How do Earth’s plates able to move?

2Na(s)+Cl2(g) 2NaCl(s) is the balanced equation.

However, closer examination of this equation reveals that, despite having one sodium atom on each side of the arrow, the reactants contain two chlorine atoms whereas the products have just one. This equation is invalid for use in chemical calculations because it is unbalanced.

Once more, chemical reactions never result in the creation or destruction of atoms. A balanced chemical equation is this kind of chemical equation. A chemical equation that complies with the law of conservation of matter is said to be balanced.

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Answer:

24.32 amu

Explanation:

From the question given above, the following data were obtained:

Isotope A (Mg–24):

Mass of A = 24 amu

Abundance (A%) = 79%

Isotope B (Mg–25):

Mass of B = 25 amu

Abundance (B%) = 10%

Isotope C (Mg–26):

Mass of C = 26 amu

Abundance (C%) = 11%

Average atomic mass of Mg =?

Average atomic mass = [(Mass of A × A%)/100] + [(Mass of B × B%)/100] + [(Mass of C × C%)/100]

= [(24 × 79)/100] + [(25 × 10)/100] + [(26 × 11)/100]

= 18.96 + 2.5 + 2.86

= 24.32 amu

Thus, the average atomic mass of Mg is 24.32 amu

Answer:

Life in the Han Dynasty (206 BCE - 220 CE) differed significantly from today in family, government, social structure, religion, and trade. For example, the Han Dynasty emphasized a patriarchal family structure, where the eldest male held authority, and filial piety was highly valued. In contrast, contemporary societies embrace more egalitarian family dynamics with shared decision-making.

The government system of the Han Dynasty relied on a centralized bureaucracy and emphasized meritocracy, while modern societies often adopted democratic systems. Socially, the Han Dynasty followed a hierarchical model influenced by Confucian principles, whereas contemporary societies strive for greater equality and social mobility.

Religion in the Han Dynasty combined Confucianism, Taoism, and Buddhism, whereas modern societies exhibit diverse religious beliefs. Lastly, trade in the Han Dynasty thrived along the Silk Road, while modern trade was globally interconnected and facilitated by technological advancements. These differences highlight the evolution of society over time.

Explanation:

The following statement is true concerning the results of the Human Genome Project:

The Human Genome Project has raised many complicated ethical issues.

What is Human Genome?

The human genome refers to the complete set of genetic information (DNA) present in human cells. It includes both the protein-coding and non-coding regions of DNA. The human genome is made up of about 3 billion base pairs and is organized into 23 pairs of chromosomes. The study of the human genome is an important field of genetics and has many implications for understanding human biology, evolution, and disease.

The Human Genome Project was a scientific research project that aimed to identify and map all the genes in the human genome, which contains all the genetic information needed for human development and function. The project was completed in 2003 and provided a wealth of information about the structure and function of the human genome, including the location and sequence of all human genes.

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Answer:

B

Explanation:

Answer:

Explanation:

                                       Answer:

Explanation: stay the same

Exothermic refers to chemical interactions that aerobic respiration. Combustion reactions release higher energy. Endothermic refers to atoms and molecules that either use or absorb reactive power.

A chemical process known as an endothermic releases energy as heat or light. It is an endothermic reaction's opposite. Chemical equation expressed as reactants + products + energy. An reaction mechanism is one in which electricity is given off as light or warmth.

A response is deemed to be exothermic if it produces heat while also undergoing a net decrease in basic enthalpy change. Samples include those type of combustion, iron rust, including water froze. Exothermic processes are those that discharge heat and energy into the surroundings.

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Answer:

Student 2

Explanation:

I am not 100% sure but I would say Student 2

:)

i agree with the other answer

Answer:

404.47692 g

Explanation:

Na₂CO₃ + Ca(NO₃)₂ ⇒ CaCO₃ + 2NaNO₃

From the coefficients in the balanced chemical equation, we see that the ratio of Ca(NO₃)₂ and 2NaNO₃ is 1:2, so every 1 mol of Ca(NO₃)₂ produces 2 mols of 2NaNO₃.

(4.93 mol NaNO₃)(\(\frac{Ca(NO3)2}{2NaNO3}\)) = 2.465 mol Ca(NO₃)₂

Then, we need to convert from moles to grams, since we are asked to find the mass of Ca(NO₃)₂. To do this, we need to look up the molar mass of Ca(NO₃)₂, which is 164.088 g/mol.

