sing Chemical Formulas to Find Number of A
Consider the chemical formula for calcium chlorate: Ca(CIO3)2
How many of each of these atoms is in a molecule of calcium chlorate?
Ca:
CI:
O:

Answer:

ph2h2o

Explanation:

not quite sure explain

Answer:

true

because with the both states we increase the surface of reaction

4. Aluminum chloride has the largest slope because on dissociation it produces 4 ions. therefore, it has highest conductivity.

Aluminum chloride (AlCl3) is an ionic compound that dissociates in water to produce Al3+ and Cl- ions. Since each AlCl3 molecule dissociates into three ions, the total number of ions produced is four (Al3+ and three Cl- ions).

When dissolved in water, these ions become mobile and can conduct electricity. The higher the number of ions produced by a compound, the greater its conductivity. Therefore, aluminum chloride has the largest slope because it produces four ions upon dissociation, making it a highly conductive compound.

on the contrary ,sodium chloride only producers 2 Ions,  that is one Sodium and one chloride ion. therefore,  it has least conductivity and therefore the smallest slope.

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Answer:

When all the hydrogen is converted to helium the Star rearranges itself, its core shrinks and its outer layers expand, depending on its initial mass the Star then transforms into a giant or a super-giant

Explanation:

The balloon will be filled by a gas, and as the gas is not escaping we can assume that it is at a constant pressure.

The KMT (Kinetic Molecular Theory) explains the macroscopic properties of gases. This theory states that gases are formed by particles in constant motion, and that their kinetic energy is directly proportional to the temperature of the gas.

If we leave the balloon filled with gas in the sun we assume that the temperature of the gas inside will start to rise. When the temperature starst to rise, and the pressure is constant, particles will gain kinetic energy. This will result in particles moving faster and coliding with each other and with the balloon's walls more often. As a consecuence the particles will tend to stay farther from one another and the volume of the balloon will increase.

This is an example of Charles's Law that states that at constant pressure the volume of a gas is directly proportional to its temperature. In other words, when the temperature of the gas increases the volume increases as well.

To summarize, if we fill a balloon and we leave it in the sun its volume will increase.

Complete Question

Sodium carbonate, Na2CO3(s), can be prepared by heating sodium bicarbonate, NaHCO3(s).

2NaHCO3(s) ------> Na2CO3(s) + CO2(g) + H2O(g) Kp = 0.23 at 100oC

If a sample of NaHCO3 is placed in an evacuated flask and allowed to achieve equilibrium at 100oC, what will the total gas pressure be?

Answer:

The value is  \(P_T  = 0.959 \  atm \)

Explanation:

From the question we are told that

   The equation is  

\(2NaHCO_3_{(s)} \rightarrow  Na_2CO_3_{(s)} + CO2_{(g)} + H2O_{(g)}\)

Generally the equilibrium partial pressure is mathematically represented as

    \(K_p =  P_{CO_2} + P_{H_2O}\)

Here  

   \( P_{CO_2} \ and  \  P_{H_2O}\) are partial  pressures of  \( CO_2 \ and  \ H_2O \) gases

Note: when writing the formula for equilibrium partial pressure we consider only the gas in the reaction

Let assume that    

    \(P_{CO_2} =  a\)

Generally  \(P_{CO_2} = P_{H_2O}\) since they are both products of the reaction

  So  

       \(K_p =  a^2 \)

From the question we are told that \(K_p =  0.23 \)

So  

     \( 0.23=  a^2 \)

=>  \( a = \sqrt{0.23} \)

=>  \( a = \sqrt{0.23} \)

=>  \( a = 0.4796  \ atm \)

So

     \(P_{CO_2} =  0.4796  \ atm\)

and

      \(P_{H_2O} =  0.4796  \ atm \)

So the total pressure is

      \(P_T  =  0.4796  +  0.4796\)

=>   \(P_T  = 0.959 \  atm \)

The quotient of the given mathematical problem is equal to 2. Therefore, option A is correct.

In arithmetic, a quotient can be described as a quantity produced by the division of two numbers. The quotient has used throughout mathematics and is referred to as the integer part of a division or as a fraction or a ratio.

A rational number is the quotient of two integers when the denominator is non-zero.

