7 H2SO4
what is the coefficient?
what are the subscript numbers?

Answer:

minerals

Explanation:

defines a mineral as "a naturally occurring inorganic element or compound having an. orderly internal structure and characteristic chemical composition, crystal form, and physical. properties." Minerals differ from rocks, which are naturally occurring solids composed of one or more minerals.

Answer:

hi

Explanation:

Answer:

What leads to the formation of a wind chill factor? A change in the air temperature creates air pressure differences in the atmosphere

Explanation:

hope this helps :)

Answer:

Chemical Formula = Ca(OH)₂

Molar Mass = 74.09 g/mol

Explanation:

The chemical formula for calcium hydroxide is: Ca(OH)₂. We can know that because the calcium ion always has a +2 charge, while the hydroxide ion has a -1 charge.

We calculate the molar mass by adding together the atomic masses of each atom that makes the compound (these can be found in a periodic table):

Molar Mass = Atomic Mass Ca + (Atomic Mass O)*2 + (Atomic Mass H)*2

Molar Mass = 40.078 + (15.999)*2 + (1.007)*2

Molar Mass = 74.09 g/mol

Answer:

Na and Cl option d.

Explanation:

Ionic bond commonly occurs between a metal and non metal on combining to produce a compound.

In that case, the most appropriate choice would be to go with

option d - Na and Cl.

They combine to form common salt or NaCl.

Na ( sodium) is a metal while Cl (chlorine) is a non metal.

Answer:

See the answer below

Explanation:

Distillation is a process of separating the contents of a liquid mixture by making use of the difference in the boiling temperatures of the components of the mixture. As the boiling point of each component is reached, it evaporates off and the vapor is condensed and collected to give a pure product.

It is never advisable to distillate to dryness because allowing the content of the distilling flask to dry up can cause heat to damage the flask or in some extreme cases, cause unintended chemical reactions that might alter the outcome of the experiment or cause laboratory accident.

Answer:

a) The formal charge on N is 0 in both species.

Explanation:

The formal charge is calculated using the formular;

FC = V-N-B/2

Where;

V = Number of Valence electrons

N = number of nonbonding valence electrons

B = total number of electrons shared in bonds

In NO2-;

The formal charge of N is given as;

FC = 5 - 2 - 6/2

FC = 0

In HNO2

The formal charge of N is given as;

FC = 0

The correct option is;

a) The formal charge on N is 0 in both species.

In my opinion yes but thats me

Answer:

-776 KJ/mol

Explanation:

We must look towards the balanced reaction equation in order to obtain the number of electrons transferred in the redox reaction.

3Cu(s) + 2MnO4^-(aq) + 8H^+(aq)------>3Cu2+(aq) + 2MnO2(s) + 4H2O(l)

We can easily see that copper lost six electrons while Manganese gained six electrons hence n=6

ΔG =-nFEcell

Where;

n= 6

F = 96500 C

Ecell=+1.34

ΔG = -(6 * 96500 * 1.34)

ΔG = -776 KJ/mol

Answer:

See the answer below

Explanation:

A weak solution of acid would gradually dissolve the calcium carbonate in limestone statues. For example, dilute sulphuric acid formed from the dissolution of SO2 in rainwater would react with calcium carbonate according to the following equation;

    [tex]H_2SO_4(aq)+CaCO_3(s)-->CaSO_4(s)+CO_2(g)+H_2O (l)[/tex]

Generally, the rate of any reaction depends on a host of factors such as temperature, pressure, presence of catalysts, and surface area of reactants. The higher the surface area of reactants, the higher the rate of reaction.

In this case, the rate of reaction of the dilute acid and the calcium carbonate depends on the surface area of the calcium carbonate which happens to be the only solid reactant. Statues with intricate carvings seem to break down more quickly than ordinary statues because they offer more surface area for reaction to take place. The intricate carvings create more surface area for reactions when compared to statues without intricate carvings.

Answer:

The time taken for the statue to break down depends on the reaction rate.

The low concentration of acids in acid rain reduces the reaction rate and increases the time required to break down the statue.

Intricate carvings increase the surface area of the statue and therefore increase the rate of the statue’s breakdown.

