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3 years ago

W do I find the family # and the period # for aluminum on the periodic table

Chemistry

1 answer:

Sati [7]3 years ago

3 0

Answer:

Aluminum is the 13th element on the periodic table. It is located in period 3 and family 13.

Explanation:

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Give the chemical symbol of an element in the third period (row) of the periodic table with four 3p electrons.

Ann [662]

Answer: The chemical symbol of the element is Sulfur.

Explanation:

The element which is present in third period of the periodic table having four 3p electrons is Sulfur. Sulfur is the 16th element of the periodic table which has 6 valance electrons.

The electronic configuration of this element is: $[Ne]3s^23p^4$

This element is considered as a non-metal because it will accept electrons in order to attain stable electronic configuration.

Hence, the chemical symbol of the element is Sulfur.

7 0

2 years ago

Which of the following molecules are ionic?

kkurt [141]

1st one is E
2nd one is also E

6 0

2 years ago

Read 2 more answers

HURRY PLEASE!!!!!!!!!!!!!!!!!!!!!!!!!!!!

aivan3 [116]

Answer:

When a scientist on Earth drops a hammer and a feather at the same time an astronaut on the moon drops a hammer and a feather, the result expected is that the hammer hits the ground before the feather on Earth, and the hammer and feather hit at the same time on the moon (option D).

Explanation:

In the abscence of atmosphere (vacuum), the objects fall in free fall. This is, the only force acting on the objects is the gravitational pull, which is directed vertlcally downward.

Under such absecence of air, the equations that rules the motion are:

V = Vo + gt
d = Vo + gt² / 2
Vf² = Vo² + 2gd

As you see, all those equations are independent of the mass and shape of the object. This explains why when an astronaut on the moon drops a hammer and a feather at the same time, the hammer and feather hit at the same time on the moon, a space body where the gravitational attraction is so small (approximately 1/6 of the gravitational acceleration on Earth) that does not retain atmosphere.

On the other hand, the air (atmosphere) present in Earth will exert a considerable drag force on the feather (given its shape and small mass), slowing it down, whereas, the effect of the air on the hammer is almost neglectable. In general and as an approximation, the motion of the heavy bodies that fall near the surface is ruled by the free fall equations shown above, so, the result that is expected when a scientist on Earth drops a hammer and a feather at the same time is that the hammer hits the ground before the feather.

8 0

3 years ago

Read 2 more answers

Surface tension ________________________.

Alex73 [517]

C) is higher for nonpolar substances than for polar ones

6 0

3 years ago

Glucose (C6H12O6) can be fermented to yield ethanol (CH3CH2OH) and carbon dioxide (CO2). C6H12O6⟶2CH3CH2OH+2CO2 The molar mass o

jekas [21]

Answer:

The % yield is 74.45 %

Explanation:

Step 1: The balanced equation

C6H12O6⟶2CH3CH2OH+2CO2

Step 2: Data given

Molar mass glucose = 180.15 g/mol

Molar mass of ethanol = 46.08 g/mol

Molar mass of carbon dioxide = 44.01 g/mol

Mass of glucose = 61.5 grams

Mass of ethanol = 23.4 grams

Step 3: Calculate moles of glucose

Moles glucose = Mass glucose / Molar mass of glucose

Moles glucose = 61.5 grams / 180.15 g/mol

Moles glucose = 0.341 moles

Step 4: Calculate moles of ethanol

1 mole of glucose consumed, produces 2 moles of ethanol and 2 moles of CO2

0.341 moles of glucose, will produce 2*0.341 = 0.682 moles of ethanol

Step 5: Calculate mass of ethanol

Mass ethanol = moles ethanol * Molar mass ethanol

Mass ethanol = 0.682 moles * 46.08 g/mol

Mass ethanol = 31.43 grams = theoretical mass

Step 6: Calculate % yield

% yield = actual mass / theoretical mass

% yield = (23.4 grams / 31.43 grams) * 100%

% yield = 74.45 %

The % yield is 74.45 %

7 0

3 years ago