How much heat is required to cause 15g of liquid water at its boiling point to become a gas?

The substances' sodium (Na), oxygen (O2), and sodium oxide (Na2O) participate in this chemical reaction. 4Na + O2 = 2Na2O is the reaction between Na and O2. The suitable sentence is Sodium oxide is created by the chemical reaction.

A chemical reaction is a process that converts one or more substances, known as reactants, into one or more different substances, known as products. Chemical elements or compounds are examples of substances.

Because Na and O are not balanced, the balanced equation by hit and trial will be: 4Na+O2Na2O.

A chemical reaction occurs when two or more compounds or substances undergo chemical transformation to form new compounds or substances. Chemical equations express chemical reactions using symbols and chemical formulas of the compounds involved.

Thus, option B is correct.

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Answer:

C

Explanation:

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Answer:

its b.

Explanation:

Answer:17

Explanation:NH3 = 14 + 3 = 17 g/mole.

"Option C" O¹⁵8 and O¹⁶8 atoms represent different isotopes of the same element.

Hope it helps...

Answer: D

Explanation: for question 2 the answer is D and for 3 it is A. That is very easy and the muscular systen has nothing to do with breathing.

Answer:

2: d

3: b

i think, im not too sure

1) Diesel has a higher viscosity than petrol.

2) Petrol is more flammable than diesel.

3) The formula will be C₁₀H₂₂.

4) The equation is; 2C8H18+25O2→16CO2+18H2O.

Depending on the precise composition and temperature, the viscosity of gasoline and diesel can change. In general, diesel is more viscous than gasoline. Higher viscosity fluids are thicker and flow more slowly than lower viscosity fluids because viscosity relates to the resistance of a fluid to flow.

Diesel is less flammable than gasoline. The lowest temperature at which gasoline can evaporate and turn into an ignitable combination in air is known as its flash point, and it is lower for gasoline. Compared to diesel fuel, petrol vapors are much more flammable and can ignite at lower temperatures.

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The chemical D is  FeSO4 · 7H2O which is a green crystalline solid. When dissolved in water it gives a very pale green solution. The chemical E is Fe(OH)3 which is reddish brown in color. The chemical F is BaSO4 which is white in color.

D =  FeSO4 · 7H2O hydrated ferrous sulfate.

E = Fe(OH)3 ferric hydroxide

F= BaSO4  barium sulphate

A chemical response happens while one or extra chemical substances are modified into one or extra different chemicals. For Example iron and oxygen combine to make rust. vinegar and baking soda combine to make sodium acetate, carbon dioxide, and water. techniques concerning the atomic nucleus are called nuclear reactions. The substances that participate in a chemical reaction are known as reactants.

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Answer:

Exothermic Reaction

Product  = Calcium hydroxide + hydrogen

Explanation:

In 15.0 mL of a 2.5 molar magnesium chloride solution, there are approximately 4.51 × 10^{22} chloride ions.

An inorganic compound composed of one magnesium ion and two chloride ions.

We must first determine the number of moles of MgCl_2 in the solution,

moles of solute = concentration × volume (in liters)

Converting the solution's volume from milliliters to liters,

15.0 mL = 15.0 × 10^{-3} L

moles of MgCl_2 = 2.5 mol/L × 15.0 × 10^{-3} L = 0.0375 moles

The solution contains the following number of chloride ions:

number of Cl^{-} ions = 2 × moles of MgCl_2

Substitute the value of moles of MgCl_2,

number of Cl^{-} ions = 2 × 0.0375 moles = 0.075 moles

by using Avogadro's number:

number of Cl^{-} ions = 0.075 moles × 6.02 × 10^{23} ions/mol ≈ 4.51 × 10^{22} ions

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Answer: 380 J. Please mark

Explanation:

The required partial pressure of argon gas present in the mixture is 1.02 atm.

Dalton's law of gas states that total pressure of any mixture of gas is sum of the partial pressure of all the gases present in that mixture.

Given that,

Total pressure of mixture = 2.4 atm

Partial pressure of argon = ?

Partial pressure of oxygen = 128 mmHg = 0.168 atm

Partial pressure of helium = 167.5 mmHg = 0.220 atm

Partial pressure of neon = 760 mmHg = 1 atm

On putting all these values according to the definition we get the partial pressure of argon gas as:
Partial pressure of argon = 2.4 - (0.168 + 0.22 + 1) = 1.02 atm

Hence required partial pressure of argon gas is 1.02 atm

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Answer

One of them is a Solid and one of them is a liquid and the other one is air

Explanation:

Answer:

Explanation:

The pH of 0.02 M hydrochloric acid is approximately 1.7.

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To graph the function g(x) = f(-x), you can start with the graph of f(x) and then reflect it about the y-axis.

To find the graph of the function g(x) = f(-x), we can start with the graph of the function f(x) and then reflect it about the y-axis.

If the graph of f(x) is symmetric with respect to the y-axis, meaning it is unchanged when reflected, then g(x) = f(-x) will have the same graph as f(x).

However, if the graph of f(x) is not symmetric with respect to the y-axis, then g(x) = f(-x) will be a reflection of f(x) about the y-axis.

In either case, the resulting graph of g(x) = f(-x) will be symmetric with respect to the y-axis.

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The mole ratio of the given reaction is 1 mole HF/1 mole HCI; option A.

Mole ratios are ratios of the moles of reactants and products in a balanced chemical equation of a reaction.

Mole ratios are obtained from balanced chemical equations.

The balanced equation of the reaction is given below:

The mole ratio of the given reaction is 1 mole HF/1 mole HCI.

