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Rzqust [24]
3 years ago
12

How many magnesiums are in 2mg2 O3

Chemistry
1 answer:
Doss [256]3 years ago
7 0
There are two magnesium molecules or 4 atoms
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Bismuth has a density of 9.80 g/cm^ 3 . What is the of 3.74 cm ^ 3 of Bi?
Ierofanga [76]

Explanation:

density = mass/ volume

mass= density × volume

mass= 9.80× 3.74

mass= 36.652 g

3 0
3 years ago
If the density of mercury is 13.6 g/cm3, what is mercury’s specific gravity?
Oxana [17]
Density always tells you the mass of exactly one unit of volume of a given substance.The answer is 68 g
7 0
3 years ago
How many lead atoms in Pb(OH) 4 ?
OlgaM077 [116]

4 in hydrogen 4 in oxygen

Explanation:

hope this helps

5 0
3 years ago
physics During exercise, a person may give off 753,480 J of heat in 30 minutes by evaporation of water from the skin. How much w
Tju [1.3M]

Answer : The amount of water lost was, 333.4 grams.

Explanation : Given,

Heat released = 753480 J

Formula used :

Q=mL

where,

Q = heat released  = 753480 J

m = mass  = ?

L = latent heat vaporization of water = 2260J/g

Now put all the given values in the above formula, we get:

753480J=m\times (2260J/g)

m=333.4g

Thus, the amount of water lost was, 333.4 grams.

8 0
3 years ago
If the acetylene tank contains 37.0 mol of C2H2 and the oxygen tank contains 81.0 mol of O2, what is the limiting reactant for t
bekas [8.4K]

Answer: O_2 is considered as the limiting reagent for this reaction.

Explanation:

Limiting reagent is the reagent which limits the formation of the product.

Excess reagent is the reagent which is present in excess in a chemical reaction.

For the combustion of acetylene, the reaction follows:

2C_2H_2(g)+5O_2(g)\rightarrow 4CO_2+2H_2O

By Stoichiometry,

5 moles of oxygen gas reacts with 2 moles of acetylene.

So, 81 moles of oxygen gas will react with = \frac{2}{5}\times 81 = 32.4 moles of acetylene.

As, the required amount of acetylene is less than the given amount. So, it is considered as an excess reagent and oxygen gas is the limiting reagent.

8 0
4 years ago
Read 2 more answers
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