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3 years ago

15

An ___________________ states a position on a topic and then supports that position with reasons and evidence.

1 answer:

Yakvenalex [24]3 years ago

3 0

Argument would make the most sense

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How many neutrons does element X have if its atomic number is 22 and its mass number is 70?

IRINA_888 [86]

It would have 48 neutrons. :)

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On the cooling curve below, between points Dand Ethe substance is changing from

Irina-Kira [14]

Gas to solid ( a ) is correct i think

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3 years ago

What results when equal but opposite charges are present in two regions of a polar molecule? A. dipole B. ionic bond C. Electron

Masteriza [31]

Answer: A. dipole

Explanation:

Dipole can be defined as the separation of the equal and opposite charges present in the molecule via ionic bonding. The water molecule comprising of two molecules of hydrogen being positively charged and one molecule of oxygen being negatively charged are connected via ionic bonding thus water molecule is an example of dipole molecule. There is unequal distribution of the electrical density throughout the molecule.

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3 years ago

A silver block, initially at 57.2 ∘C, is submerged into 100.0 g of water at 24.8 ∘C, in an insulated container. The final temper

Masteriza [31]

Answer:

96.5 grams is the mass of the silver block.

Explanation:

Heat lost by iron will be equal to heat gained by the water

$-Q_1=Q_2$

Mass of iron = $m_1=?$

Specific heat capacity of silver= $c_1=0.240 J/g^oC$

Initial temperature of the silver= $T_1=120^oC$

Final temperature = $T_2=T=26.5^oC$

$Q_1=m_1c_1\times (T-T_1)$

Mass of water= $m_2=100.0 g$

Specific heat capacity of water= $c_2=4.184 J/g^oC$

Initial temperature of the water = $T_3=24.8 ^oC$

Final temperature of water = $T_2=T=26.5^oC$

$Q_2=m_2c_2\times (T-T_3)$

$-Q_1=Q_2$

$-(m_1c_1\times (T-T_1))=m_2c_2\times (T-T_3)$

On substituting all values:

$-(m_1\times 0.240 J/g^oC\times (26.5^oC-57.2^oC))=100.0 g\times 4.184 J/g^oC\times (26.5^oC-24.8^oC)$

we get, $m_1 = 96.5 g$

96.5 grams is the mass of the silver block.

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3 years ago

What is the oxidation state magnesium?

erastova [34]

Magnesium is a 2+ metal, located in the alkaline earth metals group of the periodic table (group 2).

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3 years ago