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
Norma-Jean [14]
4 years ago
14

How do scientist know that atoms and molecules combine in well-ordered arrays?

Chemistry
1 answer:
xxTIMURxx [149]4 years ago
7 0
They have microscopes to see small objects such as atoms and molecules
You might be interested in
Metals are extracted from their ores.
zvonat [6]
1.  Copper is very useful, so people want as much as possible.
2.  We are running out, so we are extracting all the copper that we can to keep up with our needs.
7 0
3 years ago
What is the molarity of a NaOH solution if 28.2 mL of a 0.355 M H2SO4 solution is required to neutralize a 25.0-mL sample of the
Anni [7]

Answer:

A) 0.801

Explanation:

The reaction that takes place is:

  • 2NaOH + H₂SO₄ → Na₂SO₄ + 2H₂O

First we c<u>alculate the H₂SO₄ moles that reacted</u>:

  • 0.355 M * 28.2 mL = 10.011 mmol H₂SO₄

Now we <u>convert H₂SO₄ moles to NaOH moles</u>:

  • 10.011 mmol H₂SO₄ * \frac{2mmolNaOH}{1mmolH_2SO_4} = 20.022 mmol NaOH

Finally we <u>calculate the molarity of the NaOH solution</u>:

  • 20.022 mmol NaOH / 25.0 mL = 0.801 M

So the answer is option A.

3 0
3 years ago
This is due at 12am HELP!!
Lisa [10]

Answer:

I have the same

Explanation:

like I have the same homework as you are u in my class lol?

4 0
3 years ago
Which statement illustrates how engineering has influenced society?
Amanda [17]

Answer:

i think O.C is correct answer

Explanation:

<h2>hope it's helps you </h2>

hello hi bye bye item until you know Nana Nana Nana Nana Nana Nana Nana Nana Nana Nana

4 0
4 years ago
Read 2 more answers
Calculate the period when the frequency is 50Hz.​
liraira [26]

Answer:

For example, a wave with a time period of 2 seconds has a frequency of 1 ÷ 2 = 0.5 Hz. A radio wave has a time period of 0.0000003333333 seconds.

8 0
3 years ago
Other questions:
  • Ammonia (NH3) burns in air to form nitrogen dioxide and water. Calculate grams of nitrogen dioxide produced if 4.0 grams of ammo
    14·1 answer
  • 3cu(s) + 8hno3(aq) ——&gt; 3cu(no3)2(aq) + 2no(g) + h2o(l) whichr eactan is the reducing agent?
    6·1 answer
  • What are the laws of Newton?
    8·2 answers
  • Which is an example of a homogeneous mixture?
    10·1 answer
  • Part B
    14·1 answer
  • Oxygen is denoted as 16O8. How many protons and neutrons does an oxygen atom have?
    14·2 answers
  • Scientific models are based on a set of observations. true or false
    5·2 answers
  • Science Tectonic Plates Cause and Effect (Converge, Diverge and Transform)
    9·1 answer
  • A student dissolves 19.g of sucrose C12H22O11 in 425.mL of a solvent with a density of 0.82/gmL. The student notices that the vo
    9·1 answer
  • Select the reagents you would use to synthesize the compounds below from benzene. Use the minimum number of steps.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!