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3 years ago

Which of the following elements will gain an electron to become an

Chemistry

1 answer:

Maurinko [17]3 years ago

6 0

Answer:

F which is Flourine.

Explanation:

This is because it has 7 valence electrons therefore it will have to gain an electron to form an ion (anion) and become stable

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A machine have 75% efficiency,what does it mean.

Kazeer [188]

Answer:

A machine have 75% efficiency means 25% of efficiency has been lost due to friction and a machine can work 75% only.

8 0

3 years ago

Based on the molecular formula, determine whether each compound is an alkane, alkene, or alkyne. (Assume that the hydrocarbons a

topjm [15]

Answer:

a. alkyne

b. alkane

c. alkyne

d. alkene

Explanation:

The general formula for each class of compound is given below

Alkane: $C_nH_{2n+2}$

Alkene: $C_nH_{2n}$

Alkyne: $C_nH_{2n-2}$ (assuming single multiple bonds)

Now let us classify according to the above formulas:

a. It has two hydrogen atoms less than the two times of carbon atoms hence, it's alkyne

b. It has two hydrogen atoms more than the two times of carbon atoms hence, it's alkane

c. It has two hydrogen atoms less than the two times of carbon atoms hence, it's alkyne

d. It has hydrogen atoms two times of carbon atoms hence, it's alkene

5 0

3 years ago

Read 2 more answers

How is sound energy produced? A. by vibrating objects B. by stationary objects C. by temperature differences D. by objects being

viva [34]

Sound energy is produced by vibrating objects.

Example: when you speak you vibrate the air molecules in the air. If you where to speak in space no “sound” would be produced since there is nothing for the vibration of your voice to travel through.

8 0

3 years ago

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A patient needs to take 875mg twice daily The pills in the bottle are each 250mg How many pills does she wants to take 875mg

Angelina_Jolie [31]

Answer:

$3.5$ pill need to taken for completing dosage of $875$ mg

Explanation:

Total dosage of medicine to be taken in a day

$= 2 * 875 \\= 1750$ mg

Total weight of one pill $= 250$ mg

Number of pills required is equal to total dosage of medicine divided by the weight of one pill.

Hence,

Number of pills

$= \frac{875}{250} \\= \frac{175}{50} \\= \frac{35}{10} \\= 3.5$

6 0

3 years ago

What unit is used for atomic mass

kicyunya [14]

Answer:

universal mass unit

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The universal mass unit, abbreviated u (sometimes amu for atomic mass unit), is defined as one-twelfth of the mass of the 12C atom which has been defined to be exactly 12 u. The absolute mass of a 12C atom is obtained by dividing the value 12 by the Avogadro number (NA = 6.022 137 × 1023).

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3 years ago

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