3 years ago

What is common to all elements in the same group on the periodic table? Their properties are very different.

Chemistry

2 answers:

Mrac [35]3 years ago

7 0

Hello,

B.They have the same number of valence electrons.

sattari [20]3 years ago

7 0

B. They have the same number of valence

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C i think i got this off of usa test prep in class

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0.750mol of gas are stored in a tank at a pressure of 275kpa and a temperature of 0.00 degrees * C What is the volume of the tan

nordsb [41]

Answer:

The volume on the tank is 6, 20 L

Explanation:

We use the formula PV=nRT. We convert the units of pressure in kPa into atm and temperature in Celsius into Kelvin:

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3 years ago

A chemist mixes 75.0 g of an unknown substance at 96.5°C with 1,150 g of water at 25.0°C. If the final temperature of the system

AleksAgata [21]

To do this problem it is necessary to take into account that the heat given by the unknown substance is equal to the heat absorbed by the water, but considering the correct sign:

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Clearing the specific heat of the unknown substance:

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3 years ago

HELPPP

maxonik [38]

1 endothermic 2 yes and exothermic 3 endothermic

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3 years ago