What is the mole ratio of NH3 to N2?

Answer:

0.25M

Explanation:

The formula of concentration is c=m/M•V

c=1.85g/74g.mol•0.10L

c=0.25 M

Its option e

Why?

[tex]\\ \sf\longmapsto 0.000354\times 10^4[/tex]

It can be written as

[tex]\\ \sf\longmapsto \dfrac{354}{10000}\times 10^4[/tex]

[tex]\\ \sf\longmapsto \dfrac{354}{10^4}\times 10^4[/tex]

[tex]\\ \sf\longmapsto 354[/tex]

Hence its wrongly written

d is also wrong

[tex]\\ \sf\longmapsto 75.3\times 10^2[/tex]

[tex]\\ \sf\longmapsto \dfrac{753}{10}\times 100[/tex]

[tex]\\ \sf\longmapsto 7530[/tex]

We want to perform some changes of units, such that the number of significant figures (the ones different than zero) does not change.

a) 75 cm to ft

We know that:

1ft = 30.48cm

1 = (1ft)/(30.48cm)

Now, remember that if we multiply a quantity by one we do not affect the quantity, so we can write:

75cm = 75cm*(1ft)/(30.48cm) = 2.5 ft

b)  0.668 kg to lb

we know that:

1kg = 2.20462 lb

then:

1 = (2.20462 lb)/(1kg)

0.668 kg = 0.668 kg*(2.20462 lb)/(1kg) = 1.47 lb

c)  0.549 uL to qt

We know that:

1 uL = 3.437*10^-9 qt

1 = (3.437*10^-9 qt)/(1 uL)

Then:

0.549 uL = 0.549 uL*(3.437*10^-9 qt)/(1 uL) = 1.91*10^-9 qt

d) 9.991 mm to km

we know that:

1mm = 1*10^-6 km

then:

1 = (1*10^-6 km)/(1mm)

So we can rewrite:

9.991 mm = 9.991 mm*(1*10^-6 km)/(1mm) = 9.991*10^-6 km

e)  313 nm to mm

We have:

1nm = 1*10^-6 mm

1 = ( 1*10^-6 mm)/(1 nm)

Then:

313 nm*( 1*10^-6 mm)/(1 nm) = 3.13*10^-4 mm

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Answer:

The answer for this is (B: Heat)

Answer:

(1760 ÷ 64) x 24.4 =671dm^3

Answer:

A. elements

I hope it's helps you

Answer:

A i think

Explanation:

Answer:

the importance of the periodic table are,

To summarize, the periodic table is important because it is organized to provide a great deal of information about elements and how they relate to one another in one easy-to-use reference. The table can be used to predict the properties of elements, even those that have not yet been discovered.

Explanation:

hope its help for you

thank you

have nice day

Answer: Sound

Explanation:

Answer:

(a)572.2ml

(b)54000cm

Explanation:

(a) 1 l = 1000 ml

0.5722 l =?

=572.2 ml

(b) 1m = 100cm

540m=?

=54000cm

The various units like liter, meter, and kilogram are used to measure the objects and matter. 0.5722 L is equivalent to 572.2ml and 540.0 m is equivalent to 54000cm.

Unit of measurements are magnitudes used to estimate the quantity of the matter and includes seven fundamental units, including meter, kilogram, seconds, candela, mole, kelvin, and ampere.

The fundamental units can be used to define other measurements that are called derived units, like volume, density, etc. The unit can be converted into various metric systems.

Unit conversions are done as:

0.5722 L = X mL

X = (0.5722 L × 1000 mL) ÷ 1 L

= 572.2 mL

540 m = X cm

X = (540 m × 100 cm) ÷ 1 m

= 54000cm

Therefore, 0.5722 L = 572.2 mL, and 540.0 m = 54000 cm.

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Answer:

he formula mass of ammonia is 14 + 1 3 = 17. The number of moles in 36 g ammonia is 36/ 17 = 2.11mol. A mole is 6.02 10, so the number of hydrogen atoms in a 2.11 moles of ammonia is 2.11 *6.02*10^23 = 1.27 *10^24 atoms

Explanation:

Answer:

3.50 mol x 6.022 x 10^23

= 2.11 x 10^24 carbon atoms

Explanation:

1. moles = grams/molar mass

2. (mass nitrogen/mass amm sulfide)*100 = ??

3. mass Hg = volume x density

Then convert to moles.

Then remember there are 6.022E23 atoms for every mole.

Answer:

c

Explanation:

esuba is activation energy

eu vou colocar V(verdadeiro) F (falso)

1:F  

2:F

3: V

4:F

explicação:

1 procariontes não apresentam núcleo

2 eles podem sim caso  contrário os seres procariontes não sobreviveriam

3   ele possui organelas celulares

4 as células eucariontes são maiores e mais complexas.

CONCLUSÃO: a resposta certa é a 3

Answer:

potassium cyanide, dinitrogen monoxide, aluminum nitrate

Explanation:

1. C

2. B

3. B

4. sorry, but we cant see the pictures. thats all I can do.

-Chad

Answer:

(1) Turgor, an internalstimulus, refers to energy in a plant cell.

(2) Osmosis moves materials in and out of the plant cell from areas of low to high concentration?

(3) When a plant is hypertonic,what is happening in the plantcell, and what will the plantlook like?

→ A. The vacuole is not full and the plant is wilted.

(4) What picture at the bottom of the page represents equilibrium orbalance in a cell?

→ Sorry the picture is not given

The first quarter moon occurs halfway between new moon and full moon.

From our perspective, the moon is partially lighted and is 90 degrees away from the sun in the sky.

