Write a balanced chemical equation for the incomplete combustion of methane to produce CO(g) as the only carbon-containing product.

The growth of the new plant depicts the asexual reproduction characteristic. The characteristic that describes the growth of the new plant in Stephan's mother cutting a twig from a rose bush and planting it in the soil is asexual reproduction.

Asexual reproduction is the mode of reproduction by which organisms generate offspring that are identical to the parent's without the fusion of gametes. Asexual reproduction is a type of reproduction in which the offspring is produced from a single parent.

The offspring created are clones of the parent plant, meaning they are identical to the parent.The new plant in Stephan’s mother cutting a twig from a rose bush and planting it in the soil depicts the process of asexual reproduction, which is the ability of a plant to reproduce without seeds. In asexual reproduction, plants can reproduce vegetatively by cloning themselves using their roots, bulbs, or stems.

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Answer:

The sun's position near earth

Explanation:

There are moles of Mn in a sample of Mn that contains 3.80 × 10²⁴ atom is 6.31 moles.

The number of moles in a substance can be calculated by dividing the number of atoms of that substance by Avogadro's number, which is equivalent to 6.02 × 10²³ atoms.

No of moles = no of atoms ÷ 6.02 × 10²³

According to this question, there are 3.80 × 10²⁴ atoms in manganese element. The number of moles in this substance is as follows:

no of moles = 3.80 × 10²⁴ ÷ 6.02 × 10²³

no of moles = 6.31 moles

Therefore, 6.31 moles is present in 3.80 × 10²⁴ atoms of manganese.

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Answer:

Particle Symbol Mass

electron e- 0.0005486 amu

proton p+ 1.007276 amu

neutron no 1.008665

Answer:

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Questions & Answers

CBSE

Chemistry

Grade 11

The Gaseous State

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Answer

What volume will a gas occupy at 740mm pressure which at 1480 mm occupies 500 cc? Temperaturebeingconstant.

Last updated date: 30th Dec 2022

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Hint: Boyle in the mid 1600’s observed that the product of the pressure and volume of a gas are observed to be nearly constant provided that the temperature is kept constant. This is always true in the case of an ideal gas.

P×V=constant

This relationship between pressure and volume of an ideal gas is known as the Boyle's Law.

Complete answer:

Since it is given in the question that temperature can be assumed as constant, we can apply Boyle’s Law.

According to Boyle's Law we know that:

⇒P×V=constant

We can rewrite this as

⇒P1×V1=P2×V2

Where P1 is the pressure at the volume V1

P2 is the pressure at the volume V2

Thus from the given question we can say that:

P1 = 1480 mm

V1 = 500 cc

P2 = 740 mm

V2 = x

Thus we can rewrite the equation and substitute the above values and obtain the equation given below:

⇒V2=P1×V1P2

⇒V2=1480×500740

⇒V2=1000cc

Thus the volume of gas occupied at a pressure of 740 mm is 1000 cc.

Answer:

37.1 g of Arsenic

Explanation:

2.98 x 10^21 atoms of Arsenic x 74.92g/6.02 x 10^23

= 223.26 x 10^21/6.02 x 10^23

= 2.2326 x 10^23/6.02 x 10^23

= 37.1 g of Arsenic

The mass of the percent of the 10 g solute in the 105 g solvent is 8.69 %.

The mass of the solute = 10 g

The mass of the solvent = 105 g

The mass of the solution = 10 g + 105 g

The mass of the solution = 115 g

The mass of the percent is expressed as :

The mass of percent = ( mass of solute / mass of solution ) × 100 %

The mass of solute = 10 g

The mass of solution = 115 g

The mass of percent = ( 10 / 115 ) × 100 %

The mass of percent = 8.69 %

Thus, the mass of percent is 8.69 % and the mass of solute is 10 and the mass of the solution is 115 g.

