Atoms are tiny particles that makes up matter true or false

Answer:

Sugar, Carbon Dioxide, And Water

Explanation:

A chemical substance is a form of matter having constant chemical composition and characteristic properties. Some references add that chemical substance cannot be separated into its constituent elements by physical separation methods, i.e., without breaking chemical bonds. Chemical substances can be simple substances, chemical compounds, or alloys. Chemical elements may or may not be included in the definition, depending on expert viewpoint.

1. The volume of the stock solution needed is 0.008 L

2. The concentration of the diluted solution is 0.52 M

1. How to determine the volume of the stock solution

We can obtain the volume of the stock solution as follow:

M₁V₁ = M₂V₂

7 × V₁ = 0.480 × 0.120

5 × V₁ = 0.0576

Divide both side by 7

V₁ = 0.0576 / 7

V₁ = 0.008 L

Thus, the volume needed is 0.008 L

2. How to determine the concentration of the diluted solution

We can obtain the concentration of the diluted solution as follow:

C₁V₁ = C₂V₂

7 × 20 = M₂ × 270

140 = M₂ × 270

Divide both side by 270

C₂ = 140 / 270

C₂ = 0.52 M

Thus, the concentration is 0.52 M

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Answer:

yes because it has a fixed shape and volume

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Explanation:

Explanation:

Option C. 2 H-H and 2 O=O bonds are broken is the correct answer.

In the reaction 2H₂O → H₂ + 2O₂, two water molecules are broken down into hydrogen gas and oxygen gas. Each water molecule contains two O-H bonds and one O=H bond. Therefore, in the reaction, a total of four O-H bonds and two O=H bonds are broken. However, the question specifically asks for the number of bonds broken, not the number of bonds broken of a certain type.

To determine the total number of bonds broken, we can count the number of atoms on both sides of the reaction. The reactant side has 4 hydrogen atoms and 4 oxygen atoms, while the product side has 2 hydrogen atoms and 4 oxygen atoms. This means that a total of 4 H-O bonds and 4 O-O bonds are broken in the reaction.

Since each O=O bond consists of one O-O bond, a total of 2 O-H bonds and 2 O=O bonds are broken in the reaction. Therefore, option C. 2 H-H and 2 O=O bonds are broken is the correct answer.

Answer:

48.0 grams

Explanation:

The products of this reaction are nitrogen gas and water. How many grams of sodium hydroxide (NaOH) are needed to completely react with 50.0 grams of sulfuric acid (H2SO4) to form sodium sulfate (Na2SO4) and water? 2NaOH + H2SO4 → Na2SO4 + 2H2O ; 48.0 grams of NaOH are needed.

51.020  grams of sodium hydroxide is needed to completely react with 50 grams of sulfuric acid according to stoichiometry.

It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining  weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.

The reaction between sodium hydroxide and sulfuric acid is as follows,

2 NaOH + H₂SO₄\(\rightarrow\)Na₂SO₄+2 H₂O

From the reaction, it is clear  that 2 oles of sodium hydroxide react with 1 mole of sulfuric acid to give products. According to molar mass concept,

100 g of sodium hydroxide gives 98 g of sulfuric acid

Therefore, 50 gram of sulfuric acid requires 50×100/98=51.020 g

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Answer:

The value is \(k =66\%\)

Explanation:

From the question we are told that

The mass of toluene \( m_t =0.73 \ g \)

The mass of potassium permanganate is \( m =2.0 \ g \)

The volume of potassium hydroxide V = 7.0 mL

The concentration of potassium hydroxide C = 6 M

The mass of benzoic acid is \(m_b = 0.633 \ g\)

Generally the % yield of benzoic acid is mathematically represented as

\(k = \frac{m_b}{Z} * 100\)

Here Z is the theoretical yield which is mathematically represented as

\(Z = \frac{E}{W} * m_t \)

Here W is the molecular weight of product (benzoic acid) with value  

       W  = 92.14 \ g

E is the molecular weight of reactant (toluene)with a constant value  of  

    E =  122.12 g

So

     \(Z =  \frac{122.12 }{92.14}  *  0.73 \)

=>    \(Z = 0.968 \  g  \)

So

     \(k  =  \frac{0.633}{0.968}  * 100\)

=>   \(k  =66\%\)

A waterfall is a river's water falling rapidly to the ground. It is created in a river's upper course where there are high mountains.

Thus, Many waterfalls are transient and only occur during rainstorms because of their location in the landscape, where they are often over bedrock and fed by a small contributing region.

 For general knowledge, we are listing the "Top 10 Highest Waterfalls in India" here. The Kunchikal Falls are the second-highest waterfall in Asia and the highest in all of India.

