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3 years ago

Please Help Me! Check if my answer is correct and if not can you please explain the correct answer

Chemistry

1 answer:

Svetlanka [38]3 years ago

7 0

Your answer is not correct.

Correct Answer: 4Fe + 3O2 ——> 2Fe2O3

This is the correct answer because you need equal Iron(Fe) on both sides. Since you already have 2 Irons on the products(right side) side you need 2 on the reactants(left side) side, so you add a 2. For Oxygen(O) since you already have 3 on the products(right) side and only 2 on the reactants(left) side you need to balance those and make them both 6 so you multiply by 2 on the products(right) side and multiply by 3 on the reactants(left) side. Since you can’t add a coefficient to only one element you need to add a 2 to both elements on the product side. So that gets you 4 Iron and 6 Oxygen. On the reactants side you only have 1 Iron and 2 Oxygen. We balance this equation by multiplying by 4 for Iron on the reactants side and multiplying by 3 for Oxygen on the reactants side. So this gets you 4Fe + 3O2 —> 2Fe2O3
I hope this helped!!

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Describe three devices used in radiation detection

xeze [42]

MicroR Meter, with Sodium Iodide Detector
Geiger Counter, with Geiger-Mueller (GM) Tube or Probe
Portable Multichannel Analyzer

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3 years ago

What is the volume mL of 2 degree celsius?

Anestetic [448]

Answer:

Question not very specific, but here is an answer you might be looking for. Density of object at 2 degrees C, 0.99997 g/mL. Hope it IS the answer you are looking for!

Explanation:

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3 years ago

Name the following covalent compound:

mote1985 [20]

Answer:

Pentasulfur nonanitride.

Explanation:

In order to name a compound properly, we need to identify the type of a compound we have. The given compound consists of two non-metals, sulfur and nitrogen. This implies that we have a covalent compound in contrast to an ionic compound which consists of a metal and a non-metal.

To name a molecular/covalent compound, we should use prefixes stating the number of atoms we have. In this case, we have 5 sulfur atoms. The prefix for 5 is 'penta'. That said, we have 'pentasulfur' as our beginning of the name.

We also have 9 nitrogen atoms. The second atom in the molecular formula would have an ending of '-ide', so we expect to have 'nitride'. Adding a prefix for 9, we'd have 'nonanitride'.

Putting everything together, the name is pentasulfur nonanitride.

Some common prefixes:

mono – one (we don't state mono for the first atom, e. g., we would name CO as carbon monoxide instead of monocarbon monoxide);

di – two;

tri – three;

tetra – four;

penta – five;

hexa – six;

hepta – seven;

octa – eight;

nona – nine;

deca – ten.

Notice that 'decanitride' would be correct in case you had 10 nitrogen atoms, similarly, tetra and hexa stand for 4 and 6 instead of 5 given sulfur atoms.

6 0

3 years ago

How long must $542 be invested at a rate of 7% to earn $303.52 in interest

yulyashka [42]

The number of years that must be invested at a rate of 7 % to earn$ 303.52 in interest is

8 years

calculation

by use of the formula A = P (1+ rt)
where : A is the final amount = 542 + 303.52 =$ 845.52

P is the principal money to be invested = $ 542

r= rate= 7/100=0.07

t= time required

=$ 845.52=$ 542( 1+ 0.07 t)

open the bracket
= $845.53= $542 + $37.94 t

like terms together

=$ 845.53 -$542 = $37.94 t

=$303.52 =$37.94 t

divide both side by $37.94

= $303.52/ $ 37.94 = $37.94t/$37.94

t= 8 years

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3 years ago

A hypothetical element x has 3 naturally occurring isotopes: 41.20% of 21x, with an atomic weight of 21.016 amu, 50.12% of 22x,

iogann1982 [59]

The average atomic weight is calculated by adding up the products of the percentage abundance and atomic weight. In this item, we have the equation,

A = (0.412)(21.016 amu) + (0.5012)(21.942 amu) + (0.0868)(23.974 amu)

Simplifying the operation will give us the answer of 21.74 amu.

Answer: 21.74 amu

4 0

3 years ago