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
omeli [17]
3 years ago
11

Give the formula of a compound in unpolluted air

Chemistry
1 answer:
77julia77 [94]3 years ago
6 0
Carbon dioxide and oxigen
You might be interested in
Two students are given different samples of a substance and are instructed to determine the properties of the substance.Which st
musickatia [10]

Answer:

The boiling point of the substances

Explanation:

Because Boiling point is an intensive property.

5 0
3 years ago
A hot lump of 39.9 g of iron at an initial temperature of 78.1 °C is placed in 50.0 mL H 2 O initially at 25.0 °C and allowed to
Drupady [299]

Answer : The final temperature of the mixture is 29.6^oC

Explanation :

In this problem we assumed that heat given by the hot body is equal to the heat taken by the cold body.

q_1=-q_2

m_1\times c_1\times (T_f-T_1)=-m_2\times c_2\times (T_f-T_2)

where,

c_1 = specific heat of iron = 0.499J/g^oC

c_2 = specific heat of water = 4.18J/g^oC

m_1 = mass of iron = 39.9 g

m_2 = mass of water  = Density\times Volume=1g/mL\times 50.0mL=50.0g

T_f = final temperature of mixture = ?

T_1 = initial temperature of iron = 78.1^oC

T_2 = initial temperature of water = 25.0^oC

Now put all the given values in the above formula, we get

(39.9g)\times (0.499J/g^oC)\times (T_f-78.1)^oC=-(50.0g)\times 4.18J/g^oC\times (T_f-25.0)^oC

T_f=29.6^oC

Therefore, the final temperature of the mixture is 29.6^oC

8 0
3 years ago
rusting of steel can be prevented by coating the steel with a layer of zinc. Explain, in terms of electron transfer, why steal d
Luba_88 [7]

Answer:

Wouldn't rust because zinc will lose electrons more readily than iron and will therefore oxidize first.

Explanation:

This process whereby rusting of steel is prevented by coating the steel with a layer of zinc is known as galvanization.

Now, in this process, the steel object will be coated in a thin layer of zinc. This coating will prevent oxygen and water from reaching the underneath metal since the zinc will also act as a sacrificial metal.

Now, Zinc is used because it has a lower reduction potential than iron and thus it will get easily more oxidized than iron. Which means the zinc will lose electrons more readily than iron.

Also, since zinc has a lower reduction potential, it is therefore the more active metal. Thus, even if the zinc coating is scratched and the steel is exposed to moist air, the zinc will still get to oxidize before the iron.

7 0
3 years ago
crash course video about periodic table - The Periodic Table: Crash Course Chemistry #4 - write a reflection about this video
Stolb23 [73]

Answer:

I liked the video, it gave us lots of information about___. __ means/ is about.

Explanation:

7 0
3 years ago
The half-cell is a chamber in the voltaic cell where one half-cell is the site of the oxidation reaction and the other half-cell
marysya [2.9K]

Answer:

\boxed{\rm \text{Fe(s) $\rightleftharpoons$ Fe$^{2+}$(aq) + 2e$^{-}$}}

Explanation:

The half-cell reduction potentials are

Ag⁺(aq) +   e⁻ ⇌ Ag(s)     E° =  0.7996 V

Fe²⁺(aq) + 2e⁻ ⇌ Fe(s)     E° = -0.447    V

To create a spontaneous voltaic cell, we reverse the half-reaction with the more negative half-cell potential.

The anode is the electrode at which oxidation occurs.

The equation for the oxidation half-reaction is

\boxed{\rm \textbf{Fe(s) $\rightleftharpoons$ Fe$^{2+}$(aq) + 2e$^{-}$}}

4 0
3 years ago
Other questions:
  • Use dimensional analysis to find the number of cm/min in 5.8 m/hr. Show your work on the white board. Be sure to calculate the a
    12·1 answer
  • What mineral mostly form through chemical precipitation?
    8·1 answer
  • Name the following straight-chain Alkanes (picture)
    9·1 answer
  • Describe the buffer capacity of the acetic acid buffer solution in relation to the addition of both concentrated and dilute acid
    11·1 answer
  • According to the collision theory for chemical reactions why do most reactions rates increase g
    15·1 answer
  • 4. A 1.802 gram sample of unknown compound contains 0.721 grams of carbon, 0.121 grams of hydrogen and 0.960 grams of oxygen. Th
    14·1 answer
  • If a number is lass than 1 is the exponent positive or negative?
    12·2 answers
  • Give the following number of protons, neutrons, and electrons in the following isotope:
    14·1 answer
  • How do sea breezes and land breezes affect local weather
    12·1 answer
  • Nivel de energia maximo de 20Ca
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!