Ethane is a hydrocarbon with a formula of C2H6 . How many Carbon and Hydrogen atoms are contained within 3 molecules of ethane ?

A gray element that borders on the zigzag line of the periodic table, is ductile and malleable, but is not a very good conductor of heat or electricity is known as metalloid. The correct option is option C.

In chemistry, a periodic table is an orderly arrangement of each of the chemical elements along order of atomic number is, the total amount of protons inside the atomic nucleus.

Whenever the chemical elements stand grouped in this manner, there is a recurrent pattern in their characteristics known as the "periodic law," in which elements within a single column (group) exhibit comparable qualities. A gray element that borders on the zigzag line of the periodic table, is ductile and malleable, but is not a very good conductor of heat or electricity is known as metalloid.

Therefore, the correct option is option C.

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The substance known as "desflurane," a halogenated ether, is frequently used as an anesthetic.

One of the more popular anesthetic gases, nitrous oxide has been in use for about 200 years. This substance, in contrast to several other anesthetics, can be used to both cause unconsciousness and manage pain. Compared to ether, chloroform is more poisonous and strong.

General anesthesia is most frequently used for major operations, such as knee and hip replacements, heart surgeries, and many sorts of surgical procedures to cure cancer, even though there are many different types and degrees of anesthetic drugs to keep you from feeling pain during surgery.

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Based on the mass of 1 mole of nitrogen atoms, 7.55 x 10²³ atoms of nitrogen have a mass of 17.56 grams.

The number of atoms in 1 mole of nitrogen = 6.02 * 10²³ atoms

The mass of 1 mole of atoms of nitrogen = 14 g

Hence, 6.02 * 10²³ atoms has a mass of 14.01 g

Mass of 7.55 x 10²³ atoms = 14.01 g/mol * 7.55 x 10²³ / 6.02 * 10²³

The mass of 7.55 x 10²³ = 17.56 g

So,7.55 x 10²³ atoms of nitrogen have a mass of 17.56 grams.

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Answer:

the ruling party if The People's Republic of China

Explanation:

Known as CCP, founded in 1921

Answer:

The Communist Party of China, often referred to as the Communist Party or Party in mainland China, is the ruling party of the People's Republic of China and the second largest political party in the world. The current General Secretary of the 19th CPC Central Committee is Xi Jinping. The party was founded in the period of the Republic of China, led by Chen Duxiu and Li Dazhao. It was founded in August 1920 and called itself the Socialist Party. On July 23, 1921, the Communist Party was formally established. In 1922, it joined the Comintern to receive guidance and assistance, and cooperated with China The Kuomintang cooperated and jointly launched the National Revolutionary Movement. After the collapse of the first Kuomintang-Communist cooperation in 1927, the two parties engaged in a 10-year military struggle. Since the 1930s, the Communist Party of China has gradually shaken off the influence of the Comintern, and has been replaced by a local faction headed by Mao Zedong. Subsequently, in 1931, China's first communist regime established and ruled by the Communist Party was established.

Explanation:

Answer:

Follows are the solution to these question:

Explanation:

Given equation:

\(N_2+3H_2 \longrightarrow 2NH_3\)

In this equation:

\(1 N_2\) gives \(= 2NH_3\)

so,

\(3N_2\) gives=  \(2 \times 3 = 6 NH_3\)

similarly:

\(3H_2\) gives \(= 2NH_3\)

So, \(6H_2\) gives = \(\frac{2}{3}\times 6=4NH_3\)

Its limited reagent is =\(N_2\)

The amount of \(NH_3\) molecules were formed = 4.

and the amount of  \(H_2\) excess molecules are= 1

Answer:

In this experiment, the amount of ice is the independent variable, and the temperature change is the dependent variable.

Answer:

A. Element

B. Compound

C. Compound

D. Element

E. Compound

F. Compound

Explanation:

Elements are what is already on the periodic table and compounds are the substances created when they are combined.

Answer:

I think it A but im not 100%.

Explanation:

(c) Metalloids are characteristics of shiny ,brittle ,malleable or ductile.

