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
Dimas [21]
3 years ago
8

Which scientist invented the first simple Microscope ?

Chemistry
1 answer:
Vinvika [58]3 years ago
6 0

Answer:

D.  Leeuwenhoek

Explanation:

You might be interested in
An internal combustion engine relies primarily on the efficient production of energy by the combination of oxygen (02) and gasol
jeka57 [31]
Answer is: <span>the exact ratio of oxygen to octane for is 12.5 : 1.
</span>Balanced chemical reaction: C₈H₁₈ + 25/2O₂ → 8CO₂ + 9H₂O or multiply by 2:
2C₈H₁₈ + 25O₂ → 16CO₂ + 18H₂O.
There same number of atoms on both side of balanced chemical reaction: eight carbon atoms, eighteen hydrogen atoms and twenty five oxygen atoms.

7 0
3 years ago
What is the greenhouse effect?
Vladimir [108]

Answer:

Answer:

C

Explanation:

Greenhouse gases allow for sunlight, and the heat radiation to enter the atmosphere, and then prevent it from exiting the atmosphere. Known as the greenhouse effect.

Explanation:

4 0
2 years ago
Read 2 more answers
In the scientific method, analysis should follow right after
alina1380 [7]
Observation/ question
research
hypothesis
<span>experiment
</span>analysis
conclusion
7 0
3 years ago
The diameter of a hydrogen atom is 106 pm. Find the length in kilometers of a row of 4.34 x 1023 hydrogen atoms?
valina [46]

The length in kilometers of a row of 4.34 x 1023 hydrogen atoms is 4.34 x 10¹⁴ km.

<h3>Length of the entire hydrogen atoms</h3>

The length of the entire hydrogen atom is calculated as follows;

Length of the row = number x diameter of one

Length of the row = 4.34 x 10²³ x 10⁶ x 10⁻¹²

Length of the row = 4.34 x 10¹⁷ m

Length of the row = 4.34 x 10¹⁴ km

Thus, the length in kilometers of a row of 4.34 x 1023 hydrogen atoms is 4.34 x 10¹⁴ km.

Learn more about diameter of hydrogen atom here: brainly.com/question/13796082

#SPJ1

3 0
2 years ago
A gas sample has a temperature of 22c with an unknown volume. The same gas has a volume of 456 mL when the temperature is 86c wi
Mkey [24]

The initial volume is 116.65 mL

<u>Explanation:</u>

<u />

Given:

Temperature, T₁ = 22°C

T₂ = 86°C

Volume, V₂ = 456 m

V₁ = ?

According to Charle's law:

\frac{V_1}{T_1} = \frac{V_2}{T_2}

Substituting the values:

\frac{V_1}{22} =\frac{456}{86} \\\\V_1 = \frac{456 X 22}{86} \\\\V_1 = 116.65 mL

Therefore, the initial volume is 116.65 mL

3 0
3 years ago
Other questions:
  • Are changes in the state of matter (phase) considered physical or chemical changes? Why?
    15·1 answer
  • An element is a main constituent of paper, diamond and clothes etc. It forms covalent bonds with itself and other elements:- (1)
    7·2 answers
  • You throw a barbeque for your friends. Before you start the grill, your propane tank has a pressure of 78 psi. When you’re finis
    6·2 answers
  • Calculate the amount of heat released when 27.0 g H2O is cooled from a liquid at 314 K to a solid at 263 K. The melting point of
    9·2 answers
  • Urgent plz help thanks!
    12·1 answer
  • What is the mass of the helium nucleus?
    12·1 answer
  • The element silver has an atomic weight of 108 and consists of two stable isotopes silver-107 and silver-109. The isotope silver
    6·1 answer
  • A solid and a liquid are shaken together in a test tube to produce a milky mixture that eventually separates into a clear liquid
    8·2 answers
  • What is the formula mass of the fictitious compound: AB2?
    11·1 answer
  • Electronegativity difference of F and Cl: <br><br> ionic<br><br> covalent
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!