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3 years ago

What is khasra record? What it tells?

Chemistry

2 answers:

AnnZ [28]3 years ago

8 0

Answer:

The Khasra record of the Patwari gives information regarding the map of land. It identifies which plot of land is owned by whom.

Explanation:

Andreas93 [3]3 years ago

6 0

Answer:

Khasra is a register of land records maintained by the Patwari. It contains the details of the crops grown and the harvest inspections done by the Patwari in the village.

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which elements are likely to have a larger atomic radius than silicon (Si).aluminum (Al)carbon (C)sulfur (S)tin (Sn)

dimulka [17.4K]

D.) Tin (Sn) are likely to have a larger atomic radius than silicon....

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3 years ago

Based on the following reaction, determine how much heat is released if 500. grams of methane is combusted in excess oxygen: CH4

EastWind [94]

Answer:

- 13,150.6kJ

Explanation:

CH4 + 2 O2 ------> CO2 + 2 H2O ΔH= – 890 kJ

The ΔH is enthalpy change of combustion , which is the heat is either absorbed or released by the combustion of one mole of a substance.

ΔH=−890 kJ/mol (released in the combustion of one mole of methane)

using the molar mass (in grams )of methane to get moles of sample

(237g × 1 mole of CH4)/16.04g=14.776 moles of CH4

Since 1 mole produces 890 kJ of heat upon combustion, then 14.776 moles will produce

ΔH = 14.776moles of CH4 × 890kJ/1mole of CH4

=13,150.6kJ

Therefore ΔH = - 13,150.6kJ

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3 years ago

C,H. + 020 H2O + CO2<br> How many grams of O, are needed to<br> combust 55.0 grams of CHỞ?

Studentka2010 [4]

Well what do youmean?

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3 years ago

True or False. Index Fossils are formed from organisms that were alive for short period of geologic time, are extinct, had hard

NemiM [27]

Answer:

Index fossil, any animal or plant preserved in the rock record of the Earth that is characteristic of a particular span of geologic time or environment.

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3 years ago

Read 2 more answers

The burning of magnesium is a highly exothermic reaction. How many kilojoules of heat are released when 0. 75 mol of Mg burn in

alexandr402 [8]

Taking into account the definition of enthalpy of a chemical reaction, the quantity of heat released when 0.75 moles of Mg are burned is 451.5 kJ.

<h3>Enthalpy of a chemical reaction</h3>

The enthalpy of a chemical reaction is known as the heat absorbed or released in a chemical reaction when it occurs at constant pressure. That is, the heat of reaction is the energy that is released or absorbed when chemicals are transformed into a chemical reaction.

The enthalpy is an extensive property, that is, it depends on the amount of matter present.

<h3>Heat released in this case</h3>

In this case, the balanced reaction is:

2 Mg(s) + O₂ (g) → 2 MgO(s) + 1204 kJ

This equation indicates that when 2 moles of Mg reacts with 1 mole of O₂, 1204 kJ of heat is released.

When 0.75 moles of Mg are burned, then you can apply the following rule of three: if 2 moles of Mg releases 1204 kJ of heat, 0.75 moles of Mg releases how much heat?

$heat=\frac{0.75 moles of Mgx1204 kJ}{2 moles of Mg}$

Finally, the quantity of heat released when 0.75 moles of Mg are burned is 451.5 kJ.

Learn more about enthalpy of a chemical reaction:

<u>brainly.com/question/15355361</u>

<u>brainly.com/question/16982510</u>

<u>brainly.com/question/13813185</u>

<u>brainly.com/question/19521752</u>

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2 years ago