A real number r is rational, it can be expressed as a quotient of two integers with a non-zero denominator.

Given a real number r, r is rational if and only if there exist integers a and b such that\({\displaystyle r={\tfrac {a}{b}}}, {\displaystyle b\neq 0}\)

Given, the division of √100/√25

We can write the \(\sqrt{100} =\sqrt{25\times 4} =\sqrt{25} \sqrt{4}\)

Now, \(\displaystyle \frac{\sqrt{100}}{\sqrt{25}}= \frac {\sqrt{25}\times \sqrt{4} }{ \sqrt{25}} =\sqrt{4} =2\)

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a) In the reaction \(H_2CO_3 + CN^- = HCN + HCO^{3-}\), \(H_2CO_3\) acts as an acid by donating a proton (\(H^+\)) to \(CN^-\).

b) In the reaction \(F^- + HSO_4^{-} = HF + SO_4^{2-}\), \(HSO_4^{-}\) acts as an acid by donating a proton (\(H^+\)) to \(F^-\).

c) In the reaction \(HSO_4^- + H_2O = H_3O^+ + SO_4^{2-\), \(HSO_4^{-}\) acts as an acid by donating a proton (\(H^+\)) to \(H_2O\).

a) The acid is both an Arrhenius acid (produces \(H^+\) ions in water) and a Bronsted-Lowry acid (donates a proton to a base).

b) The acid is both an Arrhenius acid (produces \(H^+\) ions in water) and a Bronsted-Lowry acid (donates a proton to a base).

c) The acid is a Bronsted-Lowry acid (donates a proton to a base) but not an Arrhenius acid because it does not produce \(H^+\) ions in water. However, the \(H_3O^+\) ion that is formed can be considered an Arrhenius acid because it produces \(H^+\) ions in water.

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22202 are the number of atoms to be placed side by side to span a distance of 6.0um.

The smallest unit of substance into which it is possible to divide without releasing electrically charged particles is the atom.

In addition, it is the smallest unit of matter with chemical element-like characteristics. The atom is thus the fundamental component of chemistry.

An atom of Rhodium (Rh) diameter d = 2.7x\(10^{-10}\) m.

Now assuming that keeping n atoms side by side , the distance will be L= 6um = 6.5 x \(10^{-6}\) m.

Now, the total length is given by total sum of diameter,

so the equation is given by,

L= nd

n= \(\frac{L}{d}\)

n= \(\frac{6.0x 10^{-6} m}{2.7x10^{10} } m\)

n= 22202 atoms.

Hence, there are total 22202 Rh atoms have to be placed side by side to span a distance.

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Answer:

The answer is ligament

Explanation:

Hope that helps!

The least massive particle is the electron. Hence, the option true is correct.

Sub-atomic particles are tiny particles of matter that together constitute an atom. There are three subatomic particles, which are namely electrons, protons and neutrons.

Protons and neutrons have approximately the same mass, but they are both much more massive than electrons (approximately 2,000 times as massive as an electron).

Hence, the option true is correct.

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Answer:

false

Explanation:

The redox reactions is balanced as by adding coefficients as follows:2 H+ +ClO²⁻+I⁻⟶2 Cl⁻+H₂O+I₂.

Redox reactions comprise of two parts a reduced part and an oxidized part, which occur simultaneously . The part which is reduced gain electrons and hence there is a increase in oxidation state of the species.

While, the part which is oxidized looses electrons and hence there is a decrease in oxidation state of the species.During redox reactions, there is no net change in the number of electrons . Electrons which are given off in oxidation are used up in reduction.These too are balanced by adding coefficients.

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The gas law that is calculated with the pressure and volume variables at a constant temperature is Boyle's Law. Boyle's Law states that the pressure (P) of a gas is inversely proportional to its volume (V) when temperature (T) is held constant.

Mathematically, it is expressed as P₁V₁ = P₂V₂, where P₁ and V₁ represent the initial pressure and volume, and P₂ and V₂ represent the final pressure and volume.According to Boyle's Law, if the volume of a gas is reduced while keeping the temperature constant, the pressure will increase proportionally.

Similarly, if the volume is increased, the pressure will decrease. This relationship holds as long as the temperature remains constant throughout the process. Boyle's Law is one of the fundamental gas laws and provides insights into the behavior of gases under changing pressure and volume conditions at a constant temperature.

