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
melamori03 [73]
3 years ago
9

All please guys help me please ​

Chemistry
1 answer:
MA_775_DIABLO [31]3 years ago
7 0

Explanation:

<em>Percentage </em><em>composition </em><em>by </em><em>mass</em>

  1. <em>2</em><em>1</em><em>.</em><em>2</em><em> </em><em>%</em>
  2. <em>4</em><em>6</em><em>.</em><em>6</em><em>%</em>
  3. <em>3</em><em>5</em><em>%</em>
  4. <em>2</em><em>1</em><em>.</em><em>2</em><em> </em><em>%</em>
You might be interested in
How is this SI unit of temperature related to the metric unit of Celsius?
shtirl [24]

Answer:

Celsius is currently a derived unit for temperature in the SI system, kelvin being the base unit. ... The two main reference points of the Celsius scale were the freezing point of water (or melting point of ice) being defined as 0 °C and the boiling point of water being 100 °C.

Explanation:

Hope it helps

3 0
3 years ago
Which of the following statements about tolerance range is true?
vovikov84 [41]
A. Tolerance range is different for different organisms.
6 0
3 years ago
If 3.5 g H2 react with 18.7 g O2 what is the limiting reactant?
Pachacha [2.7K]
O2 is the limiting reactant 

3 0
4 years ago
Read 2 more answers
7.5 moles of nitrogen gas (N2) is formed in the following reaction. How many grams
AfilCa [17]

Answer:

Mass = 255 g

Explanation:

Given data:

Number of moles of nitrogen = 7.5 mol

Mass of ammonia formed = ?

Solution:

Chemical equation:

3H₂ + N₂      →    2NH₃

Now we will compare the moles of nitrogen and ammonia.

             N₂         :        NH₃

               1          :         2

              7.5       :       2/1×7.5 = 15

Mass of ammonia:

Mass = number of moles × molar mass

Mass = 15 mol × 17 g/mol

Mass = 255 g

6 0
3 years ago
What type of chest tube system does this statement describe?
Komok [63]

Answer:

<em>Dry suction chest tube system</em>

Explanation:

<em>The dry suction drains that are self-regulating today use a small, adjustable regulator installed into the drain. </em>

So long as there is enough air flow from the suction of the wall (that will be shown on the drain) it will respond correctly to changes in the pressure of the source or the patient to retain suction at the drain level.

It's also a quiet mode of activity.

4 0
3 years ago
Other questions:
  • A changing magnetic field produces an electric field with open loop field lines.
    6·1 answer
  • The mass of a radioactive substance follows a continuous exponential decay model, with a decay rate parameter of 8.1% per day. f
    8·1 answer
  • A battery is connected at its positive end by a wire to the head of an iron nail. The wire then coils aground the nail to its ti
    9·2 answers
  • Given the name of a binary molecular compound, describe how to write its formula. Use dinitrogen trioxide as an example.
    5·2 answers
  • How will the concentration of H+ and OH− ions change when a substance with a pH 11.4 is added to water?
    13·2 answers
  • Consider 10.0 g of helium gas (He) in a rigid steel container. If you add 10.0 g of neon gas (Ne) to this container, which of th
    6·1 answer
  • . Write the balanced equation, then outline the steps necessary to determine the information requested in each of the following:
    7·1 answer
  • What is the charge on an ion with 21 protons, 30 neutrons, and 18 electrons.
    11·1 answer
  • 15. Sodium chloride is called an electrovalent compound whereas carbon dioxide is called covalent compound why?​
    7·1 answer
  • What is neutralization reaction?​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!