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8090 [49]
3 years ago
7

How many moles of heptane will completely react with 1.42 of molecular oxygent

Chemistry
1 answer:
Fofino [41]3 years ago
5 0
Write and balance the equation

C7H16 + 11 O2 -> 7 CO2 + 8 H2O

According to the stoichiometry of the reaction one mol of heptane will react with 11 mol of molecular oxygen, then

1.42 mol O2 x 1 mol heptane/ 11 mol O2 = 0.129 mol

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Atom , classify it<br><br><br><br><br>helppoppppoeowiie​
timama [110]

Answer:

A atom is a small unit to which matter can be divided without releasing electrically charged particles

Explanation:

5 0
2 years ago
Which of the following changes depending on the strength of the gravity field it is in?
Lelechka [254]
Im pretty sure it weight because when we are on different plants with a different amount of gravitational pull our weight changes

hope this helps :)
4 0
2 years ago
Read 2 more answers
The smallest part of a compound that still acts like that compound is ____.
Leokris [45]
It is a molecule of the compound.
3 0
2 years ago
A sheet of gold weighing 8.8 g and at a temperature of 10.5°C is placed flat on a sheet of iron weighing 19.5 g and at a tempera
timofeeve [1]

Answer:

T = 36.393\,^{\textdegree}C

Explanation:

The contact between the sheet of gold and the sheet of iron allows a heat transfer until thermal equilibrium is done, which means that both sheets have the same temperature:

-Q_{iron} = Q_{gold}

-(0.008\,kg)\cdot (452\,\frac{J}{kg\cdot ^{\textdegree}C} )\cdot (T-54.4\,^{\textdegree}C) = (0.0195\,kg)\cdot (129\,\frac{J}{kg\cdot ^{\textdegree}C} )\cdot (T-10.5\,^{\textdegree}C)

-(3.616\,\frac{J}{^{\textdegree}C})\cdot (T-54.4\,^{\textdegree}C) = (2.515\,\frac{J}{^{\textdegree}C})\cdot (T-10.5^{\textdegree}C)

-1.438\cdot (T - 54.4^{\textdegree}C) = T-10.5^{\textdegree}C

-1.438\cdot T +78.227^{\textdegree}C = T - 10.5^{\textdegree}C

2.438\cdot T = 88.727\,^{\textdegree}C

The final temperature is:

T = 36.393\,^{\textdegree}C

8 0
3 years ago
Read 2 more answers
C time
lesya692 [45]

Answer:

B. Spring balance - a device used for measuring the weight or force of gravity acting on an object.

Explanation:

A Force is any interaction that changes the motion or position of an obkpjectbthatbit is interacting with. Whenever there is an interaction between two objects, there is a force exerted by each of the objects on one themselves.

Forces are generally divided into contact forces and non-contact over field forces.

In contact forces, the two objects physically in contact with each other. Examples of contact forces are push or pull forces, frictional forces, tensional forces, spring forces, etc.

Non-contact forces are forces in which the two objects interacting do no need to be physically in contact with one another. Examples include, gravitational forces, magnetic forces, electrical forces, etc.

Instruments used in measuring forces are known as force gauges.

From the instruments listed above:

A. A ruler is an instrument used in measuring length

B. Spring balance is a device used for measuring the weight or force of gravity acting on an object.

C. A thermometer is an instrument used in measuring temperature

D. A windbvane is an instrument used in measuring wind direction.

4 0
3 years ago
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