According to the law of conservation of mass, how much mercury was present in the mercury (II) oxide? *

Answer:

c.O

Explanation:

From the periodic table:

Ionization energy tends to increase from IE6 → IE7 drastically at 13329 to 71345. Hence, from this process, we can infer that the removal of electrons takes place from the inner shell which in turn has a higher affinity for the nucleus. This must be oxygen because oxygen contains 6 valence electrons. The removal of this valence electron after the sixth ionization results in the achievement of a stable nearest Noble gas configuration. Hence, the rapid change in the ionization is obvious from IE6 to IE7.

Thus, the element that relates to the IE trend is oxygen.

Answer:

6.21

Explanation:

Answer:

6.21371192 or ~ 6.21

Explanation:

10 kilometers is the same as 6.21371192 miles or ~ 6.21

All you need to do is divide the value of the kilometers by "1.609344" to convert it, into miles

Hope this helped!

Have a supercalifragilisticexpialidocious day!

I dont knowExplanation:

Answer:

Freeze

Condense

Melt

Sublime

Explanation:

Answer:

Double decomposition reaction

Explanation:

The reactants potassium iodide and lead nitrate react to from potassium nitrate and lead iodide, From this it is clear that, radicals are intercharged by the decomposition of reactants. Hence, it is a double decomposition reaction.

Answer:

e. C2+

Explanation:

In the molecular orbital theory, the valence electrons in molecules are filled into molecular orbitals in accordance with Hund's rule and Pauli exclusion theory.

The orbitals are filled in order of increasing energy (Aufbau principle) as shown in the question. The bond order refers to half the difference between the number of bonding and antibonding electrons in the molecule.

The smaller the bond order the longer the bond length and vice versa. The specie having the least bond order is C2+ with a bond order of 1.5. This specie certainly has the longest bond length also. Hence the answer.

Applying molecular orbital theory the dicarbon specie that has the longest bond length is ; ( E )  C₂⁺

The valence electrons in molecules fill up molecular orbits in accordance to Pauli exclusion theory  and Hund's  rule.  while

The bond order is the difference between bonding and antibonding electrons found in a molecule divided into half. while the molecule orbitals are filled according to increasing energy in accordance to Aufbau principle

The bond order of a molecule is inversely proportional to the bond length of the molecule. Therefore the dicarbon specie that has the longest bond length is C₂⁺ because it has the shortest bond length of approximately 1.5.

Hence we can conclude that Applying molecular orbital theory the dicarbon specie that has the longest bond length is ; ( E )  C₂⁺

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Answer: 8.69 g/mL

Explanation:

Answer:

Density = 8.69g/mL

Explanation:

Density = Mass/Volume

Density = 30.4g/3.5mL

Answer:

C. Chemical Energy

Explanation:

The energy that stored in the substance or in compounds is called chemical energy which released when the substance reacts.

A substance is made up of atoms and molecules and chemical energy is present in those atoms or molecules. When a chemical reaction takes place, these energy released from atoms and molecules.

Chemical energy can be released in the form of  thermal energy (heat) and mechanical energy (working ability).

Hence, the correct answer is "C. Chemical Energy".

The absolute age of an igneous rock can best be determined by measuring the amounts of radioactive isotopes in the rock. Option A is correct.

Igneous rock is formed and arises as a result of the cooling and solidification of the molten magma underneath the earth surface.

Igneous rock can best be determined by measuring the amounts of radioactive isotopes present in the rock because this will be used for radiometric dating which will eventually determine the absolute age of the igneous rock.

Learn more about radioactive isotopes here:

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Answer:

(2H2O)=5.6mol

Explanation:

45.2g produce x mole of CH4

we are given the mass of methane

mass (CH4)=45.2g

molar mass (CH4) = 12+4 =16g/mol

Mole=mass

molar mass

mole=45.2

16

mole=2.8mol

therefore, if 45.2g produce 2.8mol as 1 mole of methane, the water produced is 2(2.8) we Are multiplying by 2 because the water is having 2 moles water mole is 5.6mol

Answer:

8

Explanation:

Inside this shell

In p orbital there r 6 electrons

And in s orbital thr is 2

Add them

Na, C, and O so the answer is c. 3

Answer:

a) m = 7.9 g

b) m = 3.002 g

c) butyl MgBr

Explanation:

First, you are not providing the reaction, so if difficult to solve this without it. However, I manage to find a similar question so I'm gonna solve this on basis with that question. The picture attached has the question and reaction.

Now, according to the image we have a wittig reaction. Which is commonly used to convert an aldehyde into an alcohol. As we can see in the picture, the reaction starts with hexanal and butyl MgBr (Grignard reagent) in acid medium. This gives as a product the 5-pentanol.

Let's write again the reaction here:

C₆H₁₂O + C₄H₉MgBr -----------> C₁₀H₂₂O + OHMgBr

We can see that the reaction is perfectly balanced so we don't need to balance. And we also can see that we have a mole ratio of 1:1 between the reactants and the products, which means that the calculated moles of either one reactant or the other, would be the same moles of the products.

