Questions in Chemistry

which resources are significantly polluted by heavy metals like mercury

Questioned by administrator @ 12/07/2022 in Chemistry viewed by 200 persons

Which resources are significantly polluted by heavy metals like mercury? a. soil b. water c. neither A nor B d. both A and B

what is the product of the hydrogenation of an alkene

Questioned by administrator @ 12/07/2022 in Chemistry viewed by 181 persons

Draw the product of the hydrogenation of 2-butyne. draw all hydrogen atoms.

how many moles are there in 24 grams of fef3

Questioned by administrator @ 12/07/2022 in Chemistry viewed by 152 persons

How many moles are there in 24.0 grams of FeF3?

select the atomic models that belong to the same element.

Questioned by administrator @ 12/07/2022 in Chemistry viewed by 131 persons

Select the atomic models that belong to the same element.

what is the percent by mass of oxygen in fe2o3

Questioned by administrator @ 12/07/2022 in Chemistry viewed by 144 persons

What is the percent by mass of oxygen in Fe2O3 (formula mass = 160)?

draw a second resonance form for the structure shown below.

Questioned by administrator @ 12/07/2022 in Chemistry viewed by 141 persons

Draw a second resonance structure for the following ion (be sure to include the charges and all lone pairs)... + ..N=N=N <-------------->.. ..

what is the molar solubility of pbbr2 in pure water

Questioned by administrator @ 12/07/2022 in Chemistry viewed by 136 persons

The ksp of pbbr2 is 6.60×10−6 . What is the molar solubility of pbbr2 in pure water?

predict whether the compounds are soluble or insoluble in water.

Questioned by administrator @ 12/07/2022 in Chemistry viewed by 140 persons

Predict whether the compounds are soluble or insoluble in water. Soluble Insoluble

which pure substance is composed of more than one element

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1) Which pure substance is composed of more than one element? A. carbonB. goldC. waterD. sodium

how many moles of no2 are present in 114.95 g

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The molar mass of NO2 is 46.01 g/mol. How many moles of NO2 are present in 114.95g?

what makes balancing redox reactions different from balancing other reactions

Questioned by administrator @ 12/07/2022 in Chemistry viewed by 128 persons

What makes balancing redox reactions different from balancing other reactions?

which energy transformation takes place when using a power drill

Questioned by administrator @ 12/07/2022 in Chemistry viewed by 149 persons

4. Which energy transformation takes place when using a power drill? A. mechanical to chemical В. electrical to mechanical с. chemical to electrical D heat to mechanical

if fluorine 20 undergoes beta decay what will it become

Questioned by administrator @ 12/07/2022 in Chemistry viewed by 147 persons

If fluorine 20 undergoes beta decay , what will it become ?

if the nucleus was the size of a tennis ball

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If the nucleus was the size of a tennis ball the atom would be the size of....?

draw the missing curved arrow notation for the mechanism below.

Questioned by administrator @ 12/07/2022 in Chemistry viewed by 144 persons

Draw a mechanism for the reaction of the aldehyde with hydronium ion. In the first box, draw any necessary curved arrows. Show the products of the reaction in the second …

what structures allow t cells to locate and destroy invaders

Questioned by administrator @ 12/07/2022 in Chemistry viewed by 150 persons

What structures allow T cells to locate and destroy invaders? O A. Macrophages O B. Pathogens O C. Lymph O D. Antibodies

the amount of substance in a certain volume is its

Questioned by administrator @ 12/07/2022 in Chemistry viewed by 132 persons

The amount of one substance in a certain volume of another substance is called its ____________________.

which of the following are correct for zero order reactions

Questioned by administrator @ 12/07/2022 in Chemistry viewed by 148 persons

Which of the following are correct for zero-order reactions? A. A higher concentration of reactants will not increase the reaction rate. B. The units for the rate constant and the …

which of the following elements has the greatest metallic character

Questioned by administrator @ 12/07/2022 in Chemistry viewed by 141 persons

Which of the following Group 15 elements has the greatest metallic character? (1) nitrogen (3) antimony (2) phosphorus (4) bismuth

dimensional analysis and the crash of flight 143 answer key

Questioned by administrator @ 12/07/2022 in Chemistry viewed by 217 persons

Explain how using dimensional analysis could have prevented this crash

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the health codes cover all issues except food handlers

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chromium metal is immersed in an aqueous solution of cobalt(ii) chloride.

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Questioned by maham237 @ 09/01/2021 in Chemistry viewed by 736 persons

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Questioned by maham237 @ 14/01/2021 in Chemistry viewed by 651 persons

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Questioned by maham237 @ 01/12/2020 in Chemistry viewed by 618 persons

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Questioned by maham237 @ 11/01/2021 in Chemistry viewed by 605 persons

which pair of elements is most apt to form a molecular compound with each other?

Questioned by maham237 @ 22/12/2020 in Chemistry viewed by 599 persons

(nh4)2s(aq)+srcl2(aq)→

Questioned by maham237 @ 23/12/2020 in Chemistry viewed by 541 persons