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3 years ago

5

What is another name for the heat involved in a reaction?

1 answer:

wlad13 [49]3 years ago

4 0

There is your answer

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What's the difference between an electron?

kondaur [170]

Answer:

An atom is a structure consisting of a nucleus, composed of protons and neutrons. and electrons orbiting around the nucleus. Protons, neutrons and electrons are considered to be 'fundamental particles (at least as far as chemistry is concerned. In physics, protons and neutrons are composed of even smaller particles). Hence electrons are one of the fundamental particles that make up atoms.

Explanation:

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3 years ago

Calculate the grams of CaCl2 necessary to make a 0.15M solution.

NNADVOKAT [17]

Answer:

Gram molecular mass = 40 + (35.5)2 = 111g

Mass of $CaCl_2$ in 1 mole = 111g

Mass of $CaCl_2$ in 0.15 mole = 111 × 0.15 = 16.65 g

8 0

4 years ago

What is the molarity of a solution that contains 40.

Allushta [10]

Answer:

b

Explanation:

because it be an the only answer there

8 0

3 years ago

Which statement about the neutrons that make up an element is true?

ziro4ka [17]

C. They have no electrical charge/NEUTral

Hope it helps!

3 0

3 years ago

A gaseous fuel mixture stored at 747 mmHg and 298 K contains only methane (CH4) and propane (C3H8). When 11.1 L of this fuel mix

Alisiya [41]

Answer:

$M_f=38.8\%$

Explanation:

From the question we are told that:

Pressure $P=747mmHg$

Temperature $T=298K$

Volume $V=11.1$

Heat Produced $Q=780kJ$

Generally the equation for ideal gas is mathematically given by

$PV=nRT$

$n= (747/760) *11.1/ (0.0821*298)$

$n=0.446mol$

Therefore

$x+y=0.446$

$x=0.446-y .....1$

Since

Heat of combustion of Methane=889 kJ/mol

Heat of combustion of Propane=2220 kJ/mol

Therefore

$x(889) + y(2220) = 760 ...... 2$

Comparing Equation 1 and 2 and solving simultaneously

$x=0.446-y .....1$

$x(889) + y(2220) = 760 ...... 2$

$x=0.173$

$y=0.273$

Therefore

Mole fraction 0f Methane is mathematically given as

$M_f=\frac{x}{n}*100\%$

$M_f=\frac{1.173}{0.446}*100\%$

$M_f=38.8\%$

7 0

3 years ago