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Tpy6a [65]
3 years ago
12

Which element is the most reactive element in group one of the periodic table

Chemistry
1 answer:
Bad White [126]3 years ago
4 0

Answer:

Li

Explanation:

According to periodic table, lithium will be the most reactive element because reactivity decreases down the group

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You add 50.0 g of ice initially at ‒20.0 °C to 1.00 x 102 mL warm water at 67.0 °C. When all the ice melts, the water temperatur
xxTIMURxx [149]

Answer:

T_2=17.8\°C

Explanation:

Hello,

In this case, we can solve this problem by noticing that the heat lost by the warm water is gained by the ice in order to melt it:

Q_{water}=-Q_{ice}

In such a way, the cooling of water corresponds to specific heat and the melting of ice to sensible heat and specific heat also that could be represented as follows:

m_{water}Cp_{water}(T_2-T_{water})=-m_{ice}\Delta H_{melting,ice}-m_{ice}\Cp_{ice}(T_2-T_{ice})

Thus, specific heat of water is 4.18 J/g°C, heat of melting is 334 J/g and specific heat of ice is 2.04 J/g°C, thus, we can compute the final temperature as shown below:

m_{water}Cp_{water}(T_2-T_{water})+m_{ice}Cp_{ice}(T_2-T_{ice})=-m_{ice}\Delta H_{melting,ice}\\\\T_2=\frac{-m_{ice}\Delta H_{melting,ice}+m_{water}Cp_{water}T_{water}+m_{ice}Cp_{ice}T_{ice}}{m_{water}Cp_{water}+m_{ice}Cp_{ice}} \\\\T_2=\frac{-50.0*334+100*4.18*67+50.0*2.04*-20.0}{100*4.18+50.0*2.04} \\\\T_2=17.8\°C

Best regards.

3 0
3 years ago
Thermal decomposition of magnesium nitrate and magnesium hydroxide <br><br>​
iragen [17]

Explanation:

hope it will help you. Wishing a nice day. enjoy with your answer

8 0
3 years ago
Which atomic orbitals overlap to form the carbon-carbon σ and π bonding molecular orbitals of ethene, H2C=CH2?
Zanzabum

Answer:

σ -> 2sp²

π -> 2p

Explanation:

The carbon has valence shell 2s 2p, and, both of them make 3 σ bonds and 1 π bond. The π bond only occurs in multiple bonds.

The σ bonds happen at the hybrids orbitals, which are orbitals formed by the association of the pure orbitals (s, p, d, f). The hybridization occurs to make possible to the atom to do the bonds because the electrons need to be isolated in it.

On the other hand, the π bonds only occur at pure orbitals. The subshell s only has 1 orbital, and the subshell p has 3 orbitals. So, because there are 3 σ bonds, it's necessary 3 hybrids orbitals (1 of s + 2 of p).

The σ bonds happen at the orbital 2sp² and the π bond at the 2p pure orbital.

5 0
3 years ago
The compound 2,2-dimethylpentane has several structural isomers. how many of the isomers are straight-chained?
neonofarm [45]
The answer Is (1)...Straight Isomer when you put them together.





Hope that helps!!!
8 0
3 years ago
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Three isotopes of argon occur in nature. Calculate the average atomic mass of argon given the following relative atomic masses a
Volgvan

Answer:

whats the question

Explanation:

6 0
3 years ago
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