Conversion factors:

1000 mL per L
1000 ug per mg
A certain atmospheric sample contains 1.01 x 10-4 mg of some contaminant per mL of air. This passes through an airlock, into some Mars colony lander with a volume of 2.28 x 104 L. 401 people are living and working inside. Assuming equal exposure among every person how many micrograms of contaminant will each person receive?

Answer:

Reactants are on left side ( Hydrogen + oxygen).

products are on right side (Water)

Explanation:

Things that go into reaction are called reactants.

things that go out of reaction are called products.

No. of Neutrons:    6

No. of Protons:      6

Atomic number:    6

Mass No:               12.011 u

The u means atomic mass unit.

Answer:

Everything is 6 except for mass number

Explanation:

neutron is 6

proton number is 6

atomic number is 6

mass number is 12.011 atomic mass units

The percent by mass of 110.6 g of potassium fluoride (NaF) dissolved in 1500.0 g of water is 0.073733 %.

The mass percent of a solution is defined as the ratio of the mass of solute that is present in a solution, relative to the mass of the solution, as a whole.

[tex]\rm\;Mass \;percentage =\frac{\;Mass \;of \;solute}{\;Mass \;of \;solution}[/tex]

Calculate the mass percent of potassium fluoride, using the formula:

[tex]\rm\;Mass \;percentage =\frac{\;Potassium \;fluoride}{\;Mass \;of \;Water}[/tex]

[tex]\rm\;Mass \;percentage =\frac{110.6}{1500.0}[/tex]

Mass percentage = 0.073733 %

Hence,  the percent by mass of 110.6 g of potassium fluoride (NaF) dissolved in 1500.0 g of water is 0.073733 %.

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Answer:

Depends on what the answers say.

Explanation:

But from what I know, the equation is:

6CO2 + 6H2O------> C6H12O6 + 6O2

And also that arrow there should mean in the presence of sunlight and chlorophyll.

The products obtained when Calcium Carbonate reacts with Silver Sulfate  is Calcium Sulfate and Silver Carbonate , CaSO₄ + Ag₂CO₃

The reactions in which two compounds react by an exchange of ions to form two new compounds are called double displacement reactions.

Many double displacement reactions occur between ionic compounds that are dissolved in water.

In a double displacement reaction, atoms from two different compounds switch places.

The reactants are two compounds and the products are two different compounds.

The reaction given below is an example of Double Dispalcement Reaction

CaCO₃ + Ag₂SO₄ → CaSO₄ + Ag₂CO₃

1 mole of Calcium Carbonate reacts with Silver Sulfate  to form  1 mole of Calcium Sulfate and Silver Carbonate , CaSO₄ + Ag₂CO₃.

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Answer:

Green=2.81

Yellow=10^-5

Explanation:

It is the correct answer. the exponent power will become 10^-4 without any calculations

Answer:

120.3676 g/mol

Science!

[tex]1.409 \times {10}^{24} \: \: atoms[/tex]

Explanation:

Convert from moles to atoms:

2.34 mol titanium (Ti)

Determine the amount of substance, n:

n = 2.34 mol

Look up Avogadro's constant, [tex] N_A[/tex] , to find the number of atoms in a mole:

[tex] N_A[/tex] = 6.022×10^23 atoms/mol

Multiply n by [tex] N_A[/tex] to convert to the number of atoms, [tex]N_{atoms}[/tex]:

Precise Answer:

[tex] N_{atoms} [/tex] = n× [tex] N_A [/tex]= (2.34 mol)/1×(6.022×10^23 atoms)/(1 mol) = 1.409×10^24 atoms

Answer:

N₂O₅ + H₂O --> 2HNO₃

This reaction is a combination reaction

Explanation:

I find that making a table is an easy way to balance a table. The table would be something like this:

Reactants (left) Products (right)

N = 2 N = 1

O = 6 O = 3

H = 2 H = 1

The number next the symbol represents how many of atoms of that particular element are present.

The aim is to make the number of atoms of each element on the left side to be equal to the number of atoms of each element on the right side. As we can see, there are 1 more nitrogen than on the right, 3 more oxygen than on the right and 1 more hydrogen than on the left.

