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yarga [219]
3 years ago
9

A pacemaker:

Chemistry
1 answer:
inna [77]3 years ago
8 0
Answer: D. Sends small electrical impulses to the heart, causing it to beat more

Explanation: A pacemaker is implanted in the chest and helps to treat abnormal heart rhythms especially those causing your heart to skip beats or beat too slow.
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Use lewis structures to explain why br3- and i3- are stable, while f3- is not
MAXImum [283]

If you sketch a Lewis dot structure of I3-, you'll perceive that the center I atom formulates two bonds, and also has three non-bonding pairs of electrons. That's an over-all of five electron pairs - beyond an octet. Lots of compounds disrupt the octet rule that means, but the first long-row elements like F can't because the lower elements like iodine can use an obtainable d-orbital to house the additional pair of electrons (sp3d hybridization), but F just doesn't have a d-orbital that it can use.

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4 0
3 years ago
Of the following<br> is not soluble in water<br> KOH<br> НСІ<br> NaBr<br> CaCO3<br> KI
Mariulka [41]

Answer:

ki

Explanation:

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3 years ago
What characteristic do all parts of the electromagnetic spectrum have in common
Elza [17]
All electromagnetic waves are amplitude, a characteristic frequency and wavelength, and the ability to travel through a vacuum at the same speed (the speed of light)
5 0
3 years ago
(b) Which of the following is a mixture?
bija089 [108]

Answer:

a

Explanation:

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3 years ago
Describe the buffer capacity of the acetic acid buffer solution in relation to the addition of both concentrated and dilute acid
frosja888 [35]

Answer:

The more concentrated acetic acid buffer has a better buffer capacity because requires more moles of acid or base to change the pH than a more diluted acetic acid buffer.

Explanation:

Buffer capacity is defined as the moles of an acid or base that are needed to change the pH of a buffer in 1 unit.

A more concentrated solution of acetic buffer contains more moles of the acid per liter of solution. A solution that contains more moles of the acetic ion or the acetic acid requires more moles of base or acid to change the pH, that means:

The more concentrated acetic acid buffer has a better buffer capacity because requires more moles of acid or base to change the pH than a more diluted acetic acid buffer.

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