We refer to it as the "first quarter" since the moon has only circled the Earth once since the new moon.

From Earth, you can view one-quarter of the moon, or half of the moon's illuminated side, which seems to be one-half of a pie.

Therefore, The first quarter moon occurs halfway between new moon and full moon.

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Answer: Hello There!................

Separating funnuel. AND

Explanation:

Carbon tetrachloride and water are separated by using a separating funnel. Carbon tetrachloride and water are imiscible with each other. Hence, they form two layers. The density of carbon tetrachloride is more dense than water and forms lower layer. Water being less dense, forms upper layer.

Mark me brainest please. Hope this helps. Anna ♥

The following are the correct decisions;

1) Chemical property

2) Physical property

3) Chemical property

The question is incomplete, the complete question is;

Experiments were done on a certain pure substance X to determine some of its properties. There's a description of each experiment in the table below. In each case, decide whether the property measured was a chemical or physical property of X, if you can. If you don't have enough information to decide, choose can't decide in the third column. property experiment physical or chemical? Х O physical 0 A sample of solid X is carefully weighed and put inside a vented flask. The flask is heated until oxygen gas starts being produced. After no more oxygen gas is produced, the contents of the flask are removed and weighed, and from the decrease in weight the value of O may be calculated. O chemical O (can't decide) O physical V A sample of X is melted and put into a reservoir from which a very thin tube leads down. The rate at which X flows out of the tube is measured, and from this rate the value of V may be calculated. chemical (can't decide) O physical Q A sample of solid X is carefully weighed and put inside a sealed flask. Pure hydrogen gas is added to the flask, and the mixture heated until the hydrogen starts being consumed. After hydrogen stops being consumed, the contents of the flask are removed and weighed, and from the increase in weight the value of may be calculated. O chemical O (can't decide)

A chemical property is one in which atoms of a substances are rearranged in the process. In the first case, the substance was heated and oxygen was produced. This is a decomposition reaction hence it is a chemical property that is being measured.

In the second case, the molten substance is made to flow and the flow rate is measured. The flow rate of a substance is a physical property.

In the third case, hydrogen combines with an element in the flask. This is a chemical property.

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Explanation:

1 sugar solution =Distillation

2 Iron powder and sand=magnetic separation

3 petrol and diesel= Fractional distillation

4 Camphor and glass powder = Sublimation

Answer:

A) 14,500 kPa

B)  6 atm

C)  23.443 atm

D)  898.6  mmHg

Explanation:

Answer:

because mixed particles are invisible in this mixture.

Answer:

electrons gain energy

Explanation:

Answer:

The dependant variable

Explanation:

The dependent variable is the factor that is being tested and measured in an experiment.

Answer:

d.MgNa2+Cl2S

Explanation:

the reaction should balance on both sides

Answer:

2160 days divided by 365 days which is a year is equal to about 5.9 years in school * sighhh*

5.91780821918

Answer:

15 meters = 590,551 inches

Answer:

The energy stored within things :)

Taking into account the definition of density and change of units, if a container is strong enough to hold 62.0 pounds (lb) of gasoline, you can put 10.3184 gallons in there.  

First you must know that density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space.

In other words, density is the relationship between the weight (mass) of a substance and the volume it occupies (that same substance). Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

[tex]density=\frac{mass}{volume}[/tex]

On the other side, the rule of three is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them.

That is, what is intended with it is to find the fourth term of a proportion knowing the other three.  

If the relationship between the magnitudes is direct, that is, when one magnitude increases, so does the other (or when one magnitude decreases, so does the other) , the direct rule of three must be applied.

To solve a direct rule of three, the following formula must be followed, where a, b and c are known values ​​and x is the value to be calculated:

a ⇒ b

c ⇒ x

So, [tex]x=\frac{cxb}{a}[/tex]

The direct rule of three is the rule applied in this case where there is a change of units. To perform conversion of units from pounds to grams, you must first know that 1 lb = 453.59 g. So, if 453.59 g is 1 lb, how many grams equals 62 lb?

[tex]mass= \frac{62 lbx453.59 g}{1 lb}[/tex]

Solving:

mass= 28122.58 grams

Then, you know:

Replacing in the definition of density:

[tex]0.720\frac{g}{cm^{3} }=\frac{28122.58 g}{volume}[/tex]

Solving:

volume×0.720 [tex]\frac{g}{cm^{3} }[/tex]= 28122.58 g

[tex]volume=\frac{28122.58 g}{0.720\frac{g}{cm^{3} }}[/tex]

volume= 39059.14 cm³= 39059.14 mL= 39.05914 L (being 1 cm³= 1 mL= 0.001 L)

Now, to perform conversion of units from L to qt, you must first know that 1 qt = 0.94635 L. So, if 1 qt is 0.94635 L, how many qt equals 39.05914 L?

[tex]volume= \frac{39.05914 Lx1 qt}{0.94635 L}[/tex]

Solving:

volume= 41.2735 qt

Finally, to perform conversion of units from qt to gal, you must first know that 1 gal = 4.0000 qt. So, if 1 gal is 4 qt, how many gal equals 41.2735 qt?

[tex]volume= \frac{41.2735 qtx1 gal}{4 qt}[/tex]

Solving:

volume= 10.3184 gal

In summary,  if a container is strong enough to hold 62.0 pounds (lb) of gasoline, you can put 10.3184 gallons in there.  

Learn more about density:

Answer:

[tex]because \: e = p \\ but \: e < p \\ therefore \: (c) \: is \: the \: right \: answer[/tex]