which of the following oxides will react with magnesium most readily when both are heated?
A.zinc oxide
B. copper(2) oxide
C.lead (2) oxide
D. aluminum oxide​

Answer:

D) n = 2.5, ℓ = 0, mℓ = 0

Explanation:

According to the rules governing acceptable quantum numbers, the value for n must be an integer. Therefore, the set {n = 2.5, ℓ = 0, mℓ = 0} is not allowed.

In the combustion of 28.0 g of gasoline, 1348.1 kilojoules of energy are released.          

To find the energy released, we need to convert the energy in kilocalories to kilojoules.

We need to remember that:

Hence, the energy in kJ is:

[tex] E = 322 \:kcal*\frac{4.1868 \:J}{1 \:cal}*\frac{1000 \:cal}{1 \:kcal}*\frac{1 \:kJ}{1000 \:J} = 1348.1 \:kJ [/tex]

Therefore, 1348.1 kilojoules of energy are released.

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Answer:

Explanation:

Let's try and figure out the ones you don't keep.

Receipts from the dollar tree. You can't return what you bought and you only paid a dollar. It's not worth it.

Food receipts. You can't return it and unless you want to itemize what you spend / month and on what, they don't serve any purpose.

Now figure out which ones you would want to keep

1. Anything pertaining to medical perscriptions. I don't know how it works in the United States, but in Canada we are allowed to deduct only medications with a DIN number.

2 Anything that you would use for travelling that is not for pleasure (ie it is a business expense). So if you are a salesman and your territory is from A to B you would deduct meals, mileages, motels if you must stay away from home

3 In the states some tax receipts are deductible, so you might want to save those.

Answer:

a because it help in protecting disease

Answer:

atmoshpere

Explanation:

il explain in comment if you brainly me

Answer:

b

Explanation:

The concept Arrhenius equation is used here to determine the temperature dependence of the rate of a reaction. An increase in temperature increases the rate of a reaction. The correct option is B.

The rate of a chemical reaction is affected by the factors like temperature and activation energy. The influence of these factors on the rate of the reaction is explained by the Arrhenius equation.

The equation is given as:

[tex]k = A. e^{-} ^{E_{a} } /RT[/tex]

k - Rate constant

A - Frequency factor

Eₐ - Activation energy

R - Gas constant

T - Temperature

Since 'Temperature' appears in the denominator of the negative power of the exponential factor of the equation, it is evident that an increase in temperature increases the value of rate constant and thereby increases the rate of the reaction.

Thus the correct option is B.

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Answer:

B. basic

Explanation:

Because acidic is sour in test, salt is tasty in taste, and neutral neither bitter, tasty and nor sour

Answer:

Explanation:

Why +4?

Answer:

the hybridization of bromine in BrF5 is SP³d².

Explanation:

Because its forms five single bond &have one lone pair that consider as sigma. So total sigma bond is 6. Hence hybridisation is SP³d².

Answer:

d) The object falls towards the ground

Explanation:

movement of water from high potential to low potential

Given the flow rate and the amount of nitroglycerine contained in the IV bag, the patient should receive 63 milliliters per hours.

Rate of prescribed dose by IV: [tex]2.10*10^2 ug/min = 210ug/min[/tex]

Available: [tex]50mg nitroglycerine = 50000ug[/tex]

Available Volume: [tex]150mL[/tex]

Hence, [tex]50000ug = 250ml[/tex]

and volume for [tex]210ug = x[/tex]

We cross multiply to find x

[tex]x = \frac{210ug * 250mL}{50000ug} \\\\x = 1.05mL[/tex]

Meaning that in a single minute, 1.05mL is been infused into the patient

Now, for an hour, ( 60 minutes ) the volume infused will be;

[tex]1min = 1.05mL[/tex]

[tex]60min = x[/tex]

We cross multiply to find x

[tex]x = \frac{1.05mL*60min}{1min}\\\\x = 63mL[/tex]

Therefore, given the flow rate and the amount of nitroglycerine contained in the IV bag, the patient should receive 63 milliliters per hours.

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Answer:

mettaliod

Explanation:

Answer:

Metalloids have properties intermediate between the metals and nonmetals. They can form alloys with other metals. … Some metalloids, such as silicon and germanium, can act as electrical conductors under the right conditions, thus they are called semiconductors.

