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3 years ago

Read the following summary, which describes a body process. Then, answer the question.

Chemistry

1 answer:

Maksim231197 [3]3 years ago

7 0

Answer:

Respiritation

Explanation:

Its Respiration because the process of breathing is known as respiration and also read the paragraph hhhhhhhhhhhhhhhhhhhhhhhh

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10 Give the symbol and Latin name of the following elements

Romashka-Z-Leto [24]

Answer:

Explanation:

Antimony- sb and the latin name: stibium

Copper- Cu and the latin name: cuprum

Gold- Au and the latin name: Aurum

Mercury- Hg and the latin name: hydrargyrum

Tron- There is no such element as tron

Lead- Pb and the latin name: plumbum

Potassium- K and the latin name: kalium

Silver- Ag and the latin name: argentum

Sodium- Na and the latin name: natrium

Tin- Sn and the latin name: stannum

~~~Inuola1234

8 0

3 years ago

A 21.8 g sample of ethanol (C2H5OH) is burned in a bomb calorimeter, according to the following reaction. If the temperature ris

Blababa [14]

Answer: The heat capacity of calorimeter is $15.66J/^oC$

Explanation:

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Given mass of ethanol = 21.8 g

Molar mass of ethanol = 46.07 g/mol

Putting values in above equation, we get:

$\text{Moles of ethanol}=\frac{21.8g}{46.07g/mol}=0.473mol$

To calculate the enthalpy change of the reaction, we use the equation:

$\Delta H_{rxn}=\frac{q}{n}$

where,

$q$ = amount of heat released = ?

n = number of moles = 0.473 moles

$\Delta H_{rxn}$ = enthalpy change of the reaction = -1235 kJ/mol = $-1235\times 10^3J/mol$ (Conversion factor: 1 kJ = 1000 J)

Putting values in above equation, we get:

$-1235\times 10^3J/mol=\frac{q}{0.473mol}\\\\q=(-1235\times 10^3J/mol\times 0.473mol)=-584.16\times 10^3J$

To calculate the heat capacity of calorimeter, we use the equation:

$q=c\Delta T$

where,

q = heat absorbed by the calorimeter = $584.16\times 10^3J$

c = heat capacity = ?

$\Delta T$ = change in temperature = $T_2-T_1=62.3^oC-25^oC=37.3^oC$

Putting values in above equation, we get:

$584.16\times 10^3J=c\times 37.3^oC\\\\c=\frac{584.16\times 10^3J}{37.3^oC}=15.66J/^oC$

Hence, the heat capacity of calorimeter is $15.66J/^oC$

4 0

4 years ago

PLZ HELP ILL MARK BRAINLIST!!!!!

stich3 [128]

“Genes carry the information that determines your traits (say: trates), which are features or characteristics that are passed on to you — or inherited — from your parents. Each cell in the human body contains about 25,000 to 35,000 genes”.

Website:kidshealth.org

3 0

3 years ago

Write the empirical formula of at least four binary ionic compounds that could be formed from the following ions:

Mazyrski [523]

Ionic compounds are the compounds consists of positive and negative ions.
Zn(2+):------
ZnBr2:
ZnS:
Al(+3):------
Al203
Al2(SO4)^3
Cl:(1-)
NaCl

7 0

4 years ago

Question 2(Multiple Choice Worth 3 points) What happens to the rate of most reactions as the reaction progresses? The rate remai

Sav [38]

Answer: -

The rate decreases as the concentration of the reactants decreases

Explanation: -

A reaction involves change of the reactants into products.

Initially there is only reactants. So the rate if reaction is high.

After some time there are products. So the amount of reactant is less.

Reactions involve collisions of reactant molecules. As the reactant amount decreases, collisions between the reactants decreases. As such the rate of reaction decreases with the progress of the reaction.

3 0

3 years ago