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Flauer [41]
3 years ago
14

What would be the colour of litmus in sodium carbonate? will make brainliest

Chemistry
1 answer:
gregori [183]3 years ago
7 0

Answer:

the color of the litmus paper will turn into blue color because sodium carbonate is basic in nature

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Name the following ketone:
alekssr [168]
A. cyclohexyne is the answer
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Five more than two times the square root of a number is fifteen. What’s the number
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The number is 25. The square root of 25 is 5 and 5x2 is 10 and then 10+5 is 15
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The radius of a uranium atom is 149 pm. How many uranium atoms would have to be laid side by side to span a distance of 4.96 mm?
nikitadnepr [17]

Answer:

4960000000 pm

Explanation:

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Caffeine has the molecular formula, C8H10N4O2. What is the percent composition of caffeine?
Debora [2.8K]

Answer:

b) 49.48% C, 5.19% H, 28.85% N, and 16.48% O

Explanation:

we find the mass for each element in one mole by multiplying the number of atoms in one molecule with the atomic mass

mC=8Ac=8*12=96g

mH=10AH=10*1=10g

mN=4AN=4*14=56g

mO=2AO=2*16=32g

by adding the masses together we find the molar mass of the molecule

M=mC+nH+mN+mO=96+10+56+32=194g/mole

we apply the rule of threes to find the percentage of each element

194g..96gC..10gH...56gN....32gO

100g....a...........b...........c.............d

a=(100*96)/194=49.48%C

b=(100*10)/194=5.19%H

c=(100*56)/194=28.85%N

d=(100*32)/194=16.48%O

3 0
3 years ago
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