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
Alex787 [66]
3 years ago
12

An element that is an invisible gas is a gold b copper c iron d oxygen

Chemistry
2 answers:
uysha [10]3 years ago
7 0
The answer is D. Oxygen.
AleksandrR [38]3 years ago
6 0
The answer to your question is oxygen
You might be interested in
Which of the clouds shown would indicate a possible future rain storm?
inn [45]

wheres the clouds?? i need a picture.

7 0
3 years ago
Hydrogen gas is produced when zinc reacts with hydrochloric acid. If the actual yield of this reaction is 85%?
solong [7]

Answer:

d. 380g

Explanation:

The reaction of production of hydrogen from zinc and HCl is:

Zn + 2HCl → ZnCl₂ + H₂(g)

At STP (1atm of pressure and 273.15K), 112L are:

n = PV /RT

n = 1atm×112L / 0.082atmL/molK×273.15K

<em>n = 5.00 moles </em>

That means you need to produce 5.00 moles of hydrogen. Based on the reaction, 1 mole of Zn produce 1 mole of H₂(g), as yield of reaction is 85%:

5.00 moles H₂(g) ≡ 5.00 moles of Zn / 85% = <em>5.88 moles of Zn you need</em>

As molar mass of Zn is 65.38 g/mol:

5.88 moles Zn × (65.38g /mol) = 384 g of Zn ≡ <em>d. 380g</em>

<em></em>

I hope it helps!

3 0
3 years ago
3. (10 Points) You buy a helium balloon of 14 Liters for your friend's birthday and
vesna_86 [32]

Answer: picture shows work for # 1,2,4,5,7

Explanation:

number 3: as the pressure in the volume decreases, the volume increases causing it to expand and eventually blow.

number 6: because the temperature and the amount of gas don’t change, these terms don’t appear in the equation. What Boyle’s law means is that the volume of a mass of gas is inversely proportional to its pressure. This linear relationship between pressure and volume means doubling the volume of a given mass of gas decreases its pressure by half.

hope this helps :))

7 0
3 years ago
t 745 K, the reaction below has an equilibrium constant (Kc) of 5.00 × 102. H2 (g) + I2 (g) ⇌ 2 HI (g) If a mixture of 0.10 mol
spayn [35]

Answer : The concentration of HI (g) at equilibrium is, 0.643 M

Explanation :

The given chemical reaction is:

                        H_2(g)+I_2(g)\rightarrow 2HI(g)

Initial conc.    0.10        0.10      0.50

At eqm.        (0.10-x)  (0.10-x)   (0.50+2x)

As we are given:

K_c=5.00\times 10^2

The expression for equilibrium constant is:

K_c=\frac{[HI]^2}{[H_2][I_2]}

Now put all the given values in this expression, we get:

5.00\times 10^2=\frac{(0.50+2x)^2}{(0.10-x)\times (0.10-x)}

x = 0.0713  and x = 0.134

We are neglecting value of x = 0.134 because the equilibrium concentration can not be more than initial concentration.

Thus, we are taking value of x = 0.0713

The concentration of HI (g) at equilibrium = (0.50+2x) = [0.50+2(0.0713)] = 0.643 M

Thus, the concentration of HI (g) at equilibrium is, 0.643 M

8 0
4 years ago
Conservation of Mass - Combustion
Rashid [163]

Answer:

i think its b

Explanation:

3 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the statements is not true about friction
    8·1 answer
  • What is the difference between melting and burning a substance? One mass conserved in another process?
    9·1 answer
  • How many moles of c6h12o6 are consumed if 6 moles of o2 are consumed
    5·1 answer
  • If two gases are present in a container, the total pressure in the container is equal to
    5·2 answers
  • 8. Estimate the maximum volume percent of Methanol vapor that can exist at standard conditions. Vapor pressure = 88.5 mm Hg in a
    10·1 answer
  • Given that the speed of light is 2.998 x 108 m/s, what is the frequency of a wave that has a wavelength of 3.55 x 10-8 meters?
    13·1 answer
  • Which of the following statements is the most accurate? A. Energy transfers are never 100% efficient. B. Energy transfer is comp
    14·2 answers
  • Why is it important for<br> your body to excrete<br> waste materials?
    7·1 answer
  • Which scientist is known for developing the planetary model of the atom
    15·1 answer
  • Which of the following organisms is reproduced by regeneration?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!