The waterfall, which is close to Agumbe in Karnataka's Shimoga district, has a height of 1,493 feet. The Varahi River creates the biggest waterfall. The sole permanent rain forest research is located in Agumbe Valley, one of India's most heavily rained-on regions.

Thus, A waterfall is a river's water falling rapidly to the ground. It is created in a river's upper course where there are high mountains.

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Answer:

no answer of this question

Answer:

atom

Explanation:

is the basic unit of any substance

concept of atom was conceived in ancient india

scientists today have found substances even smaller

they called

quarks & gluons

energygoclv

Answer: The number of oxygen atoms

Explanation: Carbon Monoxide (CO) and Carbon Dioxide (CO2), are part of a group called Nonmetal Oxides. To name these kinds of compounds, you must always add a prefix to the last element named based on how many atoms it has. Because CO2 has 2 oxygen molecules, the prefix "di" is added. In Carbon Monoxide's case, there is only one oxygen molecule, so the prefix "mono" is added.

Answer:

To answer this question, we will need to use the gas law which states that:

PV = nRT where:

P is the pressure of the gas = 740 mmHg = 98658.550357 Pascal

V is the volume = 450 ml = 0.45 liters

n is the number of moles that we will calculate

R is the gas constant =  8.314 J/(K. mol)

T is the temperature = 35 celcius = 308 degrees kelvin

Substitute with these values in the above equation to get the number of moles as follows:

98658.550357 * 0.45 = n * 8.314 * 308

n = 17.3375 moles

Each mole contains Avogadro's number of atoms, therefore:

number of atoms = 17.3375 * 6.02 * 10^23 = 1.0437 * 10^25 atoms

The equation for the equilibrium constant (K) of the reaction studied in this exercise can be written as follows: K = ([\(CI_20\), 2-] * [\(H_20\)(1)]) / ([\(C0_4^ 2\)-] * [Ht])

In this equation, the concentrations of the species involved in the reaction are represented by the square brackets [ ]. The subscripts indicate the stoichiometric coefficients of each species in the balanced chemical equation.

The reaction being studied involves the following species:

\(C0_4^ 2\)- (ag) + 2Ht (ag) = \(CI_20\), 2- (ag) + \(H_20\)(1)

In the equilibrium constant expression, the concentration of \(CI_20\), 2- is multiplied by the concentration of \(H_20\)(1) and divided by the product of the concentrations of \(C0_4^ 2\)- and Ht. The stoichiometric coefficients in the balanced equation are used as exponents for the concentrations of the respective species.

It is important to note that the concentrations used in the equilibrium constant expression should be in molar units (mol/L) or expressed as partial pressures for gases.

Additionally, the equilibrium constant is specific to a given temperature, and its value provides information about the relative amounts of reactants and products at equilibrium.

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We need more information to solve this problem. Specifically, we need to know the volume (or concentration) of HCl used to react with the Mg. Without that information, we cannot determine how many grams of Mg reacted.

Answer:

Nitrogen fixation

Explanation:

In order for nitrogen to be available to make proteins, DNA and other biologically important compounds, it must first be converted into a chemical form. The process of converting N2 into biologically available nitrogen is called nitrogen fixation.

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The vapor pressure of methanol at 40°C is 0.234 atm.

Only two types of alcohol are methanol and ethanol. Ethanol, sometimes referred to as ethyl alcohol, has a chemical composition of two carbon atoms. Methanol, sometimes referred to as methyl alcohol, is made up of just one carbon atom.

ln(P2/P1) = (ΔHvap/R) x (1/T1 - 1/T2)

ΔGvap = -RTln(Pvap/P) = ΔHvap - TΔSvap

ΔGvap = -RTln(Pvap/P) = -166.6 kJ/mol

ΔSvap = S(g) - S(l) = 239.9 J/mol-K - 126.8 J/mol-K = 113.1 J/mol-K

ΔHvap = ΔGvap + TΔSvap = -166.6 kJ/mol + (298.15 K)(113.1 J/mol-K) = -134.6 kJ/mol

Now we can use the Clausius-Clapeyron equation to find the vapor pressure of methanol at -30°C and 40°C.

At -30°C, we have:

T1 = 25°C + 273.15 = 298.15 K

T2 = -30°C + 273.15 = 243.15 K

ΔHvap = -134.6 kJ/mol

R = 8.314 J/mol-K

ln(P2/5 atm) = (-134.6 kJ/mol / 8.314 J/mol-K) x (1/298.15 K - 1/243.15 K)

P2 = 0.0038 atm

Therefore, the vapor pressure of methanol at -30°C is 0.0038 atm.

