When the following equation is balanced, what is the coefficient for NaNO3?
_AI(NO3)3 +_Na2SO4 →
Al2(SO4)3 +
--- NaNO3
A.1
B.2
C.3
D.6

Answer:

The nuclide formed by the β decay of 26Al is 26Mg.


Mark my answer as brainliest! this was a difficult one

Answer:

326.9mL

Explanation:

...Of a 1.3M aluminium chloride solution that contains 425mmol of aluminium chloride...

The prefix milli, m, means denotes factor of one thousandth (1x10⁻³), that means 425mmol are:

425mmol * (1x10⁻³mol / 1mmol) = 0.425moles of AlCl₃.

In the same way, Molarity, m, is defined as moles of solute (aluminium chloride) per liter. The 1.3M contains 1.3 moles per liter. There are 0.425moles in:

0.425moles * (1L / 1.3moles) = 0.3269L.

In milliliters:

0.3269L * (1000mL / 1L) =

The enthalpy change of the reaction C(diamond) → C(graphite) is -2.9 kJ.

The given information is ΔHrxn for the reaction C(diamond) → C(graphite) can be calculated with the given equations:Equations:  C(diamond) + O2(g) → CO2(g) ΔH = −395.4 kJ  2 CO2(g) → 2 CO(g) + O2(g) ΔH = 566.0 kJ  C(graphite) + O2(g) → CO2(g) ΔH = −393.5 kJ  2 CO(g) → C(graphite) + CO2(g) ΔH = −172.5 kJThe required reaction can be obtained by adding the equations (1) and (4), as follows:C(diamond) + O2(g) + 2CO(g) → C(graphite) + 3CO2(g)Addition of the two equations (1) and (4) results in a reaction whose products are C(graphite) and CO2.

To get the final equation that involves only the required reactants and products, the equation (2) should be added, which consumes CO2 and produces O2, as shown below:C(diamond) + O2(g) → CO2(g)  ΔH = −395.4 kJ [eq. (1)]  2 CO(g) → C(graphite) + CO2(g)  ΔH = −172.5 kJ [eq. (4)]  2 CO2(g) → 2 CO(g) + O2(g)  ΔH = 566.0 kJ [eq. (2)]  C(diamond) + O2(g) + 2CO(g) → C(graphite) + 3CO2(g)  ΔHrxn=ΣΔHf(products)−ΣΔHf(reactants)  ΔHrxn=[(3 mol CO2)(-393.5 kJ/mol) + (1 mol C(graphite))(0 kJ/mol)] − [(1 mol C(diamond))(0 kJ/mol) + (1 mol O2)(0 kJ/mol) + (2 mol CO(g))(−172.5 kJ/mol)] − [(2 mol CO2)(566.0 kJ/mol)]  ΔHrxn=−2.9 kJ.

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A public good cannot be provided to one person without making it available to others as well.

A non-exclusive, non-rivalrous good is referred to as a public good. It cannot be given to just one person without also being made available to others. If one person uses it, it doesn't prevent others from doing so as well. Roads are an illustration of a public good.

Club goods and private goods are in opposition to public goods. An example of a public good is a club good. It is non-rivalrous but excludable. One example of a club good is paid streaming services. The service is not available to those who do not subscribe. However, each subscriber is equally valued by the service.

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After 168 days, only 1/64th of the original sample of Cr-51 will remain.

The half-life of Cr-51 is 28 days, which means that half of the original sample will have decayed after 28 days.

After another 28 days (56 days total), half of the remaining half will have decayed, leaving only one-fourth (1/2 x 1/2 = 1/4) of the original sample.

Similarly, after 84 days (3 half-lives), half of the remaining one-fourth will have decayed, leaving only one-eighth (1/2 x 1/4 = 1/8) of the original sample.

After 112 days (4 half-lives), half of the remaining one-eighth will have decayed, leaving only one-sixteenth (1/2 x 1/8 = 1/16) of the original sample.

After 140 days (5 half-lives), half of the remaining one-sixteenth will have decayed, leaving only one-thirty-second (1/2 x 1/16 = 1/32) of the original sample.

Finally, after 168 days (6 half-lives), half of the remaining one-thirty-second will have decayed, leaving only one-sixty-fourth (1/2 x 1/32 = 1/64) of the original sample.

Therefore, after 168 days, only 1/64th of the original sample of Cr-51 will remain.

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Answer:

a. The Zn and HCl both retained their identity.

134.3 liters of oxygen gas at STP could be produced from 500.0 g of potassium chlorate.

