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horsena [70]
3 years ago
12

Which answer choice best describes why the results of Ernest Rutherford's gold foil experiment led him to propose the concept of

a nucleus? A.) The positively charged alpha particles were deflected more often than expected, which indicated that the gold atoms' negative charges were located at the center of each atom. B.) The positively charged alpha particles were deflected less often than expected, which indicated that the gold atoms' negative charges were not evenly distributed throughout each atom. C.) The positively charged alpha particles were deflected less often than expected, which indicated that the gold atoms' positive charges were located around the outside of each atom. D.) The positively charged alpha particles were deflected more often than expected, which indicated that the gold atoms' positive charges were not evenly distributed throughout each atom.
Chemistry
2 answers:
mixas84 [53]3 years ago
8 0
<h3><u>Answer;</u></h3>

D.) The positively charged alpha particles were deflected more often than expected, which indicated that the gold atoms' positive charges were not evenly distributed throughout each atom.

<h3><u>Explanation</u>;</h3>
  • <em><u>During the experiment, alpha particles bombarded a thin piece of gold foil. The alpha particles were expected to pass easily through the gold foil. Every now and then, however, an alpha particle bounced back- an unexpected result. Rutherford concluded that these particles were striking a tiny region of positive charge.</u></em>
  • The discovery of the nucleus was a result of Rutherford's observation that a small percentage of the positively charged particles bombarding the metal's surface were deflected back towards the source.
  • He concluded that each atom contained a very small, very dense, positively charged center which he called the nucleus.
hammer [34]3 years ago
3 0

Answer:

D

Explanation:

The positively charged alpha particles were deflected more often than expected, which indicated that the gold atoms' positive charges were not evenly distributed throughout each atom.

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3 0
2 years ago
1. A sample of oxygen is collected over water at 22 ° C and 762 torr. What is the partial pressure of the dry oxygen? The vapor
Rom4ik [11]

Answer: The partial pressure of the dry oxygen is 742 torr

Explanation:

Dalton's Law of Partial Pressure states that the total pressure exerted by a mixture of gases is the sum of partial pressure of each individual gas present. Thus P(total)=P_1+P_2 .........

Given; Total pressure = 762 torr

partial pressure of water = 19.8 torr

partial pressure of dry oxygen = ? torr

Total pressure  = partial pressure of water + partial pressure of dry oxygen

762 torr = 19.8 torr = partial pressure of dry oxygen

partial pressure of dry oxygen = 742 torr

The partial pressure of the dry oxygen is 742 torr

8 0
3 years ago
Arizona was the site of a 400,000-acre wildfire in June 2002. How much carbon dioxide (CO2) was produced into the atmosphere by
kodGreya [7K]

Answer:

2.97 × 10¹³ g

Explanation:

First, we have to calculate the biomass the is burned. We can establish the following relations:

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  • 50% of the biomass is burned

The biomass burned in the site of 400,000 acre is:

400,000acre\times\frac{10,000m^{2} }{2.47acre} \times \frac{10kgC}{m^{2} } \times 50\% = 8.10 \times 10^{9} kgC

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We can establish the following relations:

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The mass of  produced is CO₂:

8.10 \times 10^{12}gC \times \frac{1molC}{12.01gC} \times \frac{1molCO_{2}}{1molC} \times \frac{44.01gCO_{2}}{1molCO_{2}} =2.97 \times 10^{13} gCO_{2}

4 0
3 years ago
The main group elements exclude which parts of the periodic table?*
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Answer:

Transition metals and lanthanide metals

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Alkali metals, alkaline earth metals, halogens, and noble gases are all part of the main group elements.

Periods and families simply refer to the rows and columns of the periodic table.  They don't specify the type of element.

7 0
3 years ago
When a hydrocarbon fuel is burned, almost all of the carbon in the fuel burns completely to form CO2 (carbon dioxide), which is
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Answer:

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Amount of CO2 = 2.1 * 10^8 kWh * 0.59 = 1.239 * 10^8 Kg

8 0
3 years ago
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