one product is lead iodide. The other product is ___.

Answer:

I believe that it is B

Explanation:

Answer:

Mass of ammonia produced= 34 g            

Explanation:

Given data:

Mass of ammonia produced = ?

Number of moles of nitrogen = 1.0 mol

Solution:

Chemical equation:

N₂ + 3H₂       →    2NH₃

Now we will compare the moles of ammonia and nitrogen.

                   N₂          :          NH₃

                    1           :           2

Mass of ammonia:

Mass = number of moles × molar mass

Mass =    2 mol × 17 g/mol

Mass = 34 g                  

Answer:

D :)

Explanation:

Cells die and the new cells that are being produced are replaced by new living cells. (If cell division prevented cancer, we'd all be saved by now.)

Cell division is carried to produce new identical cells to during reproduction as well to replace old and diseased cells.  Thus option C is correct.

Cell division is the process of multiplication of a cell into two identical daughter cells. Cell division is taking place in all living organism by which they reproduce and repair cells.

Cell division takes places through several stages namely,  interphase, telophase etc. There are different methods of cell division such as mitosis, meiosis, binary fission etc.

Different level of organisms follows different methods for cell division. In eukaryotes, mitosis takes place where genetically identical daughter cells are produced. It is called vegetative division.

In reproductive cell division the number of chromosomes will be reduced in daughter cell to half or that in parent cells. Thus in a cell cycle , the odl cells are replaced by new cells and identical offsprings are created by cell division. Hence, option C is correct.

To find more about cell division, refer the link below:

https://brainly.com/question/13312481

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1:The energy involved in a phase change depends on two major factors: the number and strength of bonds or force pairs. The number of bonds is proportional to the number of molecules and thus to the mass of the sample. The strength of forces depends on the type of molecules. The heat Q required to change the phase of a sample of mass m is given by

2:According to the law of conservation of energy, energy can neither be created nor destroyed but can be transformed from one form to another. Conversion of electric energy into sound energy is an example of the conservation of energy.

Explanation:

Hope it helps UvU

Answer:

It is a method used to identify a suspect.

Explanation:

DNA fingerprinting is a method used to identify an individual from a sample of DNA by looking at unique patterns in their DNA.

The molar concentration of the original HF  solution : 0.342 M

Given

31.2 ml of 0.200 M NaOH

18.2 ml of HF

Required

The molar concentration of HF

Solution

titration formula

M₁V₁n₁=M₂V₂n₂

n=acid/base valence (amount of H⁺/OH⁻, for NaOH and HF n =1)

Input the value :

[tex]\tt 0.2\times 31.2=M_2\times 18.25\\\\M_2=0.342[/tex]

Answer:

2C8H18 + 25O2 → 16CO2 + 18H2O

Explanation:

Answer:

Yes

Explanation:

Answer: both are correct

Explanation:

Mg

...

.....

......

..............

Answer:

449.5 g

Explanation:

Silver sulfate- Ag2SO4

M(Ag)=107 g/mol => M(Ag2)=214 g/mol

M(S)=32 g/mol

M(O)=16 g/mol => M(O4)=64 g/mol

M(Ag2SO4)=310 g/mol

n=1.45 mol

m(Ag2SO4)=M(Ag2SO4)*n=310 g/mol *1.45 mol= 449.5 g

Answer:

A. Chemistry can help a chef understand how to combine different ingredients in a recipe.

Explanation:

Knowing the chemical reactions between ingredients used in cooking helps chefs understand how well different ingredients would react to eachother.

*Im pretty sure this is correct.

Answer:

1 and 4

Explanation:

Answer:

1 and 4 is correct

Explanation:

(;

Answer:

3 moles of CO are needed

Explanation:

Given data:

Number of moles of CO used = ?

Mass of Fe produced = 112 g

Solution:

Chemical equation:

Fe₂O₃ + 3CO      →        2Fe + 3CO₂

Number of moles of Fe:

Number of moles = mass/ molar mass

Number of moles = 112 g/ 55.85 g/mol

Number of moles = 2.00 mol

Now we will compare the moles of iron and CO.

                   Fe        :         CO

                   2          :         3

Thus, 3 moles of CO are needed.

Explanation:

1.ca

2.H

3.O

.................

Answer:

2Na2O2 + 2H2O → 4NaOH + O2 is the balanced ver of Na2O2 + H2O - NaOH + O2

Explanation:

Answer:

B

Explanation:

Answer:

The middle hydrogen is bonded to 2

elements.

Each hydrogen must be bonded to one element which is oxygen

Answer:

A, C, and D

Explanation:

Answer:

479 grams

Explanation:

5.43 times the molar mass of CaSO4 would give us the answer.

(5.43) * (40.078 + 32.066 + 15.9994) = 478.618662 grams

Significant figures is 3, meaning we need to round it into 3 places, giving us 479 grams.

You are stirring a bowl of hot soup with a metal spoon. The spoon starts to feel warmer, this represents conduction.

One of the three primary methods for the transfer of heat energy is conduction. Radiation and convection are the other two methods through which heat is transferred. Heat energy is transferred through the mechanism of conduction when nearby atoms or molecules collide.

In liquids and solids where particles are more closely spaced, conduction happens more easily than in gases, wherein particles are more widely spaced. When there is a significant temperature differential between both the substances that are in contact, the rate of energy transfer through conduction is increased.  You are stirring a bowl of hot soup with a metal spoon. The spoon starts to feel warmer, this represents conduction.

Therefore, the correct option is option A.

