answer choices
a. 13
b. 15
c. 28
d. 30
:))

Answer:

False

Explanation:

A phenotype is physical characteristics, like eye color, and genotype is the code (tt, Tt, TT, that sort of thing) for it. A genotype can be dominant or recessive, dominant is capita, recessive is lowercase.

Answer:

I would say A.

Explanation:

Answer:

The mass of 8.50 × 10²² NH₃ molecules is ≈ 1.84 g.

One mole of a molecule contains 6.02 × 10²³ molecules. The mass of  8.50 × 10²² molecules of NH₃ is 2.39 g.

Ammonia is an inorganic compound formed by hydrogen and nitrogen. Ammonia exists in gaseous state.

One mole of every element or compound contains 6.02 × 10²³ molecules. This number is called Avogadro number. The molar mass of ammonia is 17 g/l

It is given that the number of molecules of ammonia here, is 8.50 × 10²².

The no.of moles of ammonia = 8.50 × 10²²/ 6.02 × 10²³

                                                = 0.141 moles.

If one mole ammonia is 17 g/l, the mass of 0.141 moles of NH₃ is calculated as follows: 0.141 × 17 = 2.39 g. Hence the mass of NH3 which contains 8.50 × 10²² molecules is 2.39 g.

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The final temperature : 191.54 K = -81.46 °C

Given

V₁=3.2 L

T₁ = 125 +273 = 398 K

V₂=1.54 L

Required

The final temperature(T₂)

Solution

Charles's Law  

When the gas pressure is kept constant, the gas volume is proportional to the temperature  

[tex]\tt \dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}[/tex]

T₂=(V₂T₁)/V₁

T₂=(1.54 x 398)/3.2

T₂=191.54 K = -81.46 °C

Answer:

[tex]C=0.662\frac{J}{g\°C}[/tex]

Explanation:

Hello!

In this case, since the heat removal when cooling down a body is computed via:

[tex]Q=mC\Delta T[/tex]

Given the removed heat, mass and temperature change, we solve for the heat capacity of the metal as shown below:

[tex]C=\frac{Q}{m\Delta T}[/tex]

Thus, by plugging in we obtain:

[tex]C=\frac{-68.5J}{4.5g*(25-48)\°C} \\\\C=0.662\frac{J}{g\°C}[/tex]

Best regards!

Answer:

hello your question is incomplete attached below is the complete question

answer :

Fe2O3 = 159 g/mol

CO = 28.01 g/mol

Fe = 55.85 g/mol

CO2 = 44.01 g/mol

Explanation:

       Fe = 55.85 g/mol

       O = 16.0 g/mol

       hence the molar mass of Fe2O3 = 2(55.85) + 3(16) = 159 g/mol

        C = 12.01 g/mol

        O = 16.0 g/mol

        hence the molar mass of CO = 28.01 g/mol

        Fe = 55.85 g/mol

        C = 12.01 g/mol

        O = 16.0 g/mol

        hence the molar mass of CO2 = 12.01 + 2(16) = 44.01 g/mol

Answer:

There ya go ;)

Explanation:

Answer:

4.000 (A)

Explanation:

Answer:

The space shuttle was the result of committee compromise and political expediency. It was never the best design. It takes off like a rocket (and blows up like one on occasion) and lands like a plane (or rather, it lands like a brick with control surfaces).

Explanation:

Answer:

The space shuttle was the result of committee compromise and political expediency. In 1990 Scientists decided to launch the space shuttle. It was never the best design. It takes off like a rocket (and blows up like one on occasion) and lands like a plane (or rather, it lands like a brick with control surfaces).

Answer:

The answer is Condensation which is water vapor in the air changes inot liquid water

Answer:

an electrical generator

Answer:

Explanation:

Out of four given compounds , two will show cis-trans isomerism .

They are as follows ,

[Pt(NH₃)₂Cl₂]

and

[Cr(NH₃)₄Cl₂]+

see the attached file.

Answer:

No necessarily it depends on if current is flowing through it.

