If anyone could answer this that would be great! Will mark brainliest!

To Find :

How many moles are in [tex]7.12 \times 10^{21}[/tex] atoms of iron.

Given :

We know, 1 mole of any element or compound contains exactly [tex]N_A[/tex] ( Avogadro's Number ) atoms/compound .

Now, [tex]N_A = 6.022 \times 10^{23}[/tex]

So, number of moles in given number of atoms are :

[tex]n = \dfrac{6.022 \times 10^{23}}{7.12 \times 10^{21}}\\\\n = 1.18 \times 10^{-2} \ mol[/tex]

Hence, this is the required solution.

Answer:

Mycelium is a group of hyphae which are fungus.... these are like roots in structure

Answer:

A mycelium is the vegetative part of a fungus, consisting of a network of fine white filaments

Explanation:

Explanation:

222.01758 g/mol

3.1Computed Properties

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Answer:

[tex]2C _{6}H _{14} + 19O _{2}→12CO _{2} +14H _{2} O[/tex]

2 F atoms

Explanation:

A Ca atom has a valence number of +2, which means that when ionized, it will give up two electrons. In turn, a F atom has a valence number of -1, which means it can only accept 1 electron when ionized. So to accommodate the two electrons from Ca atom, we need 2 F atoms.

Answer:

0.0015 M

Explanation:

we know, M = n/V = 2.5/1000 = 0.0015 M

Answer:

Explanation:

Using the ideal gas equation as follows:

PV = nRT

Where:

P = pressure (atm)

V = volume (L)

n = number of moles (mol)

R = gas law constant (0.0821 Latm/molK)

T = temperature (K)

Based on the information provided in this question;

P = 1.6atm

n = 4.4 moles

R = 0.0821 L*atm/mol*K

T = 32.9°C = 32.9 + 273 = 305.9K

V = ?

Answer: The 3rd one

Explanation: Electronegativity is a measure of how strongly atoms attract bonding electrons to themselves.

I might be wrong

Answer:

60g/mol.

Explanation:

TO FIND :-

FACTS TO KNOW BEFORE FINDING ANSWER :-

SOLUTION :-

Molar mass of C₃H₈O = 3(Molar mass of C) + 8(Molar mass of H) + 1(Molar mass of O)

⇒ Molar mass of C₃H₈O = (3×12) + (8×1) + 16 = 36 + 8 + 16 = 60g/mol.

Answer:

103.9 KPa

Explanation:

From the ideal gas equation;

PV=nRT

From the parameters given;

P= ?

T=250 K

V= 60L

n=3

R=0.082 atmLK-1mol-1

P= nRT/V

P= 3 × 0.082 × 250/60

P= 1.025 atm

1 atm=101325 pascals

1.025 atm = 1.025 atm × 101325 pascals/1atm

= 103.9 KPa

Answer:

103.9kPa

Explanation:

To solve this question we must use the equation:

PV = nRT

P = nRT / V

Where P is pressure in atm

n are moles of the gas = 3mol

R is gas constant = 0.082atmL/molK

T is absolute temperature = 250K

V = 60L

P = 3mol*0.082atmL/molK*250K / 60L

P = 1.025atm

As 1atm = 101.325kPa

1.025atm * (101.325kPa / 1atm) = 103.9kPa

Answer:

Explanation:

Basically in metallic bonds, valence electrons are not localied which means they can freely move from one atom to another. Thus, they move in "sea of electrons" because in a sea water or waves are freely moving without any localization.

Hope that helps.

Answer:

have g8igcicg9ccgco

Explanation:

gcohogxzrxog floor. gi gi gi gi. r. uvgi7rz. g yde6ifkg. gg g goog oh g of ifz8fd8dti

Answer:

22.54 moles of NaBr are needed

Explanation:

The reaction of Cl2 with NaBr occurs as follows:

Cl2 + 2NaBr → 2NaCl + Br2

Where 1 mole of Cl2 requires 2 moles of NaBr for a complete reaction

As in the problem, we have 11.27 moles of Cl2, the moles of NaBr required are:

11.27mol Cl2 * (2mol NaBr / 1mol Br2) =

Answer:

Part a)

No Reaction

Part b)

CaNO3 is formed

Explanation:

Part a)

Silver is less reactive than lead and hence when Ag metal is added to a Pb(NO3)2 solution there will be no reaction

Ag (s) + Pb(NO3)2 (aq) --> Ag (s) + Pb(NO3)2 (aq)

Part b)

Calcium is more reactive than silver and hence when calcium is added to the solution of AgNO3, it will replace Ag from the AgNO3 and itself form compound with NO3 2- ion.

