A
single oxygen has atomic number 8 that means the nuclei of all oxygen atoms
have eight protons. The number of minus-charged electron is two but the number
of electrons is 10. <span>To gain a minus two-charge ion, it
must have two more negative electrons than positive charged protons. With this,
the ion has 10 electrons, which give it a -2 net charge. </span>
Answer: The mass density is 1166.36 
.
Explanation:
Given: Weight of sample in air 
= 500 N
Weight of sample in alcohol 
= 200 N
Specific gravity = 0.7 = 
Formula used to calculate Buoyant force is as follows.
Hence, volume of the material is calculated as follows.
where,
= Buoyant force
= specific gravity
g = acceleration due to gravity = 9.81
Substitute the values into above formula.
Now, mass of the material is calculated as follows.
Therefore, density of the material or mass density is as follows.
Thus, we can conclude that the mass density is 1166.36 .
When you mix 0.1 M HCI, with a drop of brothymol blje, this will make the incubator to change from blue to yellow.
The balanced equation for the above reaction is;
CH₄ + 2O₂ ---> CO₂ + 2H₂O
Stoichiometry of CH₄ to O₂ is 1:2
The number of methane moles present - 1.44 g/ 16 g/mol = 0.090 mol
Number of oxygen moles present - 9.5 g/ 32 g/mol = 0.30 mol
If methane is the limiting reagent,
0.090 moles of methane react with 0.090x 2 = 0.180 mol
only 0.180 mol of O₂ is required but 0.30 mol of O₂ has been provided therefore O₂ is in excess and CH₄ is the limiting reactant.
Number of moles of water that can be produced - 0.180 mol
Therefore mass of water produced - 0.180 x 18 g/mol = 3.24 g
Therefore mass of 3.24 g of water can be produced
Well, even though some baby mammals<span> are born different ways, they all drink milk that comes from </span>their<span> mothers' bodies. Baby pigs, dolphins, bats and elephants all drink milk! Because the </span>babies<span> rely on </span>their<span> mother's milk to live, the </span>mammal<span>mommies have to </span>care for their young<span>.</span>
