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
leva [86]
3 years ago
13

Which organs are part of the respiratory system ​

Chemistry
1 answer:
Luden [163]3 years ago
6 0
It includes the lungs, airways, and blood vessels. The muscles that power your lungs are also a part of the respiratory system.
You might be interested in
Where does nearly all life get its energy from? *<br> Oxygen<br> A.Sun<br> B.Produce<br> C.Soil
meriva
The sun hope this helps
5 0
2 years ago
Read 2 more answers
5.(a) Give the names and symbols of respective elements. (5)
Leya [2.2K]

Answer:

Elements:

Platinum - Pt

Silicon - Si

Lead - Pb

Hydrogen- H

Silver - Ag

Symbols:

Pr - Praseodymium

K - Potassium

Br - Bromine

Mg - Magnesium

Hg - Mercury

6 0
2 years ago
If 25 mL of a HCl solution of unknown concentration was neutralized with 10 mL of a 0.30 M NaOH solution, what was the original
QveST [7]

Answer:

0.12 M

Explanation:

Step 1: Write the balanced equation

NaOH + HCl ⇒ NaCl + H₂O

Step 2: Calculate the reacting moles of NaOH

10 mL of a 0.30 M NaOH solution react.

0.010L \times \frac{0.30mol}{L} = 3.0 \times 10^{-3} mol

Step 3: Calculate the reacting moles of HCl

The molar ratio of NaOH to HCl is 1:1. The reacting moles of HCl are 1/1 × 3.0 × 10⁻³ mol = 3.0 × 10⁻³ mol.

Step 4: Calculate the concentration of HCl

3.0 × 10⁻³ mol of HCl are in 25 mL of solution.

M = \frac{3.0 \times 10^{-3} mol}{0.025L} = 0.12 M

5 0
3 years ago
An aqueous solution is 4.44 M nitric acid and the density of the solution is 1.42 g/mL. Calculate the mole fraction of this solu
prohojiy [21]

The mole fraction of HNO3 is  0.225

<u>Explanation:</u>

<u>1.</u>Given data

Density = 1.429 /ml

Mass% = 63.01 g HNO3 / 100g of solution

The mass of 63.01 g is in 100 / 1.142 /ml of solution

Or 63.01 g in 55.7 mL

Molarity = 15.39 moles / L

Mass of water in 100g = 100 - 63.01=36.99 g

So 63.01 grams in 36.99 grams of water

So mass of HNO3 in 1000grams of water = 63.01* x 1000 / 36.99 = 1703

Moles of HNO3 in 1000g = 1703 / 63.01 = 27.03 moles

Molality = 27.03 molal (mole / Kg)

Mole fraction = Mole of HN03 / Moles of water + mole of HNO3

Mole of water = 62/ 18 = 3.44

Moles of HNO3 = 63.01 / 63.01 = 1.000

Mole fraction = 1.000 / 3.44 + 1.000 = 0.225

The mole fraction of HNO3 is  0.225

7 0
3 years ago
Which of the following is equivalent to 2100 gram
BabaBlast [244]

10 decigrams are equivalent to 1 gram, so 2,100 grams are equivalent to 2100 x 10. This makes 21,000.

3 0
3 years ago
Other questions:
  • If the role of neutrons in an atom is to maintain stability, how is a hydrogen atom stable in nature? ( hydrogen atom is the onl
    12·1 answer
  • if 2.0 g of hydrogen sulfide, H2S(g) reacts with 5.0 g of sodium hydroxide what mass of the excess reactant is present when the
    14·1 answer
  • You have 723 ml of 3.99 M HCl. Using a volumetric pipet, you take 326 ml of that solution and dilute it to 976 ml in a volumetri
    7·1 answer
  • A block of ice has edge lengths of 8.00 cm each and a mass of 476
    7·1 answer
  • Two atoms with the same number of protons but a different number of neutrons are
    11·1 answer
  • An experiment applies heat to a substance and produces a gas that is a new and different substance. Choose the true statement.
    12·1 answer
  • Water is believed to be one of the best fire extinguishers then why it is so that fire in oil spills over ocean/sea is difficult
    9·1 answer
  • What are the properties of PLA plastic PLEASE HELP
    6·1 answer
  • I will give thanks, profile thanks, brainliest and 5 star
    5·2 answers
  • Given the following reaction:
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!