H2, respectively.

The amount of bromine is calculated as follows:

\(11.0 g KBr* (1mol KBr/119.002g KBr )* (1mol Br2/2mol KBr) *( 159.808g Br_{2}/1mol Br_{2} )= 7.39 g Br_{2}.\)

So, 7.39 g of bromine is calculated which is the answer.

Ans- 7.39g

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Ionization of beryllium (Be) produces a +2 charge. Be now has a net positive charge of +2 after losing two electrons and gaining two fewer negative charges in its ionized state.

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Answer:

When one object uses force to move the other.

Explanation:

This is called Thrust.Thrust is used in airplane engines,or an engine can be  a source of Thrust,we use our legs to Thrust us forward when we walk!

Sir Isaac Newton's third law explains that for every action, or force, in nature, there is an equal and opposite reaction.

Hope that helps!

There are 165600 coulombs passed through the solution if 11. 5 A of current was applied for 4. 00 h.

Calculation,

Formula used :

Q = It

Where Q = charge passing through the solution = ?

I = current passed through the solution =  11. 5 A

and ,  t = time = 4. 00 h

Putting the value of current , and  time

Q = 11. 5×4. 00 h =11. 5× 46×3600 A×s = 165600 coulombs

The SI unit of charge is coulombs.

The SI unit of current is ampere.

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Answer:

The color of the solution turned a clear brown sort of a copper color

Explanation:

The color of the solution turned a clear brown sort of a copper color.

This is because ASA and the FeCl3 are reacting in a manner that it is resulting in the creation of a metal.

Hi

In the modern periodic table, the elements are arranged in the order of their increasing atomic number. In the modern periodic table, there are seven horizontal rows called periods and eighteen vertical columns (1 to 18) called groups. The arrangement of the periods and groups results in formation of boxes.

Explanation:

If it's help pls give me Brainliest!!

The equilibrium constant expression for the reaction Cu(s) + 2Ag+(aq) → Cu2+(aq) + 2Ag(s) is [Cu2+(aq)]/[Ag+]^2, rounded to two significant digits.

The equilibrium constant (K) is a quantitative measure of the extent to which a reaction has reached equilibrium. It is determined by the concentrations of the reactants and products at equilibrium. In this reaction, the equilibrium constant expression can be derived from the balanced chemical equation. The brackets indicate the concentration of the species in the reaction.

According to the stoichiometry of the balanced equation, the concentration of Cu2+(aq) in the numerator is divided by the concentration of Ag+ ions raised to the power of 2 in the denominator. This is because the coefficients of Cu2+ and Ag+ in the balanced equation are 1 and 2, respectively. By using the concentrations of Cu2+ and Ag+ at equilibrium, the equilibrium constant can be calculated, providing a quantitative measure of the position of the equilibrium. Rounding the equilibrium constant to two significant digits ensures a reasonable level of precision for the value.

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Approximately 12.45 grams of solid silver chromate will precipitate when 150 mL of 0.500 M silver nitrate solution is added to excess potassium chromate.

To determine the number of moles of AgNO3 present in 150 mL of a 0.500 M AgNO3 solution, we can use the formula:

moles = concentration × volume

Given:

Concentration of AgNO3 solution = 0.500 M

Volume of AgNO3 solution = 150 mL

First, we need to convert the volume from milliliters (mL) to liters (L) since the concentration is given in moles per liter (M).

1 L = 1000 mL

Therefore, the volume of the AgNO3 solution in liters is:

150 mL × (1 L / 1000 mL) = 0.150 L

Now we can calculate the moles of AgNO3 using the formula:

moles = concentration × volume

moles = 0.500 M × 0.150 L

moles = 0.075 mol

So, there are 0.075 moles of AgNO3 present in 150 mL of the 0.500 M AgNO3 solution.

Now, let's proceed to determine how many grams of solid silver chromate (Ag2CrO4) will precipitate when the AgNO3 solution reacts with excess potassium chromate (K2CrO4).

From the balanced chemical equation:

2AgNO3(aq) + K2CrO4(aq) → Ag2CrO4(s) + 2KNO3(aq)

We can see that the molar ratio between AgNO3 and Ag2CrO4 is 2:1. Therefore, for every 2 moles of AgNO3, we will form 1 mole of Ag2CrO4.

Since we have 0.075 moles of AgNO3, we can calculate the moles of Ag2CrO4 formed:

moles of Ag2CrO4 = 0.075 mol / 2 = 0.0375 mol

To determine the mass of Ag2CrO4, we need to multiply the moles by its molar mass. The molar mass of Ag2CrO4 is calculated by summing the atomic masses of each element in the compound:

Ag2CrO4 = 2(Ag) + 1(Cr) + 4(O) = 2(107.87 g/mol) + 1(52.00 g/mol) + 4(16.00 g/mol) = 331.87 g/mol

mass of Ag2CrO4 = moles of Ag2CrO4 × molar mass of Ag2CrO4

mass of Ag2CrO4 = 0.0375 mol × 331.87 g/mol = 12.45 g

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Answer:It’s C on edge 2020

(Combustion of car engines producing pollutants in the air)

Explanation:

I got it right :))

The negative impact of chemistry is the development of Teflon which is the nonstick material used in cookware.

