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
adelina 88 [10]
3 years ago
7

Can somebody help me with this question please

Chemistry
1 answer:
Tasya [4]3 years ago
7 0

Answer:

concave lens

Explanation:

it's concave lens because it diverges the ray/beam of light.

You might be interested in
Someone pls help me I will make you brain
Olegator [25]

Answer:

the second answer

Explanation:

5 0
3 years ago
Read 2 more answers
Once the torch is lit why must the acetylene flow be increased until the flame stops smoking
mojhsa [17]
Once the torch is lit, the acetylene flow must be increased until the flame stops smoking <span>before the oxygen is turned on for adjustment in order to keep the tip of the torch cool.

You should also note that while lighting the torch, you should keep the spark lighter near the tip but not covering it.</span>
5 0
3 years ago
What is the purpose of light energy?
zimovet [89]
The sun gives off light energy to help plants photosynthesize and make food
8 0
2 years ago
A sample of vinegar was found to have an acetic acid concentration of 0.8846 m. What is the acetic acid % by mass? Assume the de
jenyasd209 [6]

Answer:

5.3%

Explanation:

Let the volume be 1 L

volume , V = 1 L

use:

number of mol,

n = Molarity * Volume

= 0.8846*1

= 0.8846 mol

Molar mass of CH3COOH,

MM = 2*MM(C) + 4*MM(H) + 2*MM(O)

= 2*12.01 + 4*1.008 + 2*16.0

= 60.052 g/mol

use:

mass of CH3COOH,

m = number of mol * molar mass

= 0.8846 mol * 60.05 g/mol

= 53.12 g

volume of solution = 1 L = 1000 mL

density of solution = 1.00 g/mL

Use:

mass of solution = density * volume

= 1.00 g/mL * 1000 mL

= 1000 g

Now use:

mass % of acetic acid = mass of acetic acid * 100 / mass of solution

= 53.12 * 100 / 1000

= 5.312 %

≅ 5.3%

3 0
3 years ago
The freezing point of pure chloroform is -63.5°C, and its freezing point depression constant is 4.07°C•kg/mol. If the freezing p
Nady [450]

Answer:

-20.22

Explanation:

4 0
2 years ago
Other questions:
  • Which one of these is a mixture ?
    15·1 answer
  • List the Earth names for the 30 alien elements in order of atomic number
    13·1 answer
  • A block of iron has the dimension of 3.00 cm x 3.00 cm x 3.00 cm. it's has a mass of 213 g. water has a density of 100 g/cm^3. W
    8·2 answers
  • ASAP..pls need help.....
    13·1 answer
  • What is the tiny structure inside a cell
    7·1 answer
  • What is waters characteristic shape due to?
    12·2 answers
  • Select the reason cities tended to develop at the fall line on rivers.
    11·1 answer
  • 5. If you evaluated 5 solvents as possible recystallization solvents do you think it is generally true that the solvent which ap
    10·1 answer
  • How do alpha particles compare to gamma rays?
    8·2 answers
  • Fern spores usually form during: winter summer fall spring
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!