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
xxMikexx [17]
3 years ago
14

Can someone help me pls I don’t have time Time is almost ran out pls help

Chemistry
1 answer:
pochemuha3 years ago
3 0

Answer:

Can you get a closer picture, then I can help! It looks like it says something on rain, hail and something else. I cant see it though! :)

Explanation:

You might be interested in
Which is an example of parasitism?
Doss [256]

Answer: A, C, D

Explanation:

6 0
3 years ago
What is the partial pressure of argon, par, in the flask? express your answer to three significant figures and include the appro
monitta
Given which are missing in your question:
the flask is filled with 1.45 g of argon at 25 C° 
So according to this formula (Partial pressure):
PV= nRT
first, we need n, and we can get by substitution by:
n =  1.45/mass weight of argon
   = 1.45 / 39.948 = 0.0363 mol of Ar
we have R constant = 0.0821
and T in kelvin = 25 + 273 = 298
and V = 1 L
∴ P * 1 = 0.0363* 0.0821 * 298 = 0.888 atm

3 0
3 years ago
Why do plants need sunlight for photosynthesis?
igomit [66]

Explanation: Plants using photosynthesis will take in carbon dioxide from the air, bring up water from the roots, and use sunlight as the energetic source to create sugar from water and carbon dioxide. Plants contain a molecule called chlorophyll, and the chlorophyll is what absorbs the sunlight

7 0
3 years ago
Read 2 more answers
The half-life of C-14 is 5470 years. If a particular archaeological sample has one-quarter of its original radioactivity remaini
-Dominant- [34]
10940? Sorry if it isn’t correct
3 0
3 years ago
Read 2 more answers
What is the pH of a 3.40 mM of acetic acid, 500 mL in which 50 mL of 1.00 M NaOAc has been added? Ka HOAc is 1.8 x 10-5? What pe
Deffense [45]

Answer:

a) pH = 4.213

b) % dis = 2 %

Explanation:

Ch3COONa → CH3COO- + Na+

CH3COOH ↔ CH3COO- + H3O+

∴ Ka = 1.8 E-5 = ([ CH3COO- ] * [ H3O+ ]) / [ CH3COOH ]

mass balance:

⇒ <em>C</em> CH3COOH + <em>C</em> CH3COONa = [ CH3COOH ] + [ CH3COO- ]

<em>∴ C </em>CH3COOH = 3.40 mM = 3.4 mmol/mL * ( mol/1000mmol)*(1000mL/L)

∴ <em>C</em> CH3COONa = 1.00 M = 1.00 mol/L = 1.00 mmol/mL

⇒ [ CH3COOH ] = 4.4 - [ CH3COO- ]

charge balance:

⇒ [ H3O+ ] + [ Na+ ] = [ CH3COO- ] + [ OH- ]....is negligible [ OH-], comes from water

⇒ [ CH3COO- ] = [ H3O+ ] + 1.00

⇒ Ka = (( [ H3O+ ] + 1 )* [ H3O+ ]) / ( 3.4 - [ H3O+])) = 1.8 E-5

⇒ [ H3O+ ]² + [ H3O+ ] = 6.12 E-5 - 1.8 E-5 [ H3O+ ]

⇒ [ H3O+ ]² + [ H3O+ ] - 6.12 E-5 = 0

⇒  [ H3O+ ] = 6.12 E-5 M

⇒ pH = - Log [ H3O+ ] = 4.213

b) (% dis)* mol acid = <em>C</em> CH3COOH = 3.4

∴ mol CH3COOH = 500*3.4 = 1700 mmol = 1.7 mol

⇒ % dis = 3.4 / 1.7 = 2 %

7 0
3 years ago
Other questions:
  • Giovanni created this chart to study for an exam.
    10·2 answers
  • Explain how you determine the number of valence electrons that should be used in the dot structure for silicon dioxide and state
    14·1 answer
  • What forces create the bent triatomic shape of a water molecule
    6·1 answer
  • How much hear must be obsorberd by 375.0 grams of water to raise its temperature from 10.0c to 35.0c? The specific heat capacity
    14·1 answer
  • What are three elements that have similar chemical properties to oxygen
    8·1 answer
  • Which sentence describes one characteristic of nonmetals? Nonmetals are often brittle solids. Nonmetals are often malleable. Non
    14·2 answers
  • Which is a cationic detergent having four organic groups attached to a nitrogen atom and used to sanitize utensils? Select one:
    9·1 answer
  • Calcium oxide (CaO), an important ingredient in cement, is produced by decomposing calcium carbonate (CaCO3) at high temperature
    9·1 answer
  • How many moles are present in 450 grams of sodium phosphide, Na3PNa3P?
    8·1 answer
  • A student heated a blue copper sulfate crystal in a test tube. After a few minutes, she observed that the crystal turned white a
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!