A metalloid is a type of chemical element which has a preponderance of properties in between, or that are a mixture of, those of metals and nonmetals.

e.g  Boron, germanium, silicon, antimony, arsenic, tellurium and pollanium

Properties of Metalloids:

      Physical Properties  of metals:

 Chemical Properties:

        \(\rm 2\;Mg\;+\;O_2\;\rightarrow\;2\;MgO\)

         \(\rm Mg\;+\;2\;HCl\;\rightarrow\;MgCl_2\;+H_2\)

       \(\rm Al\;+\;NaOH\;\rightarrow\;NaAlO_2\;+\;H_2\)

Thus, the properties of metals can be known.

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Answer:

think I did this before and its V

Answer:

Cosmology is a branch of astronomy that involves the origin and evolution of the universe, from the Big Bang to today and on into the future. According to NASA, the definition of cosmology is "the scientific study of the large scale properties of the universe as a whole."

Answer:

The right one.

Explanation:

The right one looks like it is getting the most sun.

A sample of an unknown volatile liquid was injected into a Dumas flask ( mflask =27.0928g. Vflask=0.104L)  and heated until no visible traces of the liquid could be found. The flask and its contents were then rapidly cooled and reweighed  (mflask+vapor=27.4593g) . The atmospheric pressure and temperature during the experiment were 0.976 atm and 18.0 °C, respectively. The unknown volatile liquid was ________

Answer:

The unknown volatile liquid that has an approximate value of a molar mass of 86.23 g/mol is Hexane ( C₆H₁₄)

Explanation:

From the above given question:

the mass of the liquid = mflask+vapor -  mflask  

the mass of the liquid = 27.4593g - 27.0928g  = 0.3665 g

The volume of the Dumas Flask = 0.104 L

The pressure of the Dumas Flask = 0.976 atm

The temperature of the Dumas Flask = 18.0°C = (18 + 273) = 291 K

Using Ideal gas equation:

PV = nRT

0.976 atm × 0.104 L = n ×  0.08205 L atm /mol/K × 291 K

n = (0.976 atm × 0.104 L )/ ( 0.08205 L atm /mol/K × 291 K)

n = ( 0.101504  atm L)/ 23.87655 L atm /mol)

n = 0.004251 mol

We know that ;

number of moles = mass/molar mass

∴

0.004251 mol = 0.3665 g/molar mass

molar mass = 0.3665 g / 0.004251 mol

molar mass = 86.23 g/mol

The unknown volatile liquid that has an approximate value of a molar mass of 86.23 g/mol is Hexane ( C₆H₁₄)

Answer:

1.09

Explanation:

Keep in mind that the volume of the solution changes during this titration, so to compute the amount of hydronium that is neutralized during this addition of base (in order to calculate the final pH of the solution), we must calculate the moles of all species in solution initially present. Because both NaOH and HCl ionize completely:initial mol OH−=mol NaOH=(0.0050 L)(0.10 molL)=0.00050 mol OH−initial mol H3O+=mol HCl=(0.050 L)(0.10 molL)=0.0050 mol H3O+The acid is in excess, so all of the OH− present will neutralize an equivalent amount of H3O+, forming water. Thus we simply subtract the moles of hydroxide from the moles of hydronium in solution to find the resultant moles of H3O+ after this neutralization:final mol H3O+= initial mol H3O+−initial mol OH−final mol H3O+=0.0050 mol−0.00050 mol=0.0045 mol H3O+We now calculate the total volume of the solution by adding the volumes of acid and base initially combined: 0.050 L+0.0050 L=0.055 LTo get [H3O+], we divide the final moles of hydronium by the final solution volume:[H3O+]=final mol H3O+ total volume=0.0045 mol0.055 L≈0.08181molLFinally, to find pH:pH=−log[H3O+]=−log(0.08181)=1.09Since the hydronium concentration is only precise to two significant figures, the logarithm should be rounded to two decimal places.

Answer: But when it comes to the word atom, we have to go to ancient Greece of 400 B.C. And there was a brilliant philosopher named Democritus, and he proposed the Greek word atomos, which means uncuttable. And so as he explained, all matter was eventually reducible to discrete, small particles or atomos.

Explanation:

Answer:

indivisible

Explanation:

Answer:d

Explanation:

Answer:

HfCl3

Explanation:

Step 1:  Find the compounds relative atomic mass

Step 2: Divide the percentage given by the relative atomic mass

Hf = 62.2/178.5         CI = 37.4/35.5

  Hf = .348                 CI = 1.054

Step 3: Divide every given number by its lowest ratio. (0.348)

Hf - .348/.348          CI - 1.054/.348

    Hf= 1                           CI = 3

This means, the empirical formula for this compound would end up being

HfCI3.

