Can anybody do this?

Answer:

[Zn(C₂H₃O₂)₂] = 1.85M (3 sig-figs accurate to 0.01 Molar)

Explanation:

Concentration is defined as amount of solute in a specified volume of solution. That is, Concentration = mass of solute/volume of solution (solution = solute + solvent). When concentration is in terms of Molar values the essential relationship is Molarity(M) = moles solute / volume of solution in liters.

For this problem => first, convert mass of Zn(C₂H₃O₂)₂ into moles and then the volume of solution into liters. Take ratio of moles/volume of solution (L).

=> Molar Concentration = moles of Zn(C₂H₃O₂)₂ / Liters of solution

moles of Zn(C₂H₃O₂)₂ = 85.0 grams Zn(C₂H₃O₂)₂ / formula weight of Zn(C₂H₃O₂)₂  =  85.0g/183.5g·mole⁻¹ = 0.463 mole Zn(C₂H₃O₂)₂.

Volume of solution in Liters = 250ml / 1000ml/L = 0.250 liters

Molarity of  Zn(C₂H₃O₂)₂ solution = 0.463 mole Zn(C₂H₃O₂)₂  /0.250 liters of solution = 1.85 Molar in Zn(C₂H₃O₂)₂

_____________

Note: The symbiology convention for 'molar solution concentration' is to place brackets around the molecular formula. That is, [Zn(C₂H₃O₂)₂] = 1.85M

Answer:

Overpopulated prey.

Explanation:

Because if you remove the predators from the picture who's gonna eat the prey? So it would only make sense that the prey would overpopulate! Hope this helped! (^-^)

A removal of the predator populations from an ecosystem would most likely result in overpopulated prey.

An ecosystem, sometimes known as just an ecological system, primarily made up of all the species that dwell in the physical environment. These abiotic components are linked via nutrition cycles as well as energy fluxes.

Animals contribute significantly to the transport of nutrients as well as energy through the system by consuming plants and each other. They also influence the biomass concentrations of microbial and plant populations. A removal of the predator populations from an ecosystem would most likely result in overpopulated prey.

Therefore, a removal of the predator populations from an ecosystem would most likely result in overpopulated prey.

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Answer:

2 in front of every one

Explanation:

HOPE IT HELPS

Answer:

The final temperature of both substances at thermal equilibrium is 17.3°C

Explanation:

To calculate the final temperature of both substances at thermal equilibrium -:

First , we calculate the heat of A1  cube as follows -

            q= mSΔT

(where q = heat of the cube , m = mass of cube , S= specific heat of cube  {0.902j/g°C}, T = Temperature )

Putting the values given in the question ,

        [tex]q= 32.5g\times0.902\j/g[/tex]°[tex]C[/tex][tex]\times(T_f-45.8[/tex]°[tex]C)[/tex]

            [tex]29.315\times(T_f-45.8)J[/tex]

Now , calculate the heat of water -

         q=mSΔT

Putting values from the question ,

           [tex]q=105.3g\times4.18j/g[/tex]°[tex]C[/tex][tex]\times (T_f-15.4[/tex]°[tex]C)[/tex]

              =[tex]440.154\times(T_f-15.4)J[/tex]

          Now ,

Heat lost by water A1= Heat gained by water [negative sign about heat lost]

         [tex]-29.315\times(T_f-45.8)J[/tex] [tex]=440.154\times(T_f-15.4)J[/tex]

            [tex]\frac{-(T_f-45.8)J}{T_f-15.4)J} =\frac{440.154}{29.315}=15.0[/tex]

      [tex]-T_f+45.8[/tex]°[tex]C=15T_f-231.2[/tex]°[tex]C[/tex]

       [tex](45.8+231.2)[/tex]°[tex]C[/tex]=[tex]16T_f[/tex]

        [tex]16T_f=277.03[/tex]°[tex]C[/tex]

       [tex]T_f=\frac{277.03}{16}[/tex] = 17.3°C

Therefore , the final temperature of both substances at thermal equilibrium is 17.3°C

Answer:

[tex]\boxed {\boxed {\sf A. \ SiCl_4}}[/tex]

Explanation:

We are given the compound name: silicon tetrachloride.

Silicon is a metalloid and chlorine is a nonmetal, therefore we must use the rules of molecular compounds. Molecular compounds use prefixes to name the compounds. Break up the compound into 2 parts.

1. Silicon

The first element: silicon, has no prefix. Therefore, a prefix of mono (1) is implied.

2. Tetrachloride

The -ide suffix is added to the second element, so this is really chlorine. The prefix of tetra means 4.

So there is 1 silicon (Si) atom and 4 chlorine (Cl) atoms. The formula must be SiCl₄

the answer is dure light I'm not sure of this answer ,but it might be to go with .

Answer:

Chemical properties of matter describes its "potential" to undergo some chemical change or reaction by virtue of its composition. What elements, electrons, and bonding are present to give the potential for chemical change. It is quite difficult to define a chemical property without using the word "change"

Explanation:

Explanation:

The equation of the reaction is given as;

6CO2 + 6H2O → C6H12O6 + 6O2

How many molecules of CO2 are present?

6 moles

How many atoms of oxygen are present in the reactants?

(6 * 2) + (6 * 1 ) = 12 + 6 = 18

How many atoms of carbon are present in the products?

(6 * 1 ) = 6

How many total atoms are present in C6H12O6?

6 + 12 + 6 = 24 atoms

Is the equation above balanced or unbalanced?

This is a balanced equation since the number of atoms of the elements is the same in the reactant and products.

