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alina1380 [7]
4 years ago
7

If an atom loses two electrons what charge will it have ? +2 -1 +1 -2

Chemistry
1 answer:
Citrus2011 [14]4 years ago
6 0

Answer:

+2

Explanation:

Because an electron has a negative charge.

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What is the pH of a solution after the addition of 30.0 mL of 0.100 M NaOH to 50.0 mL of 0.10 M HBr?
Pani-rosa [81]

Answer:

pH = 1.6

Explanation:

  • HBr + NaOH ⇒ NaBr + H2O

0 mL NaOH:

  • HBr ↔ H3O+  +  Br-

⇒ [ H3O+] = M HBr = 0.1 M

⇒pH = -log [H3O+] = 1

30 mL NaOH:

⇒ mol NaOH = 0.1 mol / L * 0.03 L =  3 E-3 mol

⇒ mol HBr = 0.05 L * 0.1 mol/L = 5 E-3 mol

⇒ M HBr = ( 5 E-3 mol - 3 E-3 mol) / 0.08 L = 0.025 M

⇒ pH = - log (0.025) = 1.6

7 0
3 years ago
Which of the following is not a landform?<br> A. Canyon<br> B. Plateau<br> C. Bay<br> D. Earthquake
kaheart [24]
D. Earthquake

This is because all the others are landforms.
5 0
3 years ago
ASAP
raketka [301]

Answer:

84%

Explanation:

2100 j out   /   2500 j in  =  .84 = 84%

7 0
2 years ago
Draw the most stable conformation of 3-isopropyl-1,1dimethylcyclohexane Please show me which one is the isopropyl and the dimeth
Andrei [34K]

The most stable conformation of 3-isopropyl-1,1dimethylcyclohexane equatorial ethyl group (more stable).  The stability of ethylcyclohexane's equatorial conformer exceeds that of its axial conformer by 7.4 kJ/mol.

According to the previous section, the chair conformation with the equatorial methyl group is more stable because it reduces steric repulsion, and as a result, the equilibrium favors the more stable conformer. Strongly favoring the equatorial shape is methylcyclohexane. The methyl group is in close proximity to the axial hydrogens in the axial conformation, which has an energetically unfavorable effect known as a 1,3-diaxial interaction. The methyl group prefers the equatorial shape as a result.  The conformation of ethylcyclohexane in which the ethyl group is in the equatorial position is the most stable.

Learn more about equatorial ethyl group here:

brainly.com/question/24153313

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7 0
1 year ago
8)How many grams are in 0.02 moles of beryllium iodide, BeI2?
n200080 [17]

Answer:

0.03:---$7--$-$7$--$-$-$$-$+-$$7-$$-$7-$8$+$-$

4 0
4 years ago
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