In which equation does the term "heat" represent heat of fusion?(1) NaCl(s) + heat -->NaCl(l)
(2) NaOH(aq) + HCl(aq) -->NaCl(aq) + H2O(l) + heat
(3) H2O(l) + heat --> H2O(g)
(4) H2O(l) + HCl(g) -->H3O+(aq) + Cl-(aq) + heat

Answers

Answer 1

Answer:

The equation where the term heat represents the heat of fusion is NaCl(s) + heat -->NaCl(l).

The heat of fusion is the heat required to break the intermolecular interactions in a solid as it is converted to the liquid. Hence, the process of fusion is the process of converting a solid into a liquid.

Examining the equations shown in the options closely, we will discover that in the equation; NaCl(s) + heat -->NaCl(l), heat is supplied to sodium chloride solid and it is converted to liquid. The heat involved in this process is the heat of fusion.

Learn more: brainly.com/question/24775418

Answer 2

Answer:

The answer is 1

Explanation:

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propose a mathematical equation to calculate tje charge on an ion from the number of protons and electrons in an ion.

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If the ion is a cation, it has a positive charge because it LOST electrons. If its an anion, then it has a negative electron because it GAINED electrons.

Which element is rolled into a foil found and used in your kitchen?

Answers

The question is asking to determine what kind of element is rolled into a a foil and used in you kitchen, and base on my own research and also in understanding the elements, I would say that the answer would be Aluminum. I hope you are satisfied with my answer and feel free to ask for more

aluminium ........................

i feel twitchy and not able to focus without my good friend (dylan) around, help? i dont like him like that, plus im already with someone, uhhh i cant explain this; helpp

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The volume of a gas decreases from 15.7 m3 to 11.2 m3 while the pressure changes from 1.12 atm to 1.67 atm. If the initial temperature is 245 K, what is the final temperature of the gas

Answers

The final temperature of the gas is 260.01 K.

The final temperature can be calculated by using the equation as follows:-

$(P_(1)V_(1) )/(T_(1)) =(P_(2)V_(2) )/(T_(2))$ ........(1)

Here, $P_1$ and $P_2$ is the pressure of this gas before and after the changes.

$V_1$ and $V_2$ is volume of this gas before and after the changes.

$T_1$ and $T_2$ is the temperature (in degrees Kelvins) of this gas before and after the changes.

Given values:-

$P_1=1.12\ atm, P_2=1.67\ atm\n\nV_1=15.7\ m^(3) , V_2=11.2\ m^(3)\n\nT_1=245\ K.T_2=?$

Substitute all the values in the equation (1) as follows:-

$(1.12\ atm*15.7\ m^(3))/(245\ K ) =(1.67\ atm*11.2\ m^(3))/(T_2 )\nT_2=(1.67\ atm*11.2\ m^(3)*245\K)/(1.12\ atm*15.7\ m^(3) )\n=260.60\ K$

Hence, the final temperature of the gas is 260.60 K.

To know more about:-

brainly.com/question/23967621

Explanation:

The data is given as follows.

$P_(1)$ = 1.12 atm, $P_(2)$ = 1.67 atm

$V_(1) = 15.7 m^(3)$ , $V_(2) = 11.2 m^(3)$

$T_(1) = 245 K$ , $T_(2)$ = ?

Therefore, calculate the final temperature using the relation as follows.

$(P_(1)V_(1))/(T_(1))$ = $(P_(2)V_(2))/(T_(2))$

$(1.12 atm * 15.7 m^(3))/(245)$ = $(1.67 atm * 11.2 m^(3))/(T_(2))$

$T_(2) = (1.67 atm * 11.2 m^(3) * 245 K)/(1.12 atm * 15.7 m^(3))$

= $(4582.48 K)/(17.584)$

= 260.605 K

= 260.61 K (approx)

Thus, we can conclude that final temperature is 260.61 K.

How many grams of CU are required to replace 45.0 grams of silver nitrate?1Cu + 2AgNO3 -> 1Cu (No3)2 +2Ag

Answers

Molar mass Cu = 63.546 g/mol and AgNO₃ = 169.87

1 Cu + 2 AgNO₃ -> 1 Cu (NO₃)₂ +2 Ag

63,546 -------- 2 * 169.87
? g Cu ------- 45.0

Mass ( Cu ) = 45.0 * 63,546 / 2 * 169.87

Mass ( Cu ) = 2859,57 / 339,74

Mass = 8.4169 g of Cu

hope this helps!

Which of the following is the SI unit used to measure mass?

Answers

The SI unit used to measure mass is said to be option A: kilogram (kg).

What is the SI unit used to measure mass?

The kilogram (kg) is the standard unit used to measure mass. The kilogram is the main unit used to measure how heavy something is in the International System of Units. It is based on the weight of a special cylinder made of platinum and iridium called the International Prototype of the Kilogram.

The liter (b.) is the SI unit for volume, the meter (c.) is the SI unit for length, and the Kelvin (d.) is the SI unit for temperature. The kilogram is commonly used as a standard unit for measuring weight in science, industry, and everyday situations.

Hence option A is correct.

In which equation does the term "heat" represent heat of fusion?(1) NaCl(s) + heat -->NaCl(l)(2) NaOH(aq) + HCl(aq) -->NaCl(aq) + H2O(l) + heat(3) H2O(l) + heat --> H2O(g)(4) H2O(l) + HCl(g) -->H3O+(aq) + Cl-(aq) + heat

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What is the SI unit used to measure mass?

In which equation does the term "heat" represent heat of fusion?(1) NaCl(s) + heat -->NaCl(l)
(2) NaOH(aq) + HCl(aq) -->NaCl(aq) + H2O(l) + heat
(3) H2O(l) + heat --> H2O(g)
(4) H2O(l) + HCl(g) -->H3O+(aq) + Cl-(aq) + heat