Answer:D

Explanation:

Answer:

Enthalpy change is negative

Entropy change is Positive

Explanation:

Answer:

d beacuse it uses lots of electricity

Basically, carbon (C2) burns in the presence of adequate Oxygen (O2) to form carbon dioxide. Carbon is Quadro valent and is able to accept four more electrons. Oxygen has two electrons and hence, readily reacts with carbon to help break and make bonds. The chemical equation of carbon dioxide (CO2) is

carbon + oxygen → carbon dioxide or C2 + O2 = CO2

Answer:

C

Explanation:

Because it is the question that represents than carbon in the presence of oxygen give carbon dioxide.

Answer:

80.0 grams NaOH

Explanation:

500 mL = 0.500 L

M = moles / liters

4 M =    x moles / 0.500 L

Multiply both sides by 0.500 L

2 moles = x

Convert moles to grams

2 moles NaOH x (39.998 grams NaOH / 1 mole) = 80.0 grams NaOH

Answer:

yeah why?

Explanation:

Answer:

lungs

Explanation:

they don't have gills, and the milk producing glands and watertight eggs have nothing to do with it

Answer:

lungs

Explanation:

dolphins are mammals not fish

Answer:

Lunar eclipse answer is

b

Answer:

Solubility

Explanation:

Answer:

248 mL of 5% w/v boric acid solution should be used to obtain the solution needed.

Explanation:

We can calculate the volume of the 5% w/v boric acid solution needed to prepare the buffer solution 1.24% w/v using the following equation:

[tex] C_{i}V_{i} = C_{f}V_{f} [/tex]

Where:

[tex]C_{i}[/tex]: is the concentration of the initial solution = 5% w/v

[tex]C_{f}[/tex]: is the concentration of the final solution = 1.24% w/v

[tex]V_{i}[/tex]: is the volume of the initial solution =?

[tex]V_{f}[/tex]: is the volume of the final solution = 1 L

Hence, the volume of the 5% solution is:

[tex] V_{i} = \frac{C_{f}V_{f}}{C_{i}} = \frac{1.24 \%*1 L}{5 \%} = 0.248 L = 248 mL [/tex]

Therefore, 248 mL of 5% w/v boric acid solution should be used to obtain the solution needed.

I hope it helps you!                  

Density is defined as the mass per unit volume it means that mass present in 1 meter cube. The S.I unit of density is kg/m^3 and in C.G.S and it is gram/cm^3

Density is defined as the mass per unit volume it means that mass present in 1 meter cube. The S.I unit of density is kg/m^3 and in C.G.S and it is gram/cm^3

In above statement we can understand that density, mass, and volume all are convert to each other it means that if we know any two variable then third one will be calculated easily.

Mathematically,

Formula for density will be as mentioned below:-

Density = Mass/Volume.

From above formula we can calculate mass which is as follows:-

Mass = Volume × Density.

S.I unit of mass is kilograms and C.G.S unit is gram.

And similarly we can calculate the volume which is equal to as follows:-

Volume = mass / density.

S.I unit of volume is meter cube and C.G.S unit is cubic centimeter.

So, we can say that mass, volume and density all are dependent to each other and if any two is known we can easily calculate the third one.

Therefore, Density is defined as the mass per unit volume it means that mass present in 1 meter cube. The S.I unit of density is kg/m^3 and in C.G.S and it is gram/cm^3.

Learn more about density here:

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Answer:

the frequency of light is

[tex]4.74 \times {10}^{14} [/tex]

Explanation:

from v = λf

speed of light in air, v = 3.0*10^8ms^-1

Answer:

Arsenic

Explanation:

From the introduction given in the question, the element we are considering must be a member of group 15 because of its similarity to nitrogen.

We were also told that it exhibits the characteristics of metals and some nonmetals hence the element is a metalloid.

Lastly we were told that it contains 3d but not 4d electrons. This has ruled out  antimony. Our only element standing now is arsenic!

The electronic configuration of arsenic is; [Ar] 3d¹⁰ 4s² 4p³. Hence the correct answer is arsenic.

Answer:

A

Explanation:

Answer:

30 mph

Explanation: