Lead from a car battery has been detected in a lake far from where the battery was discarded. How did the lead get there?

Answer:

C2H2 + 5 O2 = 4 CO2 + 2 H2O

Add / Edited: 27.09.2014 / 25.01.2015

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Source: https://chemiday.com/en/reaction/3-1-0-339

Explanation:

Answer:

a metal and a nonmetal element

Explanation:

Answer: 0.045 moles of [tex]F_2[/tex] will be required to  produce 3.0 grams of  [tex]KrF_6[/tex].

Explanation:

To calculate the moles :

[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]    

[tex]\text{Moles of} KrF_6=\frac{3.0g}{198g/mol}=0.015moles[/tex]

The balanced chemical equation is:

[tex]Kr+3F_2\rightarrow KrF_6[/tex]  

According to stoichiometry :

1 mole of [tex]KrF_6[/tex] is produced by = 3 moles of [tex]F_2[/tex]

Thus 0.015 moles of [tex]KrF_6[/tex] will be produced by=[tex]\frac{3}{1}\times 0.015=0.045moles[/tex]  of [tex]F_2[/tex]

Thus 0.045 moles of [tex]F_2[/tex] will be required to  produce 3.0 grams of  [tex]KrF_6[/tex].

Answer:

Strip

Explanation:

Strip mining removes Earth in long strips from the top to reveal the coal. This earth to be removed is known as 'overburden'. The overburden from the first strip is referred to as out-of-pit dumping. Strip mining is a part of surface mining.

Strip mining destroys forests, landscapes, forests and wildlife habitats as trees and plants are removed from the mining area.

Therefore,

this describes the Strip coal mine.

Answer:

strip Mining.

Explanation:

Answer:

B. Prokaryotes do NOT have a nucleus.

Answer:

A liquid is a substance that is wet and yes it can change shape and volume

Explanation:

Answer:

Explanation:

It is a decomposition although it does not look like it. What is happening is that the O3 is giving up one oxygen, and the oxygen on the right is taking on in the form of a new molecule.

Answer:

it's the third one

Explanation:

matter can't change, but mass can differ

Answer:

Explanation:

Assuming that you are asking for the full-balanced equations...

2Na + O2 = Na2O2

H2 + O2 = H2O2; This equation is already balanced, there is no need for change.  

Please let me know if this is not the answer you are looking for and I will amend the answer.

Answer:

88 g

Explanation:

32 g of CH4 react with 128 g of O2, producing 88 g of CO2.

Fluorine (F), chlorine (Cl), bromine (Br), and iodine (I) all have the same number of valence electrons.

Valence is nothing but a number of electrons in  an atom which may either lose or gain to attain the nearest noble gas or inert gas state of electronic configuration.

The valence electrons are contain more energy compared to the electrons present in inner orbits, so they are the part of chemical reaction.

The number of valence electrons of an atom helps to determine a specific chemical properties, like valence or valency, the formation of bonds with other elements, gives an idea of how readily the atoms can form bonds.

Some major characteristics of a valence electron include the valence electron exists only in the outermost electron shell,  exist in the inner shell of a transition metal, the atom with the shell of valence electrons are chemically inert, either absorb or release energy in the form of a photon, determine electrical conductivity .

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Answer:

Explanation:

The electrons in the outer shell can be stripped from their main atom more easy than the inner shell electrons.

Answer:

The two fish are of the same species because they can mate with each other. Also, the characteristics of the blind cave fish enable them to live in caves. Eyes need energy. So, developing bodies with no eyes allowed these fish to function more efficiently.

Explanation:

plato answer

Answer:

It increases.

Explanation:

I hope this helps.

Answer:

Increases

Explanation:

Hope this helps :)

Answer:

0.0997485824191857

Explanation:

Potassium in 1 mol is 39.0983.

Divide 3.9 by 39.0983.

Answer:

2.52 g of water

Explanation:

Recall that;

1 mole of water contains 6.02  * 10^23 molecules of water

x moles of water contains 8.16 * 10^22 molecules of water

x = 8.16 * 10^22 * 1/ 6.02  * 10^23

x = 1.4 * 10^-1 = 0.14 moles of water

Then;

1 mole of water = 18 g of water

0.14 moles of water = 0.14 * 18 /1 = 2.52 g of water

Answer:

7.23 x 10^24 atoms

Explanation:

Use Avogadro's number that states that there are 6.022 x 10^23 particles in one mole:

12 mol O x (6.022 x 10^23) atoms = 7.23 x 10^24 atoms

Answer:

d metallic

Explanation:

Answer:

Explanation:

Two things that can be deduced by this finding would be that the location was most likely a very muddy area with lots of clay minerals, as well as having lots of crustal movements. This is because slate is created when crustal movement buries clay minerals and other materials in the crust of the Earth. This is later melted and squeezed together from the sheer heat that is applied  being so far underground. Therefore, creating what we now know as Slate.

