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
Vikki [24]
3 years ago
9

PLS ANSWER MY QUESTIONS

Chemistry
2 answers:
valentina_108 [34]3 years ago
6 0
What are your questions?
gregori [183]3 years ago
6 0
Where is your question?
You might be interested in
How many grams of sodium chloride are required to make a 1.0 L solution with a concentration of 3.5 M? 205 grams 0.205 grams 3.5
Firlakuza [10]
<span>A 1 molar solution is the molecular weight in grams in 1 litre of water, so a 3.5 molar solution would be 58.44g multiplied by 3.5, which is 204.54g in 1L.</span>
3 0
3 years ago
Read 2 more answers
A 100 W light bulb is placed in a cylinder equipped with a moveable piston. The light bulb is turned on for 2.0×10−2 hour, and t
drek231 [11]

Answer:

(a) ΔU = 7.2x10²

(b) W = -5.1x10²

(c) q = 5.2x10²

Explanation:

From the definition of power (p), we have:

p = \frac {\Delta W}{\Delta t} = \frac {\Delta U}{\Delta t} (1)

<em>where, p: is power (J/s = W (watt)) W: is work = ΔU (J) and t: is time (s) </em>  

(a) We can calculate the energy (ΔU) using equation (1):

\Delta U = p \cdot \Delta t = 100 \frac{J}{s} \cdot 2.0\cdot 10^{-2} h \cdot \frac{3600s}{1h} = 7.2 \cdot 10^{2} J  

(b) The work is related to pressure and volume by:

\Delta W = -p \Delta V

<em>where p: pressure and ΔV: change in volume = V final - V initial      </em>

\Delta W = - p \cdot (V_{fin} - V_{ini}) = - 1.0 atm (5.88L - 0.85L) = - 5.03 L \cdot atm \cdot \frac{101.33J}{1 L\cdot atm} = -5.1 \cdot 10^{2} J

(c) By the definition of Energy, we can calculate q:

\Delta U = \Delta W + \Delta q

<em>where Δq: is the heat transfer </em>

\Delta q = \Delta U - \Delta W = 7.2 J - (-5.1 \cdot 10^{2} J) = 5.2 \cdot 10^{2} J    

I hope it helps you!  

6 0
4 years ago
Which statement correctly describes the differences between positive and negative acceleration?
aliya0001 [1]

Answer:

POSITIVE DESCRIBES AN INCREASE IN SPEED AND NEGATIVE DESCRIBES A DECREASE IN SPEED.

Explanation:

7 0
3 years ago
The reaction with hydrogen with oxygen produces water: 2 H2 + O2 ---&gt; 2H20. How many moles of O2 are required to react with 2
il63 [147K]

o2 is made and hydrogen help make it

4 0
3 years ago
Iodine-131 has a half-life of 8 days. If you have 8 g of I-131 and 16 days pass, how much I-131 do you have left?
alexandr1967 [171]

Answer:

2g

Explanation:

2 half-lives will pass. Therefore the amount will be quartered into 2g.

3 0
3 years ago
Other questions:
  • A sodium atom has an electron configuration of 1s22s22p63s1.if the sodium atom becomes ionized, its new electron configuration w
    15·1 answer
  • Assume that a nickel weighs exactly 5.038650 g for the sets of weights listed below obtained by a single weighing on the balance
    5·1 answer
  • What is the total pressure of gas in a propane tank if propane has a partial pressure of 33.1 atm, nitrogen’s is 1.11 atm, and o
    15·1 answer
  • If a reaction has an equilibrium constant just greater than 1 what type of reaction is it?
    10·1 answer
  • Which is the best definition of an ecosystem?
    7·2 answers
  • 9. During an experiment the students prepared three mixtures A)Starch in water B) Sodium chloride solution C) Tincture of Iodine
    12·1 answer
  • Why do atoms emit light energy according to the bohr model?
    10·1 answer
  • A field of many different species of wildflowers would be considered a(n) _____________.
    12·2 answers
  • 6) What is the electron configuration of an atom in its ground state with a
    15·1 answer
  • What are 3 types of insects that belong to Phylum ?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!