How do valence electrons impact the type of bonds an atom makes?

An atom wants an empty outer shell of valence electrons, so it will either transfer or share electrons depending on what the other atom needs.
A large number of valence electrons means the atom will share electrons; a small number of valence electrons leads to transferring from one atom to another.
A small number of valence electrons means the atom will share electrons; a large number of valence electrons leads to transferring from one atom to another.
An atom wants a full outer shell of valence electrons, so it will either transfer or share electrons depending on what the other atom needs.

Use your knowledge of valence electrons and how they affect bonds to figure out how carbon (Group 14) and oxygen (Group 16) would be attached to one another. In carbon dioxide (CO2), how is the compound structured? (Use “–” to represent a single bond and “=” to represent a double bond.)(1 point)
O=C=O
C=O–O
C–O–O
O=C–O

Methane’s chemical formula is CH4. Is there a bond between any of the hydrogen atoms? Why or why not?
Yes, there is because there are one too many hydrogen atoms for carbon to handle alone, so one hydrogen must bond with another.
No, there is not because carbon needs four bonds, so it bonds with each hydrogen atom; hydrogen only forms one bond.
No, there is not because it would form H2 instead of methane if hydrogen bonded with itself.
Yes, there is because they form a long chain in order to all have stable outer energy shells.

In hydrogen peroxide (H2O2), which option best shows how the atoms are ordered?
H–O–O–H
O–H–H–O
H–O–H–O
O–H–O–H

Answer:

Molar mass of the unknown gas is 8.96g/mol

Explanation:

Hello,

According to Graham's law of diffusion, its states that the rate of diffusion of a gas is inversely proportional to the square root of its molecular mass

R = k (1/√(M))

R = rate of diffusion

M = molecular mass

R₁ / R₂ = √(M₂ / M₁)

R₁ = nitrogen = 68.3s

R₂ = unknown gas = 85.6s

M₂ = molecular mass of the unknown gas

M₁ = molecular mass of nitrogen = 14g/mol

68.3 / 85.6 = (√M₂ / 14)

0.8 = (√M₂ / 14)

Take square of both sides

0.8² = M₂ / 14

M₂ = 14 × 0.64

M₂ = 8.96g/mol

The molar mass of the unknown gas is 8.96g/mol

The temperature at the top of an atmosphere consisting of an ideal gas with constant density can be found using the ideal gas law, which states that PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.

Assuming the density of the gas is constant throughout the atmosphere, we can express the pressure as P = ρgh, where ρ is the density, g is the acceleration due to gravity, and h is the height.

Since the atmosphere is homogeneous, the pressure at the top (P_top) is the same as the pressure at the bottom (P_bottom), so we have P_top = P_bottom = ρgh.

Using the ideal gas law, we can write ρghV = nRT, where V is the volume of the gas.

Assuming the volume of the gas is constant, we can cancel out V, and rearranging the equation, we get T_top = (nRT_bottom)/(nR) = T_bottom.

Therefore, the temperature at the top of the atmosphere would be the same as the temperature at the bottom.

In practice, however, it is not possible for an atmosphere to have constant density all the way to the top. As we go higher in the atmosphere, the density decreases due to decreasing pressure and temperature. This is because gravity becomes weaker at higher altitudes. Therefore, in reality, the temperature would decrease as we move higher in the atmosphere.

So, while a homogeneous atmosphere with constant density all the way to the top cannot exist in practice, it can be considered as an idealized scenario for understanding certain aspects of atmospheric behavior.

Learn more about ideal gas law, here :-

https://brainly.com/question/30458409

#SPJ11

Answer:Open this pdf if has the answers

Explanation:

Answer:

It is important to identify it because the two types of crust are made up of two different types of rock

Explanation:

Have a nice day

The boiling point of water is dependent on the pressure exerted on the liquid. In this case, water boils at 90°C when the pressure exerted on the liquid equals 101.3 kPa, which is equivalent to atmospheric pressure. At different pressures, the boiling point of water will vary.

The boiling point of a substance is the temperature at which its vapor pressure equals the external pressure exerted on the liquid. When the external pressure is equal to the vapor pressure, the liquid starts to vaporize and boil.

In the given options, the pressure values are provided, and we need to determine which pressure corresponds to the boiling point of water at 90°C.

