Calculate the heat in kJ required to convert 2.1 g of water at 52.1°C to steam at 100°C. The specific heat of water is 4.184 J/g°C and the heat of vaporization of water is 2260 J/g.

Three examples of environmental, industrial and bio-chemistry are listed below:

Chemistry can be defined as a branch of science which is concerned with the substances matter is composed of, their properties and reactions,

Chemistry also deals with the use of such reactions to form new substances.

In conclusion, Three examples of environmental, industrial and bio-chemistry are listed anove

Learn more about chemistry: https://brainly.com/question/24419453

#SPJ1

If the concentration of nitrosyl bromide is doubled, the rate of the reaction will also increase. This is because the rate of a reaction is directly proportional to the concentration of reactants.

As for the effect on the rate constant, it depends on whether the reaction is affected by the concentration of nitrosyl bromide alone or if other factors like temperature, pressure, or the presence of a catalyst are also influencing the rate constant. If the rate constant is dependent solely on the concentration of nitrosyl bromide, then it will also double when the concentration of the reactant is doubled. However, if other factors are influencing the rate constant, then the effect may be more complex.

To learn more about  nitrosyl bromide refer to:

brainly.com/question/28382535

#SPJ4

Answer:

6 gallons of gasoline for $14.45 is the best price

Explanation:

26.29/11=2.39 $ per gallon

14.45/11=1.31 $ per gallon

Answer:

more dense than liquids

Explanation:

Answer:

Explanation:

The relation between new scale and absolute temperature scale is given as follows

Aw = 2 K

for K = 273.15 ( freezing point of water at absolute scale )

Aw = 2 x 273.15 = 546.3 K

So each division of new scale is half the each division of absolute scale

each division of new scale is small .

The value of R  = 8.314 J per mole per K

Here per K is equivalent to 2Aw

So the vale of R in new scale = 8.314/2 J per mole per Aw

=  4.157 J per mole per Aw

k = R / N

= 4.157 / 6.02 x 10²³

= .69 x 10⁻²³

= 6.9 x 10⁻²⁴ J per molecule per Aw .

The third law of thermodynamics describes the entropy of a: solid.

The third law of thermodynamics states that the entropy of a pure crystalline substance approaches zero as the temperature approaches absolute zero (0 Kelvin or -273.15 degrees Celsius). This law implies that at absolute zero, a perfectly ordered and pure crystalline solid will have zero entropy.

The third law of thermodynamics is not specific to liquids or gases but applies to solids. In a solid, the molecules are highly ordered and have fixed positions in a regular lattice structure. As the temperature decreases towards absolute zero, the thermal motion of the molecules reduces, and the system becomes more ordered, resulting in a decrease in entropy.

In contrast, liquids and gases have higher entropy compared to solids at absolute zero because their molecules have more freedom of movement and are not as tightly arranged. Therefore, the third law of thermodynamics specifically addresses the entropy of solids and does not apply to liquids or gases.

To learn more about law of thermodynamics, here

https://brainly.com/question/1368306

#SPJ4

Answer:

minerals,organic matter,water and air

Explanation:

The basic components of soil are minerals, organic matter, water and air. The typical soil consists of approximately 45% mineral, 5% organic matter, 20-30% water, and 20-30% air. These percentages are only generalizations at best. In reality, the soil is very complex and dynamic.

Answer:

Density rectangular block = 7.47 (Approx) gm/cm³

Explanation:

Given:

Length = 8.335 cm

Width = 1.02 cm

Height = 0.982 cm

Mass = 62.3538 gm

Find:

Density rectangular block

Computation:

Volume of block = lbh

Volume of block = (8.335)(1.02)(0.982)

Volume of block = 8.3486 cm³

Density = Mass / Volume

Density rectangular block = 62.3538 / 8.3486

Density rectangular block = 7.47 (Approx) gm/cm³

Pressure is the most important factor for air density.

The most important factor for determining the density of a parcel of air is its pressure.

The density of a gas is directly proportional to its pressure and inversely proportional to its temperature. Mathematically, the relationship is expressed by the ideal gas law:

Density = (Pressure)/(Gas constant x Temperature)

Where the gas constant is a constant that depends on the type of gas being considered.

