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
svet-max [94.6K]
3 years ago
5

Help pleaseeeeeeeee!

Chemistry
1 answer:
VMariaS [17]3 years ago
3 0
Middle one because otherwise the substance wouldn’t be a compound
You might be interested in
A 2.36-gram sample of NaHCO3 was completely decomposed in an experiment.
enyata [817]

Answer:

Explanation:

a) The mass of the reactants is 2.36 grams, and the mass of the products is 1.57 grams plus the mass of the carbonic acid. Thus, using the law of conservation of mass, we get the mass of the carbonic acid is 2.36 - 1.57 =  0.79 grams.

b) The gram-formula mass of sodium bicarbonate is 84.006 g/mol, meaning that 2.36/84.006 = 0.028 moles were consumed. Thus, this means that in theory, 0.014 moles of carbonic acid should have been produced, which would have a mass of (0.014)(62.024)=0.868 grams. Thus, the percentage yield is (0.79)/(0.868) * 100 = 91%

8 0
2 years ago
How many grams of mercury are needed to react completely with 157g of sulfur to form hgs?
Salsk061 [2.6K]
<span>To solve this we need to balance the equations first.
 So Hg + S --> HgS is balanced
 One mole of Hg requires one mole of S to form one mole of HgS.
 Number of moles of Sulphur = mass/ molar mass = 157/32 = 4.906
So 4.90 moles of S reacts with 4.90 moles of Hg.
Hence there are 4.90 moles of 4.90 of Hg.
 Mass = number of moles * molar mass of Hg
Mass = 4.906 * 200.59 = 982.891g</span>
8 0
3 years ago
Read 2 more answers
What were some of the “old” ideas that Isaac Newton learned in school?
Scilla [17]

Answer:

In addition to mathematics, physics and astronomy, Newton also had an interest in alchemy, mysticism, and theology.

4 0
2 years ago
Read 2 more answers
A blank is a condition that strays from normal homeostasis.
AURORKA [14]

homeostatic imbalance is the answer, because it's when the internal environment cannot remain in equilibrium.

8 0
3 years ago
Why is bronze considered an alloy?
Serggg [28]
Option B, Bronze is made of the metals copper and tin.

Alloys are essentially materials that consist of two or more metal elements.

-T.B.
3 0
3 years ago
Read 2 more answers
Other questions:
  • The equilibrium constant for A + 2B → 3C is 2.1 * 10^-6
    15·1 answer
  • 2.00 L of 0.500 M H2SO4 (density = 1.030 g/mL) at 25.000°C is mixed with 200. g of a NaOH solution, also at 25.000°C. After stir
    15·1 answer
  • Which statement is true?
    9·2 answers
  • If 225 grams of propane are burned in the presence of 125 grams of oxygen, how many grams of water should be expected?
    11·1 answer
  • A scientist analyzes four samples of compounds. He finds the first compound contains 10 grams of sodium, 211 grams of potassium,
    9·1 answer
  • Which explains the basis of the Biuret test? a. Under base conditions, copper ions bind to the amino groups of proteins and chan
    7·2 answers
  • What happens in the artificial transmutation of an element? Include an example.
    15·1 answer
  • To evaluate R. the volume of a gas measured in the temperature of the gas is measured in<br> while
    9·2 answers
  • Emma constructed a simple motor. When connected correctly, the coil of copper wire spins. Which of the following best describes
    8·1 answer
  • Which chemical process generates the atp produced in glycolysis?.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!