Answer:

The specific heat capacity of the unknown metal is 0.223 [tex]\frac{J}{g*C}[/tex]

Explanation:

Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.

There is a direct proportional relationship between heat and temperature. The constant of proportionality depends on the substance that constitutes the body as on its mass, and is the product of the specific heat by the mass of the body. So, the equation that allows calculating heat exchanges is:

Q = c * m * ΔT

where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.

In this case, you know:

Replacing:

418.6 J= c* 75 g* 25 C

Solving:

[tex]c=\frac{418.6 J}{75 g*25 C}[/tex]

c= 0.223 [tex]\frac{J}{g*C}[/tex]

The specific heat capacity of the unknown metal is 0.223 [tex]\frac{J}{g*C}[/tex]

Answer:

about 79% (79.04369332 to be exact)

Explanation:

Percent composition=(Molar mass of element x amount of it)/Molar mass of compound x 100

Br= 3 x 79.9/303.25 x100=79.04369332

Answer:

A compound and oxidant react to produce heat and new product is chemical reaction.

Answer:

NO is the limiting reactant.

Explanation:

4NH3 + 6NO --> 5N2 + 6H2O

Molar ration NH3 : NO = 10: 30 = 1: 3

Stoichiometric molar ration NH3:NO = 4:6 = 2:3

NO is the limiting reactant.

Answer: when you look at the meat, and it looks beautiful like a crispy donut made by Gordan Ramsay

Explanation:

Hells Kitchen is kewl

Answer:

because it is so fundamental to our world . chemistry plays a role in everyone lives.

It touches almost every aspect of our existence in some way.

Chemistry is essential for meeting our basic needs of food, cloth, etc.

Chemistry plays a important and useful role towards the development and growth of industries.

chemistry also helps you become who you want to be.

Answer:

1,3,2

Explanation:

N2 + 3H2-----> 2NH3

Answer: 11.8 grams of [tex]CaCl_2[/tex] is required.

Explanation:

To calculate the number of moles for given molarity, we use the equation:

[tex]\text{Molarity of the solution}=\frac{\text{Moles of solute}\times 1000}{\text{Volume of solution (in L)}}[/tex]     .....(1)

Molarity of [tex]AgNO_3[/tex] solution = 0.506 M

Volume of solution = 420 mL

Putting values in equation 1, we get:

[tex]0.506M=\frac{\text{Moles of} AgNO_3\times 1000}{420ml}\\\\\text{Moles of }AgNO_3=\frac{0.506mol/L\times 420}{1000}=0.212mol[/tex]

The balanced chemical reaction is:

[tex]2AgNO_3+CaCl_2\rightarrow 2AgCl+Ca(NO_3)_2[/tex]

2 mole of [tex]AgNO_3[/tex] requires = 1 mole of [tex]CaCl_2[/tex]  

0.212 moles of [tex]AgNO_3[/tex] require = [tex]\frac{1}{2}\times 0.212=0.106[/tex] moles of [tex]CaCl_2[/tex]

Mass of  [tex]CaCl_2[/tex] =[tex]moles\times {\text {Molar Mass}}=0.106mol\times 111g/mol=11.8g[/tex]

The given reaction is the type of Decomposition reaction. A decomposition reaction occurs when one reactant splits into many products.

Chemistry reaction reactions of decomposition. Decomposition reactions occur when complex chemical entities split apart into smaller components. Decomposition reactions often demand energy input.

Decomposition reactions are those that divide or break the compounds into two simpler products. Because two or more reactants are combined to create a single product in a combination reaction, they are known as the reverse of combination reactions.

It entails the severing of ties. Energy is necessary to dismantle the bonding between atoms. Decomposition advances when energy in the form of heat or electricity is provided. As the bond is broken during this reaction, energy is given to them, making them endothermic processes.

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Answer:

Socrates was a Greek philosopher, considered one of the most important, a master of Plato, who called Aristotle a disciple

Explanation:

Answer:

20.8L = Final volume of the gas

Explanation:

Based on Charles's law, the volume of a gas is directly proportional to the temperature of the gas under pressure constant. The equation is:

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

where V is volume and T absolute temperature of 1, initial state and 2, final state.

If initial volume is 22.5L, initial T = 365K and final temperature 338K:

22.5L / 365K = V₂ / 338K

Answer:

1.) B

2.) water

Explanation:

Some Rules Regarding Oxidation Numbers:

- Hydrogen has oxidation number of + 1 except in hydrides where it is -1

- Oxygen has oxidation number of -2 except in peroxides where it is -1

- Some elements have fixed oxidation numbers. E.g Halogen group elements has oxidation number of -1

- Oxidation number of a compound is the sum total of the individual elements and a neutral  compound has oxidation number of 0.

A. HI

Hydrogen has oxidation of + 1

Oxidation number of I:

1 + x = 0

x = -1

B. PBr3

Br has oxidation number of - 1

Oxidation number of Pb:

x + 3 (-1) = 0

x = + 3

C. KH

Hydrogen has oxidation of + 1

Oxidation number of K:

1 + x = 0

x = -1

D. H3PO4

Hydrogen has oxidation number of + 1

Oxygen has oxidation number of -2

Oxidation number of P:

3(1) + x + 4(-2) = 0

3 + x - 8 =0

x = 5

Answer:

65563.914234

Explanation:

8.61029 x 7.4 x 1029

63.716146 x 1029

multiply

= 65563.914234

El acero esta compuesto por Hierro y Carbono

Answer: