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Degger [83]
3 years ago
10

Xiang has created an email that contains a number of acronyms and proper nouns. He would like to use Spell Checker quickly witho

ut modifying these entries or being notified for successive use of the same word or phrase.
Which option should he choose in the Spell Checker?

Ignore Once
Ignore All
Change Once
Change All
Chemistry
2 answers:
user100 [1]3 years ago
6 0
Hey hi tygehyvdcercrcrgwgwv
Neko [114]3 years ago
6 0

Answer:

ignore all

Explanation:

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Uranium-238 had a half life of 4.5 billion years. A 100 g sample of U-238 has decayed until only 25 g remain. How long did it ta
Natasha2012 [34]

awnseris chemical hhhh Explanation:

6 0
3 years ago
write a chemical equation that represents baking soda (NaHCO3) reacts with hydrochloric acid (HCI) to produce sodium chloride, w
swat32

Answer:

NaHCO3 + HCl = NaCl + H2O + CO2

Explanation:

The total number of atoms of each element on either side of the equation must be equal.

7 0
3 years ago
Balance the following equations:
Brilliant_brown [7]

Answer:

1) 0 C2H4O2 + 0 O2 -> 0 CO2 + 0 H2O (balanced)

2) V2O5 + CaS -> CaO + V2S5

<em>just additional info: V2O5 </em><em>is</em><em> </em><em>divanadium</em><em> </em><em>pentaoxide</em>

LHS (Left hand side)

V: 2

O: 5

Ca: 1

S: 1 x 5 [to balance with the right hand side of the equation]

RHS (Right hand side)

V: 2

O: 1 x 5 [to balance with the left hand side of the equation]

Ca: 1

S: 5

When you balance any elements, you have to balance the whole chemical compound.

Thus,

V2O5 + <em><u>5</u></em> CaS -> <em><u>5</u> CaO</em> + V2S5

LHS CHECK:

V: 2

O: 5

Ca: 5

S: 5

RHS CHECK:

V: 2

O: 5

Ca: 5

S: 5

3) S8 + O2 -> SO2

LHS:

S: 8

O: 2

RHS:

S: 1 x 8 [to balance with LHS]

O: 2

When you balance any elements, you have to balance the whole chemical compound.

S8 + O2 -> <em><u>8</u></em><em><u> </u></em>SO2

When we add 8 to the RHS, it gives us 8S, 16 O.

In order to balance that into the RHS, I need to multiply the O2 by 8, which will give 8(O2) = 16 O particles.

Therefore, <em><u>S8</u></em><em><u> </u></em><em><u>+</u></em><em><u> </u></em><em><u>8</u></em><em><u> </u></em><em><u>O2</u></em><em><u> </u></em><em><u>-</u></em><em><u>></u></em><em><u> </u></em><em><u>8</u></em><em><u> </u></em><em><u>SO2</u></em><em><u> </u></em><em><u>is</u></em><em><u> </u></em><em><u>the</u></em><em><u> </u></em><em><u>final</u></em><em><u> </u></em><em><u>answer</u></em><em><u> </u></em><em><u>for</u></em><em><u> </u></em><em><u>(</u></em><em><u>3</u></em><em><u>)</u></em><em><u>.</u></em>

6 0
3 years ago
Over long periods of time, the climate of an area can change. Which of these can cause a change in climate?
Pie

Answer:

You didnt give use the choices you have but I can try to help. Climate can change when it snows,rains,when it is sunny,or cloudy.

Explanation:

The rain allows the climate to cool down depending in the weather out. Same with cloudy weather. Snow can also cause temperature to drop down. When it is sunny, the climate in the sun will be warm, until getting in the shade and it gets cold again.

4 0
2 years ago
Moles that do not form in usual fashion and may undergo transformation to become melanomas are called
Stolb23 [73]

Answer:

Dysplastic nevi

Explanation:

4 0
3 years ago
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