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Ludmilka [50]
3 years ago
6

Calculate the mass of magnesium needed to make 25g of magnesium oxide​

Chemistry
1 answer:
puteri [66]3 years ago
6 0

Explanation:

here's the answer to your question about

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When balance the following chemical equations N2+O2= NO2 the coefficient for O2 is
Papessa [141]

Answer:

2

Explanation:

N₂ + O₂ --->  NO₂

balance

N₂ + 2O₂ ---> 2NO₂

4 0
3 years ago
6 NaOH + 2 Al --> 2 Na3AlO3 + 3 H2 If you start with 258 g of Al, how many moles of Na3AlO3 can you make?
tatyana61 [14]

Solution :

Assuming all Al will be consumed in the reaction.

From the given equation, 2 mole of Al produce 2 mole of Na_3AlO_3.

So, 1 mole of Al produce 1 mole of  Na_3AlO_3.     .....statement 1)

Number of moles of Al in 258 gram of Al.

n = \dfrac{mass}{molar\ mass}\\\\n = \dfrac{258}{27}\ moles\\\\n = 9.556 \ moles

Therefore, from statement 1) number of moles of Na_3AlO_3 produced is also 9.556 moles.

7 0
3 years ago
I need help with this
lys-0071 [83]

Answer:

Fossils are the some traces or portions of the animals or plants, buried and preserved from past in rocks, sediments or ice.

Explanation:

                                  Correct match  is as follows-

  1. Mold and cast fossils-  An organism is buried in sediment after it dies.The hard part of organism leave behind a empty space imprinted in the rock. Later sediments and minerals fill the space and harden to make the original copy of the organisms.
  2. Carbon film fossils- An organism buried in sediments gets squeezed and heated inside the earth , leaving behind a thin carbon outline of the organism on a rock.
  3. Amber fossil-  An organism covered in tree resin or tree sap , which then hardens with the body of the organisms preserved inside.
  4. Ice fossil- An organism dies in a cold place on earth , its body becomes frozen and covered in layers of ice . The hard and soft part of the body may be preserved.

3 0
3 years ago
DONT ANSWER IF YOU DONT KNOW PLSSSS ITS COSTING ME MY GRADES!
SpyIntel [72]

Answer: A

Explanation: it isn't surrounded by water or ice so that leaves A

5 0
4 years ago
Pls hellpppppp!!!!!!!!!!!!!!!!
sleet_krkn [62]

Answer:

what is it I don't see anything

3 0
2 years ago
Read 2 more answers
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