So to make the numbers of atoms of each element on right equal to the number of atoms of each element on the left, we have to add a number. This number CANNOT be a subscript number because that would change the reaction.

We can add a 2 in front of the product (this is because there are less atoms in the right side of the equation).

N₂O₅ + H₂O --> 2HNO₃

This means there are now two HNO₃ molecules so every atom in this molecule is basically multiplied by 2. So 1 nitrogen atom becomes two (1 × 2 = 2), 3 oxygen atoms become 6 (3 × 2 = 6) and 1 hydrogen atom becomes 2 (1 × 2 = 2). If we were to make a table again with the following equation - N₂O₅ + H₂O --> 2HNO₃, the table would be as so:

Reactants (left) Products (right)

N = 2 N = 2

O = 6 O = 6

H = 2 H = 2

Now the equation is balanced as we can see the number each type of atom is the same on the right and left side.

Answer:

As Earth cooled, an atmosphere formed mainly from gases spewed from volcanoes.

Explanation:

Answer:

A

Explanation:

The forward reaction would be favoured as the increase in temperature would cause more heat for the reaction to absorb so the endothermic reaction would be increased.

Answer:

13. 8 hrs

12. 8.89 meters per second squared

11. -0.75 meters per second squared

The mass of the gas dissolved in 1.00 L of water at 25°C and 3.0 atm is equal to 1.26 grams.

In order to determine the mass of the gas dissolved, we would the calculate the new (final) solubility of this gas by applying this formula:

S₁P₂ = S₂P₁

Making S₂ the subject of formula, we have:

S₂ = (S₁P₂)/P₁

S₂ = (0.42 × 3.0)/1.0

S₂ = 1.26 g/L.

Now, we can determine the mass:

Mass = solubility × volume

Mass = 1.26 × 1.00

Mass = 1.26 grams.

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Boyle's Law

P₁V₁=P₂V₂

6.9 = P₂.12

P₂ = 4.5 atm

The condensed structure of given compounds are shown in the below image.

Functional group is the specific group which is present in an organic compound gives information about the properties of that compound.

Hence, structure of the given compounds are shown in the below image.

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Answer:

p= 4

e=4

n=5

Explanation:

hope this helps

Answer:

Wetlands are from being useless, disease-ridden places, wetlands provide values that no other ecosystem can. These include natural water quality improvement, flood protection, shoreline erosion control, opportunities for recreation and aesthetic appreciation and natural products for our use at no cost. Removal of the wetlands can result in fish disease, dominance of acid-tolerant species, contamination of groundwater, reduction in agricultural productivity and damage to infrastructure through corrosion. The loss of the wetlands introduces invasive species, either intentionally or unintentionally, these species can put pressure on native plants and eventually push them out of their native habitat.

Wetlands are from being useless, disease-ridden places, wetlands provide values that no other ecosystem can. These include natural water quality improvement, flood protection, shoreline erosion control, opportunities for recreation and aesthetic appreciation, and natural products for our use at no cost.

Removal of the wetlands can result in fish disease, the dominance of acid-tolerant species, contamination of groundwater, reduction in agricultural productivity, and damage to infrastructure through corrosion.

In the last three decades alone, nearly one-third of natural wetlands have been lost to urbanization, agriculture expansion, and pollution. The loss of wetlands in urban areas has been more rapid.

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Answer:

282420J

Explanation:

Q = mc∆T

= 1500 x 4.184 x (50 - 5)

= 282420J

Answer:

Density = 4.06 * 10^14

Explanation:

Givens

r = 1 * 10^-13 cm

m = 1.7 * 10^-24 grams

Formula

V = 4/3 * pi * r^3

D = m/V

Solution

Put the givens into the formula.

V = (4/3) 3.14 * (1 * 10^-13)^3          Find the value for r^3

V = (4/3) 3.14 * 1 * 10^-39               Find the volume. Indicate divide by 3

V = 1.256 10^-38/3

V = 4.1867 * 10^-39

Density = m / v

Density = 1.7*10^-24/4.1867*10^-39  Do the division

Density = .406 * 10^(-24 + 39)

Density = .406 * 10^15 grams/ cm^3

Answer: Density = 4.06 * 10^14

Answer:

There are 20. mol of Na2CO3 in 10.0L of 2.0M solution.