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Answer:

C) Generally speaking, non-metallic elements have less effective nuclear charge (Zeff) than metallic elements in the same period

Explanation:

Let us remember that metals are found towards the left hand side of the periodic table while nonmetals are found towards the right hand side of the periodic table.

The magnitude of effective nuclear charge increases from left to right in the periodic table as the size of the nuclear charge increases without a corresponding increase in the number of shells. This implies that as one moves from metals to nonmetals, there is a significant increase in the magnitude of effective nuclear charge which simultaneously leads to an increase in ionization energy across the period.

Therefore, it is a false statement that; 'Generally speaking, non-metallic elements have less effective nuclear charge (Zeff) than metallic elements in the same period'.

The statement that can be regarded as false is : C) Generally speaking, non-metallic elements have less effective nuclear charge (Zeff) than metallic.

Therefore, Periodic table has its arrangements in periods and group.

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The power sector is targeted for the application of hydrogen fuel cells.

This type of fuel produces electricity through the combination of hydrogen and oxygen atoms. The hydrogen reacts with oxygen across an electrochemical cell and produces electricity, water, and heat in a very small quantity.

Hydrogen-powered fuel cell electric vehicles doesn't have any carbon emission or greenhouse gases such as carbon dioxide etc which depletes the ozone layer and causes global warming.

It emit none of these harmful substance and only emits water and warm air which makes it a very clean fuel thereby causing a reduction in pollution and reducing the risk of respiratory diseases.

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Answer: For the equilibrium that exists in an aqueous solution of nitrous acid (HNO2, a weak acid), the equilibrium constant expression is K = [ H+] [NO2-] / [HNO2].

Explanation:

An expression that depicts the ratio of products and reactants raised to the power of their coefficients at equilibrium is called equilibrium constant.

An equilibrium constant is denoted by the symbol 'K'.

For example, the dissociation of nitrous acid in aqueous solution is as follows.

\(HNO_{2} \rightleftharpoons H^{+} + NO^{-}_{2}\)

Hence, its expression for equilibrium constant is as follows.

\(K = \frac{[H^{+}][NO^{-}_{2}]}{[HNO_{2}]}\)

Thus, we can conclude that for the equilibrium that exists in an aqueous solution of nitrous acid (HNO2, a weak acid), the equilibrium constant expression is K = [ H+] [NO2-] / [HNO2].

Answer:

It determines the stability electric state of the atom

Explanation:

Now atoms are stable depending on the number of neutrons they have in their nuclei. If the no of electrons Equal no of protons then the atom is said to be neutral

bear in mind that neutrons have no charge so they don't affect the atom's electric state.

it's the neutrons that determines the atom's radioactive state

Thus, the heat of fusion of water is 79.9 cal/g. If a 5 g piece of ice melts in 100 g of water at 30.0 °C in an insulated bottle, the final temperature of the water is 35071 °C.

Heat of fusion is defined as the amount of heat required to turn 1g of solid into a liquid without causing a temperature change. The term "heat of fusion" refers to the energy needed to melt a specific quantity of a solid at its melting point temperature.

To calculate final temperature

\(\rm q = mc \Delta\ T\)

Δ T = T(initial) - T(final)

T(final)= m × c × q - T(initial)

T(final)= 79.9 x 4.184 x 105 - 30.0

T(final)= 35071.6 °C

Thus, the heat of fusion of water is 79.9 cal/g. If a 5 g piece of ice melts in 100 g of water at 30.0 °C in an insulated bottle, the final temperature of the water is 35071 °C.

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Answer:

Bromic Acid

Explanation:

Answer: C is the correct answer

The balanced molecular equation for the reaction between sodium hydroxide (NaOH) and aluminum chloride (\(AlCl_3\)) in aqueous solution can be written as follows: 2NaOH(aq) + 3\(AlCl_3\)(aq) → 3NaCl(aq) + \(Al(OH)_3\)(s)

In this reaction, sodium hydroxide (NaOH) reacts with aluminum chloride (\(AlCl_3\)) to form sodium chloride (NaCl) and aluminum hydroxide (\(Al(OH)_3\)). The coefficients in the balanced equation indicate the stoichiometric ratio between the reactants and products.

