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3 years ago

What 2 elements are in the same group?

Chemistry

2 answers:

Irina-Kira [14]3 years ago

7 0

Answer:

Chlorine and Bromine are in the same group

Lesechka [4]3 years ago

6 0

Answer:

I think fluorine and neon

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Compare the type of change that occurs when an iron bar rusts and when a substance freezes.

Ivanshal [37]

Explanation:

when an iron bar rust is an example of a chemical change in which a new substance is formed and the change is not easily reversible.for iron to rust moisture and air must be present.while when a substance freezes,it can be easily reversed through melting and no new substance is formed.this change is termed a physical change.

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2 years ago

Which radioactive emission has the smallest (least) mass? Question options:

Tems11 [23]

Answer:

The answer is D. gamma rays

Explanation:

A radioactive atom can have three different types of emission:

alpha particles (α) = they have a mass of 4 amu and they have a very low penetrating power.

Beta particles (β) = they have 5x $10^{-4}$ amu and they have an intermediate penetrating power

Gamma rays (γ) = they are not particles basically just energy so its mass is ≈ 0 and its penetrating power is higher

For this reason Gamma emissions (γ) has the smallest mass value.

8 0

3 years ago

The electron configuration below applies to which element? 1s2 2s2 2p6 3s2 3p1

zvonat [6]

Aluminum! hope this helps

6 0

3 years ago

Calculate the number of Carbon atoms in 1.50g of C6H12O6

Whitepunk [10]

Answer:

3.01 ·10↑22

Explanation:

First you want to convert the grams of Glucose to moles of Glucose.

$\frac{1.5 grams of glucose}{180.15588grams/molesglucose} =.008326 Moles of Glucose$

Next find the formula units of glucose.

.008326Moles of Glucose · 6.022 · 10↑23Forumula Units*Moles↑-1 =

5.01 ·10↑21 Formula Units of Glucose

Now multiply the formula units of glucose by the amount of each element in the molecule.

So for Carbon:

6carbon · 5.01 · 10↑21 = 3.01 · 10↑22

(please mark as Brainliest)

4 0

3 years ago

Read 2 more answers

Why did you have to remove co2 from your partially neutralized stomach acid before the titration?

shutvik [7]

Answer is: carbon dioxide (CO₂) can affect the end point of the titration.

Carbon dioxide, or carbon(IV) oxide, reacts with water and form carbonic acid, which can affect the end point of the titration, because more base is needed for neutralization of partially neutralized stomach acid.

Balanced chemical reaction of carbon dioxide and water: CO₂ + H₂O → H₂CO₃.

8 0

3 years ago