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Answer:

the volume of a gas is changed from ___ mL to 852 mL, the temperature will change from 588 K to 725 K.V(volume) = [?] mLAssume that the number of moles and the pressure remain constant.To find the initial volume of the gas, we can use the combined gas law, which states that: (P1V1)/T1 = (P2V2)/T2 We are given the initial temperature T1 = 588 K and the final temperature T2 = 725 K. We are also told that the number of moles and the pressure remain constant, so we can assume that P1 = P2 and n1 = n2. Let's plug in the values we have: (P1V1)/588 = (P1*852)/725 Simplifying this equation, we can isolate V1: V1 = (588*852)/725 V1 = 691.2 mL Therefore, the initial volume of the gas was 691.2 mL.

In the context of this problem, we can utilize Charles's Law which states the volume of a gas is directly proportional to its absolute temperature. We solve for the unknown volume (V1) using the provided values and the formula derived from Charles's Law. The estimated answer is approximately 686 mL.

The subject of your question involves the concept of gas laws specifically the Charles's Law which states that the volume of a gas is directly proportional to its absolute temperature, provided the number of moles and pressure remain constant. In this scenario, we can apply Charles's Law as both the number of moles and pressure are constant. To find the unknown volume, we should use the formula (V1/T1) = (V2/T2), where V1 is the unknown volume, T1 is the initial temperature, V2 is the final volume and T2 is the final temperature. In this case, the question left V1 blank, T1 is 588K, V2 is 852 mL and T2 is 725K. So its critical to ensure that temperatures are in Kelvin.

Arranging the formula to solve for V1, we have: V1 = (V2 * T1) / T2. Substituting the given values, we get: V1= (852 mL * 588 K) / 725 K = 685.9 mL

Therefore, the unknown volume V1, when the gas was initially at a temperature of 588K, would be approximately 686 mL.

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eu vou colocar V(verdadeiro) F (falso)

1:F  

2:F

3: V

4:F

explicação:

1 procariontes não apresentam núcleo

2 eles podem sim caso  contrário os seres procariontes não sobreviveriam

3   ele possui organelas celulares

4 as células eucariontes são maiores e mais complexas.

CONCLUSÃO: a resposta certa é a 3

Answer: 2 SO2 (g) + O2 (g) Kp = 7.69 If a vessel at this temperature initially ... and if the partial pressure of sulfur trioxide at equilibrium is 0.100 atm,

Explanation:

As sulfur dioxide has an equilibrium partial pressure of 0.100 atm. Hence, the partial pressure of O\(_2\) will be half of 0.100 atm, it is 0.05 atm.

Each gas that makes up a mixture of gases has a partial pressure, which would be the notional pressure of that gas as if it alone filled the original combination's complete volume at the same temperature. 

The thermodynamic activity of a gas's molecules is gauged by its partial pressure. Gases react, disperse, and dissolve based on their partial pressures rather than the concentrations they have in liquids or other gas combinations.

2 SO\(_2\) (g) + O\(_2\) (g) → SO\(_3\) Kp = 7.69

As sulfur dioxide has an equilibrium partial pressure of 0.100 atm. Hence, the partial pressure of O\(_2\) will be half of 0.100 atm, it is 0.05 atm.

Therefore, 0.05 atm is the partial pressure of O\(_2\) .

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Answer:

El termómetro expuesto directamente al sol medirá la temperatura del aire circundante y la radiación solar, pero no la temperatura del sol en sí.

Answer

neither

Explanation

A homogeneous mixture is a mixture in which the components that make up the mixture are uniformly distributed throughout the mixture. The composition of the mixture is the same throughout. There is only one phase of matter observed in a homogeneous mixture at a time.

A heterogeneous mixture is one in which the composition is not uniform throughout the mixture. A mixture of sand and water is the best example of a heterogeneous mixture.

The correct option for the question asked is neither

Answer:

The answer to your question is ⇔ anaphase

So it would be anaphase is the phase where the chromosones pull apart.

