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hoa [83]
3 years ago
6

What is the number of protons for the following? 190 +2 Os 76

Chemistry
2 answers:
Sidana [21]3 years ago
5 0

Answer: they are right

Explanation:

ikadub [295]3 years ago
3 0

Answer:

190+2=192

Explanation:

192 add it 192 added

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when the orbitals or energy levels of an atom are full, it is considered to be stable. which atom in the ground state has a stab
Sonbull [250]

Answer:

Noble gases, atoms which have complete filled outer orbits.

Explanation:

SInce, you have given no options elements like Neon, Helium,etc

7 0
3 years ago
What is the mass of 975 mL of mercury? Its density is 13.5 g/mL
miss Akunina [59]

Answer:

72.22 g

Explanation:

975 mL Mercury× 13.5 g/mL = 72.22 g

7 0
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ccording to all known laws of aviation, there is no way a bee should be able to fly. Its wings are too small to get its fat litt
drek231 [11]

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3 years ago
g modenr vacuum pumps make it easy to attain pressures of the order of in the laboratory. at a preasusure of 6.75 atm and an ord
Ratling [72]

Answer:

Number of molecules = 1.8267×10^20

Explanation:

From the question, we can deuced that the gases behave ideally, the we can make use of the ideal gas equation, which is expressed below;

PV = nRT

where

P =pressure

V =volume

n = the number of moles

R is the gas constant equal to 0.0821 L·atm/mol·K

T is the absolute temperature

Given:

P = 6.75 atm;

T = 290.0 k,

; V = 1.07 cm³ = 0.001 L

( 6.75 atm)(0.00107 L) = n(0.0821 L·atm/mol·K)(290K)

n = 3.0335167*10^-4 moles

But there are 6.022×10²³ molecules in 1 mole,

Number of molecules = 1.8267×10^20

7 0
3 years ago
How can you overcome drawback of a chemaicl equation ? any three​
Shtirlitz [24]

Answer:

1.rate of reaction should be indicated by symbols 2.we should indicate physical states by sybloms 3.reversible reaction should be indicated by using double arrows

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3 years ago
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