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
Leno4ka [110]
3 years ago
13

Convert mass to moles for both reactants. (Round to 2 significant figures.)

Chemistry
2 answers:
kifflom [539]3 years ago
8 0

Answer:

1. 0.19

2. 0.19

Explanation:

just did on ed 2020

shepuryov [24]3 years ago
6 0
Mass = mr x moles
Mr of CuCl2 = ( 63.5) + ( 35.5 x 2) = 134.5
2.5 = 134.5 x moles
2.5 / 134.5 = moles
Moles = 0.019 (2DP)

0.25g of Al
Mr of Al = 27
0.25 = 27 x moles
0.25/ 27 = 0.0093 moles (2sf)

Hope this helps :)
You might be interested in
1‑propanol ( n ‑propanol) and 2‑propanol (isopropanol) form ideal solutions in all proportions. Calculate the partial pressure a
Alex777 [14]

Answer:

y_{prop} = 0.134; y_{iso} = 0.866

The partial pressure of isopropanol = 34.04 Torr; The partial pressure of propanol = 5.26 Torr

Explanation:

For each of the solutions:

mole fraction of isopropanol  (x_{iso}) = 1 - mole fraction of propanol (x_{prop}).

Given: mole fraction of propanol = 0.247. Thus, the mole fraction of isopropanol = 1 - 0.247 = 0.753.

Furthermole, the partial pressure of isopropanol = x_{iso}*vapor pressure of isopropanol = 0.753*45.2 Torr = 34.04 Torr

The partial pressure of propanol = x_{prop}*vapor pressure of propanol = 0.247*20.9 Torr = 5.16 Torr

Similarly,

In the vapor phase,

The mole fraction of propanol (y_{prop}) = \frac{P_{prop} }{P_{prop}+P_{iso}}

Where, P_{prop} is the partial pressure of propanol and P_{iso} is the partial pressure of isopropanol.

Therefore,

y_{prop} = 5.26/(34.04+5.16) = 0.134

y_{iso} = 1 - 0.134 = 0.866

5 0
3 years ago
What is a trade-off? <br><br><br><br><br> Don't mind the highlighted yellow circle
kirill [66]

Answer:

a new scientific discovery that benefits the environment

5 0
2 years ago
Electron A falls from energy level X to energy level Y and releases blue light. Electron B falls from energy level Y to energy l
MrMuchimi

Answer: Transition from X to Y will have greater energy difference.

Explanation: For studying the energy difference, we require Planck's equation.

                                E=\frac{hc}{\lambda}

where, h = Planck's Constant

c = Speed of light

E = Energy

\lambda = Wavelength of particle

From the equation, it is visible that the energy and wavelength follow inverse relation which means that with low wavelength value, energy will be the highest and vice-versa.

As electron A falls from X-energy level to Y-energy level, it releases blue light which has low wavelength value (around 470 nm) which means that it has high energy.

Similarly, Electron B releases red light when it falls from Y-energy level to Z-energy level, which has high wavelength value (around 700 nm), giving it a low energy value.

Energy Difference between X-energy level and Y-energy level will be more.


5 0
3 years ago
Is a book sitting high upon a shelf a balanced force or an unbalanced force
Art [367]
Balanced force I think
7 0
3 years ago
Read 2 more answers
She slams her fist onto the calculator with 8000 j of KE. If she moved her arm at 3 m/s, what is the mass of her fist?
Makovka662 [10]

Answer:

1777.7

Explanation:

kE =0.5mv^2

8000=9/2 m

1777.7

3 0
3 years ago
Other questions:
  • Write a balanced chemical equation for each of the following.
    5·2 answers
  • What is the Factor Label Method?
    14·1 answer
  • Which substance reacts with an acid to form hydrogen gas?
    13·2 answers
  • The main compound used to release energy for metabolism is ________.
    7·1 answer
  • 14. In groups, students create dioramas to depict different ecosystems and their physical characteristics. One of the dioramas i
    9·1 answer
  • The chemical reaction of photosynthesis naturally occurs in the presence of sunlight because the light.....
    7·1 answer
  • Of the following, only ________ has sp2 hybridization of the central atom. Of the following, only ________ has sp2 hybridization
    8·1 answer
  • Tertiary alcohols with two identical alkyl groups attached to the alcohol carbon can be made either from an ester and two moles
    12·1 answer
  • Explain the alignment of Earth, Sun and Moon during a lunar and solar eclipse.
    15·1 answer
  • a gas has a volume of 2.00 at 323k and 3.00 ATM What would be the new volume if the temperature is changed to 273 K in the press
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!