At standard atmospheric conditions, the pressure is approximately 101.3 kPa, which is equivalent to 1 atmosphere (atm) or 760 mmHg. This is also known as the normal boiling point of water, where water boils at 100°C.

Based on this information, we can conclude that option (3) 101.3 kPa is the correct choice. At this pressure, water boils at 90°C.
Therefore, the boiling point of water is affected by the pressure exerted on the liquid, and at 101.3 kPa, water boils at 90°C. At higher pressures, such as option (4) 120 kPa, water would boil at a higher temperature, and at lower pressures, such as options (1) 65 kPa or (2) 90 kPa, water would boil at a lower temperature.

Learn more about Boiling point from the given link:
https://brainly.com/question/1514229
#SPJ11

The volume of aluminum will be "26.12 cm³".

A translucent bright silvery metal from Periodic Group 13 of such periodic chart, is a Aluminum.

Aluminum is found in numerous everyday products as as kitchenware and timepieces. It is being used throughout the building industry to make doors, window frames, cables, as well as roofs.

According to the question,

We know,

The volume of substance:

= \(\frac{Mass}{Density}\)

By putting the values,

= \(\frac{70.5}{2.70}\)

= \(26.12\) cm³

Thus the response above is right.

Find out more information about volume here:

https://brainly.com/question/1529039

1. Sodium bicarbonate is added during the work-up phase because it helps in converting any residual acetic anhydride into acetic acid and neutralizes the unreacted salicylic acid.

Sodium bicarbonate is an effective pH neutralizer. In the preparation of aspirin, after the completion of the reaction, hydrochloric acid is added to lower the pH of the reaction mixture to about 2. At this point, aspirin precipitates as it is relatively insoluble in water. After filtration, the crude product is dissolved in hot water. At this stage, sodium bicarbonate is added to neutralize the acidic impurities like the acetic acid that is produced in the reaction. The impurities become soluble and easily removed from the solution.

2. The complete reaction mechanism for the preparation of aspirin is:

3. The crystals are washed with cold water during the first filtration to remove any impurities that may be present. Coldwater is used to prevent the solubility of aspirin in water. This makes it easier to remove any water-soluble impurities and unreacted salicylic acid that may be present.

4. The percent yield of the reaction is calculated by dividing the actual yield obtained by the theoretical yield that is calculated from the stoichiometry of the reactants involved in the reaction. Factors such as incomplete reactions, losses during filtration, and errors in measurement can all contribute to a lower yield. Therefore, the yield may be less than 100%.

5. The melting point of the newly synthesized aspirin should be around 136-140 °C if the reaction was successful. A lower melting point may be an indication of impurities in the final product. The impurities could be from an incomplete reaction, the presence of water or unreacted salicylic acid.

learn more about aspirin here

https://brainly.com/question/25794846

#SPJ11

The statement that best describes a buffer solution is c) Buffer resists change in pH by accepting hydrogen ions when acids are added to the solution and donating hydrogen ions when bases are added.

A buffer solution is a mixture of a weak acid and its conjugate base (or a weak base and its conjugate acid) that helps to resist changes in pH when small amounts of an acid or base are added to the solution. The weak acid and its conjugate base act together to "buffer" the solution and prevent large changes in pH.

Buffers are important in many biological, chemical, and industrial processes, where the maintenance of a stable pH is crucial. For example, buffer solutions are used in blood and other bodily fluids to regulate the pH, and in many industrial processes to stabilize the pH of process streams and effluents.

Therefore, The statement that best describes a buffer solution is c) Buffer resists change in pH by accepting hydrogen ions when acids are added to the solution and donating hydrogen ions when bases are added.

To know more about buffer solution refer to:

brainly.com/question/24262133

#SPJ4

The simple cubic unit cell of gallium contains 8 atoms.

Atoms are the fundamental units of matter, consisting of an electrically neutral nucleus with positively charged protons and electrons surrounding it. With sizes ranging from 0.1 to 0.5 nanometers (10-10 to 5x10-10 meters), atoms are very tiny.

We must first estimate the edge length of the unit cell in order to calculate the number of atoms in the simple cubic unit cell of gallium.

Since mass per unit volume is the definition of density (p), we can apply the following equation:

ρ = m / V

where V is the unit cell's volume and m is the unit cell's mass. To find V, we can rearrange this equation as follows:

V = m / ρ

When we enter the provided values, we obtain:

V = 69.72 g/mol / 5.91 g/cm3, which equals 11.8 cm3/mol.

