one gram of sugar provides 4.0 calories how many calories wil you get by drinking one can of 330 ml of cola

The equation for the Gaseous ammonia reacts with the  gaseous oxygen to form the gaseous nitrogen monoxide and the gaseous water is :

4NH₃(g)  +  5O₂(g)  ---->  4NO(g)   +  6H₂O(g).

The chemical equation is the representation of the reaction that takes place when the two or the more substances react together and form the various new products. The Gaseous ammonia will reacts with the gaseous oxygen to form gaseous nitrogen monoxide and the gaseous water , the equation is as follows :

4NH₃(g)  +  5O₂(g)  ---->  4NO(g)   +  6H₂O(g).

This is the balanced chemical equation, as the atoms in the reactant side is equals to the atoms in the product side.

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Given:

Sum of masses of two isotopes = 371.9087 u

Re-185 natural abudance = 37.40%

Re-187 natural abudance = 62.60%

Known:

atomic weight of Re = 186.207 u

Atomic mass of Re-185:

To find the atomic mass of Re-185, take the total mass given and subtract atomic weight.

abundance of Re-185 = 37.40% = 0.3740

(371.9087 - x) = atomic weight of Re-187 in u

To find mass of Re-187:

abundance of Re-187 = 62.60% = 0.6260

Solution:

Step 1. Multiply x times the abundance of Re-185 and multiply (371.9087 - x) times the abundance of Re-187.

Re-185: (0.3740)(x) = 0.3740x

Re-187: (0.6260)(371.9087 - x) = 232.8148462 - 0.6260x

Step 2. Add the results and set them equal to 186.207.

0.3740x + 232.8148462 - 0.6260x = 186.207

Step 3. Solve for x by subtracting 232.8148462 from both sides and then divide both sides by -0.2520.

0.3740x + 232.8148462 - 0.6260x - 232.8148462 = 186.207 -

232.8148462

0.3740x - 0.6260x = -46.6078462

-0.2520x = -46.6078462

-0.2520x/-0.2520x = -46.6078462/-0.2520

x = 184.9517706 u

Step 4. Atomic weights of Re-185 and Re-187.

x = 185.0 u = the atomic weight of Re-185

(371.9087 - 184.9517706) = 186.9569294 = 187.0 u = the atomic weight of Re-187

Therefore the atomic weight of Re-185 is 185.0 u, and the atomic weight of Re-187 is 187.0 u.

Answer:

B. Presented in all matter!

Answer:

B- presented in all matter :)

Explanation:

good luck!

Coefficient of C3H8O2 = 3

Coefficient of KMnO4 = 8

We are given that a reaction in which C3H8O2 reacts with KMnO4

We have to find the coefficient of each reactants in balanced reaction

3C3H8O2(aq) + 8KMnO4(aq) → 3C3H2O4K2(aq) + 8MnO2(aq) + 2KOH+8H2O

Coefficient is defined the constant value multiplied with a reactant in a reaction.

Coefficient of C3H8O2 = 3

Coefficient of KMnO4 = 8

Coefficient of C3H2O4K2 = 3

Coefficient of MnO2 = 8

Coefficient of H2O = 8

Coefficient of KOH = 2

Hence, Coefficient of C3H8O2 = 3 and coefficient of KMnO4 = 8

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Acid has a pH below 7 while water has a pH of 7. A strong acid with a pH of roughly 3, HCl is. Water gets more acidic and loses pH in the range of 4-5 when HCl is added to it.

A substance's pH is a gauge of how basic or acidic it is. It is a measurement of the amount of H+ present in the solution. It is equivalent to the negative logarithm of the concentration of H+ ions mathematically.

A solution is acidic if its pH value is less than 7, and basic if it is greater than 7. Acids have a lower pH because they contain more H+ ions. Strong acid hydrochloric acid has a pH between 2 and 3.

Water has no charge. Water becomes acidic in pH if any acid is introduced. Therefore, if HCl is given to water, the pH of the water will change to 3-5 depending on the acid content.

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Answer:

\(T_{EQ}=37\°C\)

Explanation:

¡Hola!