About Teflon:

So creates a very negative impact of chemistry on society.

The following points can be considered:

Therefore, the correct answer is the development of Teflon the nonstick material used in cookware.

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Answer:

Gas - Steam

Solid - Rock

Liquid - Juice

Answer:

Solid: Ice

Liquid: Water

Gas: Steam or Water vapor

Explanation:

This is a common example to answer your question. Some other examples are:

-most metals(ex: iron, tin, copper, gold) These are solids

-milk, juice, hot chocalate, any soda drink These are liquids

-hydrogen, helium, carbon dioxide, oxygen These are gases

Hope this helps!

Answer:

3.6 moles of sodium bicarbonate were decomposed.  

Explanation:

The decomposition of sodium bicarbonate (NaHCO₃) to form sodium carbonate (Na₂CO₃), water, and carbon dioxide gas can be represented by the following balanced chemical equation:

\(\displaystyle 2\text{NaHCO$_3$}_\text{(s)} \longrightarrow \text{Na$_2$CO$_3$} + \text{H$_2$O}_\text{($\ell$)} + \text{CO$_2$}_{\text{(g)}}\)

We want to determine the amount of sodium bicarbonate decomposed when 1.8 moles of carbon dioxde is produced.

From the equation, we can see that the mole ratio between carbon dioxide and sodium bicarbonate is 1:2. That is, there is one mole of carbon dioxide produced for every two moles of sodium bicarbonate.

Therefore:

\(\displaystyle 1.8\text{ mol CO$_2$} \cdot \frac{2\text{ mol NaHCO$_3$}}{1\text{ mol CO$_2$}} = 3.6\text{ NaHCO$_3$}\)

In conclusion, 3.6 moles of sodium bicarbonate were decomposed.  

If the atom in Drawing B had been removed by physical separation from one of the substances in Model 1, the substance that could have been the source of the atom in Drawing B is an element.

An atom is the smallest part of a substance that can take part in a chemical reaction. We know that elements are composed of atoms. The atoms of an element are discretely arranged. Thus, in an element, there are so many atoms of the substance.

In the image that has been shown in the question, the source of the atom as it has been show is an element. Thus, if the atom in Drawing B had been removed by physical separation from one of the substances in Model 1, the substance that could have been the source of the atom in Drawing B is an element.

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An atom X that has 12 protons and 12 electrons, loses 2 electrons to form an ions,  the charge of ion will be X⁺² the number of protons 12 and electrons in the ions is 10.

An atom X has 12 protons and 12 electrons that means X is a neutral atom and the atomic no. is 12 because total no. of protons is equal to atomic number. When it looses the 2 electrons then atom becomes positively charged ion . the charge on the ion is +2.

now, the no. of protons will be = 12

number of electrons will be = 12 - 2 = 10

Thus, An atom X that has 12 protons and 12 electrons, loses 2 electrons to form an ions,  the charge of ion will be X⁺² the number of protons 12 and electrons in the ions is 10.

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This diagrammatic representation is called an organizational chart or an organogram.

Organizational charts use boxes or rectangles to represent positions or departments within a firm, and lines or arrows to connect them, indicating the reporting relationships and hierarchy within the organization.   Organizational charts can vary in complexity depending on the size and structure of the firm. They provide a visual representation of the reporting relationships and help individuals understand the hierarchy and structure of the organization.

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The pressure of A 5.15L balloon has a pressure of 1.35 atm. If compressed to 3.43L is 2.03 atm and volume of 0.785 moles of N₂ fill a balloon at 1.5 atm and 301 K is 19.4 L.

According to the equation of ideal gas

\(P_{1} V_{1} =P_{2} V_{2}\)

Substituting the value in the above equation,

\(1.35*5.15=P_{2} *3.43\)

\(P_{2} =\frac{1.35*5.15}{3.43}\)

\(P_{2}\)= 2.03 atm

According to ideal gas equation

PV=nRT

Substituting value in above equation

\(V= \frac{nRT}{P}\)

\(V= \frac{0.785*0.0821*301}{1.5}\)

V= 19.4 L

The equation of state of an ideal gas, often known as the general gas equation, is the ideal gas law. Even though it has a number of restrictions, it is a good approximation of the behavior of various gases under a variety of situations.

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Answer:

Winter

Explanation:

I dont know but whatev

Answer:

Winter

Explanation:

The seasonal cycle in the polar and temperate zones of one hemisphere is opposite to that of the other. Therefore, When it is summer in the Northern Hemisphere, it is winter in the Southern, and vice versa.

hope it helps :)

It is D

SPIRAL............

