Elements from which two groups in the periodic table would most likely combine with each other to form an ionic compound?

Chemistry

1 answer:

LUCKY_DIMON [66]3 years ago

7 0

Group 1 and 2 with 7 and 0

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How much heat is required to vaporize 25g of water at 100*c

ElenaW [278]

Answer:

Heat required = 13,325 calories or 55.75 KJ.

Explanation:

To convert a water to steam at 100 degree celsius to vapor, we have to give latent heat of vaporization to water

Which equals ,

Q = mL,

Where, m is the mass of water present

L = specific latent heat of vaporization

Here , m= 25 gram

L equals to 533 calories (or 2230 Joules)

So, Q = 25×533 = 13,325 Calories

Or , Q = 55,750 Joules = 55.75 KJ

so, Heat required = 13,325 calories or 55.75 KJ.

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Which characteristic of water helps it form droplets?

inessss [21]

Answer: C. High surface tension

Explanation:

Water has high specific heat as it require high heat to raise the temperature of 1 g of water through $1^0C$ .

Surface tension is the net downward force acting on the surface of liquids due to the cohesive nature of liquids.

Water molecules are bonded by strong hydrogen bonding between the hydrogen atom and the electronegative oxygen atom making it polar. Thus water molecules present on the surface are strongly attracted by the molecules present below the surface and thus act as a stretched membrane.

The surface acquires a minimum surface are and thus acquire a spherical shape.

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Write balanced equation of carbon burning in air

Ne4ueva [31]

Answer:

When carbon is burned in air, it forms carbon dioxide gas and releases a large amount of heat and some light:

C+O2= CO2+ heat+ light

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