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hodyreva [135]
3 years ago
6

Please help i really don't wanna fail :(

Chemistry
2 answers:
sp2606 [1]3 years ago
7 0
Milligram, Decigram, Gram, Decagram, Kilogram


Milligram (0.001 gram), Decigram (0.1 gram), Gram (1 gram), Decagram (10 grams), Kilogram (1000 grams),


Hope that helps :)!
BlackZzzverrR [31]3 years ago
5 0

Answer:

Kilogram,Decagram,gram,decigram,miligram

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What would happen to the annual rates of limestone (CaCO3) precipitation in the ocean if the ocean water were to become much war
stiv31 [10]

Answer:

CaCO3 exoskeleton dissolves in acidic water

Explanation:

The increasing CO2 level makes the ocean water acidic and hence reduces the pH. In such acidic environment, marine organism that produce calcium carbonate shells or skeletons are negatively affected. Coral reefs and coralline algae abilities to produce skeleton also reduces.  

Calcium carbonate dissolves in acid. Thus, the more acidic the ocean water is the faster and easier it is to dissolve the exoskeleton and shell of marine organisms made up of calcium carbonate  

4 0
2 years ago
The Periodic Table is a
Semenov [28]
The answer to this is D.
4 0
2 years ago
If 23.17 g of beryllium (Be) reacts with water at standard temperature and pressure,
emmainna [20.7K]

Volume of H2 produced = 57.6576 L

<h3>Further explanation</h3>

Given

23.17 g Be

Required

Volume of H2

Solution

Reaction

Be(s)+H2O(g)→BeO(s)+H2(g)

mol Be :

= 23.17 g : 9 g/mol

= 2.574

From the equation, mol H2 : mol Be = 1 : 1, so mol H2 = 2.574

Volume H2(assumed at STP, 1 mol=22.4 L) :

= 2.574 x 22.4 L

= 57.6576 L

5 0
2 years ago
Please, What is the mass of oxygen in 72.0g of water? [ H= 1.0; O = 16.0]
yarga [219]
Convert 72g of water into moles of water using molecular weights.

So water is H2O so add up those molecular weights (H=1 and O=16)

2(1)+(16) = 18 g/mol

Then convert so 72g / (18 g/mol) = 4 mol

Now you can convert mol of water to mol of oxygen. So 4 mol of water is 4 mol of oxygen. Then use oxygen molecular weight to find grams again.

4 mol oxygen * 16 g/mol = 64g of oxygen

If we were doing hydrogen instead of oxygen there would be 8 mol hydrogen in 4 mol of water (2 H’s in every H2O molecule) and since we have 74 grams and oxygen is 64 grams, Hydrogen should be 8 grams. Math to check below

8 mol hydrogen * 1 g/mol = 8g of hydrogen

It all adds to 72 so we are correct.
5 0
3 years ago
when 5.60g of an iron oxide is heated with carbon, 3.92g of iron is produced. calculate the empirical formula of the iron oxide
svetlana [45]

Answer:  Fe2O3

Explanation:

  5.60 g Iron Oxide

-  3.92 g Iron

===========

=  1.68 g Oxygen

Convert Fe and O to moles:

3.92 g Iron/55.85 = 0.0702 moles Fe

1.68 g Oxygen/16 = 0.105 moles O

The ratio of O to Fe is 1.50.  There are 3/2 O for each Fe.  Multiply by 2 to get whole numbers:  2Fe for every 3O:  Fe2O3

5 0
2 years ago
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