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jeka94
3 years ago
5

Which of an atom's electrons are involved in chemical reactions?

Chemistry
1 answer:
Nadya [2.5K]3 years ago
4 0

it’s C

i hope i help you but if not DO NOT FORGET STAY SAFE AT HOME

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24. Which of the following pairs of solutions produce a precipitate when combined? A) Fe(NO); and KCI B) NH4Cl and AgNO3 C) KOH
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2 years ago
Draw a sketch of a cross section of a graduated cylinder illustrating the proper method for reading the volume
vekshin1

Answer:

in reading volume - you read from the bottom of the meniscus, which is the curve formed from the liquid in the graduated cylinder. Most graduated cylinders are in ml, so measure in the most accurate reading.

Explanation:

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3 years ago
A chemist wishes to decrease the vapor pressure of a large volume of water. Which amount of solute will decrease it the most? (N
valentinak56 [21]

Answer:c

Explanation:

5 0
3 years ago
Read 2 more answers
How many liters of space are in 4.00x10^22 of O2 occupy at STP
irinina [24]

Answer:

V O2 = 1.623 L

Explanation:

  • 1 mol ≡ 6.022 E23 molecules

∴ molecules O2 = 4.00 E22 molecules

⇒ moles O2 = (4.00 E22 molecules O2)×(mol O2/6.022 E23 molecules)

⇒ moles O2 = 0.0664 moles

at STP:

∴ T = 25°C ≅ 298 K

∴ P = 1 atm

assuming ideal gas:

∴ V = RTn/P

⇒ V O2 = ((0.082 atm.L/K.mol)(298 K)(0.0664 mol))/( 1 atm)

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5 0
3 years ago
Match each of the following descriptions to thecorrect element listed
Slav-nsk [51]

Answer: Please see explanation for answer

Explanation:Matching the  descriptions to the correct element listed gives

Element Group Name Group No Metal/ Nonmetal/ Metalloid Description

Neon    Noble gases       18           Non metal Colorless, tasteless, and        odorless gas, unreactive, nonconductive.

Bromine      Halogens   17          Non metal Not found as a free element (uncombined) in nature, reddish-brown liquid that vaporizes readily at room temperature to a red gas with a strong disagreeable odor.

Beryllium       Alklaline earth metal  2    Metal  Silvery-white, ductile, malleable, conductive solid with a high melting point for this type of element

Platinum     Platimum group metals  10   Metal      Silvery white, relatively soft, low density, conductive solid that is not found as a free element in nature but commonly found combined in alloys with copper or nickel

Potassium   Alkali Metals   1   Metal  Soft, easily cut with a knife to expose a silvery surface that rapidly oxidizes in air; never found uncombined in nature

Silicon    Carbon family     1`4  Metalloid   Metallic luster and grayish solid, very common in rocks and gemstones such as amethyst and opal, semiconductor

Sulfur   Calcogens      16  Non metal  Pale yellow, odorless, brittle solid at room temperature, nonconductor

4 0
3 years ago
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