Answer: 0.33 moles
Explanation:
Given that,
Amount of moles of Na2CO3 (n) = ?
Mass of Na2CO3 in grams = 35g
For molar mass of Na2CO3, use the molar masses as follows:
Sodium, Na = 23g;
Carbon, C= 12g
Oxygen, O = 16g
Na2CO3 = (23g x 2) + 12g + (16g x 3g)
= 46g + 12g + 48g
= 106g/mol
Since, n = mass in grams / molar mass
n = 35g / 106g/mol
n = 0.33mole
Thus, 0.33 moles of Na2Co3 is needed to produce 35g of Na2Co3
Answer: Glucose is a simple sugar with six carbon atoms and one aldehyde group.
Explanation: hope this helps you
Answer:
The sample is fool's gold
Explanation:
Density is defined as the ratio between mass in grams and volume in mililiters.
A sample of pure gold has a density of 19.3g/mL.
Using Archimedes' principle, the volume of the sample is:
52.2mL - 47.5mL = 4.7mL
As the mass of the sample is 23.5g, the density is:
23.5g / 4.7mL = 5g/mL
The denisty of the sample is very different to density of pure gold, that means:
<em>the sample is fool's gold</em>
Answer:
1.43×10⁶ > 2.34×10⁵> 3.25×10⁴>4.56×10³> 5.17×10²
Explanation:
First of all we will write these values in simple notation.
1) 1.43×10⁶
1.43×1000000
1430000
2) 5.17×10²
5.17×100
517
3) 2.34×10⁵
2.34×100000
234000
4) 3.25×10⁴
3.25×10000
32500
5) 4.56×10³
4.56×1000
4560
Rank from greatest to least.
1.43×10⁶ > 2.34×10⁵> 3.25×10⁴>4.56×10³> 5.17×10²
Answer:
Any conductor (thing that electricity can go through) is made of atoms. Each atom has electrons in it. If you put new electrons in a conductor, they will join atoms, and each atom will deliver an electron to the next atom. This next atom takes in the electron and sends out another one on the other side.
Explanation:
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