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Aleks04 [339]
3 years ago
13

Element 'X' forms a chloride with the formula XCl2, which is a solid with high melting point. X would most likely be in the same

group of the periodic table as:
I) Si
2) Al
3) Mg
4) Na



pls pls answer fast ​
Chemistry
1 answer:
notka56 [123]3 years ago
8 0

Answer:

Mg

Explanation:

Mg forms 2+ ions and mgcl2 has a melting point over 700°C I believe.

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Remember, 1 mole= 6.022x10^23 atoms, molecules, or formula units.

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7 0
3 years ago
Ba(NO3)2<br> What’s the atomic mass
Ahat [919]

Answer:

261.337 g/mol

Explanation:

3 0
3 years ago
I need help pls, and fast.
Vadim26 [7]

Answer:

1) Liquid forms drops that are dome-shaped

2) low surface tension

3) low viscosity

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Explanation:

It makes sense just use the stuff that's already in the table. It usually works.

7 0
3 years ago
if 11.74 liters of gas at STP are pumped into a basketball, how many moles of gas are in the basketball? assume the basketball w
ser-zykov [4K]

Answer:

0.52 mol

Explanation:

Using the general gas equation formula:

PV = nRT

Where;

P = pressure (atm)

V = volume (Liters)

n = number of moles (mol)

R = gas law constant (0.0821 Latm/molK)

T = temperature (K)

At STP (standard temperature and pressure), temperature of a gas is 273K, while its pressure is 1 atm

Using PV = nRT

n = PV/RT

n = (1 × 11.74) ÷ (0.0821 × 273)

n = 11.74 ÷ 22.41

n = 0.52 mol

There are 0.52 moles in the basketball

6 0
3 years ago
The factor that is changed throughout an experiment is called the _______. A. apparatus B. constant C. variable D. hypothesis
ser-zykov [4K]
The variable is what changes during an experiment. Hopefully this helped! :)
4 0
3 years ago
Read 2 more answers
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