The volume of the unit cell is easily determined because the simple cubic unit cell is made up of a single cube:

A³ = Vcell

where an is the cube's edge length. To solve for a, we obtain:

a=(Vcell)^(1/3)

  =(11.8 cm³/mol)^(1/3)

   = 2.39 cm.

A sphere with a radius of approximately 1 angstrom (1 A = 10^-8 cm) can be used to represent the volume of an atom. We can accommodate multiple atoms along each of the unit cell's 2.39 cm long edges. The number of atoms per edge is specifically determined by:

n = 2.39 cm / (2 × 1 Å) = 2.39 × 10^(-8) cm / Å

The total number of atoms in the unit cell, however, is equal to the number of corners because the unit cell only contains atoms at the corners. There is one atom at each of the eight corners of a basic cubic unit cell, for a total of:

8 atoms per cell = natom

In light of this, the simple cubic unit cell of gallium contains 8 atoms.

To know more about atom, visit:

https://brainly.com/question/1566330

#SPJ4

Answer:

Barium permanganate | Ba(MnO4)2 - PubChem.

Description: Barium permanganate appears as ...

Synonyms: BARIUM PERMANGANATE7787-3...

Molecular Formula: Ba(MnO4)2 or BaMn2O8

Molecular Weight: 375.2 g/mol

Explanation:

Answer:

it's volume also decrease

The property of matter that is conserved in chemical reactions and shown by balanced equations is known as the Law of Conservation of Mass. According to this law, mass can neither be created nor destroyed in a chemical reaction; it can only be transformed from one form to another.For instance, when two substances are combined, they react and form a new substance.

For such more question on chemical reaction

https://brainly.com/question/11231920

#SPJ8

The average atomic mass of Gallium is 69.65amu.

Average atomic mass is the weighted average of the atomic masses of the naturally occurring isotopes of an element.

According to this question, Gallium has two isotopes with the following composition:

Average atomic mass of the Gallium can be calculated as follows:

The average atomic mass of the Gallium is as follows: 45.5 + 24.15 = 69.65amu

Learn more about average atomic mass at: https://brainly.com/question/13753702

#SPJ1

The goal of these washes is to neutralize an organic layer that might contain traces of acidic components. These washes are composed of saturated sodium bicarbonate (NaHCO3) and sodium carbonate (Na2CO3) in aqueous solutions.

Sodium bicarbonate is used to extract the mixture since doing so will cause any unreacted acid to react with the sodium bicarbonate and neutralize any remaining acid. When the acid had been neutralized, the water-soluble acid would separate from the water-insoluble ester. As a result, the yield of the pure product increases.

Sodium bicarbonate, an acidifying agent, and a drying agent are all ingredients in baking powder. Starch typically serves as both the drying agent and the acidifying agent in recipes. A leavening agent is a baking powder

learn more about Sodium bicarbonate here;

https://brainly.com/question/20693952

#SPJ4

Therefore, the gas was collected at a temperature of 246 K.

It examines four straightforward techniques for gathering gases: floating over water, pouring gases into test tubes or gas jars from below, pouring gases into gas syringes from above.

We can use the ideal gas law, PV = nRT, to solve for the temperature (T) of the gas. Rearranging the equation, we get:

T = PV / nR

where P is the pressure in atm, V is the volume in L, n is the number of moles, R is the ideal gas constant (0.08206 L.atm/mol.K).

Substituting the given values, we get:

T = (0.925 atm)(3.51 L) / (1.350 mol)(0.08206 L.atm/mol.K)

T = 246 K

To know more about temperature visit:-

brainly.com/question/29072206

#SPJ9

balanced equation for complete neutralization of h2so4 by koh in aqueous solution is 2 KOH ( aq ) + H 2 SO 4 ( aq ) → K 2 SO 4 ( aq ) + 2 H 2 O ( l ) .

Because the chemical equation must obey the law of conservation of mass, balancing the stoichiometric coefficients on the reactants and products sides is referred to as Balancing equation. In an unbalanced equation, there are unequal numbers of each type of atom on the reactant and product sides. The reaction of hydrogen with oxygen to form water is an example. Hydrogen (g) + Oxygen (g) = H 2 O ( l ) Water. Because the law of conservation of mass states that mass cannot be created or destroyed, chemical equations should always be balanced.

