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yKpoI14uk [10]
3 years ago
15

What is the length of a football field in (cm)

Chemistry
1 answer:
mina [271]3 years ago
4 0
9144 cm convert yards to meter and then multiply by 100
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A chemist prepares a solution of magnesium chloride MgCl2 by measuring out 49.mg of MgCl2 into a 100.mL volumetric flask and fil
Flura [38]

Answer:  Molarity of Cl^- anions in the chemist's solution is 0.0104 M

Explanation:

Molarity : It is defined as the number of moles of solute present per liter of the solution.

Formula used :

Molarity=\frac{n\times 1000}{V_s}

where,

n= moles of solute

Moles=\frac{\text{Given mass}}{\text{Molar mass}}=\frac{0.049g}{95g/mol}=5.2\times 10^{-4}moles  

V_s = volume of solution in ml = 100 ml

Now put all the given values in the formula of molarity, we get

Molarity=\frac{5.2\times 10^{-4}moles\times 1000}{100ml}=5.2\times 10^{-3}mole/L

Therefore, the molarity of solution will be 5.2\times 10^{-3}mole/L

MgCl_2\rightarrow Mg^{2+}+2Cl^-

As 1 mole of MgCl_2 gives 2 moles of Cl^-

Thus 5.2\times 10^{-3}  moles of MgCl_2 gives =\frac{2}{1}\times 5.2\times 10^{-3}=0.0104

Thus the molarity of Cl^- anions in the chemist's solution is 0.0104 M

6 0
3 years ago
Determine the percent composition by mass of oxygen in the compound C6H1206
inysia [295]

Answer

% of oxygen(O) in glucose = 96/ 180 × 100 = 53.33

Explanation:

so the mass of oxygen in 1 mole of glucose = 6 × 16.00 g = 96.00 g. % oxygen = 96.00 × 100 % = 53.3 % by mass.

3 0
2 years ago
СН3 – СН = СН2 + НCl → help help help help​
Alex

СН₃ – СН = СН₂ + НCl → CH₃-CHCl-CH₃

<h3>Further explanation</h3>

Alkenes are unsaturated hydrocarbons that have a -C = C- double bond.

If there are 2 double bonds it is called an alkadiene, and if there are three double bonds it is called an alkatriene

General formula for Alkenes: CnH2n

addition reactions to alkenes follow Markovnikov's rule. in the addition reaction of hydrogen halide (HX), the halogen atom (X) will be bonded to the carbon atom that binds less H atom.

If the double-bonded carbon atom has the same number of H atoms attached to it, then the X atom will tend to be attached to the carbon atom with the longer alkyl group.

Addition reaction of propene compounds with HCl

СН₃ – СН = СН₂ + НCl → CH₃-CHCl-CH₃

CH - this carbon atom binds fewer H atoms, so Cl is bonded to this bond

5 0
3 years ago
An acid containing the cooh group is called a carbo-oxy acid.
Alexandra [31]
Yes if a molecule with a COOH group is called a carboxylic acid.

hope that helps 
4 0
4 years ago
118g of o2 gas is held at STP what is the volume of gas
shutvik [7]

Answer:

At STP one mole of any gas occupies a volume of 22.4 L: this is the molar volume.

Explanation:

4 0
4 years ago
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