Therefore, for a given gas, the density will increase with an increase in pressure and decrease with a decrease in pressure. This means that a parcel of air at a higher pressure will be denser than the same parcel of air at a lower pressure, all other things being equal.

Other factors that can affect the density of a parcel of air include its temperature, humidity, and composition. However, for a given gas, the pressure is the most important factor for determining it  density

Learn more about Air Density.

brainly.com/question/3551743

#SPJ11

Answer:

First check to make sure you have a balanced equation

Second use mole ratios to set up what you need to know

Finally convert the moles to grams using the correct molecular weight

I will get you started

According to the reaction above, one mole of Magnesium Nitrate is produced from 2 moles of Nitric Acid

1 mole of Mg(NO3)2/2 moles of HNO3

5 grams of Nitric acid contains

5 g * 1 mole/63 g of Nitric Acid = 0.079365079 moles

Explanation:

For the reaction 2HNO3 + Mg(OH)2 → Mg(NO3) 2 + 2H2O,0.0793grams of magnesium nitrate are produced from 4 grams of nitric acid, HNO3.

Magnesium nitrates are inorganic substances with the formula Mg(NO3)2x, where x is one of six, two, or zero. Each one is completely white. The hygroscopic anhydrous substance swiftly transforms into the hemihydrate when exposed to air. In both water and ethanol, all the salts are extremely soluble.

Magnesium nitrate is a crystalline (sand-like), flavourless, colourless, or white substance. Both the production of petrochemicals and pyrotechnics employ it as a catalyst.

The inorganic nitrate salt of magnesium is called magnesium nitrate. It functions as fertilizer. It is a magnesium salt and an inorganic nitrate salt.

Convert the moles to grams using the correct molecular weight

According to the reaction

one mole of Magnesium Nitrate is produced from 2 moles of Nitric Acid

1 mole of Mg ( NO3 ) 2 / 2 moles of HNO3

5 grams of Nitric acid contains

5 g * 1 mole/63 g of Nitric Acid

= 0.079365079 gram

Thus, For the reaction 2HNO3 + Mg(OH)2 → Mg(NO3) 2 + 2H2O,0.0793grams of magnesium nitrate are produced from 4 grams of nitric acid, HNO3.

To learn more about magnesium nitrate, follow the link;

https://brainly.com/question/29801876

#SPJ2

I don't know

Explanation:

because it does not give an question

Answer:

The aluminium cation Al3+ which is small and highly charged; and is polarizing and bonds aluminium forms tend towards covalency.

Explanation:

Cu2+ is reduced to Cu.

Change in oxidation state is from +2 to 0

Thyroid hormone contains the mineral iodine (option I). Details about thyroid hormone can be found below.

Thyroid hormone is the hormone produced by the thyroid gland of the body, which is a large butterfly-shaped endocrine gland situated on the front of the neck that produces various hormones.

The thyroid hormone is responsible for regulating metabolism, which controls the amount of calories burnt in a day.

One of the major minerals found in the thyroid is iodine. The thyroid gland absorbs iodine from the bloodstream, and then stores it to aid in the production of thyroid hormones.

Therefore, the thyroid hormone contains the mineral iodine.

Learn more about thyroid at: https://brainly.com/question/13856314

#SPJ1

True. Thermal energy, which is quantified as heat, is the movement of particles inside a material. Particles exchange energy in the form of heat as they travel more quickly or collide with one another.

Hence, thermal energy may be produced by the movement of particles.

The movement of particles within a material results in the production of thermal energy, often known as heat energy. Kinetic energy, which occurs when particles travel more quickly, or potential energy, which occurs when particles vibrate more quickly, might cause this movement. As particles contact, heat is transferred from one particle to the next, and this energy transfer lasts until the substance reaches thermal equilibrium. The temperature and quantity of heat energy within the material increase with particle mobility. Understanding this concept is crucial for comprehending a variety of phenomena, such as heat transport, thermodynamics, and the behaviour of matter in different states.

learn more about  Thermal energy here:

https://brainly.com/question/18989562

#SPJ4

True. In major keys, the tonic (I), subdominant (IV), and dominant (V) triads are major.

