Answer: option C) Na, Mg, K
Explanation:
Similar chemical properties are expressed by elements found in the same or close groups. There are Seven (7) groups in the Periodic table.
Of all the options, ONLY sodium Na, Magnesium Mg, and Potassium K, are located in closely together with SODIUM and MAGNESIUM being in the Same period, while SODIUM and POTASSIUM are placed in the same Group 1.
Therefore, Na, My, and K are most similar in chemical properties
This should help you with your question:
Gravitational pull = 9.8 m/s^2
1/2 x 9.8 x 7^2 = 240.1 m
The rock has fallen 240.1 m.
I cannot help you with the rest, but this should give you a headstart.
Answer:
125 L of 15% and 265.625 L of 65% HCl
Explanation:
let x = volume of 15% HCl, y = 65% HCl
15x + 65y = 49 × 390.625
15x + 65y = 19140.625
x + y = 390.625
x = 390.625 - y
substitute for x in equation 1
15 (390.625 - y) + 65y = 19140.625
5859.375 - 15 y + 65 y = 19140.625
50 y = 19140.625 - 5859.375 = 13281.25
y = 132181.25 / 50 = 265.625 L
X = 390.625 - y = 390.625 - 265.625 = 125 L
Answer:
Volcanic eruption
Explanation:
a crater is this bowl shaped hole in the ground, and it is caused by a meteorite or volcanic activity
Answer:
117 millimeters = 0.117 meters
Explanation:
This is using unit conversions. There are 1000 millimeters in 1 meter, so you would divide your starting value, 117 millimeters by 1000 millimeters. The units will cancel because they are being divided by themselves and you are left with 0.117 meters.