Answer:

Spiral

Explanation:

I searched up each one and the spiral was the exact picture of that. The irregular galaxy doesn't really have a shape to it. The elliptical galaxy is more smooth and less defined. As in you can't really see as many stars. And the barred galaxy is more oval shaped, kind of like an eye.

1) Resting potential is generated mainly by the outward movement of K+ ions from inside the cell. (True)

2) The voltage changes shown in the figure are measured just across the plasma membrane (True)

3) The changes in voltage seen at #2 and #4 in the figure are caused by similar movements, in the same direction, of the same types of ions across the membranes.(false)

4) The trace in the figure is following the voltage change as it moves down the axon. (false)

5) The voltage change shown in the figure is an all-or-nothing response. (True)

Electric Voltage is the amount of energy needed to move a unit of electric charge from one place to another. The electric voltage expressed in volts is also often referred to as the electric potential difference because basically the electric voltage is a measure of the potential difference between two points in an electric circuit.

An object is said to have a higher electric potential than other objects because the object has a greater amount of positive charge than the number of positive charges on other objects. While what is meant by electric potential itself is the amount of charge contained in an object.

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Answer:

The new concentration of the solution is;

0.01 M

Explanation:

The question relates to concentration of solution and proportion of mixtures

The given parameters are;

The volume of water added to the 0.1 M solution = 900 mL

The initial volume of the solution to which water was added = 100 mL

Therefore, the total final volume of the solution = 100 mL + 900 mL = 1000 mL = 1 L

The concentration of the solution = 0.1 M

The number of moles present in the solution, 'n', is given as follows;

n = 100 mL/(1000 mL) × 0.1 M = 0.01 moles

Given that no more concentrated solution was added, we have;

The number of moles in the 100 mL solution   = The number of moles in the 1,000 mL solution

Therefore, the number of moles in the 1,000 mL (1 L) solution = 0.01 moles

Therefore;

The new concentration of the 1,000 mL (1 L) solution = 0.01 moles/(1,000 mL) = 0.01 moles/(1 L) = 0.01 M (By definition of the molarity of a solution)

The new concentration of the 1,000 mL (1 L) solution = 0.01 M.

D. 0.01 M

Given:

The volume of water added to the 0.1 M solution = 900 mL

The initial volume of the solution to which water was added = 100 mL

So,

The total final volume of the solution = 100 mL + 900 mL = 1000 mL = 1 L

The concentration of the solution = 0.1 M

Firstly we need to find the number of moles which is represented by 'n':

 \(n = \frac{100mL}{1000mL}* 0.1 M\\\\n = 0.01 \text{moles}\)

 The number of moles in the 100 mL solution   = The number of moles in the 1,000 mL solution

Thus,

The number of moles in the 1,000 mL (1 L) solution = 0.01 moles  

For calculation of new concentration:

Using Molarity formula:

The new concentration of the 1,000 mL (1 L) solution \(= \frac{0.01\text{ moles}}{1000mL} = \frac{0.01\text{ moles}}{1L} = 0.01 M\)

The new concentration of the 1,000 mL (1 L) solution = 0.01 M.

Thus, the correct option is D.

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The equations for the following acid-base reactions are

a. H₂CO₃ + Sr(OH)₂ → SrCO₃ + 2H₂O

b. HClO₄ + NaOH → NaClO₄ + H₂O

c. HBr + Ba(OH)₂ → BaBr₂ + 2H₂O

d. NaHCO₃ + H₂SO₄ → Na₂SO₄ + 2H₂O + CO₂

An acid–base reaction is a type of chemical reaction that involves the exchange of one or more hydrogen ions, H⁺, between species that may be neutral (molecules, such as water, H₂O) or electrically charged (ions, such as ammonium, NH₄⁺; hydroxide, OH⁻; or carbonate, CO₃²⁻).

Your question is incomplete but most probably your question was

Complete and balance the equations for the following acid-base reactions:

a. H2CO3 + Sr(OH)2 → ...
b. HClO4 + NaOH → ...
c. HBr + Ba(OH)2 → ...
d. NaHCO3 + H2SO4 → ...

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Answer:

Cu

Explanation:

.............................

Answer:

A frog heart has three chambers.two atrium and one ventricle is answer

Explanation:

I hope it's helpful!

Explanation:

Second answer is the correct one.

Answer:

D

Explanation:

I just took the quiz on a pex

The electrode is the anode in a galvanic cell should be option d. The electrode with the highest oxidation potential.

The electrode should be lies in the left half-cell to represent the anode since oxidation should be arise here.

Here the flow of anions should be in the salt that bridges towards it. In the right half-cell that represent the cathode since the reduction arise here.

Hence, the option d is correct.

And the rest of the options are wrong.

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