We can use the ideal gas law to find the volume of hydrogen at STP (standard temperature and pressure, 0°C and 1 atm) that would contain 58.7 moles: PV = nRT

(1 atm) V = (58.7 mol) (0.08206 L atm/mol K) (273.15 K), V = 1,275 L

Finally, we can use the ideal gas law to calculate the volume of O2 produced at STP (standard temperature and pressure, which is 0°C and 1 atm):

PV = nRT

V = nRT / P

V = (6.12 mol)(0.0821 L•atm/mol•K)(273 K) / 1 atm

V = 134.3 L

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Answer:

All known vaccine molecules must be tested to find the right one.

Explanation:

I took the test

Answer:

cooking an egg is a chemical reaction because you can change the cooked egg into it original form

Explanation:

pls pls give brainliest pls

Answer:

Yes,Cooking an egg is a chemical reaction.

Explanation:

There are two types of reactions

Answer:

207.2 u

Explanation :

hope it helps :)

Answer:

N10W

Explanation:

Strike is the direction of line formed by the intersection of a rock surface with a horizontal plane. Strike and dip are always perpendicular to each other on a map. On a fold, the AXIS is the ridge or plane of sharpest folding.In the question option (B) is correct option.

correct notation is N10W if the strike of a unit is 10 degrees west of north.

Answer:

30.0 mol CO₂

Explanation:

C₃H₈ + 5O₂ → 3CO₂ + 4H₂O

To answer this problem we need to convert moles of C₃H₈ into moles of CO₂: We'll do that by using the stoichiometric coefficients, using a conversion factor that has C₃H₈ moles in the denominator and CO₂ moles in the numerator:

10.0 mol C₃H₈ * \(\frac{3molCO_2}{1molC_3H_8}\) = 30.0 mol CO₂

Answer:

silicon 0.712 J/g°C

Explanation:

i hope this helps you, sorry if im wrong, but this should be correct!

Answer:

.7109  j / gm-C

Explanation:

Specific heat =  j/gm-C

j = 2110     gm = 44.7     C = ( 89.6-23.2) = 66.4

2110 /(44.7 * 66.4) = .7109   j/gm-C

Answer:

A and D then I guess

Explanation:

sorry hope this helps!

Answer:X-64 is closer to the atomic mass of 64.32 amu. The one on the periodic table is the isotope most common in nature.

Explanation:

The average atomic mass of an  element can be calculated from the percentage abundance and atomic masses of its isotopes. The atomic mass of the element is 64.32 amu which is near to the mass of X-64. Thus the percentage abundance of X-64 will be greater.

Isotopes are atoms of same atomic number and different mass numbers. There many elements which are having both stable and unstable isotopes. The unstable isotopes may undergo radioactive decay and forms a new stable isotope.

Let the fraction of abundance of X-64 be x and the that of X-65 is 1-x. Since total is 100%. Now,

64 (x) + 65 (1-x) = 64.32

x = 0.68.

Thus percentage abundance of X-64 is 68 % and that of X-65 is 100 - 68 = 32 %.

Therefore, the percentage abundance of the element X with isotopes X-64 is having greater abundance.

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Metal conductivity generally goes down or resistivity goes up with temperature goes up.

The equilibrium pressure of the nitrogen oxide is given as 4 atm.

Kp is the equilibrium constant for a chemical reaction in terms of partial pressures. It is defined as the ratio of the product of the partial pressures of the products raised to their stoichiometric coefficients to the product of the partial pressures of the reactants raised to their stoichiometric coefficients

We know that;

Kp = \(pNO_{2} ^2/pN_{2} ^2 . pO_{2}\)

\(3.2 * 10^-28 = (2x)^2/(3.21 - 2x) (6.21 - x)\\3.2 * 10^-28 = 4x^2/19.9 - 3.21x - 12.42x + 2x^2\\3.2 * 10^-28(19.9 - 15.63x + 2x^2) = 4x^2\\6.4 * 10^-27 - 5 * 10^-27 x + 6.4 * 10^-28x^2 = 4x^2\\x = 4 atm\)

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Answer:

the answers are in the pic

Explanation:

Answer:

12.36, 52.49, 40.13

Explanation:

Step 5 for the copper one

Answer:

3

Explanation:

Important concept! The little number after an element represents the number of atoms in the substance. Eg. SF6. The 6 after the F tell us that there are 6 atoms of Fluorine in SF6. The coefficient or big number before a substance tells us how many of that substance there is in the equation. TO find the number of atoms in a substance with a coefficient we simply multiply the coefficient by the subscript or small number. Eg. 4SF6. The number of fluorine atoms in 4SF6 can be found my multiplying 4 and 6. 4 * 6 = 24 so there are 24 atoms of fluorine in 4SF6

Balancing the equation!

First lets list the number of atoms of each element on each side so we can see what we need to balance

SF6 + SO3 --> O2SF2

               2  S   1

               6  F  2

               3  O  2

First lets balance the number of oxygen atoms. We can do this by adding a coefficient of 2 to SO3 and a 3 to O2SF2. After doing so lets count the number of atoms of each element again as some of them may have changed.

