in a molecule of methane, carbon (having four valence electrons) binds to four hydrogen atoms. how many lone pairs of electrons will be represented in the lewis structure of methane? a. four b. two c. one d. zero

Answers

Answer 1

Answer: D. Each bond is a single bond. Allowing all 4 valence electrons in the carbon to be taken up by the one valence electron in the four hydrogen atoms.

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What ion must be present for a compound to be considered a base?

Answers

it is OH- (hydroxide ion)

What is quantitative and qualitative

Answers

Quantitative is a description in numbers , and qualitative is a description with words

A 0.300 g piece of copper is heated and fashioned into a bracelet. The amount of energy transferred by heat to the copper is 66,300 J. If the specific heat of copper is 390 J/g 0C, what Is the change of the copper's temperature?

Answers

Answer:

X=600 degrees celsius

Explanation:

We can evaluate by using the equation ==> Q=m(c)(delta T)

-We know the mass is 0.3 g

-Q= 66,300 J

-C= 390 j/g 0C

-Therefore, we need to solve for delta T (which will be represented by x)

Q= mct

66,300 J= 0.3 g (390 J/g 0C) (t)

The unit of measurement (g-grams) can be crossed out on the left side of our expression.

66,300 J=0.3(390 J 0C) (t)

-If we convert into a proportional relationship:

66,300 J 117 J/0C x

------------ = -----------

117 J/0C 117 J/0C

-Joules on both sides can be crossed off

*117 J/0C came from the product in terms of 0.3(390 J 0C)

*If we find the quotient of 66,300 J and 117 J/0C, we get 566.6 repeating

-You may keep the answer as it is, although for simplicity reasons, we can round to the nearest hundred.

-Therefore, x=600.

-----Remember, x represented the delta t in our equation. (I made notice of that when evaluating).

Hope this helps! :)

Which of the following leads to a lower rate of diffusion? A. Heated gas
B. Lower molar mass of particles
C. Higher velocity of particles
D. Reduced temperature

Answers

Reduced temperature leads to a lower rate of diffusion. Hence, Option (D) is the correct answer.

What is Diffusiion ?

Diffusion is the net movement of anything generally from a region of higher concentration to a region of lower concentration.

Diffusion is driven by a gradient in Gibbs free energy or chemical potential.

Therefore, Reduced temperature leads to a lower rate of diffusion. Hence, Option (D) is the correct answer.

Learn more about Diffusion here ;

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Answer:

Explanation:

test...

A pencil has density of 0.875 g/cm^3. It has a volume of 4.0 cm^3. What is the mass?

Answers

Answer:

3.5g

Explanation:

$Density=(mass)/(volume)\n Mass= Density X Volume\nMass = 0.875 X 4.0\nTherefore, Mass = 3.5 g$

Answer:

3.703703703703

Explanation:

These elements most likely belong to which group?

Answers

The group 13 I hope this help

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Select all that apply.Hydraulic systems work because _____. liquids are incompressible pressure is transmitted equally throughout a liquid gases are incompressible pressure and force are the same thing

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Which elements in the periodic table are metalloids or have semimetallic properties