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SSSSS [86.1K]
3 years ago
12

HURRY ⚠️ How many Chlorine atoms in 2HCI? Hiw many Hydrogen atoms are in 2HCl?

Chemistry
2 answers:
slega [8]3 years ago
5 0

Answer:

2 in each

Explanation:

tresset_1 [31]3 years ago
5 0
Two in each one true 2 in front acts the same as a subscript except it applies to the whole equation.
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Drinking water may contain a low concentration of lead ion (Pb2 ) due to corrosion of old lead pipes. The EPA has determined tha
Lynna [10]

Answer:

3.861x10⁻⁹ mol Pb⁺²

Explanation:

We can <u>define ppm as mg of Pb²⁺ per liter of water</u>.

We<u> calculate the mass of lead ion in 100 mL of water</u>:

  • 100.0 mL ⇒ 100.0 / 1000 = 0.100 L
  • 0.100 L * 0.0080 ppm = 8x10⁻⁴ mg Pb⁺²

Now we <u>convert mass of lead to moles</u>, using its molar mass:

  • 8x10⁻⁴ mg ⇒ 8x10⁻⁴ / 1000 = 8x10⁻⁷ g
  • 8x10⁻⁷ g Pb²⁺ ÷ 207.2 g/mol = 3.861x10⁻⁹ mol Pb⁺²
4 0
3 years ago
Which of the pollowing is
34kurt

Answer:

At transform plate boundaries, two plates move in opposite direction. Transform faults are the site of massive earthquakes. The San Andreas Fault is the boundary between the Pacific and North American plates.

6 0
2 years ago
When a substance dissociates into OH- ions, they are classified as ________ ?
djyliett [7]
When a substance dissociates into OH- ions, they are classified as bases.
4 0
2 years ago
ASAP
Oksanka [162]

Answer:

Answer B

Explanation:

By definition mixtures are combinations of substances physically prepared and physically separated. Mixtures are classified as 'homogeneous mixtures' and 'heterogeneous mixtures'. For homogeneous mixtures all components are dissolved, with solute evenly distributed throughout the solution and assumes state of solvent. 'Heterogeneous mixtures' have inconsistent properties throughout and solute concentration is not consistent throughout the mixture.

6 0
2 years ago
Use the element symbols to write the electronic configuration Na
Fofino [41]
Electron Configuration is the distribution of electrons of an atom or molecule in an atomic or molecular orbitals.

So Na, or Sodium has 11 electrons, so the number should add up to 11

Na: 1s² 2s² 3p⁶ 3s¹

Hope this helps!
8 0
3 years ago
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