En este caso, para los problemas de equilibrio térmico, consideramos que la energía liberada por la sustancia que inicialmente está caliente (agua), es absorbida por la sustancia que inicialmente está fría (alcohol); thus, we can write:

\(Q_{agua}=-Q_{alcohol}\)

La cual puede ser escrita en términos de masa, calor specifico y temperaturas:

\(m_{agua}C_{agua}(T_{EQ}-T_{agua})=-m_{alcohol}C_{alcohol}(T_{EQ}-T_{alcohol})\)

De este modo, al resolver para la temperature de equilibrio térmico, obtenemos la siguiente expresión:

\(T_{EQ}=\frac{m_{agua}C_{agua}T_{agua}+m_{alcohol}C_{alcohol}T_{alcohol}}{m_{agua}C_{agua}+m_{alcohol}C_{alcohol}}\)

Así, al reemplazar los valores en esta, obtenemos:

\(T_{EQ}=\frac{(20g)(1cal/g\°C)(40\°C)+(15g)(0.58cal/g\°C)(30\°C)}{(20g)*(1cal/g\°C)+(15g)(0.58cal/g\°C)} \\\\T_{EQ}=37\°C\)

¡Saludos!

Below is the balanced chemical equation. 1.07 103 kilograms of carbon dioxide will be created. Every balanced chemical equation adheres to the principle of mass conservation.

A chemical equation is said to be balanced if the quantity of each type of atom in the reaction is the same on both the reactant and product sides. In a balanced chemical equation, the mass and the change are both equal.

Every balanced chemical equation follows the law of conservation mass , according to the information provided.

The total number of individual atoms on the reactant side and the total number of individual atoms on the product side must match,

according to this law.

The balancing chemical for the indicated reaction equation follows:

C₃H₈+5O₂→3CO₂=4H₂O

All the substances are present in gaseous state.

By Stoichiometry of the reaction:

1 mole of propane gas produces 3 moles of carbon dioxide gas.

So, 3.65 moles of propane gas will produce =  of carbon dioxide gas.

Now, calculating the mass of carbon dioxide using equation:

3/1×3.65

=10.95

Molar mass of carbon dioxide = 44 g/mol

Moles of carbon dioxide = 24.33 mol

Putting values in above equation, we get:

10.95=Mass of carbon dioxide÷44g/mol

         =4.50×10³g

Hence, the amount of  produced in the given reaction and expressed in scientific notation is 4.50×10³

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Hope you could get an idea from here.

Doubt clarification - use comment section.

The chemical formula of mentioned substances is as follows 1) SO₃ 2) K\(^+\) and NO₃\(^-\) 3) ΔH 4) Cu 5) Hg (l) 6)ZnCl₂.

Chemical  formula is a way of representing the number of atoms present in a compound or molecule.It is written with the help of symbols  of elements. It also makes use of brackets and subscripts.

Subscripts are used to denote number of atoms of each element and brackets indicate presence of group of atoms. Chemical formula does not contain words. Chemical formula in the simplest form  is called empirical formula.

It is not the same as structural formula and does not have any information regarding structure.It does not provide any information regarding structure of molecule as obtained in structural formula.

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The density of the solid is  6.724 g/ml.

Density is the number of factors which can be people, animals, vegetation, or objects in a sure place. To calculate density, you divide the number of objects by the dimension of the place. The populace density of a rustic is the wide variety of human beings in that us of a divided by means of the location in square kilometers or miles.

The density of an amount to being counted is its mass divided by means of its quantity. it also includes measured at zero °C and at 1 atmosphere of stress. Density is vital in figuring out the buoyancy of materials in fluids, as well as in evaluating materials and other measurements.

The density of an object is certainly one of its maximum crucial and easily-measured physical properties. Densities are extensively used to perceive natural substances and to represent and estimate the composition of many varieties of combos.

density = mass/ volume

      = 975g/145ml

      = 6.724 g/ml

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Answer:

VC = 18

Explanation:

Since L is the midpoint and you have LV, you know that LC is also 9.

Answer:

Digestive

Explanation:

Answer:

the answer is  D

Explanation:

brainliest?

Answer: 1.2 M

Explanation:

molarity = (moles of solute)/(liters of solution) = 2.4 / 2.0 = 1.2 M

Answer:

The molecules cannot be compared without knowing the mass.

Answer:

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Answer:

B. Hypothese

Explanation:

Answer:

B.Hypothese

Explanation:

i don't know but that's first came in my mind

From september 1 to june 1, the number of daylight hours observed each day in new york state will be option A: Decrease only.

The number of daylight hours observed each day in New York State will go down. This is due to the earth's tilt on its axis and its orbit around the sun, which causes the amount of daylight to change throughout the year.

In the northern hemisphere, the fall and winter months have shorter daylight hours than the spring and summer months. On September 1st, it is the start of fall, which means the days will start getting shorter.