(2.465 mol Ca(NO₃)₂ ) (  \(\frac{164.088 g}{1 mol}\)) =  404.47692 g

Thus,  404.47692 grams of Ca(NO₃)₂ is needed to produce 4.93 mol of 2NaNO₃.

Lift of the Wing is 375.6 lb

Lift of the Tail is 27.3 lb

Trimmed Angle of Attack of the Wing is 3.83aL-Q-2 deg

Trimmed Angle of Attack of the Horizontal Tail is Infinity deg

To calculate the lift of the wing and lift of the tail, as well as the trimmed angle of attack of the wing and horizontal tail, we need to use the following equations:

Lift of the Wing = W / (0.5 * ρ * V² * S * cosα)
Lift of the Tail = W / (0.5 * ρ * V² * S * cosβ)
Trimmed Angle of Attack of the Wing = ARwing / (2 * e)
Trimmed Angle of Attack of the Horizontal Tail = ARtail / (2 * e)

Given the following data:
ARwing = 7.65aL-Q-2 deg
e=1
Xcg = 0.5c
ARtail = 5.08aZ-Q-2 deg
e=0
Sw = 240 ft²
W = 12,000 lb
Stail = 20.32 ft²
Mach = 0.2 (S.L.)
MAC = 5000 ft-lbf
I = 17 ft
c = 8 ft

The lift of the wing is calculated as:
Lift of the Wing = 12,000 lb / (0.5 * 0.002377 * 0.2² * 240 ft² * cos7.65aL-Q-2 deg) = 375.6 lb

The lift of the tail is calculated as:
Lift of the Tail = 12,000 lb / (0.5 * 0.002377 * 0.2² * 20.32 ft² * cos5.08aZ-Q-2 deg) = 27.3 lb

The trimmed angle of attack of the wing is calculated as:
Trimmed Angle of Attack of the Wing = 7.65aL-Q-2 deg / (2 * 1) = 3.83aL-Q-2 deg

The trimmed angle of attack of the horizontal tail is calculated as:
Trimmed Angle of Attack of the Horizontal Tail = 5.08aZ-Q-2 deg / (2 * 0) = Infinity deg

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Considering the ideal gas law, the volume occupied by 3.25 moles of an ideal gas at a temperature of 18.00°C is 686.71 L.

An ideal gas is the behavior of those gases whose molecules do not interact with each other and move randomly. Under normal conditions and under standard conditions, most gases exhibit ideal gas behavior.

An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T), related by a simple formula called the ideal gas law:

P×V = n×R×T

Where:

In this case, you know:

Replacing in the ideal gas law:

1.13 atm×V = 3.25 mol× 0.8205 L.atm/K.mol× 291 K

Solving:

V = (3.25 mol× 0.8205 L.atm/K.mol× 291 K)÷ 1.13 atm

V= 686.71 L

Finally, the volume is 686.71 L.

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0.285 moles of NH3 will be produced in the reaction.

To determine the number of moles of a product formed, one must have knowledge of the stoichiometric proportions of the reaction.

In the case of the question, we have that for every 1 mol of N2, 2 mol of NH3 are formed, so it is enough to calculate the amount of mols of N2 present and perform the proportion:

                                    \(MM= \frac{m}{mol} \\14g/mol= \frac{2g}{mol} \\\\mol = 0.143\)

Finally, just perform the proportion, so that:

                                              \(\frac{1mol}{0.143mol} =\frac{2mol}{xmol}\\\\x = 0.285\)

So, none of the above options are right, since 0.285 moles of NH3 will be produced in the reaction.

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Answer: it will have a pressure of approximately 371.73 κPa.

We know that According to Boyle's Law

P1 ×V1 = P2 ×V2

therefore in order to find P2

P2 =\(\frac{P1 X V1}{V2}\) --------------------(I)

where

P1 = initial pressure

V1 = initial volume    

P2 = final pressure

V2 = final volume

here

P1(initial pressure) = 146 kPa        

V1(initial volume) = 2.55 L

V2(final volume) = 2 L

Now putting the given values in equation (I) :

P2 = (146 kPa × 2.55 L) / 2 L

P2 = 371.73 kPa

Therefore, 2 L of gas, when it takes 2.55 L at 146 kPa, will have a pressure of 371.73 kPa.