This is because the major scale follows a specific pattern of whole and half steps, and the tonic, subdominant, and dominant notes fall on the first, fourth, and fifth scale degrees respectively.

When these notes are harmonized to form triads, they naturally result in major chords. However, it's important to note that in minor keys, the subdominant and dominant triads are often different (minor or diminished) than in major keys.
True, in major keys, the tonic, subdominant, and dominant triads are major. In a major key:

1. Tonic triad (I) is formed using the 1st, 3rd, and 5th scale degrees and is major.
2. Subdominant triad (IV) is formed using the 4th, 6th, and 1st scale degrees and is also major.
3. Dominant triad (V) is formed using the 5th, 7th, and 2nd scale degrees and is major as well.

These three triads are crucial in establishing the tonality of a major key and are all major in quality.

For more information on tonality visit:

brainly.com/question/10410442

#SPJ11

Answer:

d. forced migration

Explanation:

Certain hazardous occurrences affect living organisms in their natural habitat. One of those occurrences is forest fire. Forest fire or vegetation fire is an uncontrollable break out of fire in a vegetation, affecting the inhabitants of the area.

The occurrence of a forest fire will lead to a forced migration of organisms from their natural habitat. Animals and other mobile organisms will be forced to leave behind their devastating habitat and migrate to a less threatened area in order to survive.

Answer:

D

Explanation:

The guy above is correct but I’m saying this for those who don’t want an explanation

DCA stimulates pyruvate dehydrogenase activity by inhibiting pyruvate dehydrogenase kinase, allowing for increased conversion of pyruvate into acetyl-CoA. This suggests that patients who respond to DCA treatment have functional pyruvate dehydrogenase complexes with residual activity.

DCA acts by inhibiting pyruvate dehydrogenase kinase, which prevents the inactivation of the pyruvate dehydrogenase complex and stimulates its active .

Pyruvate dehydrogenase deficiency leads to reduced activity of the pyruvate dehydrogenase complex, resulting in the accumulation of pyruvate and the subsequent production of lactic acid. DCA, as a pharmacological compound, targets pyruvate dehydrogenase kinase and inhibits its function. By doing so, DCA prevents the phosphorylation and inactivation of the pyruvate dehydrogenase complex, allowing it to remain active and promote the conversion of pyruvate into acetyl-CoA. This metabolic shift reduces the levels of pyruvate available for lactic acid production, leading to a decrease in lactic acid levels in the blood.

The fact that patients with pyruvate dehydrogenase deficiency respond to DCA treatment suggests that their pyruvate dehydrogenase complexes retain some degree of activity. While the deficiency may impair the overall function of the complex, the presence of residual activity indicates that the enzyme complex is not completely non-functional. The response to DCA suggests that the remaining functional pyruvate dehydrogenase complex can be stimulated to a certain extent by inhibiting pyruvate dehydrogenase kinase. This implies that the deficiency may be partial rather than complete in these patients.

Learn more about Dehydrogenase

brainly.com/question/30881290

#SPJ11

Answer:

See below.

Explanation:

Since energy is released when bonds form, the process of burning food can be explained through exothermic reactions. We use food as a resource to obtain energy through calories, where the chemicals that makeup food result in endothermic reactions to fulfill our dietary needs. As a result, that energy MUST be released since energy can neither be created nor destroyed. Therefore, it must come out as the bonds are broken (usually hydrogen bonds during the process of cellular respiration). While calories are being burned, energy is released, causing bonds to break and resulting in exothermic reactions.

The standard enthalpy change for reaction (3) is 117.1 kJ.

The standard enthalpy change for reaction (3) can be calculated by using the enthalpy changes of reactions (1) and (2) and applying Hess's Law.

To do this, we need to manipulate the given equations so that the desired reaction (3) can be obtained.

