Answer:
19.7 g of CaCl₂ are produced in the reaction
Explanation:
In this excersise we need to know the limiting reactant in order to determine the mass produced of a one of the products
The reaction is: CaCO₃ (s) + 2HCl (aq) → CaCl₂(aq) + H₂O (l) + CO₂(g)
First of all we must find the limiting reactant. For that purpose, we convert the mass of reactants to moles
25 g / 100.08 g/mol = 0.249 moles of carbonate
13 g / 36.45 g/mol = 0.357 moles of HCl
We work with the stoichiometry of the reaction:
1 mol of carbonate reacts with 2 moles of hydrochloric
Then, 0.249 moles of carbonate must react with (0.249 . 2) /1 = 0.498 moles of HCl (We do not have enough HCl, so this is the limtiing reactant)
We work with the stoichiometry reactant / product
2 moles of HCl can produce 1 mol of CaCl₂
Therefore 0.357 moles of HCl must produce (0.357 .1) / 2 = 0.178 moles of chloride.
We convert the moles to mass → 0.178 mol . 110.98 g /1mol = 19.7g
<span>The atomic number of an element indicates only how many protons are in that specific element. The atomic number of sulfur is 16, so it means that in one sulfur atom, there are 16 protons. The number of protons is also equal to the number of electrons in any given atom, so this number also indicates that there are 16 electrons in a sulfur atom.</span>
Explanation:
a) X = 2,8,1 Y= 2,8,7
b) NaCl
c) X= 1 Y = 1
d) X shoot around water
and it less dense than water so it float s on water
2)Carbon moves from the atmosphere to plants. ...
Carbon moves from plants to animals. ...
Carbon moves from plants and animals to soils. ...
Carbon moves from living things to the atmosphere. ...
Carbon moves from fossil fuels to the atmosphere when fuels are burned. ...
Carbon moves from the atmosphere to the oceans.
3)PVC is used to make pipes, polyvinyl flooring and siding, hoses, cable coatings, medical devices, and plumbing and automotive parts. It is used to make material for upholstery, housewares, shower curtains, raincoats, toys, school supplies, food packaging, and shoes.
Answer:
Explained below.
Explanation:
In oil rigs, Sacrificial protection is the protection of the steel against corrosion by using magnesium block which is a more reactive metal. This means that steel which is to be protected from corrosion will be the cathode while magnesium block preventing it from corrosion will be the anode and as such the block will be the one to corrode instead.
The mechanism behind this sacrificial protection is that the steel pipe on the rig will be connected to the magnesium block through copper wires and then the magnesium block will donate its electrons to the steel thereby preventing it from rusting. Thus is a reversible reaction and as such, after the steel Iron undergoes oxidization by receiving electrons from the magnesium block, it will be immediately be reduced to iron as depicted in the equation below.
Mg⇌Mg^(2+) + 2e-
Fe^(2+) + 2e-⇌Fe
The next important breakthrough was in 1802; this is when Dalton restored the study of matter with his Atomic theory. His theory stated that atoms are the fundamentals of nature and can only combine in whole number ratios.
HOPE THIS HELPED :)
