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Hunter-Best [27]
3 years ago
11

State the valency of Al in Al²03​

Chemistry
1 answer:
kirill [66]3 years ago
4 0

Answer:

hi

jhy

jj

Explanation:

uythi;ghto

ggh

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Help on science please!! Will bark brainliest!
jok3333 [9.3K]

Aphelion in miles =94290301

Perihelion in miles = 91200281

Explanation:

To convert km in mile we use the multiply the distance in km with 0.62, because there are 0.62 miles in 1 km.

Aphelion in miles = aphelion in km × 0.62

Aphelion in miles = 152081132 × 0.62

Aphelion in miles =94290301

Perihelion in miles = perihelion in km × 0.62

Perihelion in miles = 147097229 × 0.62

Perihelion in miles = 91200281

Learn more about:

conversion of units

brainly.com/question/5725710

brainly.com/question/5956394

#learnwithBrainly

7 0
3 years ago
How many molecules of oxygen are there in 1.00 dm3 of oxygen at standard pressure and a temperature of 273 K. Give your answer t
rewona [7]
  • Pressure=p=1atm
  • Temperature=T=273K.
  • V=1dm^3=1L

we need no of moles

\\ \tt\hookrightarrow PV=nRT

\\ \tt\hookrightarrow n=\dfrac{PV}{RT}

\\ \tt\hookrightarrow n=\dfrac{1}{273(8.314)}

\\ \tt\hookrightarrow n=1/2269.7=0.0004mol

No of molecules=No of moles×Avagadro no

\\ \tt\hookrightarrow 0.0004(6.023\times 10^{23})

\\ \tt\hookrightarrow 2.4\times 10^{20} molecules

5 0
2 years ago
Read 2 more answers
Which state of matter does lightning represent?<br><br><br> Solid<br> Liquid<br> Gas<br> Plasma
andrey2020 [161]
<h2>Answer:</h2>

Plasma

<h2>Explanation:</h2>

Plasma is the stuff of lightning, flame and stars. Plasma is neither solid, liquid nor gas plasma is a fourth state of matter.

Plasma is when the electrons are "freed" from their host atoms for a short time, due to high temperatures. Fire is plasma, it responds to electric fields. Lightning is also plasma.

4 0
3 years ago
Which answer choice describes the noble gases?​
Svetradugi [14.3K]

Answer:

18...

HE

NE

AR

KR

XE

RN

OG....................

3 0
3 years ago
What is the percent by mass of magnesium sulfate in MgSO4 · 7H2O?
AfilCa [17]
ANSWER - 48.83%

Mg - 24.31
S - 32.07
O - 16x4 - 64
ADD ALL TOGETHER = 120.38

H - 1.01x2 - 2.02
O - 16
TOTAL = 18.02x7 = 126.14

ADD 120.38 to 126.14 = 246.52
last part divide MgSO4 by total compound mass 
120.38/246.52 then multiply by 100 = 48.831
7 0
3 years ago
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