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Lady bird [3.3K]
3 years ago
6

Ght

Chemistry
1 answer:
Murljashka [212]3 years ago
4 0

Answer 78

Explanation:

omg long

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Who uses holmium? I need to know for a science project.
Tanzania [10]

Answer:

Holmium can absorb neutrons, so it is used in nuclear reactors to keep a chain reaction under control. Its alloys are used in some magnets. Holmium has no known biological role, and is non-toxic. Holmium is found as a minor component of the minerals monazite and bastnaesite.

Explanation:

this is basically used in industries

7 0
3 years ago
List the following units in order from largest to smallest: m3, mL, cL, uL, L, dL?
Novay_Z [31]
Below are the order of the units from largest to the smallest:<span>

m^3 = meters and is 1 meter^3 is equal to 1000 liters
L = Liters and 1 liter is equal to 10 deciliter
dL = decilter, 1 deciliter is equal to 10 centiliter 
cL = centiliter, 1 centiliter is equal to 10 mililiter
mL = mililiter, 1 militer is equal to </span><span>1000.000 µl</span> 
µl = micorlitre
5 0
3 years ago
The combustion reaction of isopropyl alcohol is given below: C 3 H 7 O H ( l ) + 9 2 O 2 ( g ) → 3 C O 2 ( g ) + 4 H 2 O ( g ) T
jek_recluse [69]

Answer:

the heat of formation of isopropyl alcohol is -317.82 kJ/mol

Explanation:

The heat of combustion of isopropyl alcohol is given as follows;

C₃H₇OH (l) +(9/2)O₂ → 3CO₂(g) + 4H₂O (g)

The heat of combustion of CO₂ and H₂O are given as follows

C (s) + O₂ (g) → CO₂(g) = −393.50 kJ

H₂ (g) + 1/2·O₂(g)   →  H₂O (l) = −285.83 kJ

Therefore we have

3CO₂(g) + 4H₂O (g) → C₃H₇OH (l) +(9/2)O₂ which we can write as

3C (s) + 3O₂ (g) → 3CO₂(g) = −393.50 kJ × 3  =

4H₂ (g) + 2·O₂(g)   →  4H₂O (l) = −285.83 kJ × 4

3CO₂(g) + 4H₂O (g) → C₃H₇OH (l) +(9/2)O₂ = +2006 kJ/mol

-1180.5 - 1143.32 +2006 = -317.82 kJ/mol

Therefore, the heat of formation of isopropyl alcohol = -317.82 kJ/mol.

3 0
3 years ago
What happened as a result of people being able to trade and purchase food from other people?
Rashid [163]

D.There were large food shortages.

As a result of people being able to trade and purchase food from other people.

Explanation:

  • From the following options, The people who were able to trad and purchase food from other people could be because of large food shortages.
  • People started buying from each other to fulfill their basic food necessities.
  • There is also a possibility where people have more stock to be sold.
7 0
3 years ago
Which compound has both ionic and covalent bonding?
Zielflug [23.3K]
(1) CaCO3 is the correct answer.

The type of bond formed between Ca2+ and CO3 2- is ionic, and the type of bond formed between C and O is covalent.

Hope this helps~
6 0
3 years ago
Read 2 more answers
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