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3 years ago

Which metalloid is often found in microchips, semiconductors, and sand?a. boron b. arsenic c. germanium d. silicon

Chemistry

2 answers:

elena-14-01-66 [18.8K]3 years ago

5 0

Answer:

silicon

Explanation:

Silicon. Silicon is often found in electronic devices, as well as the sand.

hope this helps UwU

aleksandr82 [10.1K]3 years ago

4 0

Answer:

silicon

Explanation:

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The temperature of 500 mL of water is 16°C what happens to the water when thermal energy is transferred to it

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The temperature of the water increases because the average

kinetic energy of the water molecules increases.Explanation:

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3 years ago

What change would shift the equilibrium system to the left?

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Answer:

Adding more of gas C to the system

Explanation:

Le Châtelier's principle states that when there is an dynamic equilibrium, and this equilibrium is disturbed by an external factor, the equilibrium will be shifted in the direction that can cancel the effect of the external factor to reattain the equilibrium.

1) Adding more of gas C to the system:

Adding more C gas will increase the concentration of the products side. So, the reaction will be shifted to the left to attain the equilibrium again.

2) Heating the system:

Heating the system will increase the concentration of the reactants side as the reaction is endothermic. so, the reaction will be shifted to the right to attain the equilibrium again.

3) Increasing the volume:

has no effect since the no. of moles of gases is the same in both reactants and products sides.

4) Removing some of gas C from the system:

Removing some of gas C from the system will decrease the concentration of the products side. So, the reaction will be shifted to the right to attain the equilibrium again.

So, the right choice is: Adding more of gas C to the system.

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3 years ago

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After Frank Palko was sentenced to death by the state of Connecticut, the Supreme Court ruled that

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The answer is "his conviction and execution should be upheld". Frank Palko was first charged with murder and claimed that Connecticut violated the Double Jeopardy Clause of the Fifth Amendment. The fifth amendment states that "there must be no person to be put twice in jeopardy of life and limb" so this was the violation the court made after they charge him with murder for the second time. That's why when the second trial was made,he was sentenced to by the Supreme court which decided that he should be executed and convicted because of the evidences found.

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3 years ago

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Write the condense structural formula of the following compounds.

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A condensed structural formula is a simple way of representing organic compounds.

The given organic compounds and condensed structural formula is presented below;

The condense structural formula of alkene 2,7 Undecadiene with molecular formula C₁₁H₂₀ is in the image uploaded.
The condense structural formula of 2,8 Nonene with the molecular formula C₉H₁₈ is in the image uploaded.
The condense structural formula of 5 Decyne with the molecular formula C₁₀H₁₈ is in the image uploaded.

Learn more about structural formula here: brainly.com/question/514499

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3 years ago

A hydrocarbon is burnt completely to give 3.447g of

goblinko [34]

Answer: The empirical formula for the given compound is $CH_2$

Explanation:

The chemical equation for the combustion of compound having carbon, hydrogen, iron and oxygen follows:

$C_xH_y+O_2\rightarrow CO_2+H_2O$

where, 'x' and 'y' are the subscripts of carbon and hydrogen respectively.

We are given:

Mass of $CO_2=3.447g$

Mass of $H_2O=1.647g$

We know that:

Molar mass of carbon dioxide = 44 g/mol

Molar mass of water = 18 g/mol

For calculating the mass of carbon:

In 44g of carbon dioxide, 12 g of carbon is contained.

So, in 3.447 g of carbon dioxide, $\frac{12}{44}\times 3.447=0.940g$ of carbon will be contained.

For calculating the mass of hydrogen:

In 18g of water, 2 g of hydrogen is contained.

So, in 1.647 g of water, $\frac{2}{18}\times 1.647=0.183g$ of hydrogen will be contained.

To formulate the empirical formula, we need to follow some steps:

Step 1: Converting the given masses into moles.

Moles of Carbon = $\frac{\text{Given mass of Carbon}}{\text{Molar mass of Carbon}}=\frac{0.940g}{12g/mole}=0.0783moles$

Moles of Hydrogen = $\frac{\text{Given mass of Hydrogen}}{\text{Molar mass of Hydrogen}}=\frac{0.183g}{1g/mole}=0.183moles$

Step 2: Calculating the mole ratio of the given elements.

For the mole ratio, we divide each value of the moles by the smallest number of moles calculated which is 0.0783 moles.

For Carbon = $\frac{0.0783}{0.0783}=1$

For Hydrogen = $\frac{0.183}{0.0783}=2.34\approx 2$

Step 3: Taking the mole ratio as their subscripts.

The ratio of C : H = 1 : 2

Hence, the empirical formula for the given compound is $CH_2$

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4 years ago

Which metalloid is often found in microchips, semiconductors, and sand?a. boron b. arsenic c. germanium d. silicon​

Which metalloid is often found in microchips, semiconductors, and sand?a. boron b. arsenic c. germanium d. silicon