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
Svetradugi [14.3K]
3 years ago
8

Why is it important to start at the zero mark of a ruler/meterstick + triple beam balance when making measurements?

Chemistry
1 answer:
sergeinik [125]3 years ago
3 0
Because if you start at one for example you starting at a extra cm/m/mm. So when you get your measurement result it will be wrong by just one cm/m/mm. Hope this wasn't too confusing.
You might be interested in
Americans spend up to $100 billion annually for bottled water (41 billion gallons). The only beverages with higher sales are car
grigory [225]

<u>Answer:</u> C) be hypertonic to Tank B.

<u>Explanation: </u>

<u> The ability of an extracellular solution to move water in or out of a cell by osmosis</u> is known as its tonicity. Additionally, the tonicity of a solution is related to its osmolarity, which is the <u>total concentration of all the solutes in the solution. </u>

Three terms (hypothonic, isotonic and hypertonic) are used <u>to compare the osmolarity of a solution with respect to the osmolarity of the liquid that is found after the membrane</u>.  When we use these terms, we only take into account solutes that can not cross the membrane, which in this case are minerals.

  1. If the liquid in tank A has a lower osmolarity (<u>lower concentration of solute</u>) than the liquid in tank B, the liquid in tank A would be hypotonic with respect to the latter.
  2. If the liquid in tank A has a greater osmolarity (<u>higher concentration of solute</u>) than the liquid in tank B, the liquid in tank A would be hypertonic with respect to the latter.
  3. If the liquid in tank A has the same osmolarity (<u>equal concentration of solute</u>) as the liquid in tank B, the liquid in tank A would be isotonic with respect to the latter.

In the case of the problem, option A is impossible because the minerals can not cross the membrane, since it is permeable to water only. There is no way that the concentration of minerals decreases in tank A, so <u>the solution in this tank can not be hypotonic with respect to the one in Tank B. </u>

Equally, both solutions can not be isotonic and neither we can say that the solution in tank A has more minerals that the one in tank B because the liquid present in tank B is purified water that should not have minerals. Therefore, <u>options B and D are also not correct.</u>

Finally, the correct option is C, since in the purification procedure the water is extracted from the solution in tank A to obtain a greater quantity of purified water in tank B. In this way, the solution in Tank A would be hypertonic to Tank B.

5 0
3 years ago
How the ph values can be used to compare the strength of hydrochloric acid and ethanoic acid?
devlian [24]
An aqueous solution of hydrozen chloride: Strongly​ corrosive acids
A colouriess punpent liquid widely used in manufacturing plastic and pharmaceutical
3 0
3 years ago
If the mass is 10g and the volume<br> is 2cm3 what is the density?
SSSSS [86.1K]

Answer:

The density is 5 g/cm3

Explanation:

The density (δ) is the ratio between the mass and the volume of a compound:

δ=m/v= 10 g/2 cm3= 5 g/cm3

3 0
3 years ago
Two solids, A and B, are located in the same family on the periodic table. A sample of each is placed in a beaker of HCL. Substa
Vlad [161]
What do the bubbles indicate? <span>chemical reaction with HCl, release of H2(g) 
</span>
Where the substances are located in relation to one another on the periodic table and the activity series? <span>A is above B on the periodic table but B is above A in the activity series.
</span>
The name of the family the substances could be in ?  <span>alkaline earth, alkali metals. Either group 1 or group 2.
</span>
<span>What substance will have a larger atomic radius? B</span>
What substance will have a larger ionization energy? A
4 0
3 years ago
What is the percent by mass of oxygen in carbon dioxide (CO2)?
wariber [46]

Answer:

= 72.73%

Explanation:

The percentage by mass of an element is given by;

% element = total mass of element in compounds/molar mass of compound × 100

The mass of oxygen in carbon dioxide = 32 g

Molar mass of CO2 = 44 g

Therefore;

% of O2 = 32/44 × 100%

             <u>= 72.73%</u>

8 0
3 years ago
Other questions:
  • What is the volume of 21.0 g of nitrogen gas at stp?
    15·1 answer
  • Which best explains how heat plays a role in the movement of materials within Earth's interior?
    7·2 answers
  • how is rain, hail, and sleet similar and how are they different. Image of question attached. I really need help
    8·1 answer
  • What are the exceptions to the periodic trends in ionization energy?
    8·1 answer
  • How do u draw an electron dot diagram of an aluminum atom
    12·2 answers
  • What is the importance of different types of mirrors and lenses?​
    8·1 answer
  • 6. Matter with a definite volume but no definite shape is a<br> A gas<br> B. solid<br> C.liquid
    13·1 answer
  • How do the mass and height of an object affect the gravitational potential energy?
    12·1 answer
  • In the laboratory you dilute 5.32 mL of a concentrated 6.00 M perchloric acid solution to a total volume of 100 mL. What is the
    11·1 answer
  • Which of the atoms below are least likely to violate the octet rule?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!