Explanation:

The sister chromatids are pairs of identical copies of DNA joined at a point called the centromere. During anaphase, each pair of chromosomes is separated into two identical, independent chromosomes. The chromosomes are separated by a structure called the mitotic spindle.

I hope this helps and have a wonderful day!

Granite is formed from cooled molten rock, while gneiss is formed solid rock bedt compares the way that these rocks are formed.

What is molten rocks?

Molten rocks, also known as magma, is hot, liquid rock that is found beneath the Earth's surface. It is formed when heat and pressure cause rocks to melt, releasing gas and other materials. Molten rocks can contain crystals, gas bubbles, and other materials.    When molten rock reaches the Earth's surface, it is called lava. Molten rocks can be made of many different minerals, including basalt, andesite, and rhyolite.

Therefore, Granite is formed from cooled molten rock, while gneiss is formed solid rock bedt compares the way that these rocks are formed.

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The mass (in grams) of fluorine the sample have is 2.91 g

First, we shall determine the mole of 9 grams of cobalt. Details below:

Mole = mass / molar mass

Mole of cobalt = 9 / 58.93

Mole of cobalt = 0.153 mole

Finally, we shall determine the mass of fluorine the present in the compound. Details below:

Mole = mass / molar mass

0.153 = Mass of fluorine / 19

Cross multiply

Mass of fluorine = 0.153 × 19

Mass of fluorine = 2.91 g

Thus, the mass of fluorine is 2.91 g

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The value of K changes, affected by temperature

Endothermic (ΔH = +): temperature rises ⇒ K increases

Exothermic (ΔH = -): temperature increases ⇒ K decreases

From the data in the problem, the value of K increases in proportion to the temperature, then the reaction is said to be endothermic (C)

The amount of volume of KOH solution that should be added to make 500mL of a 0.300M solution is 200mL.

The volume of a solution given the concentration can be calculated using the following expression;

CaVa = CbVb

Where;

According to this question, we are to calculate how many mL of a 0.75 M OH solution that should be added to a 500 mL flask to make 500 mL of a 0.300 M KOH solution.

0.75 × Va = 500 × 0.3

0.75Va = 150

Va = 150/0.75

Va = 200mL

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Answer:

Explanation:

1.08kg/50.5 cm^3(1000g/kg)=21.386 g/cm^3

Answer:

\(\boxed {\boxed {\sf 21.4 \ g/cm^3}}\)

Explanation:

We are asked to find the density of an object.

The density of a substance is its mass per unit volume. It is calculated by dividing the mass by the volume.

\(\rho= \frac{m}{v}\)

The mass of the object is 1.08 kilograms. The object displaced 50.50 cubic centimeters of water, so this value is its volume.

We are asked to give the density in grams per cubic centimeter, so we must convert the mass. There are 1000 grams in 1 kilogram. Set up a conversion factor.

\(\frac {1000 \ g}{1 \ kg}\)

Multiply by the given mass: 1.08 kg

\(1.08\ kg *\frac{1000 \ g }{ 1\ kg}\)

The units of kilograms cancel.

\(1.08*\frac{1000 \ g }{1}\)

\(1.08*{1000 \ g } = 1080 \ g\)

Now we know the mass in grams and the volume:

Substitute the values into the density formula.

\(\rho= \frac{1080 \ g }{50.50 \ cm^3}\)

Divide.

\(\rho= 21.3861386 \ g/cm^3\)

The original measurements of mass and density have 3 and 4 significant figures. Our answer must have the least number of significant figures, or 3.

For the number we found, that is the tenths place. The 8 in the hundredth place tells us to round the 3 in the tenths place up to a 4.

\(\rho \approx 21.4 \ g/cm^3\)

The density of the object is approximately 21.4 grams per cubic centimeter.

Answer:

See explanation

Explanation:

The Lewis dot structure is a representation of atoms in which the valence electrons on the atoms are shown as dots. Each dot represents a valence electron on the outermost shell of the atom.

