Can someone please help I need help?!?!

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.

Explanation:

The processes involved in removing the contaminants include physical processes such as settling and filtration, chemical processes such as disinfection and coagulation, and biological processes such as slow sand filtration

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.

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

Answer:

2 in front of every one

Explanation:

HOPE IT HELPS

Answer:

A solution of potassium chloride when mixed with silver nitrate solution forms an insoluble white substance silver chloride.

Explanation:

:)

Answer:

Sodium chloride

Explanation:

There are several salts in seawater, but the most abundant is ordinary table salt or sodium chloride (NaCl). Sodium chloride, like other salts, dissolves in water into its ions, so this is really a question about which ions are present in the greatest concentration. Sodium chloride dissociates into Na+ and Cl- ions.

Answer:

Answer:

Those individuals with advantageous traits are more likely to survive and reproduce. The survivors pass down these advantageous traits to their offspring.

Explanation:

Answer:

a

Explanation:

the traits of the organism

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:

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

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:

steel

Explanation:

Answer:

B. STEEL

Explanation:

hormone erythropoietin (EPO) is responsible for the production of red blood cells.

Answer:

4.03 g

Explanation:

The mass in grams of the hydrogen gas is 4.0 g

From the question,

We are to determine the mass in grams of the hydrogen gas.

First, we will determine the number of moles of hydrogen gas present.

Using the formula,

[tex]Number\ of\ moles =\frac{Number\ of \ molecules}{Avogadro's\ constant}[/tex]

From the given information,

Number of hydrogen molecules = 1.204 × 10²⁴ molecules

Thus,

Number of moles of hydrogen gas present = [tex]\frac{1.204 \times 10^{24} }{6.02 \times 10^{23} }[/tex]

Number of moles of hydrogen gas present = 2 moles

Now, for the mass of the hydrogen gas

Using the formula,

Mass = Number of moles × Molar mass

Molar mass of hydrogen gas = 2.016 g/mol

Then,

Mass of the hydrogen gas = 2 × 2.016

Mass of the hydrogen gas = 4.032 g

Mass of the hydrogen gas ≅ 4.0 g

Hence, the mass in grams of the hydrogen gas is 4.0 g

Learn more on Stoichiometry here: https://brainly.com/question/2861244

Answer:

65563.914234

Explanation:

8.61029 x 7.4 x 1029

63.716146 x 1029

multiply

= 65563.914234

Answer:

At the top of Group 11 above silver and gold.

Period 4

Explanation:

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:

Hydorgen will.

Because hydrogen has 1 as valency.

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:

Answer:

1.81

Explanation:

3*16=n(0.0821)(48+273)