2 years ago

When determining an element's identity, what is the most important subatomic part to examine?

1 answer:

5 0

D protons. the identity of an element is determined by the total number of protons present in the nucleus of an atom contained in that partial element.
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How does organic matter help soil?

sergeinik [125]

Answer:

Explanation:

the rain does help the soli it can make bacteria

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2 years ago

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Why does a plastic bottle is sealed at a high altitude change it’s shape when it is taken to low altitude

nadya68 [22]

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The bonds between the molecules of the plastic bottle become weaker as the altitude decreases.

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3 years ago

How many moles are in 17.2g k2s

Natalija [7]

Answer: 0.156 mol

Explanation:

To find the moles of 17.2 g K₂S, we need to know the molar mass to convert.

$17.2g*\frac{mol}{110.256 g} =0.156 mol$

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3 years ago

A 5.00-g sample of copper metal at 25.0 °C is heated by the addition of 133 J of energy. The final temperature of the copper is

vekshin1

Answer: The final temperature of the copper is 95°C.

Explanation:

To calculate the final temperature for the given amount of heat absorbed, we use the equation:

$Q= m\times c\times \Delta T$

Q = heat absorbed = +133 J (heat is added to the system)

m = mass of copper = 5.00 g

c = specific heat capacity of copper = 0.38 J/g ° C

$\Delta T={\text{Change in temperature}}=T_2-T_1$

$T_1=25^oC$

Putting values in above equation, we get:

$+133J=5.00g\times 0.38J/g^oC\times (T_2-25)\\\\T_2=95^oC$

Hence, the final temperature of the copper is 95°C.

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2 years ago

Please help , science tho. by the way i have to do 5

kap26 [50]

Answer:

850

Explanation:

It's between 840 and 860

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2 years ago