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
g100num [7]
3 years ago
6

Choose the word that best completes this sentence. Welding in confined spaces or on stainless steel generates _____________ a ve

ry toxic chemical.
a. Carbon monoxide
b. Hexavalent chromium
c. Hydrogen sulfide
d. Solvent vapors
Chemistry
2 answers:
Aleks04 [339]3 years ago
6 0

Correct answer choice is :


B) Hexavalent chromium


Explanation:


Mixtures may be utilized as colors in dyes, paints, inks, and synthetics. It also may be utilized as an anticorrosive tool added to paints, primers, and other exterior layers. The Cr(VI) compound chromic acid is utilized to electroplate chromium onto alloy parts to give a beautiful or shielding sheet.


Drupady [299]3 years ago
5 0
<span>Welding in confined spaces or on stainless steel generates (B) Hexavalent Chromium a very toxic chemical. Hexavalent chromium are chemical compounds that has a chromium with an oxidation state of +6. It is commonly used in textile dyes and wood preservation to avoid corrosion and conversion coatings.</span>
You might be interested in
In the density of a liquid activity, the graph had an intercept. If you were to make a similar graph using metal blocks, would t
Alex17521 [72]

Answer:

NO

Explanation:

<u>It would be difficult to plot a line of best fit on the scattered graph of the activities of metal blocks as the activities would almost be the same horizontally on the graph</u> and an attempt to draw/determine an intercept will be almost impossible.  The line of best fit is usually drawn to determine the relatedness/correlation of the variables.

Drawing intercept for the activities of the liquid is easier because a line of best fit can be easily placed between the clustered liquid activities on the scattered plot.

8 0
4 years ago
A mixture of CO (g) and excess O2(g) is placed in a 1.0 L reaction vessel at 100.0C and a total pressure of 1.50 atm. The CO is
umka2103 [35]

Answer:

Partial pressure of of CO₂ in the product mixture is 0,20atm

Explanation:

The balance equation is:

2CO(g) + O₂(g) → 2CO₂(g)

Total pressure of CO(g) and O₂(g) gases before reaction at 100,0°C and 1,0L is 1,50 atm. You can say:

X₁ + Y₁  = 1,50atm <em>(1)</em>

Where X₁ is initial partial pressure CO and Y₁ is initial partial pressure of O₂

After reaction partial pressures are:

X₂ = X₁ - 2n = 0; <em>2n = X₁</em>

Y₂ = Y₁ - n

Z₂ = 2n

Where Z₂ is final partial pressure of CO₂

After reaction pressure at 100,0°C and 1,0L is 1,40 atm, that means:

1,40 atm = (Y₂ + Z₂)

1,40 atm = Y₁ - n + 2n

1,40atm = Y₁ + n

1,40 atm = Y₁ + X₁/2 <em>(2)</em>

Replacing (1) in (2)

1,40 atm = 1,50atm - X₁ + X₁/2

-0,10 atm = - X₁/2

<em>0,20 atm = X₁</em>.

As 2n = X₁; 2n =<em> Z₂ = 0,20 atm</em>

I hope it helps!

7 0
3 years ago
Write the balanced chemical equation for the following reaction. Also, classify the
tekilochka [14]

Answer:

Explanation:

Al2(SO4)3 + 3BaCl2 ====> 2AlCl3 + 3BaSO4

Sorry forgot to say that it is a double replacement. The Ba goes where there Aluminum is and the Aluminum goes where the Barium is.

The internal balance numbers come from the fact that the ions and complex ions have different valance numbers.

3 0
3 years ago
Which of these is not a postulate of the kinetic-molecular theory of gases?
marin [14]

a) Gas particles have most of their mass concentrated in the nucleus of the atom.

b) The moving particles undergo perfectly elastic collisions with the walls of the container.

c) The forces of attraction and repulsion between the particles are insignificant.

d) The average kinetic energy of the particles is directly proportional to the absolute temperature.

e) All of the above are postulates of the kinetic molecular theory.

Gas particles have most of their mass concentrated in the nucleus of the atom.

Answer: Option A.

<u>Explanation:</u>

Kinetic Molecular Theory expresses that gas particles are in consistent movement and show flawlessly versatile crashes. Motor Molecular Theory can be utilized to clarify both Charles' and Boyle's Laws. The normal active vitality of an assortment of gas particles is straightforwardly corresponding to total temperature as it were.

The kinetic theory of gases is a significantly critical, however straightforward model of the thermodynamic conduct of gases with which numerous important ideas of thermodynamics were built up.

6 0
4 years ago
175 ml of a 1.6 m solution of kcl is diluted to a new volume of 1.0 l. what is the new concentration of the solution? (3 points)
djyliett [7]

175 ml of a 1.6 m solution of KCl is diluted to a new volume of 1.0 L. The new concentration of the solution is 0.28 m KCl.

Hence, Option (B) is correct answer.

<h3>What is Concentration ?</h3>

Concentration is defined as the measure of how much substance there is mixed with another substance.

<h3>How to find the concentration ?</h3>

To find the concentration use the dilution formula

C₁V₁ = C₂V₂

where,

C₁ = Concentration of starting solution

C₂ = Concentration of final solution

V₁ = Volume of the starting solution

V₂ = Volume of the final solution

Now put the values in above formula we get

C₁V₁ = C₂V₂

1.6 × 0.175 = C₂ × 1.0

0.28 = C₂ × 1.0

C₂ = 0.28

Thus from the above conclusion we can say that 175 ml of a 1.6 m solution of KCl is diluted to a new volume of 1.0 L. The new concentration of the solution is 0.28 m KCl.

Hence, Option (B) is correct answer.

Learn more about the Concentration here: brainly.com/question/17206790

#SPJ1

3 0
2 years ago
Other questions:
  • What energy transfer is occurring when a battery-powered toy rolls across the floor? Stored mechanical energy is converted to th
    6·2 answers
  • Which is part of meiosis but not mitosis
    11·1 answer
  • There are two parts of photosynthesis--the light reactions and the dark reactions. What is the end product of the dark reactions
    15·2 answers
  • What is produced during the replacement reaction if Ba(NO3)2 and Na2SO4?
    9·1 answer
  • 8. Which of the following would not increase the rate of most reactions?
    13·2 answers
  • Calculate the change in entropy that occurs when 36.04 g of ice at –12.5°C is placed in 45.04 g of water at 100.0°C in a perfect
    8·1 answer
  • Urea is an organic compound widely used as a fertilizer. Its solubility in water allows it to be made into aqueous fertilizer so
    10·1 answer
  • A semipermeable membrane is placed between the following solutions. Which solution will decrease in volume? Solution A: 1.31% (m
    12·2 answers
  • Forested land in the area was cleared to make several building lots. Trees were left on the outskirts of each lot. This is a pic
    15·1 answer
  • How is a waves amplitude related to the amount of energy the wave carries?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!