Explanation:

Molarity is represented by this equation:

(look at attachment)

In our case, we already have the molarity and volume of solution, both of which have good units.

Let's rearrange the equation to solve for the number of moles. We can do this by multiplying by L solution on both sides of the equation. The L solution will cancel out on the right side, leaving the number of moles being equal to the molarity times volume:

Moles of solute

=Lsolution×Molarity

Now we just plug the known values in!

Moles of solute = (10.0 L) (2.0M) = 20. moles

Answer:

6.25 L

Explanation:

Boyle's law says Pressure and volume are inversely related. One goes up and other goes down (vice versa).

P1 V1 = P2 V2

(2.5) (1) = (0.4) (x)

x= 6.25 L

The answer should make sense because your pressure went from high to low which means your volume should opposite, from low to high, and that's what we see.

There are so many routes by which water can move through the various stages in the water cycle.

The water cycle has to do with the route of movement of water in the enviroment. We have to note that there are so many routes by which water can move through the various stages in the water cycle.

The sun supplies the energy that drives the water cycle. This is seen in the fact that the supply of energy from the sun is required for evaporation to take place.

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Answer:

28.5 g NH₃

Explanation:

You can determine how much ammonia will form by identifying which reactant is the limiting reagent. This can be done by converting each reactant into moles, using the mole-to-mole ratio (after balancing the reaction), then converting ammonia to grams.

2 NO + 3 H₂ --> 2 NH₃ + O₂

Molar Mass (NO) = 14.01 + 16.00 = 30.01 g/mol

Molar Mass (H₂) = 2(1.008) = 2.016 g/mol

Molar Mass (NH₃) = 14.01 + 3 (1.008) = 17.034 g/mol

50.2 g NO          1 mol             2 mol NH₃            17.034 g
----------------  x  ---------------  x  --------------------  x  ----------------  =  28.5 g NH₃
                          30.01 g           2 mol NO              1 mol

15.1 g H₂             1 mol             2 mol NH₃            17.034 g
----------------  x  ---------------  x  --------------------  x  ----------------  =  85.1 g NH₃
                          2.016 g           3 mol H₂                 1 mol

Nitrogen oxide (NO) is the limiting reagent because it produces the smallest amount of product. In other words, it runs out before all of the hydrogen gas (H₂) can be used. This means that the largest amount of ammonia that can be produced is 28.5 grams.

Given the initial volume, temperature and pressure of the gas, at Standard conditions for temperature and pressure, the new volume will be 310mL.

Combined gas law put together both Boyle's Law, Charles's Law, and Gay-Lussac's Law. It states that "the ratio of the product of volume and pressure and the absolute temperature of a gas is equal to a constant.

It is expressed as;

P₁V₁/T₁ = P₂V₂/T₂

Given the data in the question;

At Standard conditions for temperature and pressure

To calculate the new volume the gas, we substitute our given values into the expression above.

P₁V₁/T₁ = P₂V₂/T₂

P₁V₁T₂ = P₂V₂T₁

V₂ = P₁V₁T₂ / P₂T₁

V₂ = ( 0.690846atm × 0.5L × 273.15K )  / ( 1.0atm × 303.15K )

V₂ = 94.3522925LatmK / 303.15atmK

V₂ = 0.31L

V₂ = 310mL

Given the initial volume, temperature and pressure of the gas, at Standard conditions for temperature and pressure, the new volume will be 310mL.

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The material which requires the most heat to raise its temperature from 10°C to 30°C is oil.

The formula which we used to calculate the amount of involved heat in relation with specific heat is:

Q = mcΔT, where

Among the given materials, specific heat of oil is highest than other materials so will require maximum absorbed heat.

Hence, oil requires the most heat.

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Answer:

They reflect 4 percent of solar radiation that reaches the surface.

Explanation:

When the sun angle is high and water is liquid notice, there is less reflection that takes place.

Answer:

its an electric circuit

Explanation:

is a pathway in which current flows through.