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
Oxana [17]
3 years ago
9

How many grams of sucrose must be dissolved in 250 ml to prepare the 0.15 mol / L solution?

Chemistry
1 answer:
Harlamova29_29 [7]3 years ago
6 0

Answer:

How could you prepare 250 mL of 0.20M NaCl using only a solution of 1.0M NaCl and water? To prepare a 250 mL 0.20 M NaCl solution, I would place 50 mL of the 1.0 stock solution to a 250 mL volumetric flask and then add 200 mL of water. A bottle of the antiseptic hydrogen peroxide (H2O2) is labeled 3.0% (v/v).

You might be interested in
Assuming that both cases describe hydrogen‑like atoms with one electron, for which case is more energy emitted or absorbed?
Nana76 [90]

Assuming that both cases describe hydrogen‑like atoms with one electron, More energy is emitted or absorbed for case 2. The correct option is D.

<h3>What is emitting of energy, by electron?</h3>

The energy of the electron decreases as it changes levels, and emission of photons happens in the atom.

With the electron moving from a higher to a lower energy level, the photon is emitted. The photon's energy is the same as the energy lost by an electron moving to a lower energy level.

Thus, the correct option is D, More energy is emitted or absorbed for case 2.

Learn more about emitting of energy

brainly.com/question/14350185

#SPJ4

5 0
2 years ago
Describe the progress of the formation of an ionic bond in terms of electrons
umka21 [38]

Answer:

Ionic bonding is the complete transfer of valence electron(s) between atoms. It is a type of chemical bond that generates two oppositely charged ions. In ionic bonds, the metal loses electrons to become a positively charged cation, whereas the nonmetal accepts those electrons to become a negatively charged anion.

3 0
3 years ago
Which element would be the least similar to magnesium (Mg)?<br> A. Sr<br> B. Na<br> C. Be<br> D. Ca
Alika [10]

Answer:

B: NA

Explanation:

this is the apex answer

3 0
4 years ago
what is the molecular formula for a compound that is 39.99% carbon, 6.73% hydrogen, and 53.28% oxygen and has a molar mass of 18
4vir4ik [10]

Answer:

IDEK

Explanation:

5 0
3 years ago
The second-order rate constants for the reaction of oxygen atoms witharomatic hydrocarbons have been measured (R. Atkinson and J
Pepsi [2]

Answer:

A = 1,13x10¹⁰

Ea = 16,7 kJ/mol

Explanation:

Using Arrhenius law:

ln k = -Ea/R × 1/T + ln(A)

You can graph ln rate constant in x vs 1/T in y to obtain slope: -Ea/R and intercept is ln(A).

Using the values you will obtain:

y = -2006,9 x +23,147

As R = 8,314472x10⁻³ kJ/molK:

-Ea/8,314472x10⁻³ kJ/molK = -2006,9 K⁻¹

<em>Ea = 16,7 kJ/mol</em>

Pre-exponential factor is:

ln A = 23,147

A = e^23,147

<em>A = 1,13x10¹⁰</em>

<em></em>

I hope it helps!

6 0
3 years ago
Other questions:
  • What's a word equation
    8·1 answer
  • Only 2 of them are correct.
    5·1 answer
  • Name an element or elements in the periodic table that you would expect to be chemically similar to potassium. check all that ap
    14·1 answer
  • The figure above shows the electric field around a positive charge. Where is the field strongest
    7·1 answer
  • If the density is 0.1 g/cm^3 and the volume is 5cm^3, what is the mass?
    7·1 answer
  • Which explains the basis of the biuret test?
    9·1 answer
  • In standardizing a naoh solution a student found that 25.55cm of base neutralize exactly 21.35cm of 0.12M HCl find the molarity
    11·1 answer
  • Which force is expected to cause a body to accelerate?
    15·1 answer
  • What is the value of c?<br> 56.70
    5·1 answer
  • a solid substance a is soluble in water to the extent of 10 mg/ml of water at 25oc and 100 mg/ml of water at 100oc. you have a s
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!