Explanation:

EDGE2021

Answer:

1.03

Explanation:

Answer:

C

Explanation:

because its half life is shorter than the subsequent ones

Answer:

Tetrahedral

Explanation:

According to the valence shell electron pair repulsion theory, the number of electron pairs on a molecule determines the arrangement of electrons around the central atom of the molecule or ion.

In this case, there are four electron pairs around the central atom in the molecule or ion hence they are arranged in tetrahedral geometry. Note that the lone pairs only determine the molecular geometry and  not the electron geometry or arrangement.

There are 3.42 moles of F in 0.570 moles of C₃H₂F₆

Given

0.570 moles of C₃H₂F₆

Required

moles of F

Solution

The chemical formula of a compound shows the mole ratio of the constituent elements

In the compound C₃H₂F₆, the mole ratio of the elements is:

C: H: F = 3: 2: 6

So in 1 mol of C₃H₂F₆, there are 3 moles of C, 2 moles of H and 6 moles of F

And for 0.570 mol of C₃H₂F₆ :

[tex]\tt moles~F=\dfrac{0.57}{1}\times 6=3.42[/tex]

Answer:

Al(OH)₃(aq) + 3 HBr(aq) ⇒ AlBr₃(aq) + 3 H₂O(l)

Explanation:

Let's consider the unbalanced equation for the reaction between solid aluminum hydroxide and a solution of hydrobromic acid. This is a neutralization reaction so it forms a salt, aluminum bromide, and water.

Al(OH)₃(aq) + HBr(aq) ⇒ AlBr₃(aq) + H₂O(l)

We start balancing Br atoms by multiplying HBr by 3.

Al(OH)₃(aq) + 3 HBr(aq) ⇒ AlBr₃(aq) + H₂O(l)

To get the balanced equation, we must multiply H₂O by 3 as well.

Al(OH)₃(aq) + 3 HBr(aq) ⇒ AlBr₃(aq) + 3 H₂O(l)

Answer:

each gas in the mixture add to give the total pressure (Ptot = P1 + P2 + P3 + ...) 1. ... After mixing, there will be the same number of moles of each gas, at the same T, just in a different volume. .OOL ... Pe=1697 atm P = 174_ atm. (1.000. ... Oxygen is pumped into a tank to supply breathing air for scuba diving, until the gas

Explanation:

The volume of the mixture will be "1208.33 L". A further solution is provided below.

The given values are:

Volume of scuba tank,

Pressure,

According to the Boyle's Law,

→ [tex]P_1V_1=P_2V_2[/tex]

or,

→      [tex]V_2=\frac{P_1V_1}{P_2}[/tex]

By putting the given values, we get

→           [tex]=\frac{290\times 10}{2.40}[/tex]

→           [tex]= \frac{2900}{2.40}[/tex]

→           [tex]= 1208.33 \ L[/tex]

Thus the above answer is correct.

Learn more about volume of mixture here:

https://brainly.com/question/3841593

Answer:

SiH4

Explanation:

We must remember that the magnitude of intermolecular forces play a vital role in the determination of the boiling point of a substance.

The Si-H bond is the least polar among all the bonds in compounds listed in the question. This is because the electronegativity difference between silicon and hydrogen is very slim resulting in the formation of a nonpolar covalent bond.

The other compounds possess more polar bonds hence have a greater degree of dipole interaction between molecules and a consequently higher boiling point than SiH4.

Answer:

they can produce large amounts of heat energey

Explanation:

i had the same question hope it helps!!!

Answer:

The fluoride which precipitates first is CaF₂

Explanation:

When F⁻ is added, CaF₂ and BaF₂ are produced following the ksp equation:

For CaF₂:

Ksp = 3.2x10⁻¹¹ = [Ca²⁺] [F⁻]²

Where [Ca²⁺] = 0.075M * {35mL / (25mL + 35mL)} = 0.04375M

3.2x10⁻¹¹ = [0.04375M] [F⁻]²

[F⁻]² = 7.31x10⁻¹⁰

[F⁻] = 2.7x10⁻⁵M

For BaF₂:

