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AveGali [126]
2 years ago
14

Which statements describe the Rutherford atomic model? Check all that apply.

Chemistry
2 answers:
MaRussiya [10]2 years ago
7 0

Answer:

1 and 4

Explanation:

ziro4ka [17]2 years ago
6 0

Answer:

1 and 4 is correct

Explanation:

(;

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inessss [21]

Answer:

0.44316859040048207mol

Explanation:

7 0
2 years ago
A 2.50 g sample of solid sodium hydroxide is added to 55.0 mL of 25 °C water in a foam cup (insulated from the environment) and
zlopas [31]

Answer:

37.1°C.

Explanation:

  • Firstly, we need to calculate the amount of heat (Q) released through this reaction:

<em>∵ ΔHsoln = Q/n</em>

no. of moles (n) of NaOH = mass/molar mass = (2.5 g)/(40 g/mol) = 0.0625 mol.

<em>The negative sign of ΔHsoln indicates that the reaction is exothermic.</em>

∴ Q = (n)(ΔHsoln) = (0.0625 mol)(44.51 kJ/mol) = 2.78 kJ.

  • We can use the relation:

Q = m.c.ΔT,

where, Q is the amount of heat released to water (Q = 2781.87 J).

m is the mass of water (m = 55.0 g, suppose density of water = 1.0 g/mL).

c is the specific heat capacity of water (c = 4.18 J/g.°C).

ΔT is the difference in T (ΔT = final temperature - initial temperature = final temperature - 25°C).

∴ (2781.87 J) = (55.0 g)(4.18 J/g.°C)(final temperature - 25°C)

∴ (final temperature - 25°C) = (2781.87 J)/(55.0 g)(4.18 J/g.°C) = 12.1.

<em>∴ final temperature = 25°C + 12.1 = 37.1°C.</em>

6 0
3 years ago
An Earth-like planet is 500 light years away why is this an Obstacle for a manned Space mission?
maxonik [38]

Answer:c the correct technology cannot support this mission

Explanation:

3 0
3 years ago
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36g of an alloy of copper and zinc contains 45% copper. how much pure copper do you need to add in order to get a 60% copper all
iogann1982 [59]
First, you need to count copper mass in alloy.
Second, you have to make an equation an find x ( the copper mass must be added). The answer is: 13,5g pure copper

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3 years ago
Which of the following is an example of a compound?
VladimirAG [237]

Answer:

H2O is a compound because its a main constitute of earths hydrosphere

3 0
3 years ago
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