SF6 + 2SO3 --> 3O2SF2

                3  S   3

                6  F  6

                6  O  6                

It appears that the each element in the reaction is now balanced after adding a 2 to SO3 and a 3 to O2SF2 so the equation is now balanced.

The answer would be 3 as 3 was added to O2SF2 to balance the reaction.

The compound has an empirical formula of \(K_2H_2P_2O_8\) and a molecular formula of \(K_2HPO_4\).

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The correct question would be as

The composition of a compound is 28.73% K. 1.48% H, 22.76% P, and 47.03% O. The molar mass of the compound is 136.1 g/mol. What is the Molecular Formula of the compound?

\(KH_2PO_4\\KH_3PO_4\\K_2H_4P_20_{12}\\K_2H_3PO_6\)

When fossil fuels burn, several forms of energy are produced, including:

Heat energy: The primary form of energy released during fossil fuel combustion is heat. Fossil fuels contain chemical energy stored for millions of years, and when they burn, this energy is released in the form of heat. The heat energy can be harnessed for various purposes, such as heating buildings or generating steam to drive turbines.

Light energy: Burning fossil fuels can also produce light energy in the form of flames or glowing embers. This light energy is a byproduct of combustion.

Mechanical energy: Heat generated by burning fossil fuels can be converted into mechanical energy. This is typically achieved by using heat to produce steam, which drives a turbine connected to a generator. The rotating turbine converts the heat energy into mechanical energy, which is further transformed into electrical energy.

Electrical energy: Through the process described above, burning fossil fuels can ultimately generate electrical energy. The mechanical energy produced by the turbine is converted into electrical energy by the generator. Electrical energy can power various devices, appliances, industries, and infrastructure.

It's critical to note that while burning fossil fuels can produce useful forms of energy, it also results in the release of carbon dioxide and other greenhouse gases. This contributes to climate change and environmental concerns. As a result, there is a global shift towards cleaner and renewable energy sources to mitigate these negative impacts.

Answer:

To determine how many total electrons there are, add the amount of charge to the atomic number

Explanation:

For example, N3- has a -3 charge which means it has 3 more electrons than a neutral nitrogen atom. Nitrogen's atomic number is 7, therefore this ion has 10 electrons.

Answer:

Dear user,

Answer to your query is provided below

When small amount of acid was added to buffered solution, pH will change very less.

Explanation:

Buffer solution resists change in ph on adding small amount of acid or base but when we calculate the value of buffer capacity we take the change in ph when we add acid or base to 1 lit solution of buffer.This contradicts the definition of buffer solution.

Answer:

its 2

Explanation:

boron has 6 neutrons and oxygen has 8 neutrons on avg.

the difference is 2 neutrons

Answer:

A. Sugar

Explanation:

Sugar dissolves in water because of its molecular structure (C6H12O6), as the sugar is put in the water, energy is released and the polarity of the water breaks apart the molecules. However, the molecules can be obtained back by evaporating the water.

The total number of atoms in 3.75 mol of ammonium nitrate, NH4NO3, is equal to the Avogadro's number, which is 6.022 x 10^23, times the number of moles, which is 3.75 in this case.

Thus, the total number of atoms in 3.75 mol of ammonium nitrate is equal to 2.26 x 10^24 atoms.

This number can be further broken down into the number of atoms of each element present in the compound. Ammonium nitrate is composed of two elements, nitrogen (N) and hydrogen (H). For each mole of ammonium nitrate, there are 4 moles of hydrogen atoms and 2 moles of nitrogen atoms.

Therefore, in 3.75 moles of ammonium nitrate, there are 15 moles of hydrogen atoms and 7.5 moles of nitrogen atoms, which is equal to 9 x 10^24 hydrogen atoms and 4.05 x 10^24 nitrogen atoms.

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Answer:

Explanation:

The crabs cannot see the plankton they eat near the ocean floor. For the crabs to see the plankton, some color of visible light would need to reach the plankton so that it can be reflected into the crabs' eyes.

Crabs cannot see the plankton they eat near the ocean floor.

Plankton are a collection of tiny organisms that live at and beneath the surface of lakes, rivers, ponds, and oceans across the planet.

Some crabs have colour coding capabilities , but the crabs to see the Planktons the light must reach the plankton , reflect and reach to the eyes of crabs , but the light does not reach inside the ocean and so crabs see the plankton they eat near the ocean floor.

Hence crabs cannot see the plankton they eat near the ocean floor.

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Answer:

true i think but dont take my word for it.✌

According to the electronic configuration, carbon has 4 valence electrons that makes it a very stable atom that readily bonds.

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

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GREETINGS!

The system here is chloroplast, so the boundary of the system would be cell cell membrane. Input will be nutrients, output waste and process photosynthesis

HOPE IT HELPS!