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1 year ago

What is the answer to “An element is:”

Chemistry

2 answers:

Jobisdone [24]1 year ago

8 0

A. A pure chemical substance consisting of one type of atom

arlik [135]1 year ago

3 0

Answer:

Option A

A pure chemical substance consisting of one type of atom.

Explanation: An element is a pure substance and is made of only one type of atom; it cannot be broken down into a simpler substance.

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Which of the following words mean ä substance formed by chemically combining two or more elements

kogti [31]

Answer:

B. Compound

Explanation:

Hope I helped

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2 years ago

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Which step will decrease the pressure of a gas inside a closed cubical container? increasing the number of moles of gas decreasi

Jobisdone [24]

Answer: Decreasing the temperature inside the container will decrease the pressure of a gas inside a closed cubical container.

Explanation:

According to Gay-Lussac's Law : 'The pressure of the gas increases with increase in temperature of the gas when volume of the gas is kept constant'.

$(Pressure)\propto (Temperature)$

At constant volume, pressure of the gas will decrease on decreasing the temperature or vice versa.

Decreasing the temperature inside the container will decrease the pressure of a gas inside a closed cubical container.

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2 years ago

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State with reasons, whether sulphur dioxide is acting as an oxidizing agent or a reducing agent in each of the following reactio

evablogger [386]

Answer:

A) oxidizing agent is SO2

B) NaClO is the oxidizing agent

Explanation:

A) This is a redox reaction in which oxidation and reduction occur simultaneously.

Thus, in 2H2S(g) + SO2(g) -> 2H2O(l) + 3S(s);

H2S is reduced as follows;

H2S → S + 2H+ + 2e−

We can see that SO2 has been reduced while H2S gets oxidized since it has changed state from - 2 to 0 . Thus sulphur dioxide is the oxidizing agent.

B) SO2(g) + H2O(l) + NaClO(aq) -> NaCl(aq) + H2SO4(aq)

In this, SO2 undergoes oxidation and NaClO is the oxidizing agent

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2 years ago

Andrew drew this diagram to show a certain type of weather front. Which type of front is it?

jolli1 [7]

Where is the diagram then I will be able to answer

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If 125 gram of 75% pure Caco3 is treated with 100 gram of Hcl to produce Cacl2 H20 and Co2 Find which one is limiting reactant

damaskus [11]

Answer:

Explanation:

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2 years ago