To learn more about conduction, here:

https://brainly.com/question/12136944

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Answer:

Precipitates indication release of gas

Or just vapor-again indictaing release of gas

Change in melting/boiling point, change in pH

Change in temperature

Answer:

Explanation:

these signs show that the chemical reaction has taken place.

Answer:

Igneous rocks must go through the sedimentary process to change into metamorphic rocks. Igneous rocks are chemically changed into metamorphic rocks because of high temperature and pressure. Metamorphic rocks are formed from melting igneous rocks. Metamorphic rocks and igneous rocks do not follow a rock cycle.

Explanation:

hope this helps!

Answer:

C

Explanation:

It's igneous rocks must go through the sedimentary process answer thing

Answer:

I think the elements are carbon, hydrogen and oxygen but I'm not completely sure.

Explanation:

Electronic Configuration for Li: 1s²2s¹

Electronic Configuration for Cl: [Ne]3s²3p⁵

When Lithium and Chlorine bonds together, the electron in the Lithium 2s subshell will be transfered to the Chlorine 3p subshell, giving both the Lithium and Chlorine atoms a complete 1st and 3rd energy levels respectively.

Formula for Lithium chloride: LiCl.

Answer:

(a) By the ideal gas law, the temperature of the gas is approximately 423.51129 K

(b) By the Van der Waals equation, the temperature of the gas is approximately 442.00558 K

Explanation:

The given parameters are;

The mass of the methane gas, m = 60 g

The volume of the container in which the gas is placed, V = 1.00-L

The pressure of the gas in the container, P = 130 atm

The molar mass of methane, CH₄ = 16.04 g/mol

The Van der Waals Constant for Methane (CH₄) a = 2.253 atm L²·mole⁻² and b = 0.04278 L·mol⁻¹

The universal gas constant, R = 0.08206 L·atm·mol⁻¹·K⁻¹

The number of moles of methane present, n = 60.0 g/(16.04 g/mol) ≈ 3.7406 48 moles

(a) The ideal gas law is P·V = n·R·T

Where;

P = The pressure of the gas

V = The volume of the gas

R = The universal gas constant

T = The temperature of the gas

n = The number of moles of the gas

Therefore, T = P·V/n·R

By substituting the known values of the variables, we get;

T = 130×1/(3.740648 × 0.08206) ≈ 423.51129 K

The temperature of the gas, T ≈ 423.51129 K

(b) The Van der Waals equation of state;

[tex]n \cdot R \cdot T = \left (P + a \cdot \dfrac{n^2}{V^2} \right) \cdot (V - n\cdot b)[/tex]

Therefore, we have;

[tex]T = \dfrac{ \left (P + a \cdot \dfrac{n^2}{V^2} \right) \cdot (V - n\cdot b)}{n \cdot R}[/tex]

Therefore, we have;

[tex]T = \dfrac{ \left (130 + 2.253 \times \dfrac{3.740648^2}{1^2} \right) \times (1 - 3.740648\cdot 0.04278)}{3.740648 \times 0.08206} = 442.00558 \ K[/tex]

The temperature of the gas, T ≈ 442.00558 K.

Answer:

all

Explanation:

water vapor is everywhere

ice is in the freezer and hopefully you drink water.  

Answer:

A compound is a substance in which the atoms of two or more elements are chemically combined in a fixed proportion.

Explanation:

The correct answer is that a compound is a substance in which the atoms of two or more elements are chemically combined in a fixed proportion.

A compound is a substance composed of two or more kinds of atoms joined together in a definite grouping.

The properties of a compound are distinct and different from those of the individual elements that are combined in its make - up.

There are several millions of compounds known.

An element is a distinct substance that cannot be split-up into simpler substances. They are made up of only one kind of atom.

Answer: oxidation reactions

Explanation:

Answer:

152.26 mmHg

Explanation:

pv=p'v'

525× 25=p'×86.2

p'=525×25÷ 86.2

p'=152.26

Answer:

2.7 moles of Fe₂O₃ is the maximum amount that can be produced. Iron is the limiting reactant.

Explanation:

The balanced reaction is:

4 Fe + 3 O₂ → 2 Fe₂O₃

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of each compound participate in the reaction:

The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.

You can use a simple rule of three as follows: if by stoichiometry 4 moles of Fe reacts with 3 moles of O₂, how much moles of Fe will be needed if 4.7 moles of O₂ react?

[tex]moles of Fe =\frac{4. moles of Fe*4.7 moles of O_{2}}{3 moles of O_{2} }[/tex]

moles of O₂= 6.27

But 6.27 moles of Fe are not available, 5.4 moles are available. Since you have less moles than you need to react with 4.7 moles of O₂, iron Fe will be the limiting reagent.

So you can use a simple rule of three as follows: if by stoichiometry 4 moles of Fe produce 2 moles of Fe₂O₃, how many moles of Fe₂O₃ will be produced if 5.4 moles of Fe react?

[tex]moles of Fe_{2}O_{3}=\frac{5.4 moles of Fe*2 moles of Fe_{2} O_{3} }{4 moles of Fe}[/tex]

moles of Fe₂O₃= 2.7 moles

Then:

2.7 moles of Fe₂O₃ is the maximum amount that can be produced. Iron is the limiting reactant.

Answer:

hardness-Hardness is the ability of a material to resist deformation

luster-the way light interacts with the surface of a crystal

color-the quality of an object or substance with respect to light reflected by the object

streak- the color of the powder produced when it is dragged across an un-weathered surface.

specif gravity-the density of that object divided by the density of water cleavage -the tendency of a mineral to break along smooth planes

fracture-any separation in a geologic formation

tenacity-refers to a mineral's toughness or resistance to breaking or being deformed.

lol sorry that took awhile