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
Rama09 [41]
3 years ago
8

If 240 mL of water is added to 13 mL of 5.0 M NaCl solution,

Biology
1 answer:
zavuch27 [327]3 years ago
8 0

Answer:

The correct answer is 0.26 M

Explanation:

The initial concentration of NaCl solution (Ci) is 5.0 M. The initial volume of the solution (Vi) is 13 mL. The final volume is the addition of 240 mL to 13 mL (Vf= 13 mL + 240 mL= 253 mL).

In order to calculate the final concentration of the solution (Cf) we can use the following expression:

Ci x Vi= Cf x Vf

This mathematical expression is often used to calculate concentrations in dilution procedures. So, we introduce Ci, Vi an Vf in the expression and we calculate Cf:

Cf= (Ci x Vi)/Vf= (5.0 M x 13 mL)/253 mL= 0.257 M ≅ 0.26 M

You might be interested in
50 POINTS+ BRAINLIEST!
m_a_m_a [10]

Answer:

B.) Oceanic crust

Explanation:

The oceanic crust is generally thinner than other Earth layers. The oceanic crust is the thinnest layer of the Earth, amounting for less than 1 percentage of earth's volume.

5 0
2 years ago
In a double-blind procedure, knowledge about whether a drug or a placebo is being administered is withheld from __________.
vagabundo [1.1K]
From the individual administering the drug and the person receiving the drug
3 0
3 years ago
How do endocrine glands differ from other body glands, such as sweat glands?
dusya [7]

Answer: endocrine glands release chemicals into the bloodstream

Explanation: GradPoint

4 0
2 years ago
Put these steps in the order in which they occur in light-dependent reactions. Electrons are transferred from photosystem II to
Tamiku [17]

Explanation:

  1. Light energy is absorbed and transferred to the reaction center.
  2. A water molecule is split.
  3. Electrons are transferred from photosystem II to photosystem I.
  4. ATP is synthesized from ADP and inorganic phosphate.

Further Explanation:

Photosynthesis is a chemical pathway that’s integral to producing energy in plants and other primary producers. Energy in the form of molecules of glucose is produced from light, water and carbon dioxide while oxygen is released. This occurs in several complex steps, photosynthesis is a rate limited reaction, depends on several factors including carbon dioxide concentration, ambient temperature and light intensity; the energy is retrieved from photons, I.e. particles of light, and water is used as a reducing agent. This occurs in the thykaloids, where pigment molecules like chlorophyll reside.

The chloroplast is a membrane bound organelle found in plants. It contains several invaginations of  a plasma membrane called the thylakoid membrane. This contains chlorophyll pigments, in stacks called granum, while the internal spaces of the organelle are called the lumen. Liquid surrounds the granum, forming the stroma.

During the light reaction:

  • Light is absorbed by pigments in phosystem II (PSII). This energy is transferred among pigments til it gets to the reaction center, and is transferred to P680; this promotes an electron to a higher energy level where it then goes to an acceptor molecule.
  • Water supplies the chlorophyll in plant cell with replacement electrons for the ones removed from photosystem II. Additionally, water (H2O) split by light during photolysis into H+ and OH- acts as a source of oxygen along with functioning as a reducing agent.
  • the electron moves down an electron transport chain (ti PS I)where it experiences continuous energy loss. This energy fuels the pumping of H+ from the stroma to thykaloid, leading to the formation of a gradient. The H+ move along their gradient and cross through ATP synthase, into the the stroma.
  • ATP synthase converts ADP and Pi to the energy storage molecule  ATP.
  • The electron gets to photosystem I where it  goes to pigments at P700. It absorbs light energy, the electron is promoted to a higher energy level, and passed to an electron acceptor. This leaves a space for another electron which is then replaced by one from photosystem II.
  • in the ETC,  the molecule NADP is reduced to NADPH by providing H+ ions. NADP and NADPH are integral to the Calvin cycle where monosaccharides or sugars like glucose are produced after the modification of several molecules.

Learn more about Photosynthesis at brainly.com/question/4216541

Learn more about cellular life at brainly.com/question/11259903

#LearnWithBrainly

5 0
3 years ago
Which would be an adaptation in a very cold place, but not in a rainforest?
zysi [14]
Answer: The adaptations like paddy feet and fur on the outer body is an adaptation for very cold place but not for the rain forest. Explanation: If the outer body of the organism is made of fur then it will protect the inside body from cold and will provide warmth.
4 0
3 years ago
Other questions:
  • What does the mitochondria do in an animal cell?
    13·1 answer
  • True or false? DNA is the shortened form of the term ‘Deoxyribonucleic acid’?
    12·2 answers
  • Why does the Owl Butterfly have a pattern of an owls face on it's wings
    10·2 answers
  • The type of immunoglobulin produced through intranasal vaccination is A. IgA B. IgE C. IgD D. IgM
    12·1 answer
  • What is the net primary productivity of the tropical rainforest if gross primary productivity in a tropical rainforest is 6 kcal
    12·2 answers
  • This structure can only be found in a plant cell and not an animal cell. Nucleus Ribosomes Cell wall Mitochondria
    10·2 answers
  • Can someone help with these two questions
    9·2 answers
  • Takes ______ energy from the light independent reactions and __________ from the air to produce _________.
    9·1 answer
  • 40. A nurse is caring for patient whose diagnosis of multiple myeloma is being treated with bortezomib. The nurse
    5·1 answer
  • Frogs in a certain population can be either green or bright yellow. The green color allows the frogs to blend in with their surr
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!