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
Korolek [52]
3 years ago
15

Please answer number 76,77 and 78.

Chemistry
1 answer:
mote1985 [20]3 years ago
3 0
76. The level of muddy water will decrease slightly if the model is left in a sunny location for several days because of Evaporation. The sun will vaporize the water found in the mud, turning it into it's gaseous state, which will then cause it to rise up and get stuck on the plastic wrap.

77. Precipitation  

78.The reason that the sediment in the muddy water will remain the same is because the Mud will never evaporate like the water will, and therefore it will remain at the bottom of the container. 

Hope that helps! 
You might be interested in
6
xxTIMURxx [149]

Answer:

a

Explanation:

5 0
3 years ago
Write the balanced equation for the oxidation of iron to iron (III) oxide. Will mark brainlest answer
Butoxors [25]

Start with the unbalanced chemical equation

<span>Fe(s)+O2(g)→Fe2O3(s)</span>

The idea behind balancing chemical equations is that the number of atoms an element has on the reactants' side must be equal to the number of atoms it has on the products' side.

These atoms will become a part of different compounds once the reaction is completed, but they must always be in equal numbers on both sides.

So, look at iron first. One atom reacts, but two are produced - notice the 2 subscript iron has in Fe2O3. This means you must double the number of atoms on the reactants' side to reach an equality.2

<span>Fe(s)+<span>O2(g)</span>→Fe2<span>O3(s)</span></span>

Now look at oxygen. Two atoms react, but three are produced. The trick here is to find a common multiple that will make the number of atoms equal on both sides.

The easiest way to do this is to multiply the atoms that react by 3, which will give you 6 oxygen atoms that react, and the atoms that are produced by 2 - this will get you 6 oxygen atoms produced.

<span>2Fe(s)+3<span>O2(g)</span>→2Fe2<span>O3(s)</span></span>

However, notice that the iron atoms are unbalanced again. You have 2 that react, but 4 that are produced → multiply the atoms that react by 2 again, which will give you

4<span>F<span>e<span>(s)</span></span>+3</span><span><span>O<span>2(g)</span></span>→2</span><span>F<span>e2</span><span>O<span>3<span>(s</span><span>

</span></span></span></span>

5 0
3 years ago
Calcium cyanamide, CaCN2, reacts with water to form calcium carbonate and ammonia. CaCN2(s)+3H2O(l)→CaCO3(s)+2NH3(g). How many g
Norma-Jean [14]

298 g of calcium carbonate CaCO₃

Explanation:

We have the following chemical reaction:

CaCN₂ (s) + 3 H₂O (l) → CaCO₃ (s)+ 2 NH₃ (g)

number of moles = mass / molar weight

number of moles of H₂O = 161 / 18 = 8.94 moles

Knowing the chemical reaction we devise the following reasoning:

if        3 moles of H₂O produces 1 mole of CaCO₃

then  8.94 moles of H₂O produces X moles of CaCO₃

X = (8.94 × 1) / 3 = 2.98 moles of CaCO₃

mass =  number of moles × molar weight

mass of CaCO₃ = 2.98 × 100 = 298 g

Learn more about:

number of moles

brainly.com/question/1445383

brainly.com/question/516702

#learnwithBrainly

7 0
3 years ago
How might an antioxidant prevent another element from gaining or losing an electron?
Maslowich

Answer:

An antioxidant helps in the mopping up and elimination of free radicals and a common example is Glutathione. Oxidation reactions Involves the transfer of electrons or addition of oxygen to a substance.

Antioxidants help in decreasing or prevention of the oxidation of the molecules due to free radicals being formed which causes damage in the cells of animals.

5 0
2 years ago
Using the metric "stairs" convert the following:
frosja888 [35]
Skuwel converter
Trust converter
Gear converter
Trigger converter

Hope it helps
6 0
2 years ago
Other questions:
  • In fruit flies white eyes are dominant and red eyes are recessive what is the genotype for a purebred fly with white eyes EE Ee
    5·2 answers
  • Why are ionic compounds electrically neutral
    13·1 answer
  • Match the following terms to their respective definitions:
    13·1 answer
  • How much stronger is methane than carbon dioxide as a greenhouse gas?
    6·1 answer
  • A 10.0g sample of H2O(l) at 23.0degrees C absorbs 209 joules of heat. What is the final temp of the H2O(l) sample? Explain.
    5·1 answer
  • What does it mean when there is a physical change?
    13·1 answer
  • NH, (aq) + H.,000
    8·1 answer
  • A car with a mass of 3,500lbs accelerates negatively from 35m/s to 8m/s in 8s. What is the
    14·1 answer
  • . Which of the following statements about noble gases is NOT true?
    8·2 answers
  • Which ion in each pair has greater charge density? Explain.<br> (c) Na⁻ or Cl⁻
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!