Learn more about atom here:

https://brainly.com/question/1566330

#SPJ4

Answer:

The main function of sensory transduction is the conversion of sensory signals to chemical signals in the nervous system. Sensory transduction occurs in the sensory receptors. In sensory transduction, the sensory neurons play an important role.

Explanation:

Answer:

B

Explanation:

The pH indicator bromothymol blue is blue in alkaline solution and yellow in an acidic solution. A solution in which the color of the indicator is yellow is already acidic, hence, to change the color to blue would require that the pH of the solution is increased from acidic to basic.

Yeast cell and sugar placed in the solution will result in the fermentation and further increase the acidity of the solution.

Water plants under bright light in the solution will consume CO2 and photosynthesize, thereby reducing the acidity of the solution.

Algae placed in the solution and left in the dark room will increase the acidity of the solution as a result of further addition of CO2 through the respiration of the algae.

A person blowing air into the solution through a straw will further increase the acidity of the solution due to the CO2 content of the air blown.

Therefore, the only action that will likely reduce the acidity of the solution by increasing the pH and thus turn the color of the indicator from yellow to blue is the presence of water plants in the solution placed under a bright lamp.

Answer:

drying up

agricultural chemicals

Explanation:

8.17  is the ph at the equivalence point.

The volume of NaOH used to reach equivalence point

M(HF)*V(HF) =M(NaOH)*V(NaOH)

0.15 M *25.0 mL = 0.15M *V(NaOH)

V(NaOH) = 25 mL

Molarity of HF = 0.15 M

Volume of HF = 25 mL

Molarity of NaOH = 0.15 M

Volume of NaOH = 25 mL

mol of HF = Molarity of HF * Volume of HF

mol of HF = 0.15 M * 25 mL = 3.75 mmol

mol of NaOH = Molarity of NaOH * Volume of NaOH

mol of NaOH = 0.15 M * 25 mL = 3.75 mmol

mol of HF = 3.75 mmol

mol of NaOH = 3.75 mmol

3.75 mmol  of both will react to form F- and H2O

F- here is strong base

F- formed = 3.75 mmol

Volume of Solution = 25 + 25 = 50 mL

Kb of F- = Kw/Ka =  1*10^-14/3.5*10^-4 = 2.857*10^-11

concentration ofF-,c = 3.75 mmol/50 mL = 0.075M

F- dissociates as

F-        + H2O   ----->     HF  +   OH-

0.075                        0         0

0.075-x                      x         x

Kb = [HF][OH-]/[F-]

Kb = x*x/(c-x)

Learn more about pH:

https://brainly.com/question/12609985

#SPJ4

The correct order of the materials from the biggest to smallest size is option b, gravel, salt, soil and talcum powder.

Gravel is the aggregates of less rounded rocks. In some locations, heavy metallic ore deposits like cassiterite or native metals like gold, in the form of nuggets or flakes, can be found accumulating in gravel beds. Gravel is a common building material.

Therefore, the gravel is the biggest here. Salt in nature appears as salt rocks. Soil is some more grained. Talcum powder is very fine and tiny soft particles. Hence, talcum powder is the smallest here.

Therefore, the order of materials from biggest to smallest is option b, gravel, salt, soil and talcum powder.

Find more on talcum powder :

https://brainly.com/question/29940887

#SPJ1

Answer:

Match the celestial bodies with their descriptions.

meteorite

asteroid

meteor

comet

an object from space burning up as

it enters the atmosphere of a planet

arrowRight

a small body in space, usually composed

of rock or metal

arrowRight

an object from space that falls to the

surface of a planet without completely

burning up

arrowRight

a body made mainly of ice and dust

that leaves a trail of dust known as

a tail as it approaches the Sun

arrowRight

Explanation:

Answer:

Explanation:

At a constant temperature, the pressure of gas will increase proportional to the decrease in volume of the gas.

P1V1= P2V2

Decrease in volume result in increase in pressure as the equation has to hold true.

The coefficient of water in the balanced equation is 7.  Option C is correct.