Therefore, As we move towards June 1st, the days will continue to get shorter until we reach the shortest daylight hours of the year on the winter solstice (around December 21st or 22nd), after that the days will start getting longer again.

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Carbon monoxide is the byproduct of fuel combustion that may result in death if such combustion equipment is not properly vented and is denoted as option D.

This is a compound which is derived from the combustion of carbon in insufficient supply of oxygen. Carbon monoxide when inhaled replaces the oxygen content in the body which is dangerous because oxygen is needed for the survival of the cells of the body.

The carbon monoxide is usually formed when there is no properly vent thereby resulting in insufficient supply of air. This therefore results in its presence in the body results in the death of cells of the body system.

This is therefore the reason why carbon monoxide was chosen as the most appropriate choice.

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The temperature, T2, is 359°C.

1st) We need to identify the volume and the temperature of the gas in the point A (initial state of gas) and point B (final state of gas):

- Point A:

V1= 1.65x10^3 L

T1= 43°C (316K)

-Point B:

V2= 3.30x10^3 L

T2= unknown

2nd) With the Ideal Gas Law and assuming there is no change in pressure or amount of gas in the balloon, we calculate the temperature in point B with the formula that relates temperature and volume:

It is important to use the units of the ideal gas constant, so the units must be in Kelvin (K) and liters (L). That's why the temperature (T2) it is 316 K.

3rd) Finally, it is necessary convert the Kelvin unit into Celsiud degrees:

So, the temperature, T2, is 359°C.

Answer:A - The Moon Takes Longer To Rotate Than To Revolve Around Earth

Answer: The pressure of the gas is 0.34 atm

Explanation:

According to ideal gas equation:

\(PV=nRT\)

P = pressure of gas = ?

V = Volume of gas = 605 ml = 0.605 L      (1L=1000ml)

n = number of moles  = 0.00803

R = gas constant =\(0.0821Latm/Kmol\)

T =temperature =\(39^0C=(39+273)K=312K\)

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

\(P=\frac{0.00803\times 0.0821 L atm/K mol\times 312K}{0.605L}=0.34atm\)

The pressure of the gas is 0.34 atm

Formula of hydrated sodium carbonate : Na₂CO₃.10H₂O, so moles of water in one mole of hydrated salt = 10

Hydrate is a compound that binds water (H₂O), usually in the form of crystals/ solids

If these compounds are dissolved in water or heated, the hydrates can decompose:

Example: X.YH₂O (s) → X (aq) + YH₂O (l)

The formula for the hydrated compound contains: YH2O

The mole ratio shows the ratio of the coefficients of the hydrate compound

10.45 hydrated sodium carbonate(Na₂CO₃.xH₂O) were heated until 3.87 of 3.87of anhydrous (Na₂CO₃) remained, so

mass H₂O released :

\(\tt 10.45-3.87=6.58~g\)

mass Na₂CO₃ = 3.87 g

mol ratio Na₂CO₃(MW= g/mol) : H₂O(MW=18 g/mol) =

\(\tt \dfrac{3.87}{105,9888}\div \dfrac{6.58}{18}=0.0365\div 0.3655=1\div 10\)

The change described in the process of reconstituting frozen orange juice is a physical change. A physical change refers to a transformation that affects one or more physical properties of a substance, such as its size, shape, or state, without altering its chemical composition.

Adding water to frozen orange juice to reconstitute it causes a change in its volume, but it does not create new substances or cause a chemical reaction. Therefore, it is considered a physical change. Other examples of physical changes include cutting an apple, melting ice, and boiling water.

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Answer:

B

Explanation:

The following characteristics do all unicellular organisms share is all unicellular organisms have a nucleus. Hence option B is correct.

Nucleus is defined as an organelle with two membranes that houses the genetic material and other instructions needed for cellular functions. The nucleus carries the genes, which are the structures that house the hereditary information, and governs and regulates the functions of the cell. The nucleus functions as the cell's control center and genetic information store by containing the genome.

Unicellular organisms are defined as an organism made up of a single cell in which all of the body's functions, including reproduction, eating, digestion, and excretion, take place. Even though they exist on their own, unicellular creatures play a crucial part in the environment.

Thus, the following characteristics do all unicellular organisms share is all unicellular organisms have a nucleus. Hence option B is correct.

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Answer:

C - 2 e- → C

Explanation:

2 NaHCO3 → 2 Na + H2O + -1 CO + 3 CO2

2 NaI + 2 e- → 2 Na0

C - 2e - C