Answer:

True

Explanation:

There are some climates in which there are no living things. The average of the weather is the climate.

Climate is a region's averaged long-term weather pattern over a period of time, usually 30 years. More precisely, it is the average and variation of climatic variables over a period of time that can range from a few months to many millions of years.

Every element of our life is impacted by the climate, including our food supplies, transportation systems, clothing choices, and vacation destinations. It significantly affects our future, our health, and our means of subsistence. Climate is the long-term trend of the weather in any given location.

As an illustration, you can anticipate snow in the Northeast in January or hot and muggy weather in the Southeast in July. Climate is this. Extreme values, such as record-breaking high temperatures or heavy rainfall, are also part of the climatic record.

Thus, there are some climates in which there are no living things.

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Answer:

Truck crashes into a car

The boiling point of water increases as the amount of impurities dissolved in it increases. For our purposes, we will consider the non-electrolyte to be the dissolved impurity. The change in the boiling point can be calculated using the equation:

[tex]\Delta T_b = i \times K_b \times m[/tex]

where [tex]\Delta T_b[/tex] is the change in boiling point, [tex]i[/tex] is the van ‘t Hoff factor (whose value denotes the number of particles each formula unit of the dissolved substance dissociates into in water), [tex]K_b[/tex] is the boiling point elevation constant, and [tex]m[/tex] is the molality (moles of solute/kilogram of solvent) of the solution.

Right off the bat, since we're dealing with a non-electrolyte, the dissolved substance can be assumed not to dissociate in water. So, our van ‘t Hoff factor, [tex]i[/tex], would be 1 (by contrast, the [tex]i[/tex] for an ionic compound like NaCl would be 2 since, in water, NaCl would dissociate into two particles: one Na⁺ ion and one Cl⁻ ion). We're also given our [tex]K_b[/tex], which is 0.51 °C/m.

Assuming the normal boiling point of pure water to be 100 °C (a defined value for sig fig purposes), the change in boiling point from having dissolved 35.0 g of the non-electrolyte can be obtained by subtracting 100 °C from the final—elevated—boiling point of 101.25 °C:

[tex]\Delta T_b = 101.25\text{ }^o\text{C} - 100\text{ }^o\text{C} = 1.25\text{ }^o\text{C}[/tex]

Now, recall what we're asked to determine: the molecular mass of the dissolved substance. There is one unknown left in the equation: the molality of the solution. Let's first solve for that:

[tex]m = \frac{\Delta T_b}{K_b} = \frac{1.25^\text{ o}\text{C}}{0.51^\text{ o}\text{C}/m} \\ m = 2.45 \text{ mol solute/kg water}.[/tex]

Notice that we didn't include the i since its value is 1.

Now, what would happen if we multiplied our molality by the mass of water we've been given? We would be left with the moles of solute. And what are we asked to find? The molecular mass, or the mass per mole. We can accomplish this in two steps. Remember to convert your mass of water to kilograms:

[tex]2.45 \text{ mol solute/kg water} \times 0.045 \text{ kg water} = 0.110 \text{ mol solute.}[/tex]

And, finally, we divide the mass of our solute by the number of moles of solute:

[tex]\frac{35.0 \text{ g solute}}{0.110 \text{ mol solute}} = 317.5 \text{ g/mol}[/tex]

Our answer to two significant figures (which is the number of sig figs to which our [tex]K_b[/tex] is given) would be 320 g/mol.

Answer:

Put simply, Asexual reproduction is reproduction without the use of gametes or the number of chromosomes being changed. So they are genetically identical creatures. Some animals include wasps,  lizards, sharks, turkeys, and sea urchins.

Sexual reproduction includes chromosomes and gametes being fused, creating genetically different offspring. Examples of creatures that reproduce sexually are humans, chickens, cow, pigs, etc.

Explanation:

Answer:

Noble gases are the least reactive, so that is He, Ne, Ar, Kr, Xe, Rn, Og.

Explanation:

Some people reacted so strongly because it went against their cultures and religious beliefs

Answer:

i believe it is mass and distance

Explanation:

i hope that was correct, good luck by the way.

Answer:

I think it's mass and distance

Answer:

B or c

Explanation:

It might bee