Explanation:

Mark me as the brainlyest

Answer:

N2 + O2 ------------->2NO(Balanced Reaction)

A balanced chemical equation for the standard formation reaction of gaseous nitrogen monoxide (NO) -

1/2 [tex]N_{2}[/tex] (g)   + 1/2 [tex]O_2[/tex] (g)   -----------------> NO (g)

Synthesis or formation reactions involve the combination of two or more substances that will react. There is only one product of a synthesis reaction.

1/2 [tex]N_{2}[/tex] (g)   + 1/2 [tex]O_2[/tex] (g)   -----------------> NO (g)

Thus, A balanced chemical equation for the standard formation reaction of gaseous nitrogen monoxide (NO) -

1/2 [tex]N_{2}[/tex] (g)   + 1/2 [tex]O_2[/tex] (g)   -----------------> NO (g)

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Answer:

A. Pressure, volume, temperature, number of moles

The relationships among pressure, volume, temperature, and the number of moles are expressed by the ideal gas law equation. Therefore, option A is the correct answer.

The ideal gas law equation is PV = nRT, where P represents the pressure of the gas, V represents its volume, n represents the number of moles of gas present, T represents its temperature, and R is the ideal gas constant. This equation describes the behavior of an ideal gas at standard temperature and pressure (STP).

By manipulating the ideal gas law equation, we can calculate various properties of gases, including their density, molar mass, and molecular weight. This equation is widely used in chemical engineering, thermodynamics, and other fields that deal with gases.

Thus, option A is correct.

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Answer:

location a

Explanation:

Answer:

Location B

Explanation:

Answer:

b

Explanation:

edge 2022

Answer:

2 pairs (4 electrons)

Explanation:

In a molecule of oxygen there are 2 oxygen atoms. There are 6 electrons in the outer shells of oxygen atoms. When 2 oxygen atoms form a covalent bond they share their electrons. In a diagram this would be represented by the overlap of the two circles representing the outer shells of both oxygen atoms. If each oxygen atom 'puts forward' 2 electrons into the centre, then 4 will be shared overall for each atom, making both atoms have full outer shells of 8 electrons each. 4 electrons make 2 pairs, hence the answer.

Answer:

When silver nitrate solution is added to sodium chloride solution, then a white precipitate of silver chloride is formed along with a sodium nitrate solution.

Explanation:

when silver nitrate solution is added to sodium chloride solution, a white precipitate of silver chloride is formed along with sodium nitrate solution.

AgNO3 + NaCl ----- AgCl + NaNO3

AgCl is white precipitate.

double displacement reaction

Answer:

they are the smallest of space rocks, when in the atmosphere they are called meteors.

Explanation:

i think this is right.

Answer:

20.1974

Explanation:

The Atomic mass will be the same for every isotope as the number of Neutrons changes, not the number of protons.

Neon has two major isotopes. Neon-20 and Neon-22. Out of every 250 neon atoms, 225 will be Neon-2(19.992 g/mol), and 25 will be Neon-22 (21.991 g/mol), then the average atomic mass of Neon20.1974

Atomic mass of an element can be defined as the total number of neutrons and protons present in the nucleus of an atom and the  atomic number is the number of protons present in  nucleus.

the average weight of an element is called as atomic mass while atomic number is total number of protons present in the central nucleus of the atom. Atomic mass is presented a symbolic representation of A where as atomic number is represented by the letter Z.

Atomic mass can not classified  which type of element where as Atomic number classify and identify the type of element, there are different types of isotopes of an element observed on the basis of their atomic mass where as isotopes only share the same atomic number.

Neon has two isotopes such as , N e 20, N e 21 and N e 22.The average atomic mass can be calculated as:

N e  Average atomic mass = [ 19.9924 (90.92 %)] + [ 20.9940 (0.257 %)] + [ 21.9914 (8.82 %)] a m u

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Answer:

Away from the sun

Explanation:

winter

In the Northern Hemisphere, winter generally begins on December 21 or 22. This is the winter solstice, the day of the year with the shortest period of daylight. Summer begins on June 20 or 21, the summer solstice, which has the most daylight of any day in the year.

Answer:

using one or more of your senses is Observing

Answer: 3.45

Explanation:

Answer:

dude your handwriting!!!