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
uranmaximum [27]
3 years ago
6

Zinc metal (Zn) reacts with hydrochloric acid (HCI) to produce hydrogen gas (H) and zinc chloride (ZnCl2). A scientist has powde

red zinc and a chunk of zinc of equal mass. Available in the lab are dilute HCl and concentrated HCl. Which combination of zinc and acid would react most quickly? Explain why the combination you chose would make the reaction occur most quickly.​
Chemistry
1 answer:
Marta_Voda [28]3 years ago
4 0

Answer:

hello I am interested in the position and would like to know if you have any questions please feel free to contact me at any time if

You might be interested in
Determine the hydroxide ion concentration in<br> a solution that is 0.028 M NaOH.
Savatey [412]
Answer = 0.0007 moldm
7 0
3 years ago
At 25∘C, the decomposition of dinitrogen pentoxide, N2O5(g), into NO2(g) and O2(g) follows first-order kinetics with k=3.4×10−5
Annette [7]

Answer:

4600s

Explanation:

2N_{2}O_{5}(g) - - -> 4NO_{2}(g) +O_{2}

For a first order reaction the rate of reaction just depends on the concentration of one specie [B] and it’s expressed as:

-\frac{d[B]}{dt}=k[B] - - -  -\frac{d[B]}{[B]}=k*dt

If we have an ideal gas in an isothermal (T=constant) and isocoric (v=constant) process.

PV=nRT we can say that P = n so we can express the reaction order as a function of the Partial pressure of one component.  

-\frac{d[P(B)]}{P(B)}=k*dt  

-\frac{d[P(N_{2}O_{5})]}{P(N_{2}O_{5})}=k*dt

Integrating we get:

\int\limits^p \,-\frac{d[P(N_{2}O_{5})]}{P(N_{2}O_{5})}=\int\limits^ t k*dt

-(ln[P(N_{2}O_{5})]-ln[P(N_{2}O_{5})_{o})])=k(t_{2}-t_{1})

Clearing for t2:

\frac{-(ln[P(N_{2}O_{5})]-ln[P(N_{2}O_{5})_{o})])}{k}+t_{1}=t_{2}

ln[P(N_{2}O_{5})]=ln(650)=6.4769

ln[P(N_{2}O_{5})_{o}]=ln(760)=6.6333

t_{2}=\frac{-(6.4769-6.6333)}{3.4*10^{-5}}+0= 4598.414s

4 0
3 years ago
How could maglev trains help improve people's lives? Write three paragraphs. First summarize the author's criticism of conventio
skelet666 [1.2K]
Maglev trains were created to connect Shanghai Pudong International Airport to Central Pudong. Transrapid, another name for the Maglev train is said to be the fastest train. It can run up to 270/mph in just eight minutes.
Compared to other transportation systems, Transrapid is faster and more cost effective. It has less maintaining coverage and zero sounds compared to the ordinary ones. 
This kind of train is one of the most effective means of transportation. It lessens traffic and pollution caused by car emission. It also saves more time for people who are always on the go.
4 0
3 years ago
Calculate the mass of 29.8 mL of aluminum, which has a density of 2.00 g/mL.
MaRussiya [10]

Answer:

The answer is

<h2>59.6 g </h2>

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

<h3>mass = Density × volume</h3>

From the question

Density of aluminum = 2.00 g/mL

volume = 29.8 mL

The mass is

mass = 2 × 29.8

We have the final answer as

<h3>59.6 g</h3>

Hope this helps you

5 0
2 years ago
What is the mass of bromine gas if it has a pressure of 720 mmHg, volume of 25mL and a temperature of 18.3 degrees Celsius
Annette [7]

Answer:

             Mass = 0.158 g

Explanation:

Formula used,

P V = n R T

Or,

n = P V / R T

Putting values,

n = 0.948 atm . 0.025 L / 0.0821 L.atm.K⁻¹.mol⁻¹ . 291.45

n = 0.00099 mol

Note: we have changed pressure from mmHg to atm, volume from mL to L and temperature from C to K)

Also,

Mass = n . Molecular Mass

Mass = 0.00099 mol × 159.808 g/mol

Mass = 0.158 g

7 0
2 years ago
Other questions:
  • When a system performs work on the surroundings, the work is reported with a negative sign. True of False
    6·1 answer
  • Which pair of substances would most likely result in the production of a solid when reacting with a base? litmus and phenolphtha
    13·2 answers
  • Acids react with bases so that the properties of both are lost to form water and a salt. This is called __
    8·1 answer
  • Search blue bottle experiment, read over the reaction, and explain why the colorless solution turns blue
    7·1 answer
  • while the substance is a liquid at what temperature do the molecules of the substance have the greatest average kinetic energy ​
    8·1 answer
  • What is the overall net charge of an ionic compound?<br> O 1- <br> O 1+<br> O 2-<br> O 0​
    10·1 answer
  • A forest ecosystem starts with both Sonoran toads and Wood frogs. What would you expect to happen if the ecosystem becomes more
    15·1 answer
  • When 29 grams of sodium metal (Na) react with 49 grams of chlorine gas (C1), solid
    11·1 answer
  • How many moles of solute are present in a sodium chloride solution with a total
    10·1 answer
  • How could you use
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!