Moles of O₂ are required : 1 mol

Given

2.00 moles of H₂

Required

moles of O₂

Analysis

Balanced equation

Find mol ratio O₂ and H₂

Solution

Balanced equation

2H₂ + O₂ → 2H₂O

From the equation, the mol ratio of H₂ : O₂ = 2 : 1, so mol O₂ :

\(\tt \dfrac{1}{2}\times 2=1~mol\)

Answer:

true

Explanation:

the climate can sometimes be measured in thousand

Answer:

E: the point where the acid and base have been added in proper stoichiometric amounts

Explanation:

Equivalence point in titration is simply the point where the amounts of acid and base used just sufficiently reacts chemically to cause neutralization whereas the endpoint is the point where the indicator of the titration changes colour.

The Equivalence point occurs before the endpoint.

Thus, option E is correct.

Answer:63.55

Explanation:

20.23grams

Given the chemical equation below;

Determine the mole of AlCl3

Mole = Mass/molar mass

mole of AlCl3 = 100/133.34

Mole of AlCl3 = 0.749moles

According to stoichiometry, 2 moles of AlCl3 produced 2 moles of Al, hence the mole of Al required is 0.749moles

Determine the mass of Al

Mass of Al = 0.749 * 26.98

Mass of Al = 20.23grams

Hence the mass of Al that can be produced is 20.23grams

The calcium symbol is Ca. its atomic number is 20 and it is an alkaline earth metal. It is the fifth most abundant element on Earth.

Ca is on the second column from the left to right. It is a

Answer: 6.23

Explanation:

1) solve for pH  

pH=-log (H3O+) = - log 1.7 X 10^-8 =7.77

2) now do 14-pH  = 14 -7.77=6.23

Answer:

1.an alloy is a mixture of chemical elements of which at least one is metal

Answer:

Explanation:

When two non-miscible liquids are put together, the one with the higher density will be on the bottom, while the one with the lower density will be on top.

Meaning that in this problem's case toluene would be on the top layer and water in the bottom layer.

Answer:

See Explanation

Explanation:

The colour of many transition metal complexes stem from transitions of electrons between energy levels. These transitions are governed by the spin selection rules and the colour is determined by the magnitude of crystal field splitting.

According to the spin selection rules, transitions in which ΔS = 0 are forbidden. Hence, a Mn^2+high spin compound is expected to be colourless. However, contrary to the spin selection rules Mn^2+high spin compounds do exhibit transitions in which the intensity is only about one-hundredth of the intensity of the spin allowed transitions. Thus many Mn^2+  high spin compounds such as Mn(NO3)2 are very pale pink or off white.

Note also that the crystal field stabilization energy of Mn^2+ which is a d^5 low spin ion is zero hence the very pale colour observed.

K4[Mn(CN)6] is deep blue as a result of charge transfer. Also, the compound exhibits an observed crystal field stabilization energy because it is a d^5 low spin compound hence the observed colour. Its low spin nature is because the cyanide ion is a strong field ligand hence it causes a greater magnitude of crystal filed splitting.

The following compounds are colourless;

Zn(NO3)2

CdSO4

AgClO3

One thing that is common to all the compounds listed above is that they are all d^10 compounds. This means that they all possess completely filled d-orbitals hence they are colourless.

Answer:

P₂ = 3.24atm

Explanation:

Answer:

Hey, I hope this helps. You gave the equation already balanced so there was no need to do so, the next thing we need to do after balancing is to split the strong electrolytes into ions. Once that is completed we cross off any reoccurring ions. That leaves us with our complete net ionic.

I also recommend you check out Wayne Breslyn on Yt. He is so helpful with equations like these.

Answer:

6.022 X 1023 atoms

Explanation:

To find the answer to this question, the first step is to find the limiting reactant. To do it, we have to convert the given masses to moles using the molecular mass of each reactant.

The molecular mass of the FeO is 71.84g/mol and the one of the Al is 26.98g/mol.

Now, using the mole ratio of the reactants we can determine the limiting reactant:

According to this, none of them is the limiting reactant since the amount of FeO available is the required for the amount of Al available. Use the mole ratio of FeO to Fe to find how many moles of Fe will be produced:

Use the molecular mass of Fe to find the mass of Fe produced in grams:

The answer is 234.528grams of Fe.