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
Digiron [165]
3 years ago
6

Help please!!!!!!!!! :(

Chemistry
2 answers:
vladimir2022 [97]3 years ago
8 0

Answer:1 and 4

Explanation:

take notes

harkovskaia [24]3 years ago
8 0
The answer is response number A
You might be interested in
First, get about 20 mL of the quinine stock solution in a clean beaker to prepare 250 mL of about 2 ppm quinine in 0.05 M H2SO4.
iris [78.8K]

Answer:

Volume of acid, Va=250mL; Volume of quinine,Vb=20mL; Molarity of acid, Ma=0.05M.

Molar mass of acid= H2+S+O4= 2+32+(16X4)= 2+32+64=98g

Concentration of acid, Ca= Molar mass of acid/ Ma =98/0.05=1960g/mol

Explanation: To calculate concentration of quinine, Cb is as follow

Va*Ca=Vb*Cb

∴ Cb=Va*Ca/Vb =250*1960/20 =24500g/mol

5 0
3 years ago
A beverage manufacturer wants to increase The solunility of carbon dioxide in its carbonated drinks as beverages produced which
DedPeter [7]

Answer: C

Explanation:

8 0
3 years ago
How did Mendeleev arrange the known elements?
Agata [3.3K]
In order of relative atomic mass.
4 0
3 years ago
Read 2 more answers
Why is coal not classified as a mineral?
Fittoniya [83]

A mineral is a naturally occurring chemical compound, usually of crystalline form and abiogenic in origin. A mineral has one specific chemical composition. Coal is not a mineral because it is organic while a mineral is inorganic that have repeating crystalline structure.

4 0
3 years ago
How much heat do you need to raise the temperature of 150 g of ice from -30°C to -15°c?
OLga [1]
To solve this question, you must use the formula: q=mc(change in temperature), where q is heat, m is mass, C is specific heat and temperature change is temperature change. The specific heat for ice is 2.1kJ/Kg x K (given). The change in temperature is 15 degrees Celsius (which you should change to kelvins so you can cancel out units), or 273 + 15 = 288K. The mass is 150 grams, which is 0.15 kg. Now, we can solve for q, heat. We will do this by substituting variables into the formula. After simplifying and cancelling out units, the answer we get is: 90.72kJ.
4 0
3 years ago
Other questions:
  • What is the best description of osmosis?
    11·2 answers
  • The chemical formula tells the types of atoms and how many of each are contained in a compound. Please select the best answer fr
    14·1 answer
  • What is the mass,in grams, of 2.75 L of CO2 gas
    13·1 answer
  • The orbits of asteroids are found primarily between
    11·1 answer
  • 3. What is the substance ozone?
    5·1 answer
  • What are the molality and mole fraction of solute in a 22.3 percent by mass aqueous solution of formic acid (HCOOH)?
    8·2 answers
  • Which element is placed in the same period as ruthenium but has a higher atomic number than it?
    5·1 answer
  • The graph above represents an object moving with a __________________. A) constant velocity B) constant acceleration C) constant
    6·1 answer
  • How does increasing temperature affects reaction rate?
    15·1 answer
  • S + 6 HNO3 → H₂SO4 + 6 NO₂ + 2 H₂O
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!