Ksp = 1.5x10⁻⁶ = [Ba²⁺] [F⁻]²

Where [Ba²⁺] = 0.090M * {25mL / (25mL + 35mL)} = 0.0375M

1.5x10⁻⁶ = [0.0375M] [F⁻]²

[F⁻]² = 4x10⁻⁵

[F⁻] = 6.3x10⁻³M

BaF₂ begins precipitation when [F⁻] = 6.3x10⁻³M

Thus, the fluoride which precipitates first is CaF₂

Answer:

The specific heat of iron is 0.45 J/g.°C

Explanation:

The amount of heat absorbed by the metal is given by:

heat = m x Sh x ΔT

From the data, we have:

heat = 180.8 J

mass = m = 22.44 g

ΔT = Final temperature - Initial temperature = 39.0°C - 21.1 °C = 17.9°C

Thus, we calculate the specific heat of iron (Sh) as follows:

Sh = heat/(m x ΔT)  = (180.8 J)/(22.44 g x 17.9°C) = 0.45 J/g.°C

Answer:

A

Glycine, luecine, and lysine are all building blocks of proteins

Answer:

a) There will be an increase in the glass transition temperature when the molecular weight increases. Based on Fox-Flory equation, with the increase in molecular weight, the transition temperature of glass also increases.

b) There will be a decrease in the glass transition temperature when the strength of the chain-chain bonding decrease as intermolecular force between the bonds reduces resulting in the decrease in the glass transition temperature.

c) There will be an increase in the glass transition temperature when the pressure increases as enhancement in pressure decreases the free volume in the surroundings and enhance the bond interaction resulting in the increase in the glass transition temperature.

Answer:

Co = 1s2 2s2 2p6 3s2 3p6 4s2 3d7

Explanation:

Number of electrons = 27

The closest noble gas before cobalt is Argon and argon has 18 electrons.

Co = [Ar]  ; Remains 27 - 18 = 9  more electrons to fill.

The next orbital in order of increasing energy is the 4s orbital. However it can only hold a maximum of 2 electrons.

We have;

Co = [Ar] 4s2; Remains 27 - 20 = 7 more electrons to fill.

The next orbital in order of increasing energy is the 3d orbital. It can have a maximum of 10 electrons.

So we have;

Co = [Ar] 4s2 3d7

The electronic configuration of Ar = 1s2 2s2 2p6 3s2 3p6

This means the entire configuration of cobalt is;

Co = 1s2 2s2 2p6 3s2 3p6 4s2 3d7

Answer: The main type of elements found in the upper right part of the periodic table are the Nonmetals. The correct option is C.

Explanation:

The Periodic table of elements describes the properties of elements which varies in regular manner. Some of these chemical properties includes:

--> Ionisation energy

--> Atomic radii

--> Ionic radii

--> Electron affinity

--> electronegativity

--> metallic Character

--> Atomic volume

It organizes known elements based on these chemical properties. From the features of a Periodic table of elements, they occur in;

--> GROUPS(when similar elements are the arranged in numbered columns). These groups are the alkali metals, alkaline earth metals, halogens and noble gases.

--> PERIODS( when arranged in numbered rows).

Every element can either be classified as a metal, nonmetal or semi metal. NONMETALS are poor conductors of heat and electricity. They are clustered in the upper right-hand corner of the periodic table.

Answer:

The answer to your question is     V2 = 4.97 l

Explanation:

Data

Volume 1 = V1 = 4.40 L                    Volume 2 =

Temperature 1 = T1 = 19°C               Temperature 2 = T2 = 37°C

Pressure 1 = P1 = 783 mmHg           Pressure 2 = 735 mmHg

Process

1.- Convert temperature to °K

T1 = 19 + 273 = 292°K

T2 = 37 + 273 = 310°K

2.- Use the combined gas law to solve this problem

                 P1V1/T1  = P2V2/T2

-Solve for V2

                 V2 = P1V1T2 / T1P2

-Substitution

                 V2 = (783 x 4.40 x 310) / (292 x 735)

-Simplification

                V2 = 1068012 / 214620

-Result

                V2 = 4.97 l

Answer:

trrgtsehghrdy

Explanation:

Molar mass of CO2 = 44g/mol

1.5

⋅

10

25

6.023

⋅

10

23

= 51.5 moles of CO2

51.5

⋅

44g/mol

=

2266

g

r

a

m

s

Hope this helped

Answer:

Ac

Explanation:

Answer:

The answer is a

Explanation:

Ac