Answer: it is a solid at room temperature.
Explanation:
The ions of the two reactants are Na{+} and Br{-}, so the formula of the product is NaBr.
and when the NaCl is a solid a room temperature. and when NaBr has similar properties to NaCl, so NaBr is a solid at room temperature too.
so our chemical formula for the product is NaBr and It's a solid at room temperature.
The mass of three samples are 0.12 g, 1.8 g and 0.562 g. (given)
During addition (mathematical operation) of significant figures following rules are followed:
1. The number of significant figures are counted.
2. Addition is done.
3. Round the answer to the least number of decimal places.
Following the above rules, the addition of mass of the three samples is as follows:
![0.12 g + 1.8 g + 0.562 g = 2.482 g \simeq 2.5 g](https://tex.z-dn.net/?f=0.12%20g%20%2B%201.8%20g%20%2B%200.562%20g%20%3D%202.482%20g%20%5Csimeq%202.5%20g)
Hence,
is the combined mass of all the three samples.
The calories per gram of each substance are:
Protein: 4 calories / gram
Carbohydrates: 4 calories / gram
Fat: 9 calories / gram
So, one bar contains:
50 * 4 + 10 * 9 + 40 * 4
450 calories
If she were to eat only these bars, she will need:
2,700 / 450
= 6 nutrition bars for her climb
Answer:
<em>Figure attached </em>
Explanation:
A. Lewis dot structure
Number of electrons
Number of electrons by H = 1 e
Number of electrons by O = 6 (3)
Number of electrons by O = 18 e
Number of electrons by N = 5 e
Total in HNO3 = 24 e
Resonance structures
In resonance structures we mostly prefer 1st two structures because 3rd one have high charge so it is very unstable form then the other two. Figure 4 contains the hybrid structure which is mostly used in literature.