Which of these elements is an alkaline earth metal? a. potassium (k) b. calcium (ca) c. chromium (cr) d. gallium (ga)

Hey there!

Your answer is:

B) Calcium (Ca)

C. Calcium (Ca)

Explanation:

Hello,

In this case, alkaline earth metals are known by their capacity to form basic solutions when reacted with water as well as alkalies. They are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba) and radium (Ra) and they have the capacity to react quickly by forming ions by giving electrons. In such a way, the correct option is C. Calcium (Ca).

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you need to give more information

in the given question, the partial pressure is calculated by using the ideal gas equation, that is, pv = nrt

here, p is pressure, v is volume = 25 l, n is number of moles = 0.0104 moles, r is gas constant = -0.0821 l.atm / mol.k

t is temperature = 273 k

p = nrt / v

p = (0.0104 mol × 0.0821 l.atm / mol.k × 273 k) / 25 l

= 0.0093 atm