Hope this helps!

Light energy travels in the form of waves.

Answer:

0.86

Explanation:

1mol of Zn has mass of 65.39g.The amount of Zn is 2.5g65.39g/mol=0.038mol.

The amount of H2 produced is the same as the amount of Zn consumed (0.038mol).

1mol of ideal gas will occupy 22.4L at STP.

The H2 will occupy 0.038mol×22.4L/mol=0.86L

.

Given the balanced equation:

• 2 NH₃(g) + 3 CuO(s) → 3 Cu(s) + N₂(g) + 3 H₂O(g)

0. The coefficients tell you the mole ratios, so 2 moles ammonia (NH3) will react with 3 moles of copper(II) oxide, (CuO).

1. We will set up a simple proportion in order to solve this , as follows:

• 2 mol NH3/3 mol CuO = x mol NH3/0.876mol CuO.

→0.876molCuO * 2molNH3/3molCuO=0.584 molesNH3

• This means that 0.584 moles of Ammonia, would be required to react exactly with 0.876 moles of copper(II) oxide.

Answer:

Explanation:

A compound is a substance made up of two or more distinct elements that are chemically linked to one another in chemistry. These components mix in predetermined ratios to produce a special set of attributes that are distinct from those of the individual components. Chemical reactions such as combination, breakdown, or exchange reactions can all result in the formation of compounds. Water (H2O), sodium chloride (NaCl), and carbon dioxide (CO2) are a few examples of compounds. Chemistry is based on the understanding of the composition and behavior of compounds, which is essential for many applications in science and technology.

All three statements are true:

Answer: c) \(2\text{Na}_{3}\text{PO}_{4}+3\text{CaCl}_{2} \longrightarrow 6\text{NaCl}+\text{Ca}_{3}\text{(PO}_{4})_{2}\)

Answer: Positive ions or cations

Explanation:

The ions are formed when an atom gains or lose electrons.

The ions are classified into two which are called the cations and anions. The cation is classified as the positive charge formed by the loss of electrons. Example: \(Na^+\) is formed by the loss of one electron by \(Na\)

The anion is classified as the negative charge ion formed by the gain of electrons. Example : \(F^-\) is formed the gain of one electron by \(F\)

Thus when an element loses electrons, it forms positive ions or cations.

The SO2 Lewis structure would consist of two oxygen (O) atoms and one sulfur atom.

Both the sulfur and oxygen atoms have six reactivity electrons. The molecular geometry of sulfur dioxide is a bent form. The sulfur-to-oxygen ratio in sulfur dioxide. Sulfur dioxide and SiCl4 have 1 lone pair and 2 bond pairs.SO2 molecular addition is considered to V-shaped or bent. otherwise, the electron geometry of sulfur dioxide is in the shape of a trigonal planar. The three pairs of bonding electrons lie at an angle of 119o.

The bond sequence and 1.2 in SO2 and the sulfonyl group, separately. Thus, electrostatic forces (and not multiple covalent bonding) give more to the SÀO bond shortening. In the SO2 lewis structure, there are two double bonds linking the sulfur atoms and oxygen atoms. The sulfur dioxide lewis structure is drawn step by step using VESPR

So we can conclude that The electron dot form of the SO2 molecule is also known as the SO2 Lewis structure.

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Answer: The volume of 0.300 M NaF required is 59.6 ml

Explanation:

According to the dilution law,

\(C_1V_1=C_2V_2\)

where,

\(C_1\) = concentration of concentrated NaF solution = 0.300 M

\(V_1\) = volume of pure concentrated Na F solution = ?

\(C_2\) = concentration of diluted NaF solution= 0.0715 M

\(V_2\) = volume of diluted NaF solution= 250.0 ml

\(0.300\times x=0.0715\times 250.0\)

\(x=59.6ml\)

Thus the volume of 0.300 M NaF required is 59.6 ml

Heat transferred is already given in the question

Answer:

Parasites take nutrients from another organism's body.

Explanation:

Now

No of molecules:

\(\\ \sf\longrightarrow No\:of\;moles\times Avagdro\:no)\)

\(\\ \sf\longrightarrow 3(6.022\times 10^{23})\)

\(\\ \sf\longrightarrow 18.066\times 10^{23}\)

\(\\ \sf\longrightarrow 1.8066\times 10^{22} molecules \)