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2 years ago

Which of the following could be considered a scientific method? 01.01 the science of chemistry

Chemistry

2 answers:

Lorico [155]2 years ago

6 0

Choose all options that apply. Which of the following are equal to 20%? | a) .25 b) 1/5 Oc) 1/10 d) .20

d1i1m1o1n [39]2 years ago

3 0

Answer:

a) the ability to extend the theory to make predictions

b) it is explanatory

Explanation:

Could be a Hallmark of a Scientific Theory: a & b

-Quizlet

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Balancing oxidation-reduction reactions <br> Mg+ N2—>Mg3N2

BartSMP [9]

Answer:

${ \sf{3Mg_{(s)} + N_{2(g)} →Mg _{3}N_{2(s)}}}$

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3 years ago

How can we fix the affects the affects of acid rain

dybincka [34]

Adaptation actually and also following control measures on how to avoid it from happening

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2 years ago

A 100.0 mL sample of a 0.200 M aqueous solution of K2CrO4 was added to 100.0 mL of a 0.100 M aqueous solution of BaCl2. The mixt

stepan [7]

The correct answer is 2.53 g of precipitate, BaCrO4.

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3 years ago

When a lead acid car battery is recharged by the alternator, it acts essentially as an electrolytic cell in which solid lead(II)

katen-ka-za [31]

Answer:

3.81 g Pb

Explanation:

When a lead acid car battery is recharged, the following half-reactions take place:

Cathode: PbSO₄(s) + H⁺ (aq) + 2e⁻ → Pb(s) + HSO₄⁻(aq)

Anode: PbSO₄(s) + 2 H₂O(l) → PbO₂(s) + HSO₄⁻(aq) + 3H⁺ (aq) + 2e⁻

We can establish the following relations:

1 A = 1 c/s
1 mole of Pb(s) is deposited when 2 moles of e⁻ circulate.
The molar mass of Pb is 207.2 g/mol
1 mol of e⁻ has a charge of 96468 c (Faraday's constant)

Suppose a current of 96.0A is fed into a car battery for 37.0 seconds. The mass of lead deposited is:

$37.0s.\frac{96.0c}{s} .\frac{1mole^{-} }{96468c} .\frac{1molPb}{2mole^{-} } .\frac{207.2gPb}{1molPb} =3.81gPb$

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3 years ago

In a chemical reaction, an atom of lithium (Li) loses an electron, and an atom of chlorine (Cl) gains an

Blababa [14]

Answer:

Explanation:

Li will have + charge and Cl with - charge.. Positive and negative attract each other forming ionic bond

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3 years ago