The reaction for the same is

Ca (s) + AgNO3 = CaNO3 + Ag (s)

Answer:

Metal

Non-metal

Explanation:

CaF2 is an ionic compound. Ionic compounds are mostly composed of a metal and a non metal. Metals donate electrons to non-metals to form ionic compounds.

Calcium is a divalent ion of group two in the periodic table while F is a univalent nonmetal of group 17 in the periodic table. Hence the compound CaF2 is composed of a metal and a nonmetal.

Answer:

carbon dioxide

oxygen

**

During photosynthesis, plants incorporate atmospheric pressure into more complex energy-storage molecules that increase the mass of the plants. Plants need sunlight for this process because plants transform light energy into chemical energy stored in the molecules.

It is the process by which plants , algae and some bacteria uses water from the carbon dioxide, air and soil and in this process food is prepared in the presence of chlorophyll and sunlight. In this process light energy converted to chemical energy.

Thus, we can say that During photosynthesis, plants incorporate atmospheric pressure into more complex energy-storage molecules that increase the mass of the plants. Plants need sunlight for this process because plants transform light energy into chemical energy stored in the molecules.

Learn more about the Photosynthesis here: https://brainly.com/question/19160081

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Answer:

In Alpha Decay the nucleus is split into 2 parts with one of these parts – the alpha particle – zooming off into space. The nucleus has its atomic number reduced by 2 and its mass number is reduced by 4 (2 protons and 2 neutrons are removed). In Beta Decay (minus) a neutron turns into a proton.

Explanation:

Answer:

Br

Explanation:

Answer:

0.2832 moles

Explanation:

mole = mass/ molar mass

mole= 28.35/100.08

mole=0.2832

Answer:

Explanation:

1. Please provide the enthalpy info - I will work on it with the info

2.

i) Reaction a should be modified to match the number of S in equation:

 2S + 2O2 -> 2SO2     deltaH = -370kJ

ii) Reaction b should be written reversely to match the reactants of SO2:

 2SO2 + O2 -> 2SO3     deltaH = 256kJ

iii) Adding the equations together:

 2S + 3O2 -> 2SO3

iv) Enthalpy of the combined reaction = -370+256 = -114kJ

 It is negative so the reaction is exothermic.

Answer:

Explanation:

1 c. enthalpy change = enthalphies of formation of all products - enthalphies of formation of all reactants =  -526.3 kcal/mol

1 d. C3H8(g) + 5 O2 (g) → 3 CO2 (g)  + 4 H2O (l)    ΔH = -526.3 kcal/mol

Answer:

See explanation

Explanation:

Let us consider the two compounds carefully. Carbon dioxide is purely a non-polar molecular compound while the bond between the C2^2- ion and Ca^2+ is ionic thereby making CaC2 an ionic compound.

Recall that ionic compounds have high melting and boiling points due to strong ionic interactions in the structure of the compound.

On the other hand, CO2 is a non-polar substance whose molecules are held together only by weak dispersion forces.

As a result of the reasons outlined above, carbon dioxide has a low boiling point and calcium carbide has a high boiling point.

Answer:

0.02 m

Explanation:

∆U = q + w

w = ∆U - q = (1380 - 2040) J = -660 J

w = -p∆V = -pA∆h

∆h = -w/(pA)

p = 1 bar × (100000 Pa/1 bar) = 100000 Pa

∆h = -(-660 J)/(100000 Pa×0.33 m²) = 0.02 m

A gas is contained in a horizontal cylinder with a moveable piston of cross-sectional area 0.33\text{ m}^20.33 m 2. The distance through which the piston moves is 0.02 m.

Among other related systems, pistons are found in reciprocating engines, reciprocating pumps, gas compressors, hydraulic cylinders, and pneumatic cylinders. It is the moving part that is enclosed in a cylinder and sealed off from the gas by piston rings.

The piston, which is a part of combustion engines, transforms the energy released during combustion into a mechanical action and sends it, via the piston pin and connecting rod, to the crankshaft as a torsional force. The piston in the cylinder goes up and down when the engine is running.

The equation given by

∆ U = q + w

w = ∆ U - q

= ( 1380 - 2040 )

J = -660 J

w = -p∆V

= -pA∆h

∆h = -w / (pA)

p = 1 bar × ( 100000 Pa / 1 bar )

= 100000 Pa

∆h = - ( -660 J) / ( 100000 Pa × 0.33 m² )

= 0.02 m

Thus, The distance through which the piston moves is 0.02 m.

To learn more about piston, follow the link;

https://brainly.com/question/21852769

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Answer:

7 is the only basic number on a pH scale

Answer:

the relationship between mass and volume