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
gogolik [260]
3 years ago
15

A 2.5% (by mass) solution concentration signifies that there is of solute in every 100 g of solution. 2. therefore, when 2.5% is

expressed as a ratio of solute mass over solution mass, that mass ratio would be . 3. a solution mass of 1 kg is times greater than 100 g, thus one kilogram (1 kg) of a 2.5% ki solution would contain of ki.
Chemistry
1 answer:
Stels [109]3 years ago
6 0
Answer #1. A 2.5% (by mass) solution concentration signifies that there is 2.5 grams of solute in every 100 g of solution. 
To calculate 2.5% by mass solution, we divide the mass of the solute by the mass of the solution and then multiply by 100.

Answer #2. therefore, when 2.5% is expressed as a ratio of solute mass over solution mass, that mass ratio would be 2.5/100 or 2.5 grams of solute/100 grams of solution. 
This means that weighing out 2.5 grams of solute and then adding 97.5 grams of solvent would make a total of 100 gram solution:
     mass of solute / mass of solution = 2.5g solute / (2.5g solute + 97.5g solvent)
                                                          = 2.5g solute / 100g solution

Answer#3. a solution mass of 1 kg is 10 times greater than 100 g, thus 1kg of a 2.5% ki solution would contain 25 grams of ki.
Since 1000 grams is 1 kg, we multiply 10 to each mass so that 100 grams becomes 
1000grams:
     mass of solute / mass of solution = 2.5g*10 / [(2.5g*10) + (97.5g*10)]
                                                          = 25g solute/(25g solute + 975g solvent)
                                                          = 25g solute/1000g solution
                                                          = 25g solute/1kg solution
You might be interested in
Identify the major attractive force in HF molecules.A) London Dispersion Forces (LDFs)
Llana [10]

Answer:

C) hydrogen bonding

Explanation:

All atoms and molecules have London Dispersion Forces between them, but they are usually overshadowed but the much stronger forces. In this scenario the major attractive force in HF molecules are hydrogen bonds. Hydrogen bonds are electrostatic forces of attraction found when Hydrogen is bonded to a more electronegative atom such as Oxygen, Chlorine and Fluorine.

6 0
3 years ago
Baking soda has a pH of 8. Its a(n) _________ substance
Stolb23 [73]

Answer:

it's an acid

Explanation:

because itis soda

4 0
3 years ago
Using the equations and enthalpy values provided, which mathematical expression can be used to determine the unknown enthalpy ch
vlabodo [156]
In order to solve this, we need to make use of Hess' Law.

We are already given the equations and their corresponding deltaH. Using Hess' Law, we can generate this equation:
104 kJ = x - (-1182 kJ) - (-1144 kJ)

Among the choices, the answer is
<span>B.104 = x - [(-1182) + (-1144)] 
</span>
3 0
3 years ago
Read 2 more answers
Anthony's homework assignment is to demonstrate that an orange has already undergone a chemical change. Which of the following
wolverine [178]
B. Rotten orange is the correct answer. Hope this helps!
8 0
3 years ago
Read 2 more answers
What forces hold network solids together?
ZanzabumX [31]

Answer:

Covalent solids, also called network solids, are solids that are held together by covalent bonds. As such, they need localized electrons (shared between the atoms) and therefore the atoms are arranged in fixed geometries. Distortion far from this geometry can only occur through a breaking of covalent sigma bonds.

8 0
3 years ago
Other questions:
  • Lists how many valence electrons are shared, gained, or lost by each atom of the 6 compounds?      
    15·1 answer
  • Helium has a density of 1.79 x 10-4 g/mL at standard temperature and pressure. A balloon has a volume of 6.3 liters. Calculate t
    5·2 answers
  • Methanol, CH3OH, has been considered as a possible fuel. Consider its oxidation: 2 CH3OH(l) + 3 O2(g) → 2 CO2(g) + 4 H2O(g) ΔG =
    9·1 answer
  • What is the pressure of 0.540 mol of an ideal gas at 35.5 L and 223 K? Use mc031-1.jpg and mc031-2.jpg.
    12·2 answers
  • On the addition of HI
    5·1 answer
  • How do you figure out the electron configuration of an element?
    13·1 answer
  • BaCl2(aq) + Na2SO4(aq) ⇄ 2NaCl(aq) + BaSO4(s)
    13·1 answer
  • Which resource is considered the LEAST renewable resource?
    13·1 answer
  • what volume of carbon 4 oxide measured at STP will produce when 21 gram of sodium hydrogen carbonate for is completely decompose
    12·1 answer
  • Why do atoms combine in an ionic bond
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!