The physical states of the substances are indicated by the symbols (aq) for aqueous solutions and (s) for the solid precipitate.

The reaction is a double-displacement reaction, also known as a precipitation reaction. Double-displacement reactions involve the exchange of ions between two compounds, resulting in the formation of a precipitate.

In this case, sodium hydroxide and aluminum chloride react to form sodium chloride and aluminum hydroxide, with aluminum hydroxide being the white solid precipitate.

It's worth noting that the actual reaction might involve hydrated forms of the compounds, such as NaOH·x\(H_2O\) and \(AlCl_3\)·y\(H_2O\). However, for simplicity, these hydrated forms are not included in the balanced equation.

Overall, the balanced equation represents the chemical reaction between sodium hydroxide and aluminum chloride, showing the reactants, products, and their stoichiometric ratios.

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Answer:

1.  A

2. G

3. B

4. F

5. C

6. E

7. D

Hope this helps please mark me brainliest!

God bless!

Answer:

1.  A

2. G

3. B

4. F

5. C

6. E

7. D

Answer:

0.5mol

Explanation

Please mark answer as brainliest

Answer:

Molarity = 12 M

Explanation:

Given data:

Molarity of solution = ?

Number of moles of NaCl = 3.0 mol

Volume of solution = 250 mL (250/1000 = 0.25 L)

Solution:

Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.

Formula:

Molarity = number of moles of solute / L of solution

Molarity = 3.0 mol / 0.25 L

Molarity = 12 M

Answer:

\(\boxed {\boxed {\sf 12 \ M \ NaCl}}\)

Explanation:

Molarity, which tells us the concentration of a solution, is found by dividing the moles of solute by the liters of solution.

\(M=\frac{moles \ of \ solute}{liters \ of \ solution}\)

1. Define Values

There are 3.0 Moles of NaCl. This is the moles of solute.

There are 250 milliliters of solution, but we need the liters.

    a. Convert mL to L

1 milliliter is equal to 0.001 liters. We can multiply the given number of              milliliters (250) by 0.001.

250 mL * 0.001 L/mL= 0.25 L

\(moles \ of \ solute = 3.0 \ mol \ NaCl \\liters \ of \ solution= 0.25 \ L\)

2. Calculate Molarity

Substitute the values into the formula.

\(M=\frac{3.0 \ mol \ NaCl}{0.25 \ L}\)

Divide.

\(M= 12 \ mol \ NaCl/L\)

3. Define Units

1 mole per liter is equal to 1 molar.

Our answer of 12 mol NaCl/ L is equal to 12 M NaCl

The molarity is 12 M NaCl

Answer:

I think It Is C

Explanation:

Im really sry if i am wrong

Answer:

One way to find out is to change “passive mass” - the dirt and rocks of Earth - and convert it into “active mass” - add energy “E” to it. If we increase the energy “E” we will increase its mass. The key is, how do you turn “passive mass” into “active mass” by adding energy “E” to the “passive mass”? After all, isn’t “passive mass” of the Earth just the dirt and rocks that make up the planet?

Explanation:

Answer:

V =  11.51 L

Explanation:

Given data:

Volume of oxygen gas produced = ?

Pressure = 0.820 atm

Temperature = 153°C (153+273 = 426K)

Mass of KClO₃ = 22.4 g

Solution:

Chemical equation:

2KClO₃    →         2KCl  + 3 O₂

Number of moles of KClO₃:

Number of moles = mass/molar mass

Number of moles =  22.4 g/  122.5 g/mol

Number of moles = 0.18 mol

now we will compare the moles of KClO₃  and O₂

                       KClO₃           :              O₂

                           2               :               3

                         0.18             :             3/2×0.18 = 0.27

Volume of oxygen:

PV = nRT

R = general gas constant (0.0821 atm.L/mol.K)

0.820 atm× V = 0.27 mol × 0.0821 atm.L/mol.K ×426 K

V = 9.44 atm.L / 0.820 atm

V =  11.51 L

Answer:

6 protons and 8 neutrons (please help me with my questions too!)

Explanation:

The atomic mass is 18, if you subtract the atomic number ( the number of protons) to the atomic mass you get it.