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hoa [83]
2 years ago
12

When would scientists need to change a theory?

Chemistry
2 answers:
Tresset [83]2 years ago
7 0

Answer:

As additional scientific evidence is gathered, a scientific theory may be modified and ultimately rejected if it cannot be made to fit the new findings; in such circumstances, a more accurate theory is then required.

Explanation:

<em>please</em><em> follow</em><em> me</em>

<h2><em>iammallika</em></h2>
Artyom0805 [142]2 years ago
3 0

Answer:

if it cannot be made to fit the new findings

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Which sample of HCl reacts at the fastest rate with a 1.0 - gram sample of iron filling
allsm [11]

Question:

The options are;

a. 10. mL of 1 M HCl(aq) at 10.oC

b. 10. mL of 1 M HCl(aq) at 25oC

c. 10. mL of 3 M HCl(aq) at 10.oC

d. 10. mL of 3 M HCl(aq) at 25oC

Answer:

The correct option is;

d. 10 mL of 3 M HCl(aq) at 25 °C

Explanation:

Factors that influence the rate of the reaction include;

Concentration and

Temperature

Concentration

An increase in concentration leads to a increased number of interaction among the the reacting components of HCl and iron filings such that the number of effective interaction or the rate of the reaction increases, therefore, a 10 mL 3 M HCl will react faster than a 10 mL  of 1 M HCl.

Temperature

When the temperature of the reacting HCl is increased, the energy within the reacting system increases leading to an increase in the number of high energy collisions which results in an increased reaction rate, therefore, HCl at 25 °C will react faster than HCl at 10 °C.

Hence the correct option is 10 mL of 3 M HCl(aq) at 25 °C.

3 0
3 years ago
¿Cuántos moles de bióxido de Nitrógeno (NO 2) se forman cuando reaccionan 5 moles de Nitrógeno (N 2)?
o-na [289]

Answer:

10 moles de NO2

Explanation:

Tenemos la ecuación de la reacción como sigue;

 N2 (g) + 2 O2 (g) → 2 NO2 (g)

Asi que;

Si 1 mol de nitrógeno produce 2 moles de NO2

5 moles de nitrógeno producirán 5 * 2/1 = 10

Por tanto, se producen 10 moles de NO2 moles

5 0
2 years ago
After you preform your experiment, you determine that the kf value for naphthalene is 6.91 °c/m . you are using 10g of naphthal
Masteriza [31]
Answer is: molar mass of compound is 154,58 g/mol.<span>
m(</span>naphthalene<span>) = 10 g = 0,01 kg.
m(unknown compound) = 1,00 g.
</span>Δ<span>T (solution) = 4,47 °C.
Kf(</span>naphthalene) = 6,91°C/m<span>; cryoscopic constant.
M</span>(unknown compound) = Kf(naphthalene)· m(unknown compound) ÷ m(naphthalene)<span> · ΔT(solution).
M(xylene) = </span>6,91°C/m<span> · 1 g ÷ 0,01 kg · 4,47</span>°C<span>.
M(xylene) = 154,58 g/mol.</span>
8 0
3 years ago
6. The boys _____ their bags, tied their shoes tight, and started off down the trail. A. readjustment B. adjusted C. adjust D. a
Illusion [34]
B. Adjusted that is your answer
I hope it was helpful
7 0
3 years ago
(a) Which elements are most likely to form ionic compounds? (b) Which metallic elements are most likely to form cations with dif
elena-s [515]

Answer:

A. Generally ionic compounds are formed metal and non metal elements since they forms opposite charged ions due to difference in their Electronegativity values.

NaCl, MgCl2, Ca(OH)2 etc are ionic compounds.

B. Generally transition elements (D elements) forms cations with different charges or simply they exist in different oxidation states due to availability of empty d orbitals.

Examples are Iron exsits as Fe+2 and Fe+3

Mn exists as Mn+2 , Mn+4, Mn+6 ,Mn+7 etc.

3 0
3 years ago
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