Oxygen has six electrons on its outermost shell four of which are two lone pairs. Also, chlorine has seven electrons in its outermost shell. Six of these are lone pairs.

Answer: 720 g

Explanation:

To solve this we must be knowing each and every concept related to mole. Therefore, shivani measures out 6.0 moles of epsom salt (MgSO\(_4\)) to put her bath. 1,566g MgSO\(_4\) went in the bath.

A mole is merely a measuring unit. In reality, it is one of its International System of Units' seven foundation units. When current units are insufficient, new units are created.

Chemical reactions frequently occur at levels where employing grams would be inappropriate, but using absolute quantities of atoms/molecules/ions would also be misleading.

For all practical reasons, one mole of a substance in grams is nearly equal to 1 molecule for the compound per daltons.

Mathematically,

number of mole =given mass ÷ molar mass

number of mole=6.0 moles

molar mass of epsom= 261.47g/mol

substituting all the given values in the above equation, we get

6.0 moles =mass of epsom ÷ 261.47g/mol

mass of epsom =1,566g

Therefore, 1,566g  MgSO\(_4\) went in the bath.

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The concentration of CaCl₂ is 75 % W/V. This means 75 g of the solute in 100 ml solution. Therefore, mass of calcium chloride required in 230 ml of this solution is 172.5 g.

Mass by volume percentage of a solute is term used to represent the concentration of the solution.  % W/V  of a solution is the mass of solute in grams per 100 ml of the solution.

It is given that the mass by volume percentage of the calcium chloride solution is 75% (w/v). Thus 75 g of calcium chloride is present in 100 ml of the solution.

Therefore, the mass of calcium chloride in 230 ml of this solution is calculated as follows:

mass of solute =  (230 ml  ×75 g) /100 ml

                         =  172.5 g

Hence, the mass of calcium chloride is 172.5 g.

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Answer:

Explanation:

The best practices while sharing a lab balance with other students includes alerting your TA or instructor about issues with the balance and Brushing off any chemical dust around the balance after each use. the practices will help to avert/reduce the work hazards associated with working with a balance.

Brushing off any chemical dust after each use will reduce the chemical hazards in the lab while Alerting your instructor about any issues with the balance helps to eliminate mechanical hazards that a faulty balance can pose

The best definition of the term Allotrope is : Different shapes of the same element in different physical states

The term allotrope refers to different forms of the same element that exist in different physical states or under different conditions, but have different structures and properties.

Examples of allotropes include diamond and graphite, which are both forms of carbon but have different structures and properties due to differences in their bonding arrangements. Another example is oxygen, which can exist as O2 (oxygen gas) and O3 (ozone), both of which have different physical and chemical properties.

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Answer:

X₅Y₂Z₃

Explanation:

The formula of a compound is determined as the whole number ratio between moles of each element present in the molecule.

The molecule is made from X, Y and Z. To fin the ratio we will divide the given moles in the moles of Y (0.197 moles), because is the element with the low number of moles.

X = 0.492 moles / 0.197 moles = 2.5

Y = 0.197 moles / 0.197 moles = 1

Z = 0.295 moles / 0.197 moles = 1.5

But, as the formula is given just with whole numbers, if we multiply each number twice:

X = 2.5*2 = 5

Y = 1*2 = 2

Z = 1.5*2 = 3

The formula is:

Answer:

the answer is a

Explanation:

Answer:

all of the above

Explanation:

i got the answer right on cK-12

Taking into account the reaction stoichiometry, 1 mole of H₂ can be produced by reacting 2 moles of HCI.

In first place, the balanced reaction is:

Mg + 2 HCl  → MgCl₂ + H₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

By reaction stoichiometry 2 moles of HCl form 1 mole of H₂.

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Answer:

I'm assuming this is for the SCl₆ compound and not SC₁₆? If so, the molecular geometry is octahedral.

Explanation:

There are 6 regions and zero lone pairs surrounding the central atom (S).