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Anit [1.1K]
3 years ago
9

Balance the following equation? Al + O2 - - - - - -) Al2O3 ​

Chemistry
1 answer:
xz_007 [3.2K]3 years ago
8 0

Answer:

4Al (s) + 3O₂ (g) → 2Al₂O₃

General Formulas and Concepts:

<u>Chemistry - Reactions</u>

  • Reaction Prediction
  • Balancing RxN's

Explanation:

<u>Step 1: Define RxN</u>

Al (s) + O₂ (g) → Al₂O₃

<u>Step 2: Balance RxN</u>

4Al (s) + 3O₂ (g) → 2Al₂O₃

  • Need to balance the amount of oxygens on both sides
  • If we balance the oxygens, the aluminums will also have to be rebalanced
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Is Pluto still a planet ? Explain your answer .
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Hey!


According to scientists across the globe, Pluto is not a "planet", but a "dwarf planet." This also is determined when you were born and taught different ideals, cause everyone changed their sort of learning on planets overtime in our generation. Hope this helped!

8 0
3 years ago
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Calvin is practicing for a golf tournament. His normal driver distance is 250 yards. He hits three balls with his driver, and th
Oduvanchick [21]

Answer:

This question is incomplete as it lacks options; the options are:

A. His drives are both accurate and precise

B. His drives are precise but not accurate

C. His drives are accurate but not precise

D. His drives are neither accurate nor precise

The correct answer is B. His drives are precise but not accurate

Explanation:

The accuracy of a measurement refers to how close those measurements are to a true or accepted value. Note that, in this case, the normal driver distance of 250 yards is the TRUE OR ACCEPTED VALUE. Observing the three measured values for the driver's distance; 270 yards, 273 yards, and 269 yards, one would notice that these values are far apart from the true value of 250yards. Hence, these measurements are NOT ACCURATE.

On the other hand, PRECISION refers to how close measurements are to one another. In this case, 270yards, 273 yards, 269 yards are close to one another, hence that are said to be PRECISE.

Therefore, according to the measurements, it can be said that HIS DRIVES ARE PRECISE BUT NOT ACCURATE

3 0
3 years ago
What is the best description of how heat is transferred from deep in the earth to the surface?
Lana71 [14]

Answer:

pretty sure it's C,

Explanation:

Mantle convection is the very slow creeping motion of Earth's solid silicate mantle caused by convection currents carrying heat from the interior to the planet's surface. ... This hot added material cools down by conduction and convection of heat.

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3 years ago
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Arrange the following elements in order from lowest to highest first ionization energy : AI , Ar, Cs, Na .
denis-greek [22]

Answer:francium

The first ionization energy varies in a predictable way across the periodic table. The ionization energy decreases from top to bottom in groups, and increases from left to right across a period. Thus, helium has the largest first ionization energy, while francium has one of the lowest.

Explanation:

6 0
3 years ago
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A chemist has a 12.5 liter sample of neon gas at 1.00 atm and 30 c. If the chemist compresses the sample to 10.5 liters and hold
ycow [4]

Answer:

254.5 K

Explanation:

Data Given

initial volume V1 of neon gas = 12.5 L

final Volume V2 of neon gas = 10.5 L

initial Temperature T1 of neon gas = 30 °C

convert Temperature to Kelvin

T1 = °C +273

T1 = 30°C + 273 = 303 K

final Temperature T2 of neon gas = ?

Solution:

This problem will be solved by using Charles' law equation at constant pressure.

The formula used

                        V1 / T1 = V2 / T2

As we have to find out Temperature, so rearrange the above equation

                       T2 = V2 x T1 / V1

Put value from the data given

T2 = 10.5 L x 303 K / 12.5 L

T2 = 254.5K

So the final Temperature of neon gas = 254.5 K

8 0
3 years ago
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