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-must have organized structure
- have a suitable habitat
- Be able to reproduce
- Grow and develop
- Use energy
- Respond to stimuli
Hope this helps!
The reaction in which two reacting molecules exchange their partner ions in aqueous solution and form two new compounds.
multimeter is an electronic instrument used to measure the three basic electrical characteristics: voltage, current and resistance. It has multiple functions and acts like ohmmeter, voltmeter and ammeter and also used for household wiring, electric motors, testing batteries and power supplies.
Answer:
An acid is substance that produces <u>H⁺ </u>ions in solution, which is also written as the hydronium ion <u>H₃O⁺</u>. A base is a substance that produces an ion with the formula <u>OH⁻ </u>and the name <u>hydroxyl</u> ion.
Explanation:
An acid is substance that produces H⁺ ions in solution, which is also written as the hydronium ion H₃O⁺. A base is a substance that produces an ion with the formula OH⁻ and the name hydroxyl ion.
Acid:
An acid is the substance that sour in taste and turns the color of litmus paper from blue to red.
pH of acid is less than seven.
Base:
An acid is the substance that bitter in taste and turns the color of litmus paper from red to blue.
The pH of base is 7-14.
Arrhenius gives the simplest definition of acid and base.
Arrhenius acid:
A substance that increase the concentration of hydronium ion in solution is called acid.
HNO₃ → H⁺ + NO₃⁻
(H₂O)
Arrhenius base:
A substance that increase the concentration of OH⁻ ion in solution is called base.
KOH → K⁺ + OH⁻
Answer:
Percentage by mass of calcium carbonate in the sample is 93.58%.
Explanation:
Assumptions:
- calcium carbonate was dissolved completely and the amount of carbon dioxide released was proportional to the amount of calcium carbonate.
- the sample did not contain any other compound that released or reacted with carbon dioxide.
![PV = nRT](https://tex.z-dn.net/?f=PV%20%3D%20nRT)
![n = \frac{PV}{RT}](https://tex.z-dn.net/?f=n%20%3D%20%5Cfrac%7BPV%7D%7BRT%7D)
![P = 791 mmHg = \frac{791 mmHg}{760 mmHg} x 1 atm = 1.040789 atm.](https://tex.z-dn.net/?f=P%20%3D%20791%20mmHg%20%3D%20%5Cfrac%7B791%20mmHg%7D%7B760%20mmHg%7D%20x%201%20atm%20%3D%201.040789%20atm.)
![R = 8.314 \frac{J}{K*mol} = 0.082 \frac{L*atm}{K*mol}](https://tex.z-dn.net/?f=R%20%3D%208.314%20%5Cfrac%7BJ%7D%7BK%2Amol%7D%20%3D%200.082%20%5Cfrac%7BL%2Aatm%7D%7BK%2Amol%7D)
![T = 20^{0}C + 273^{0} C = 293 K](https://tex.z-dn.net/?f=T%20%3D%2020%5E%7B0%7DC%20%2B%20273%5E%7B0%7D%20C%20%3D%20293%20K)
![n = 0.0493839 mol.](https://tex.z-dn.net/?f=n%20%3D%200.0493839%20mol.)
given the equation of the reaction:
![CaCO_{3} + 2HCL = CaCl_{2} + CO_{2} + H_{2}O](https://tex.z-dn.net/?f=CaCO_%7B3%7D%20%20%2B%202HCL%20%3D%20%20CaCl_%7B2%7D%20%20%2B%20CO_%7B2%7D%20%2B%20H_%7B2%7DO)
from assumption:
amount carbon dioxide = amount of calcium carbonate
![n(CaCO_{3} ) = n(CO_{2} )](https://tex.z-dn.net/?f=n%28CaCO_%7B3%7D%20%29%20%3D%20n%28CO_%7B2%7D%20%29)
reacting mass ( m ) = Molar Mass ( M ) * Amount ( n )
![m(CaCO_{3} ) = n(CaCO_{3} ) * M(CaCO_{3} )](https://tex.z-dn.net/?f=m%28CaCO_%7B3%7D%20%29%20%20%20%3D%20%20%20n%28CaCO_%7B3%7D%20%29%20%20%2A%20%20%20M%28CaCO_%7B3%7D%20%29)
m = 0.04938397
* 100
= 4.93839 ![g](https://tex.z-dn.net/?f=g)
percentage by mass of CaC
=
.