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AleksandrR [38]
3 years ago
8

Which of the following is an example of a chemical change?

Chemistry
1 answer:
ad-work [718]3 years ago
8 0

Answer:

burning a paper is chemical change

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In an experiment, the molar mass of the compound was determined to be 118.084 g/mol. What is the molecular formula of the compou
pishuonlain [190]

Answer:

Succinic acid

Explanation:

The most common possibility is succinic acid

As it has decimals after whole no till hundredth it contains OH and C in most of the cases .

Let's check for succinic acid

  • C4H_6O_6
  • 4(12)+4(16)+6
  • 64+48+6
  • 118u

Yes approximately equal

Molecular formula is.

(CH_2)_2(CO_2H)_2

3 0
2 years ago
if 0.582 moles of zinc reacts with excess lead(IV) sulfate how many grams are zinc sulfate would be produced? can someone help m
love history [14]
Balanced equation:
Pb(SO₄)₂ + 2 Zn → 2 ZnSO₄ + Pb
From the equation we found that 2 moles of Zn form 2 moles of ZnSO₄ 
so 0.582 mole of Zn will produce 0.582 ZnSO₄
Molar mass of ZnSO₄ = 161.47 g/mole
Mass of ZnSO₄ formed = 161.47 x 0.582 = 94.0 grams 
7 0
3 years ago
4. How many moles are in 9.12 x 1023 molecules of sugar? And I want the steps to so that I can understand better
Aleksandr-060686 [28]

Answer:

Step 1: List the known quantities and plan the problem.

Known

number of C atoms = 4.72 × 10 24

1 mole = 6.02 × 10 23 atoms

Unknown

4.72 × 10 24 = ? mol C

One conversion factor will allow us to convert from the number of C atoms to moles of C atoms.

Step 2: Calculate.

 

4.72 times 10^{24} text{atoms C} times frac{1  text{mol C}}{6.02 times 10^{23} text{atoms C}}=7.84  text{mol C}

Step 3: Think about your result.

The given number of carbon atoms was greater than Avogadro’s number, so the number of moles of C atoms is greater than 1 mole.  Since Avogadro’s number is a measured quantity with three significant figures, the result of the calculation is rounded to three significant figures.

Explanation:

the image is 4 step2 mwa

7 0
3 years ago
Atoms have kinetic energy because they are always ______.
Ksivusya [100]

Answer:

Exploding

Explanation:

(hope it helps you)

Edit: sorry Im pretty sure its vibrating and because they vibrate which is why it has kinetic energy

7 0
3 years ago
Read 2 more answers
Using Le Châtelier’s Principle, explain why people suffering from carbon monoxide poisoning are given pure oxygen to breathe in
Bas_tet [7]

Answer:

See explanation

Explanation:

Carbon monoxide is toxic because it can successfully competes with oxygen for hemoglobin (Hb) sites according to the following equilibrium:

Hb(O₂)₄(aq) + 4CO(g) ⇄ Hb(CO)₄(aq) + 4O₂(g)

Based on LeChatelier’s Principle, CO poisoning can be reversed by applying O₂(g) to victim. This addition of O₂(g) increases system concentration of O₂(g) in the equilibrium reaction thereby overloading the product side of the equilibrium forcing it to shift to the left, decomposing the  carboxyhemoglobin (Hb(CO)₄) and releasing the CO(g) and combining with O₂(g) to form more Hb(O₂)₄.  

7 0
3 years ago
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