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creativ13 [48]
3 years ago
9

What does the line with “alternating spikes and semicircles” mean?

Chemistry
1 answer:
Usimov [2.4K]3 years ago
8 0

Answer:

The line with spikes and semicircles is a stationary front, it brings days of steady rain.

Explanation:

L means Low pressure, it brings stormy weather with strong winds.

H means High pressure, it brings fair weather and light winds.

The line with spikes is a cold weather front, it brings thunderstorms and colder

temperatures.

The line with spikes and semicircles is a stationary front, it brings days of steady rain.

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A compressed gas cylinder ar 135 atm and 23°C is in a room wheree a fire occurs the fire raises the temperature of the gas to 47
yan [13]

Answer: 341.15atm

Explanation:Please see attachment for explanation

7 0
3 years ago
How many grams of beryllium chloride will be consumed if 987.5 g of magnesium chloride is produced?
Savatey [412]
The  number   Beryllium  chloride  consumed  is  calculated  as  follows

write  equation  for    reaction

that  is  BeCl2  + Mg  ----->  MgCl2  +Be

find  the  moles  of   MgCl2  produced

moles  =mass/molar  mass  of  MgCl2

=  987.5g/95 =  10.39 moles
by   use  of  mole  ratio  between   BeCl2  to  Mgcl2  which  1:1  therefore  the  moles  of  BeCl2  is  also   10.39moles

mass  of  BeCl2  =  moles  x  molar  mass

that  is  10.39  x80  =  831.2
8 0
3 years ago
Upon combustion, a 0.8376 g sample of a compound containing only carbon, hydrogen, and oxygen produces 1.6003 gco2 and 0.9827 gh
Wewaii [24]
Answer is: empirical formula for compound is C₂H₆O.
m(CO₂) = 1,6003 g.
n(CO₂) = m(CO₂) ÷ M(CO₂).
n(CO₂) = 1,6003 g ÷ 44 g/mol.
n(CO₂) = 0,0364 mol.
n(CO₂) = n(C).
m(C) = 0,0364 mol · 12 g/mol = 0,4368 g.
m(H₂O) = 0,9827 g.
n(H₂O) = 0,9827 g ÷ 18 g/mol.
n(H₂O) = 0,0546 mol.
n(H) = 2 · n(H₂O) = 0,1092 mol.
m(H) = 0,1092 mol · 1 g/mol = 0,1092 g.
m(O) = 0,8376 g - 0,4368 g - 0,1092 g = 0,2916 g.
n(O) = 0,2916 g ÷ 16 g/mol = 0,0182 mol.
n(C) : n(H) : n(O) = 0,0364 mol : 0,1092 mol : 0,0182 mol.
n(C) : n(H) : n(O) = 2 : 6 : 1.
7 0
4 years ago
What is the wavelength of the line corresponding to n=4 in the balmer series? express your answer in nanometers to three signifi
liq [111]
Expression for the Balmer series to find the wavelength of the spectral line is as follows:
1 / λ = R (\frac{1}{2^{2} } -  \frac{1}{ n^{2}} )
Where, λ is wavelength, R is Rydberg constant, and n is integral value (4 here →  Fourth level) 
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λ = 4.86 x 10⁻⁷ m 
since 1 m = 10⁹ nm
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8 0
3 years ago
Which of these changes occurs during a nuclear change?
Andrews [41]
The correct answer is D. Elements are created that differ from the reactants.. Because in a eeaction, the product is different than the reactants. Take NaCl for example.
7 0
3 years ago
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