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GaryK [48]
3 years ago
8

Help please ASAP I’ll mark you as brainlister

Chemistry
1 answer:
noname [10]3 years ago
8 0

Answer: FeO is called ferrous oxide while Fe2O3 is ferric oxide

Explanation:

Ferrous oxide, commonly known as iron(II) oxide contains iron that lost 2 elections in the oxidation process. So it is able to bond with other atoms that have an extra 2 electrons to share. Ferric oxide, is commonly known as iron(III) oxide

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WILL MARK BRAINLIEST FOR THE BEST ANSWER~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
adelina 88 [10]
There are 1,000 milligrams (mg) in one gram:
In 10 grams, there are 10 x 1,000 = 10,000 milligrams. This is a lethal dose of caffeine.

There are 4.05 mg/oz (milligrams/ounce) of caffeine in the soda. 
In a 12 ounce can, there are 4.05 x 12 = 48.6 milligrams.

How many sodas would it take to kill you?
To find this, we divide the lethal dose amount (10,000 mg) by the amount of caffeine per can (48.6 mg).
10,000 ÷ 48.6 = 205.76. 

Since 205 cans is not quite 10,000 mg, technically it would take 206 cans of soda to consume a lethal dose of caffeine. 
7 0
3 years ago
9. The formular for finding the area
sukhopar [10]

Answer:

D. length × width

Explanation:

eg. 30 cm(length) × 20cm(width) = 600cm²

4 0
3 years ago
How many unique 13C NMR signals exist in the spectrum for the following compound?
yawa3891 [41]

Answer:

                   Five signals exist in the spectrum of 4-methylpent-1-ene.

Explanation:

                   Nuclear Magnetic Resonance (NMR) is the main technique used by Scientists particularly by Chemists to elucidate the structure of compounds mainly organic compounds.

                   There are different NMR techniques which are used to characterize different NMR active nuclei like ¹H-NMR, ¹³C-NMR, ¹⁵N-NMR, ¹⁹F-NMR e.t.c.

                   In given case the compound will show five different signal for six carbon atoms. THis is because among the six carbon atoms two of them have same electronic environment means they are having same electron surrounding thus, they will share a signal at same ppm. Hence, the signals and each signal shown by each carbon atom is shown below.

6 0
3 years ago
Empirical formula for S3O9
Vsevolod [243]

Answer:

* The empirical formula of a compound shows the ratio of elements present in a compound

* The molecular formula of a compound shows how many atoms of each element are present in a molecule of a compound.

Example: the compound butene has a molecular formula of C4H8. The empirical formula

of butene is CH2 because there is a 1:2 ratio of carbon atoms to hydrogen atoms.

7 0
3 years ago
Calculate the enthalpy change for the melting of a 25.0g ice cube
joja [24]
Enthalpy change = mass * specific heat capacity * temperature change

Mass is 25.0 (given)
Specific heat capacity is 2.108 (checked online)
Temperature change : none
So input these into the equation :

25.0 * 2.108 = 52.7
7 0
3 years ago
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