To calculate moles, and afterward, the yield, we need the molecular weight of all compounds:

MM C₆H₁₂O = 100 g/mol

MM C₄H₉MgBr = 161.32 g/mol

MM C₁₀H₂₂O = 158 g/mol

With this given MM, let's calculate the theorical yield of the product in each case:

a) 5 grams of aldehyde

In this case, let's calculate the moles of the given aldehyde:

moles = 5 / 100 = 0.05 moles

Assuming this is the limiting reagent, the moles of the aldehyde would be the same moles of the product, so:

moles aldehyde = moles product = 0.05 moles

So the theorical yield would be:

m product = 0.05 * 158

b) 3 grams of butyl MgBr

In this case, we will do the same thing as before, and we will assume that this is limiting reagent so:

moles = 3 / 161.32 = 0.019 moles

m C₁₀H₂₂O = 0.019 * 158

c) limiting reagent

Now this is easier, because if we have 5 g of aldehyde and 3 g of grignard reagent, we already has the moles of each with these masses, therefore, as both starting materials have a 1:1 mole ratio, we can see that the moles of the aldehyde are higher than the moles of grignard agent, therefore, the limiting reagent would be the butyl MgBr while the aldehyde would be the excess.

Hope this helps

Answer:

The glucose urine test measures the amount of sugar (glucose) in a urine sample.

Answer:

n = 2.58 mol

Explanation:

Given data:

Number of moles of argon = ?

Volume occupy = 58 L

Temperature = 273.15 K

Pressure = 1 atm

Solution:

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

1 atm × 58 L = n × 0.0821 atm.L/ mol.K × 273.15 K

58 atm.L = n × 22.43 atm.L/ mol.

n = 58 atm.L / 22.43 atm.L/ mol

n = 2.58 mol

yes they doExplanation:

Answer:

yes they do get there energy From the sun everything does

Answer:

yes

Explanation:

the answer is yes

Answer:

9.11 L

Explanation:

An arctic weather balloon is filled with 10.2 L of helium gas inside a prep shed. The temperature inside the shed is 9 °C. The balloon is then taken outside, where the temperature is -21 °C. Calculate the new volume of the balloon. You may assume the pressure on the balloon stays constant at exactly 1 atm. Round your answer to 3 significant digits.

Step 1: Given data

Step 2: Convert the temperatures to the Kelvin scale

We will use the following expression.

K = °C + 273.15

K = 9 °C + 273.15 = 282 K

K = -21 °C + 273.15 = 252 K

Step 3: Calculate the final volume of the balloon

We can calculate the final volume of the balloon using Charle's law.

V₁/T₁ = V₂/T₂

V₂ = V₁ × T₂/T₁

V₂ = 10.2 L × 252 K/282 K = 9.11 L

......what is that 2 after =

Explanation:

It is also important to note that potential energy can be positive, zero or negative. ... Now that the kinetic energy and potential energy have been defined, we can now apply the Law of Conservation of Energy. In other words, the kinetic energy plus the potential energy equals a constant (KE+PE=Constant).

Answer: It's six, I believe.

Explanation:

Answer:

it is NaBr. It is known as sodium bromide.

Answer:

Hope it helps

Explanation:

Answer:

A.Lithium (Li)

since fluorine and nitrogen gain electron and becomes negative ion.

since magnesium loose two electron.

Answer:   false

Explanation:

Answer:

solid

Explanation:

If you were to leave the gallium in the interior of the car at those temperatures the gallium would still be in a solid physical state when you return. This is because the temperature in Fahrenheit when you return is 85.08F which converted to Celsius would equal 29.488C. This is close to Gallium's melting of 29.768C point but does not exceed it, meaning that it is close to melting but has not yet done so and is, therefore, still a solid.

Answer:

Explanation:

B

Answer:

[H⁺] = 3.98×10⁻⁷ M

Explanation:

Given data:

pH of blood = 6.40

Hydrogen ion concentration = ?

Solution:

Formula:

pH = - log[H⁺]

by rearranging this formula,

[H⁺] =  10⁻(pH)

By putting values,

[H⁺] = 10 ⁻⁶°⁴⁰

[H⁺] = 3.98×10⁻⁷ M

The concentration of mixed solution = 0.5 M

Given

0.5 M H₂SO₄

0.5 M NaOH

Required

The concentration

Solution

Molarity from 2 solutions :

Vm Mm = V₁. M₁ + V₂. M₂  

m = mixed solution

V = volume

M = molarity

V = mixed volume  

1 = solution 1

2 = solution 2

Vm = V₁+V₂

Equal volumes⇒V₁=V₂, and Vm = 2V, then equation becomes :

2V.Mm = V(M₁+M₂)

2V.Mm = V(0.5+0.5)

Mm=0.5 M

Answer:

the answer is nitrogen and rubidium (C)

Explanation:

ionic bonds only form between metals and non-metals

Answer:

 to locate and possibly retrieve the buses

Explanation:

The buses are presumed to be made of steel. Presumably, a bus and the magnet are mutually attractive. The magnet could be used to locate a missing bus, and possibly retrieve it.