1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Gala2k [10]
3 years ago
10

Aonde a civilização egípcia se desenvolvera​

Chemistry
1 answer:
Lorico [155]3 years ago
3 0
A civilização egípcia se desenvolveu ao longo do rio Nilo em grande parte porque as enchentes anuais do rio garantiam um solo rico e confiável para o cultivo.
You might be interested in
What happens when the kinetic energy of molecules increases so much that electrons are released by the atoms, creating a swirlin
aleksandrvk [35]

Answer:

b) matter changes to plasma state.

Explanation:

5 0
2 years ago
Read 2 more answers
Trisha and her lab partner were conducting a variety of experiments to produce gases: hydrogen, oxygen, and carbon dioxide. In o
GaryK [48]

<u>Given:</u>

Volume of HCl = 150 ml

Molarity of HCl = 0.10 M

<u>To determine:</u>

The # moles of HCl

<u>Explanation:</u>

The molarity of a solution is the number of moles of a solute dissolved in a given volume

In this case:

Molarity of HCl = moles of HCl/volume of the solution

moles of HCl = Molarity * volume = 0.10 moles.L-1 * 0.150 L = 0.015 moles

Ans: A)

Moles of HCl is 0.015

7 0
3 years ago
When solid ammonium chloride dissociates at a certain temperature in a 0.500 dm3 container, ammonia and hydrogen chloride are fo
SIZIF [17.4K]
1) Reaction

<span>NH4Cl(s) ---> NH3(g) + HCl(g)


2) equilibrium equation, Kc


Kc = [NH3] * [HCl]


3) Table of equilibrium formation



step               concentrations
                       </span>
<span>                            NH4Cl(s)                     NH3(g)             HCl(g)


start                      1.000 mole                     0                    0


react                        - x


produce                                                       +x                  + x
                         ------------------                ----------              -----------

end                         1 - x                             +x                    +x
            

1 - x = 0.3 => x = 1 - 0.3 = 0.7


[NH3] = [HCl] = 0.7/0.5 liter = 1.4                (I used 0.500 dm^3 = 0.5 liter)


4) Equilibrium equation:


Kc = [NH3] [HCl] = (1.4)^2  = 1.96


Which is the number that you were looking for.


Answer: Kc = 1.96
</span>
8 0
3 years ago
Automobile air bags use the decomposition of sodium azide as their sources of gas for rapid inflation, represented in the reacti
Fynjy0 [20]

Answer:

The answer is 95 degree celcius

6 0
2 years ago
rite stepwise equations for protonation or deprotonation of this polyprotic species in water. What are the products of the first
adoni [48]

<u>Answer:</u> The products of the given chemical equation are HCO_3^-\text{ and }OH^-

<u>Explanation:</u>

Protonation equation is defined as the equation in which protons get added in the substance.

The chemical equation for the protonation of carbonate ion in the presence of water follows:

CO_3^{2-}+H_2O\rightarrow HCO_3^-+OH^-

By Stoichiometry of the reaction:

1 mole of carbonate ion reacts with 1 mole of water to produce 1 mole of hydrogen carbonate ion and 1 mole of hydroxide ion

Hence, the products of the given chemical equation are HCO_3^-\text{ and }OH^-

3 0
3 years ago
Other questions:
  • Differentiated animal cells and tissues include _____.
    14·1 answer
  • Iron (Fe) undergoes an allotropic transformation at 912°C: upon heating from a BCC (α phase) to an FCC (γ phase). Accompanying t
    15·2 answers
  • The combustion of 44.45 grams of a hydrocarbon gas mixture releases 2,649 kJ of heat. How much energy, in kWh, will the combusti
    12·1 answer
  • Which statement is true of unstable isotopes?
    9·1 answer
  • Determine whether each compound is soluble or insoluble. If the compound is soluble, list the ions present in solution. AgNO3 Pb
    8·2 answers
  • Plz help! This question is due in 10 mins!
    5·1 answer
  • For problems 2 &amp; 3, the density of the sample is 0.9977 g/mL and the molar mass of calcium carbonate is 100.0 g/mol. 2. Calc
    12·1 answer
  • If barium was to react with oxygen to form ionic compounds, how many oxygen atoms would be needed? Explain.
    11·1 answer
  • List and describe the two major types of plastics.​
    15·1 answer
  • 50 POINTS!!!!!!
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!