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salantis [7]
3 years ago
6

2.5 gm of a sample of Nahco3 when strongly.

Chemistry
1 answer:
mr_godi [17]3 years ago
3 0

Answer:

Sry but i hope u will get the right answer and have a great christmas only 3 more days!

Explanation:

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Which of these is used to find the estimated age range of a fossil?
Maksim231197 [3]

Answer:

Carbon-14

Explanation:

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3 years ago
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The compound CaSO4 ionizes into a calcium ion and a sulfate ion (SO4). Calcium has two electrons in its outer shell. Upon ioniza
gtnhenbr [62]

Answer:

-2

Explanation:

Calcium is the element of second group and forth period. The electronic configuration of Calcium is - 2, 8, 8, 2 or 1s^22s^22p^63s^23p^64s^2

There are 2 valence electrons of Calcium.

Thus, calcium loses two electrons to sulfate ion and sulfate ion accepts these electrons to form ionic bond.

Calcium sulfate, CaSO_4 is formed when 2 valence electrons of calcium are loosed and they are gained by sulfate ion.

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6 0
3 years ago
How many number of oxygen molecules are required to produce 0.22 g of CO2 according to the reaction?
zmey [24]
The number of moles for co2=mass(g)/molar mass
n=.22/44=.005 mole of CO2
from the equation we see the relationship between the moles of co2 and O2 and we find that they have the same number of moles
So we need .005mole of O2
Multiple the number of moles with avogadro’s number to know the number of O2molecules
.005x6.022 x10^23
3 0
3 years ago
What happens to the food dye in hot water?
hoa [83]

Answer:

The food coloring mixes through the hot water faster than it mixes with the cold water.

Explanation:

Pretty cool tbh lol, hope this helps!

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3 years ago
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100 m = 0.1 km
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Can you mark it brainliest?
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2 years ago
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