Balanced chemical equation for the given reaction in acidic solution is;

NH₄⁺(aq) + Cr₂O₇²⁻(aq) + 14H⁺(aq) → Cr³⁺(aq) + N₂(g) + 12H₂O(l)

To balance the equation, we start by balancing the oxygen atoms by adding water molecules to the appropriate side;

NH₄⁺(aq) + Cr₂O₇²⁻(aq) + 14H⁺(aq) → Cr³⁺(aq) + N₂(g) + 7H₂O(l)

Now, we balance the hydrogen atoms by adding H+ ions to the appropriate side;

NH₄⁺(aq) + Cr₂O₇²⁻(aq) + 14H⁺(aq) → Cr³⁺(aq) + N₂(g) + 7H₂O(l)

Finally, we balance the charge by adding electrons to the appropriate side;

NH₄⁺(aq) + Cr₂O₇²⁻(aq) + 14H⁺(aq) → Cr³⁺(aq) + N₂(g) + 7H₂O(l) + 14e⁻

Therefore, the coefficient of water is 7.

Hence, C. is the correct option.

To know more about coefficient here

https://brainly.com/question/22241464

#SPJ4

The pressure exerted on the floor by the woman's heel is approximately 54.6 pounds per square inch.

To calculate the pressure exerted on the floor by the heel, we need to use the formula:

Pressure = Force / Area

First, we need to find the force exerted by the woman's heel. Force is equal to the mass multiplied by the acceleration due to gravity. The acceleration due to gravity is approximately 9.8 m/s^2.

Force = mass * acceleration due to gravity
Force = 63.5 kg * 9.8 m/s^2
Force = 622.3 N

Next, we need to convert the area from cm^2 to m^2. Since 1 m = 100 cm, the area in m^2 is:

Area = 1.65 cm^2 / (100 cm/m)^2
Area = 0.00165 m^2

Now we can calculate the pressure:

Pressure = Force / Area
Pressure = 622.3 N / 0.00165 m^2
Pressure ≈ 376,848.5 Pa

To convert from Pascals (Pa) to pounds per square inch (psi), we can use the conversion factor:

1 psi = 6894.76 Pa

So, the pressure exerted on the floor by the woman's heel is approximately:

Pressure ≈ 376,848.5 Pa / 6894.76 Pa/psi
Pressure ≈ 54.6 psi

Therefore, the pressure exerted on the floor by the woman's heel is approximately 54.6 pounds per square inch.

Learn more about acceleration from the following link:

https://brainly.com/question/460763

#SPJ11

The particular significance of valence electrons is - 2) Valence electrons form chemical bonds between atoms by being transferred or shared.

A valence electron is an electron that is part of an atom's outer shell and can take part in the synthesis of a chemical bond if the outer shell is open. Each atom in the bond contributes one valence electron, forming a shared pair in a single covalent bond. Atoms are bound together by attractive forces called chemical bonds. Valence electrons, which make up an atom's outermost electronic "shell," interact to form bonds. Covalent bonds are the bonds in which the valence electron density is shared by the two atoms. They are formed between atoms with equal or similar electronegativity.

Valence electrons are exchanged between atoms, usually a metal and a nonmetal, to create ionic bonds. Ions can follow the octet rule and become more stable when one or more of their valence electrons are lost or gained. Ions therefore interact in ways that balance their charges. Chemists examine the exchange or sharing of electrons during chemical reactions. The valence electrons that are lost, gained, or shared are those electrons.

Here is more information on valence electrons: brainly.com/question/371590

#SPJ4

The pH of the resulting solution is 10.50 that results from mixing 44.3 ml of 0.24 m dimethylamine ((ch3)2nh) with 34.3 ml of 0.14 m (ch3)2nh2cl. the kb value for (ch3)2nh is 5.4 x 10-4.

To calculate the pH, we need to first calculate the concentration of the resulting solution using the following formula: \(c1v1 + c2v2 = c3v3\)

where c1 and v1 are the concentration and volume of dimethylamine, c2 and v2 are the concentration and volume of dimethylammonium chloride, and c3 and v3 are the concentration and volume of the resulting solution.

After calculating the concentration of the resulting solution, we can use the Kb value to calculate the pOH, and then use the formula pH + pOH = 14 to obtain the pH.

In this specific case, the pH is 10.50, indicating that the solution is slightly basic.