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The mass of the asteroid is C. 1.2 x \(10^{12}\) Kg

To find the mass of the other asteroid, we can rearrange the equation for the gravitational force between two objects:

F = (G * m1 * m2) / \(r^{2}\)

where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the two asteroids, and r is the distance between them.

Given that the distance between the asteroids is 75000 m, the force of gravity between them is 1.14 N, and one asteroid has a mass of 8 x \(10^{7}\) kg, we can substitute these values into the equation and solve for the mass of the other asteroid (m2):

1.14 N = (6.67430 × \(10^{-11}\) N \(m^{2}\)/\(Kg^{2}\) * 8 x \(10^{7}\) kg * \(m2\)) / \((75000 m)^{2}\)

Simplifying and solving the equation, we find that the mass of the other asteroid (m2) is approximately 1.2 x \(10^{12}\) kg. Therefore, Option C is correct.

The question was incomplete. find the full content below:

Two asteroids are 75000 m apart one has a mass of 8 x \(10^{7}\) kg if the force of gravity between them is 1.14 what is the mass of the asteroid

A. 3.4 x \(10^{11}\) kg

B. 8.3 x \(10^{12}\) kg

C. 1.2 x \(10^{12}\) kg

D. 1.2 x \(10^{10}\) kg

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The balanced chemical equation is AlI₃(s) + 3 K(s) → 3 KI(s) + Al(s). The number of moles of aluminium will be 2.437moles.

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Resonating structures are those created when the delocalized electron exhibits movement-contributing properties. An illustration of resonance is benzene.

The electronic bonding of a single polyatomic species, including fractional bonds and fractional charges, is described by resonance structures, which are a collection of two or more Lewis structures.When specific conditions are satisfied, resonance can happen in an object. The object's vibrational frequency must be at least one natural frequency. There must be an external force that propels the object.

When the bonding between two polyatomic ions or certain molecules cannot be described by a single Lewis formula, resonance is a means to describe the delocalized electrons inside those molecules or ions. Many contributing structures can be used to describe a molecule or an ion with such delocalized electrons also called resonance structures.

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The complete question is

Identify which one of the following is a resonance structure of the structure in the box: A)I B) II C) III D) IV

Answer:

125.4 kilopascals

Explanation:

wkdje

Answer:

125,400 pa = 125.4 kPa

Explanation:

1 pa = 0.001 kPa

&

1 kPa = 1,000 pa

Answer:

helium

Explanation:

remaining three are efficient gas

Among the options given below, helium is not an efficient greenhouse gas. Thus, the correct option for this question is A.

Greenhouse gases are those gases that significantly allow solar radiation in order to enter but prevent the escape of heat radiations of longer wavelengths. The names of common greenhouse gases are carbon dioxide, methane, nitrous oxide, CFCs, etc.

According to the context of this question, the presence of these gases in the atmosphere is responsible for the phenomenon of keeping the earth warm. This is known as Greenhouse effect. These gases stimulate the phenomenon of global warming.

Therefore, among the options given below, helium is not an efficient greenhouse gas. Thus, the correct option for this question is A.

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Answer:

I would say it is true

Explanation:

The sum of the bond dissociation energies of the product molecules is equal to the sum of the bond dissociation energies of the reactant molecules.

define bond dissociation energies ?

The conversion factor 23.060 kcal/mol (96.485 kJ/mol) for each eV may be used to translate a molar BDE to the energy required to dissolve the bond per molecule.

Bond dissociation energy values have been measured using a variety of experimental techniques, including spectrometric determination of energy levels, radical generation via pyrolysis or photolysis, chemical kinetics and equilibrium measurements, and various calorimetric and electrochemical methods. Nonetheless, bond dissociation energy measurements are difficult and vulnerable to significant error. The bulk of currently known values are within 1 or 2 kcal/mol (4-10 kJ/mol) of being correct. Furthermore, values measured in the past, particularly prior to the 1970s, can be unreliable and have been subject to revisions of the order of 10 kcal/mol.

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One benefit of asexual reproduction is that it is efficient and fast because one organism is involved. ⇒ True

Binary fission is the process of splitting into two identical organisms.⇒ True

The term reproduction is defined as the production of offsprings. There are two types of reproduction. 1. Sexual reproduction 2. Asexual reproduction.

Budding involves a hydra budding an identical right off themselves.⇒ False

Sexual reproduction involves the uniting of gametes. ⇒ True

Sperm and egg cells have 20 chromosomes.⇒ False

One benefit of sexual reproduction is genetic diversity.⇒ True

Genetic variety can exist in a population of grasshoppers due to asexual reproduction.⇒ False

Thus, One benefit of asexual reproduction is that it is efficient and fast because one organism is involved. ⇒ True

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Answer:

101

Explanation:

Provided that

\(S_1 = S_2 = same\ V_{max}\)

And,

\(S_1\ k_M = 2.0mM\\S_2\ k_M = 20mM\)

Now we expect the same

{S} (0.1mM)

This determines that \(S_1\) generates a  higher rate of product formation as compared to the \(S_2\)

So we can easily calculate the \(V_{max}\) for either of \(S_1\) or \(S_2\) as we know that Tube 1 is \(S_2\) and tube 2 is \(S_1\)

As we know that

\(V_0 = V_{max}\ {S} / (K_M + {S})\)

As the rates do not include any kind of units so we do not consider the units for \(V_{max}\)

Now the calculation is

\(0.5 = V_{max} (0.1\ mM) / (20\ mM + 0.1\ mM)\)

\(V_{max} = 0.5 (20.1\ mM) / 0.1\ mM\)

= 100.5

≈ 101

Answer:

He chose pea plants because they were easy to grow, could be bred rapidly, and had several observable characteristics, like petal color and pea color.

Explanation:

Answer:

55.9 kPa

Explanation: