White blood cells (WBCs), also called leukocytes, are the front lines of defense when it comes to our bodies fighting off germs or infection. When we are sick, the immune system snaps into response mode by sending white blood cells to fight off the foreign infection—by either producing protective antibodies or by devouring the bacteria.
1. d.4.125 x 10²⁴ atoms
2. c. 487.73 g
<h3>Further explanation </h3>
The mole is the number of particles(molecules, atoms, ions) contained in a substance
1 mol = 6.02.10²³ particles
Can be formulated
N=n x No
N = number of particles
n = mol
No = Avogadro's = 6.02.10²³
1. 7 moles of phosphorus, so n=7, then number of atoms :
2. 2.5 moles of Pt, so n=2.5, the mass of Pt(MW=195,084 g/mol) :
A reaction occurs between the two gases Chlorine monofluoride (ClF) and Fluorine (F₂) when they are added together and as a result of the reaction a compound named, Chlorine trifluoride (ClF₃) is formed.
The reaction which occurs by addition of Chlorine monofluoride (ClF) and Fluorine (F₂) is as follows -
ClF (g) + F₂ (g) = ClF₃ (l)
When one molecule of Chlorine monofluoride (ClF) reacts with one molecule of Fluorine (F₂) gas, both the gases react together to form one molecule of Chlorine trifluoride (ClF₃) which is a liquid. Therefore, the above reaction is already balanced.
Chlorine trifluoride (ClF₃) is a greenish-yellow liquid which acts as an important fluorinating agent and is also an interhalogen compound (compounds that are formed by mixing two different halogen compounds together). Other than it's liquid state ClF₃ also can exist as a colorless gas. This compound ClF₃ is a very toxic, very corrosive and powerful oxidizer used as an igniter and propellent in rockets.
Learn more about Chlorine monofluoride (ClF) here-
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The number of moles of each product that are formed if 2 moles of Fe2O3 react with 9 moles of CO is 4 moles of Fe and 6 moles of CO2
Explanation
write a balanced chemical reaction
that is FeO3 + 3 CO → 2 Fe + 3CO2
2 moles of Fe2O3 reacted with 3 x2=6 moles of Co to form Fe and CO2 therefore CO was in excess and Fe2O3 was limiting reagent.
use the mole ratio to determine the moles of each product.
that is <em>the mole ratio 0f Fe2O3 : Fe is 1:2 therefore the moles of Fe = </em>2x2=4 moles
<em>the mole ratio of Fe2CO3 : CO2 is 1: 3 therefore the moles of Co2 =</em><em> 2 x3= 6 moles</em>