The mixing of dimethylamine and dimethylammonium chloride generates an equilibrium reaction between the two compounds. The resulting solution is a buffer solution that can resist changes in pH. The Kb value for dimethylamine can be used to calculate the concentration of hydroxide ions in the solution.

learn more about pH here:

https://brainly.com/question/15289714

#SPJ11

The expression 78.3 kJ in the thermochemical equation represents the amount of heat energy released or absorbed during the reaction.

The expression 78.3 kJ in the thermochemical equation signifies the amount of heat energy released or absorbed during the reaction. In this case, the positive value of 78.3 kJ indicates that the reaction is exothermic, meaning that heat energy is released as a product of the reaction.

This means that the reaction releases 78.3 kJ of heat energy for every mole of product formed, and this energy can be measured experimentally using calorimetry techniques. The units of energy, in this case, are kilojoules (kJ), which is a standard unit of energy in the International System of Units (SI).

To know more about thermochemical equation, here

brainly.com/question/29857323

#SPJ4

--The complete question is, Here is a generic thermochemical equation involving reactants a and b and products c and d,  a + 2b ----> 2c + d; 78.3 kJ. What does the expression 78.3 kJ signify?--

Answer:

The correct answer is - James-Lange.

Explanation:

The James-Lange theory of emotion proposed by the American psychologist James which is further studied explained, and developed by the psychologist Lange.

It is a theory that suggests that physiological changes and changes in the body result in developing emotions or specific feelings according to the changes that occurred.

Answer:

1) 0.1077 moles

2) 137043.2 moles

3) 180.186 grams

4) 6.53×10²² molecules or formula units

5) 1.505×10²³ ions

6) 90.626 grams

7) 0.555 moles

Explanation:

1) The number of moles, n = Mass of the substance/(Molar mass of the substance)

The molar weight of PO₄⁻³ is 94.971 g/mol

The number of moles in 10.23 g of PO₄⁻³ is n =10.23/94.971 = 0.1077 moles

The number of moles in 10.23 g of PO₄⁻³ = 0.1077 moles

2) The number of molecules of Na₂CO₃ in one mole of Na₂CO₃ is given by the Avogadro's number, \(N_A\) = 6.02 × 10²³ molecules

Therefore, the number of moles in 8.25 × 10²⁸ molecules of Na₂CO₃ is found by determining how many Avogadro's number of molecules are in 8.25 × 10²⁸ molecules of Na₂CO₃ as follows;

The number of moles in 8.25 × 10²⁸ molecules of Na₂CO₃ = (8.25 × 10²⁸)/(6.02 × 10²³) = 137043.2 moles

The number of moles in 8.25 × 10²⁸ molecules of Na₂CO₃ = 137043.2 moles

3) The molar mass of CH₂O = 30.031 g/mol

Therefore, the mass of 6 of CH₂O = 6 moles × 30.031 g/mol = 180.186 grams

The mass of 6 of CH₂O = 180.186 grams

4) The molar mass of NaCl = 58.44 g/mol

The number of moles of NaCl in 6.34 g of NaCl 6.34/58.44 = 0.1085 moles

1 formula unit of NaCl = 1 molecule of NaCl

The number of molecules in one mole of  a substance =  \(N_A\) = 6.02 × 10²³

Therefore, the number of molecules in  0.1085 moles of NaCl = 6.02 × 10^(23) × 0.1085 = 6.53×10²² molecules or formula units

5) The number of ions per mole of any substance is give by Avogadro's number, \(N_A\) = 6.02 × 10²³ ions,

The number of ions in 0.25 moles of Cu⁺² = 0.25×6.02 × 10²³ ions = 1.505×10²³ ions

The number of ions in 0.25 moles of Cu⁺² =  1.505×10²³ ions

6) The molar mass of CH₄ = 16.04 g/mol

The number of moles, n, in 3.4×10²⁴ = 3.4×10^(24)/(6.02×10^(23)) = 5.65 moles 5.65*16.04

The mass of 5.65 moles of CH₄ = 5.65 moles × 16.04 g/mol = 90.626 grams

The mass of 3.4×10²⁴ molecules of CH₄ = 90.626 grams

7) The density of water = 1 g/mL

The volume of the water 10 mL

The mass of the water = Volume × Density = 10 mL × 1 g/mL= 10 grams

The molar mass of water = 18.015 g/mol

The number of moles of water in 10 g  of water = mass/(Molar mass) = 10/18.015 = 0.555 moles.