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
Kay [80]
3 years ago
7

What mass of ammonium thiocyanate must be used if it is to react completely with 6.5 g barium hydroxide octahydrate?

Chemistry
1 answer:
Molodets [167]3 years ago
6 0
<span>The reaction equation is:
Ba(OH)</span>₂<span>*8H</span>₂<span>O + 2NH</span>₄<span>SCN(s) </span>→<span> Ba(SCN)</span>₂<span>(s) + 10H</span>₂<span>O(l) + 2NH</span>₃<span> (g)

The molecular mass of barium hydroxide octahydrate is 315 grams /mol.
We determine the number of moles of barium hydroxide octahydrate:
moles = mass / Mr
moles = 6.5 / 315
moles = 0.02 mol

Using the equation, we can determine that the moles of ammonium thiocyanate required are:
2 * 0.02 = 0.04 mol

The molecular weight of ammonium thiocyanate is 76.1 grams / mol

Weight = moles * Mr
Weight = 0.04 * 76.1
Weight = 3.04 grams


3.04 grams of ammonium thicyanate are required.</span>
You might be interested in
what kind of change occurs when sodium and chlorine combine ? Describe the matter before and after the change
DaniilM [7]
Sodium is a silver-colored metal which is soft enough to cut with a knife. It is an extremely reactive metal, and is always found naturally in ionic compounds, not in its pure metallic form. Pure sodium metal reacts violently (and sometimes explosively) with water, producing sodium hydroxide, hydrogen gas, and heat:


Chlorine is a poisonous, yellow-green gas, with a very sharp odor, a

Chemical change happen cuz these 2 elements will combine to form a new compound which’s NaCl ( table salt )
5 0
3 years ago
a patient is to receive 25 mg of methimazole, a drug used to treat hyperthyroid conditions. the drug is dissolved in solution co
Rainbow [258]
The drug has a concentration of 6 mg per 1 ml. Therefore, to know that number of ml containing 25 grams, we will simply do cross multiplication as follows:
amount of drug = (25 x 1) / 6 = 4.1667 ml

Therefore, for the patient to receive 25 mg of methimazole, he/she should take 4.1667 ml of the drug solution.
8 0
2 years ago
The proteins of all living things require<br> geometry of amino acids.
Dmitry [639]

As the building blocks of proteins , amino acids are linked to almost every life process, but they also have key roles as precursor compounds in many physiological processes.

8 0
3 years ago
Read 2 more answers
How did uranium become present in Earth's upper crust? Choose one: A. It was delivered by comets that crashed into Earth's surfa
Luda [366]

Answer:

<em>Option A. It was delivered by comets that crashed into Earth's surface.</em>

Explanation:        

<em><u>Uranium (U) is a chemical element with atomic number 92.</u></em>        

<em />

<em>For many years, a large number of scientists have been studying the abundance and origin of the isotopes of uranium in Earth</em>. <u>According to some theories, the Earth's uranium was produced in one or more supernovae</u> (an explosive brightening of a star), in wich, the main process consists in the rapid capture of neutrons by seed nuclei at great rates. <u>Another theory proposes that uranium is created during the merger of two neutron stars</u> (neutron stars are very dense), because, when such dense bodies come closer together the gravitational force cause them to merge, producing huge amounts of hevy metals like uranium.                  

<u><em>Many analyses have been made of the uranium in rocks of the Earth. These measurements shows that the abundance of uranium is bigger in the crust and upper mantle of the Earth</em></u>.    

So, knowing that Earth's uranium was produced through one of these processes, <u><em>the best answer is option A, the uranium was delivered by comets that crashed into Earth's surface.</em></u>    

Have a nice day!                            

5 0
3 years ago
Which animal resembles their parents already after being born or hatched?
nikitadnepr [17]
I think maybe reptiles bu i could be wrong. :)
7 0
2 years ago
Other questions:
  • When matter heats up, dose the molecules close together?
    7·2 answers
  • How many miles of NaCl are in 250 mL of a 0.4 M solution?​
    6·1 answer
  • I need help asaaaaap
    10·1 answer
  • I need help finding this out
    6·1 answer
  • Which statement must be true when solution equilibrium occurs?
    11·2 answers
  • Charlie measures the mass of a metal three times and recorded 8.83 g,
    12·1 answer
  • If the density of ocean water at a depth of 1.00 x 104 m is 1.071 g/mL and if 26.0 g of water at that depth contains 182mg of po
    11·2 answers
  • Which climate prevails in the northwest coast of the United States?
    11·2 answers
  • Como transformar -80°K a °C​
    8·1 answer
  • What ion is formed When a atom Of mercury (hg) Loses two electron
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!