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3 years ago

Please help with any

Chemistry

1 answer:

lys-0071 [83]3 years ago

3 0

10 down: Particle with no charge

Answer: Neutron

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Perform the following operation

Paul [167]

$\quad \huge \quad \quad \boxed{ \tt \:Answer }$

$\qquad \tt \rightarrow \:2.8 × {10}^{-5}$

____________________________________

$\large \tt Solution \: :$

$\qquad \tt \rightarrow \: \dfrac{2.36 \times 10 {}^{ - 2} }{8.4 \times {10}^{2} }$

$\qquad \tt \rightarrow \: \dfrac{2.36 }{8.4 } \times \cfrac{10 {}^{ - 2} }{10 {}^{2} }$

$\qquad \tt \rightarrow \: 0.28 \times 10 {}^{ - 2 - 2}$

$\qquad \tt \rightarrow \: 0.28 \times 10 {}^{ - 4}$

$\qquad \tt \rightarrow \: 2.8 \times 10 {}^{ - 5}$

Answered by : ❝ AǫᴜᴀWɪᴢ ❞

4 0

1 year ago

Ice cubes are placed on a table in a warm room. What happens to the ice particles?

Zinaida [17]

Explanation:

I rember when I learned this in 3rd grade

7 0

3 years ago

An unknown insoluble substance displaced the water shown. It's mass is indicated on the triple beam balance. Mass = A. 694 B. 69

vodka [1.7K]

Answer:

D. 693.8.

Explanation:

The first scale of the triple beam balance indicate that the mass is 600.

The second scale of the triple beam balance indicate that the mass is 690.

The third scale of the triple beam balance indicate that the mass is higher that 693.5 and the scale is near but lower than 694, so the mass = 693.8.c

3 0

3 years ago

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The major source of aluminum in the world this bauxite (mostly aluminum oxide). It’s thermal decomposition can be represented by

Artyom0805 [142]

Answer:

The correct answer is 32.2 grams.

Explanation:

Based on the given information, the enthalpy of formation for aluminum oxide is 1676 kJ/mol. It signifies towards the energy that is required to generate aluminum and oxygen, and both of these exhibit zero enthalpy of formation. Therefore, the ΔHreaction is the required energy to generate 2 moles of aluminum. Thus, the energy needed for the formation of single mole of aluminum is,

ΔHrxn = 1676/2 = 838 kJ/mol

Q or the energy input mentioned in the given case is 1000 kJ. Therefore, the number of moles of Al generated is,

(1000 kJ) / (838 kJ/Al mole) = 1.19 moles of Aluminum

The grams of aluminum produced can be obtained by using the formula,

mass = moles * molecular mass

= 1.19 * 26.98

= 32.2 grams.

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3 years ago

The process in which a plant uses sunlight to change water and carbon dioxide into sugar and oxygen quizle?

Svetach [21]

Answer: this process is called photosynthesis

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3 years ago

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