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30 Answered Questions for the topic Elements

10/31/20

Which element would have the lowest electron affinity?

Fluorine, Tellurium, Francium, Rhodium, Magnesium
Elements Science Chemistry

04/29/20

Why is water (H2O) a liquid at room temperature while carbon dioxide (CO2) is a gas? What’s different about their structures that results in very different properties?

Why is water (H2O) a liquid at room temperature while carbon dioxide (CO2) is a gas? What’s different about their structures that results in very different properties?

03/09/20

Identify what is wrong with the given electron configurations and write the correct electron configurations...

based on the number of electrons. Identify the elements. a) 1s22s22p63s23p63d10b) 1s22s22p63s23p64s24d104p3

09/18/19

How large does a star need to be for its supernova to produce element 115

How large does a star need to be for its supernova or hypernova / collapsar to produce super heavy elements like 115?Also, how abundant are these stars in the universe?
Elements Physics Vacuum

09/01/19

Directional nuclear reaction

Is there a strong enough substance that could overcome the heat and pressure of a nuclear blast, while also directing that blast? Lets say with a concave structure attached to pod?I want to know,... more

05/20/19

Sequencing problem - Is it possible to solve this problem with the given information

I have a sequencing problem that I cannot find a way to solve using the three major formulas for finding sequencing elements. The difference between terms is given (1/2). The sum of the terms is... more

10/05/18

Stable Ions From Elements

Predict the most stable ions for the following elements:   Rb Sr Li Cs Kr

06/13/18

Given the following goals and materials, create a procedural that would allow the completion of the goal, then briefly explain why it would work.

Goal: To identify an unknown element    Materials: Lithium, Calcium, Aluminum, Carbon, Nitrogen, Oxygen, Iodine, Helium 
Elements

04/02/18

Metals and nonmetals are both good conductors.

Periodic table 

01/30/18

Can someone help me with empirical formula and molar mass?

How do I find out the empirical formula of a molecule and how do I find the molecular formula?   Ex:    1. What's the empirical formula of a molecule containing 65.5% carbon, 5.5% hydrogen, and... more

01/22/18

Don't understand the "Criss Cross Method for Predicting Formulas", can someone help?

I especially don't understand the crossing between PO₄⁻³ and Ba⁺², can someone please help?
Elements Chemistry Mass

11/15/17

what is the empirical formula?

the compound xylene consists of 90.49% C and the rest is hydrogen.What is the empirical formula?
Elements Chemistry Moles

11/14/17

determine the mass of each sample

1.16 mmol carbon disulfide
Elements

10/16/17

What is the smallest possible part of an element that still has all the properties of that element

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07/22/17

A hydrogen bomb releases 1x10^17 joules. How many bomb explosions are equal to the sun's energy output each second?

A hydrogen bomb releases 1x1017 joules. How many bomb explosions are equal to the sun's energy output each second?

05/31/17

Use the following equation to answer the following questions. (Show Work Please)

Equation: 2 Mg + CO2 = 2 MgO + C (already balanced)   71.66 g of Mg react with 91.25g of CO2. What is the limiting reagent in the reaction? What is the theoretical yield of MgO? Express your... more
Elements Chemistry Matter

05/31/17

Write the formula + include ALL states of matter (Show Work Please)

Aluminum nitrate in solution reacts with aqueous potassium hydroxide to produce aluminum hydroxide and potassium nitrate
Elements Chemistry

05/31/17

What are the products of this reaction? ( Show Work + Explain )

Li2SO4 + BaCl2    The product would be LiCl + BaSO4   I am pretty sure, but can you explain why please?
Elements Chemistry Equations

05/29/17

If 16.5 g of Al are reacted with 39.2 g of chlorine gas, then aluminum chloride is formed.

Which reactant is the limiting reactant? What is the theoretical yield?   Formula: 2 Al + 3 Cl2 = 2 AlCl3 (already balanced)   Show all work for the two questions please
Elements Chemistry Moles

05/07/17

Limiting Reagents (Chemistry) Answer a-d + Show Work Please

Equation: Al2(SO3)3 + 6NaOH = 3Na2SO3 + 2Al(OH)3 (already balanced)   a) If 10.0 g of Al2(SO3)3 is reacted with 10.0 g of NaOH, determine the limiting reagent.   b) Determine the number of... more

10/30/16

List an element that fits in each of the following groups.

Halogen = Alkali metal =  Lanthanide series = Transition metal = Chalogen = Noble gas = Alkaline Earth metal = Actinide series =
Elements Math Statistics

10/16/16

Statistics Question

Type | Probability 1 ton | 0.25 2 tons | 0.06 5 tons | 0.01 10 tons | 0.11 20 tons | 0.57     An appliance dealer sells 5 types of air conditioners. The above gives the distribution of the... more

09/28/16

Calculate the number of grams of each element...

Calculate the number of grams of each element in 100 g of phenolphthalein if the compound is 75.46% C, 4.43% H, and 20.10% O by mass. Convert each to moles.
1

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