First, we reverse reaction (1) to get the formation of C2H4(g) from C2H6(g):

C2H4(g)C2H6(g) ΔH° = -52.3 kJ

Next, we multiply reaction (2) by 2 and reverse it to obtain 2 moles of C2H6(g) reacting to form 3 moles of H2(g):

2C2H6(g)2C(s) + 3H2(g) ΔH° = 169.4 kJ

Now, we add the two modified equations together:

C2H4(g)C2H6(g) ΔH° = -52.3 kJ
2C2H6(g)2C(s) + 3H2(g) ΔH° = 169.4 kJ

When adding these equations, the C2H6(g) on the left side cancels out with the C2H6(g) on the right side, leaving us with the desired reaction (3):

C2H4(g) + H2(g)C2H6(g) ΔH° = -52.3 kJ + 169.4 kJ = 117.1 kJ

Learn more about standard enthalpy here :-

https://brainly.com/question/28303513

#SPJ11

Answer:

I believe it's copper

Explanation:

The reasoning being that Copper = 9.0 g/cm and the mystery item has 5.0 cm so 9*5 = 45 something like that

Answer:

Iodine is a mineral found in some foods. The body must have iodine to make thyroid hormones. The hormones control the body's metabolism and many other important functions. Without iodine, thyroid hormone production can decrease.

Explanation:

The molarity of a substance is simply defined as the mole of solute per unit litre of the solution. Mathematically, it is expressed as:

\(Molarity = \frac{mole}{volume }\)

From the question given above, the following data were obtained:

Molarity of KCl = 2.45 M

Mole of KCl = 0.5 mole

The volume of KCl needed can be obtained as follow:

\(Molarity = \frac{mole}{volume }\\\\2.45 = \frac{0.5}{Volume }\)

Cross multiply

2.45 × Volume = 0.5

Divide both side by 2.45

\(Volume = \frac{0.5}{2.45}\\\)

Therefore, 0.20 L is needed to make the solution.

Learn more: https://brainly.com/question/23816507

Answer:

chemical composition

Answer:

2. Periods

Explanation:

The elements are arranged in seven horizontal rows, called periods or series, and 18 vertical columns, called groups. ... Elements in the periodic table are organized according to their properties.

The type of bonding expected for each substance is as  Co(s): Metallic bonding, CoCl2(s): Ionic bonding, CCl4(l): Covalent bonding.

a. Co(s) (solid cobalt): Metallic bonding is expected in solid cobalt. Metallic bonding occurs between metal atoms, where the valence electrons are delocalized and form a "sea" of electrons that can move freely throughout the metal lattice. This results in high electrical and thermal conductivity.

b. CoCl2(s) (solid cobalt(II) chloride): Ionic bonding is expected in solid cobalt(II) chloride. Ionic bonding occurs between a metal cation (Co2+) and nonmetal anions (Cl-). The Co2+ cations donate electrons to the Cl- anions, resulting in the formation of a lattice structure held together by strong electrostatic forces.

c. CCl4(l) (liquid carbon tetrachloride): Covalent bonding is expected in liquid carbon tetrachloride. Covalent bonding occurs between nonmetal atoms, where they share electrons to achieve a stable electron configuration. In carbon tetrachloride, the carbon atom shares electrons with four chlorine atoms, forming a tetrahedral molecule held together by covalent bonds.

To learn more about Metallic bonding click here :

brainly.com/question/16026653

#SPJ11

a) The hydrogen ion concentration of the solution is 7.3761 x 10^-5 moles per liter, b) the total surface area of the country is 6.9470 x 10^4 square miles.

(a) The hydrogen ion concentration of the solution is given as 0.000073761 moles per liter. To express this number in scientific notation, we need to move the decimal point to the right until there is only one non-zero digit to the left of the decimal point, and then multiply by 10 raised to the appropriate power.

In this case, we can move the decimal point five places to the right to obtain \(7.3761 \times 10^{-5\) moles per liter.

(b) The total surface area of the country is given as 69,470 square miles. To express this number in scientific notation, we need to convert it to a number between 1 and 10, multiplied by a power of 10.

We can do this by moving the decimal point to the left until there is only one non-zero digit to the left of the decimal point, and then multiplying by 10 raised to the appropriate power. In this case, we can move the decimal point four places to the left to obtain \(6.9470 \times 10^4\) square miles.

For more such questions on concentration

https://brainly.com/question/28564792

#SPJ11