At 40°C, we have:

T1 = 25°C + 273.15 = 298.15 K

T2 = 40°C + 273.15 = 313.15 K

ΔHvap = -134.6 kJ/mol

R = 8.314 J/mol-K

ln(P2/5 atm) = (-134.6 kJ/mol / 8.314 J/mol-K) x (1/298.15 K - 1/313.15 K)

P2 = 0.234 atm

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\(0.68 \: moles \: calcium \times \frac{6.02 \times {10}^{23} \: calcium \: atoms }{1 \: mole \: calcium} \\ \)

The (( mole calcium ))s are simplified so the answer is based on the number of calcium atoms.

\(0.68 \times 6.02 \times {10}^{23} = 68 \times {10}^{ - 2} \times 602 \times {10}^{ - 2} \times {10}^{23} \\ \)

\( = 68 \times 602 \times {10}^{ - 4} \times {10}^{23} = 40936 \times {10}^{19} \\ \)

\( calcium \: atoms = 40936 \times {10}^{19} \\ \)

_________________________________

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Answer:

The correct symbol for 1 atom of oxygen is O

Explanation:

The number of atoms of any element in the given chemical formula is the number that is written on the foot of the symbol of that element. The the correct symbols or formula of 1 one atom of oxygen is O.

Atom is the smallest particle of any matter. Atom combines to form element and element combine to form molecule or compound.

Atom consists of electron, proton and neutron. The total mass of atom is inside the nucleus. Inside the nucleus proton and neutron is there. So calculate mass of an atom, total mass of all protons is added to the total mass of neutron. Electrons revolve around the nucleus.

Atom of any element is just the symbol of that element. The the correct symbols or formula of 1 one atom of oxygen is O.

Thus, the correct symbols or formula of 1 one atom of oxygen is O.

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Answer:

1) Oxidation-Reduction (Redox) Reaction

2) Combustion Reaction

3) Decomposition Reaction

4) Synthesis Reaction

5) Single Displacement (Substitution) Reaction

6) Double Displacement (Metathesis) Reaction

7) Acid-Base Neutralization Reaction

8) Precipitation Reaction

Here are the Answer:

1. Oxidation-Reduction (Redox) Reaction

2. Combustion Reaction

3. Decomposition Reaction

4. Synthesis Reaction

5. Single Displacement (Substitution) Reaction

6. Double Displacement (Metathesis) Reaction

7. Acid-Base Neutralization Reaction

8. Precipitation Reaction

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Melting snow and boiling water!

We are given:

m1 = 6 M                   v1 = x L

m2 = 0.250 M          v2 = 4 L

Using the dilution equation:

m1*v1 = m2*v2

(6)*(x) = (0.250)(4)

6x = 1

x = 1 / 6

Hence, 1/6 Litres (0.167 L) of 6M solution is required in order to make 4 litres of 0.250 M solution of HClO₄

Biotechnology is the use of living organisms or other biological systems in the manufacture of drugs or other products or for environmental management, as in waste recycling: includes the use of bioreactors in manufacturing, microorganisms to degrade oil slicks or organic waste, genetically engineered bacteria to produce human hormones, and monoclonal antibodies to identify antigens.

Biotech offers the possibility of improving human health, the environment, and agriculture while creating more sustainable modes of production.

Answer:

V = 268.8 L

Explanation:

Given data:

Number of moles of nitrogen = 12 mol

Temperature = 273 K

Pressure = 1atm

Volume occupy = ?

Solution:

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

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

T = temperature in kelvin

1 atm × V = 12 mol ×0.0821 atm.L/ mol.K   × 273 K

V = 268.95 atm.L / 1 atm

V = 268.8 L

Answer:frh

Explanation:

Answer:

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Answer:

A

Explanation:

behavior modification

Based on the given bright-line spectra and the observed wavelengths in the mixture's spectrum, the elements G and J are the ones present in the mixture.

From the given bright-line spectra and the spectrum of the mixture, we can determine the elements present in the mixture by comparing the specific wavelengths observed. Examining the bright-line spectra, we can identify that G has a distinct wavelength at 650 nm, J at 600 nm, L at 550 nm, and M at 500 nm.

Looking at the spectrum of the mixture, we can observe two prominent wavelengths, 650 nm and 600 nm. These correspond to the wavelengths of G and J, respectively. Since the spectrum of the mixture does not exhibit the wavelengths specific to L (550 nm) or M (500 nm), we can conclude that only G and J are present in the mixture.

Therefore, based on the given bright-line spectra and the observed wavelengths in the mixture's spectrum, the elements G and J are the ones present in the mixture.

This analysis relies on the principle that each element has characteristic wavelengths at which they emit light. By comparing the observed wavelengths in the mixture's spectrum with those of the individual elements, we can determine the elements present in the mixture.

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Heating a gas increases the kinetic energy of the particles, causing the gas to expand. In order to keep the pressure constant, the volume of the container must be increased when a gas is heated.

At 298 K, the reaction N2(g) + 3H2(g) 2NH3(g) results in an enthalpy change (H) of -92.38 kJ.

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