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
sashaice [31]
3 years ago
13

A 6.26 g sample of a solid containing ni is dissolved in 20.0 ml water. a 5.00 ml aliquot of this solution is diluted to 100.0 m

l and analyzed in the lab. the solution was determined to contain 5.28 ppm ni. determine the molarity of ni in the 20.0 ml solution.
Chemistry
1 answer:
saveliy_v [14]3 years ago
5 0
Concentration of Ni in 20mL = 5.28ppm x dilution factor = 5.28 x 100/5 = 105.6 ppm = 105.6 mg/L 

molar mass of Ni = 58.6934 g
<span>Molarity of Ni = 100.40 x 10^{-3} / 58.6934 = 1.71 x 10^{-3} M = 1.71 mM. </span>
You might be interested in
HEELLP PLEASEE!!! I GIVE 30 POINTTS + MARK BRAINLIEST!!
zepelin [54]
24. <span>Valence electrons are most loosely held by the atom and are involved in chemical reactions. Chemical reactions occur when valence electrons are shared between atoms. The number of valence electrons determines how these reactions take place and what kind of bonds they form.

25 </span><span>Sodium has one valence electron and chlorine has seven valence electrons. The Ione valence electron from sodium is lost and is transferred to the chlorine atom. The result is a sodium ion with a charge of 1+ and a chloride ion with a charge of 1-. The oppositely charged ions attract each other and the charges balance to make a compound that is electrically neutral.

26. </span><span>Ionic compounds have high melting points and high boiling points compared to molecular compounds. Ionic compounds that are dissolved in water or melted will conduct electricity. Molecular compounds do not conduct electricity in either case. 

27. </span><span>A covalent bond is formed when two atoms share valence electrons. Neither atom loses electrons or takes electrons from the other. No charged particles form. In an ionic bond, one or more electrons are transferred from one atom to another. Atoms that lose electrons become positively charged ions, and atoms that gain electrons become negatively charged ions. These oppositely charged particles then attract each other.

28. </span><span>A metal crystal consists of positively charged metal ions embedded in a "sea" of loosely held valence electrons that can move around easily. Heat travels through materials as the increased motion of the particles in the hotter parts of the material is passed along to the particles in the cooler parts. In a metal, since particles are easily set in motion, heat is easily transferred or conducted. The same is true for the conduction of electricity. Electricity can flow when charged particles, such as electrons, are free to move. Since the electrons in a metal crystal can move freely among the atoms, electricity is easily conducted.</span>
4 0
3 years ago
I charged atom is called a _____.<br><br> Proton<br> Electrolyte<br> Isotope<br> Ion
Shalnov [3]

1 charged atom is called a Proton

8 0
3 years ago
A ------------ ----------------- is the dying out of a large number of species on a global scale
ziro4ka [17]

Answer:

Extinction event or sometimes known as Mass extinction

Explanation:

These events typically are typically widespread and rapid decrease in the biodiversity (which takes into account spread and existence of current species). The worst mass extinction was Permian–Triassic extinction where over 90% of species of organisms vanished.

5 0
3 years ago
What is the structural formula of 2-methylbutan-2-ol (sometimes called 2-methyl-2-butanol)?
grigory [225]
<span>The structural formula of 2-methylbutan-2-ol is in Word document below.
</span>2-methyl-2-butanol is organic compound and belongs to alcohols. Hydroxyl <span>functional group is on second saturated carbon atom of butane and also methyl group (-CH</span>₃) is on second saturated carbon atom of main chain (butane).<span>

</span>
Download docx
4 0
3 years ago
Read 2 more answers
Choose all the answers that apply.
AnnZ [28]

Answer:

accepting your faults

seeing exercise as a treat

looking at your ultimate goal

Explanation:

8 0
3 years ago
Other questions:
  • Which of the following compounds exhibit hydrogen bonding?
    14·1 answer
  • What mass of sodium oxalate na2c2o4 is needed to prepare 0.250 l of a 0.100 m solution?
    15·2 answers
  • Which compound is an acid? A. C2H4 B. KCl C. NH3 D. HNO3
    13·2 answers
  • Why was it possible to neutralize HCI using NaOH?
    6·1 answer
  • What can be said about a small Ksp value?
    5·1 answer
  • Which of the following is a mineral?<br> coal<br> ling<br> glass<br> brick<br> salt
    5·2 answers
  • C5H12, pentane, is a liquid at room temperature.
    9·1 answer
  • Help plz:)))I’ll mark u Brainliest
    12·1 answer
  • You are given a colourless solution, it turned blue litmus paper red​
    5·1 answer
  • Which form of energy changes in chemical reactions due to bonds breaking and forming?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!