An atom in the ground state contains 8 valence electrons this atom is classified as a

Answers

Answer 1

Answer: Noble Gas. Metals have 1 or 2 Valence Electrons. Halogens have 7 Valence Electrons. Semi-Metals can have different amounts.

Answer 2

Answer:

Answer:

Noble gas

Explanation:

With the exception of helium, all elements in Group 18 contain 8 electrons in the outermost shell; these are the noble gases.

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Titanium has five common isotopes: 46Ti (8.0%), 47Ti (7.8%), 48Ti (73.4%), 49Ti (5.5%), 50 Ti (5.3%). What is the average atomic mass of titanium?

Answers

(46x8.0)+(47x7.8)+(48x73.4)+(49x5.5)+(50x5.3) = 4792.3

4792.3/100 = 47.923 this is the average atomic mass of Titanium

Final answer:

The average atomic mass of titanium, calculated by weighting each isotope's mass by its percent abundance, is approximately 47.923 atomic mass units (amu). This aligns closely with the atomic mass on the periodic table of 47.867 amu.

Explanation:

The average atomic mass of titanium can be calculated by weighting each isotope's mass by its percent abundance, which is essentially what an 'average' is. Here is how each isotope of titanium contributes to the average atomic mass:

46Ti: 46 amu * 0.08 = 3.68 amu
47Ti: 47 amu * 0.078 = 3.666 amu
48Ti: 48 amu * 0.734 = 35.232 amu
49Ti: 49 amu * 0.055 = 2.695 amu
50Ti: 50 amu * 0.053 = 2.65 amu

Adding it all up: 3.68 amu + 3.666 amu + 35.232 amu + 2.695 amu + 2.65 amu = 47.923 amu. Therefore, the calculated average atomic mass of titanium is approximately 47.923 amu, which aligns closely with the atomic mass on the periodic table of 47.867 amu.

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Water is known as the 'universal solvent' because:Water is capable of dissolving every substance.

Water can dissolve many ionic and covalent compounds.

Water can dissolve many substances, but often requires large amounts of heat to be added.

Water is usually available.

Answers

Water is known as the 'universal solvent' because water can dissolve many ionic and covalent compounds.

Why water is called universal solvent?

It is considered as a universal solvent because it has the ability to dissolve large number of substances in it as compared to other liquids so that's why we can say that water is a universal solvent due to its high dissolving power.

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The best answer is the second statement. It is considered as a universal solvent since most substances dissolve in water. And comparing it to other liquids, it is the one who dissolves a wide range of substances. Also, it is an important substance for every living thing.

In Ernest Rutherford's gold foil experiments, some alpha particles were deflected from their original paths, but most passed through the foil with no deflection. Which statement about gold atoms is supported by these experimental observations?Gold atoms consist mostly of empty space.

Gold atoms are similar to alpha particles.

Alpha particles and gold nuclei have opposite charges.

Alpha particles are less dense than gold atoms.

Answers

According to ErnestRutherford's gold foil tests, the true statement is that space makes up the majority of gold atoms. The correct option is A.

According to Rutherford's studies, the majority of the alphaparticles encountered free space inside the atom since they mostly went through the gold foil with little to no deflection.

This finding helped scientists comprehend that atoms have a small, compact nucleus at their center and are primarily made up of empty space elsewhere in the atom.

The nuclearmodel of the atom was created as a result of the deflection of several alpha particles, which showed that they came into contact with the positively charged atom's nucleus.

Thus, the correct option is A.

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Your question seems incomplete, the probable complete question is:

A. Gold atoms consist mostly of empty space.

B. Gold atoms are similar to alpha particles.

C. Alpha particles and gold nuclei have opposite charges.

D. Alpha particles are less dense than gold atoms

Answer:

Explanation:

What is locked up carbon dioxide

Answers

Basically it means carbon dioxide is removed from the atmosphere and is trapped in e.g. calcium carbonate (like shells), rocks, oceans etc.

Which must be a mixture of substances?
1. solid
2. liquid
3. gas
4. solution

Answers

the one that must be a mixture of substance is : 4. Solutionhere are some examples that proof option 1 - 3 could consist only with a single substance :Solid = Fe ( most commonly known as iron)Gas = He ( Most commonly known as helium)Liquid = Hg (most commonly known as mercury)

4.Solution

Further explanation

Mixtures are materials composed of two or more kinds of substances that still possess their original properties. Mixtures can also be said to represent a combination of several substances, elements or compounds

There are two types of mixtures, i.e., homogeneous mixture (or solution) and heterogeneous mixture.

Homogeneous mixture: mixture which each part contains a similar amount of solute, for example, vinegar acid solution, sugar solution, and salt solution.
Heterogeneous mixes: mixtures of which each part contains an unequal amount of solute, for example, river water, sewage water, and coffee drinks.

The solution is a homogeneous mixture of two or more substances that dissolve one another and each of the constituent substances cannot be distinguished physically anymore.

The solution consists of two components, i.e., solute and solvent.
For example, a salt solution consists of salt as a solute and water as a solvent.

In chemistry, we already know the phase of matter or state of matter, i.e., solid (s), liquid (l), gas (g), and aqueous (aq). Every chemical solution in a reaction is labeled as an aqueous phase, e.g, $\boxed{ \ NaCl_((aq)) \ }$ as a salt solution.

Consider the following examples:

$\boxed{ \ Fe_((s)) \ }$ as a solid metal iron, an element.
$\boxed{ \ H_2O_((l)) \ }$ as liquid water.
$\boxed{ \ H_2O_((s)) \ }$ as ice solids.
$\boxed{ \ H_2O_((g)) \ }$ as water vapor with a gaseous phase.
$\boxed{ \ H_2O_((l)), H_2O_((s)), H_2O_((g)) \ }$ are compounds of the same chemical formula but different phases.

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Keywords: which must be, a mixture of substances, solid, liquid, gas, solution, homogeneous, heterogeneous, phase of matter, state, aqueous, salt, water

A sample of a compound contains 32.0 g C and 8.0 g H. Its molar mass is 30.0 g/mol. What is the compound’s molecular formula

Answers

The compound's molecular formula is C2H6. This is obtained by:

mass moles divided by smallest moles
C 32g 32/12 = 2.67 1
H 8g 8/1.01 = 7.92 approx. 3

Next, divide both terms by the smallest number of moles, 2.67. This gives 1 and 3. So the empirical formula is CH3 which has a molar mass of 15g/mol. Given the molar mass of the molecular formula as 30g/mole, we can calculate the factor by which to multiply the subscripts of CH3.

X = molar mass of molecular formula / molar mass of empirical formula = 30/15
X=2

So (CH3)2 is C2H6.

Answer:

the answer is D on edge 2021

Explanation:

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Which of the following carbohydrates is a polysaccharide and not a simple sugar?O A. GlucoseO B. RiboseO C. StarchO D. FructoseO E. Galactose

This is the equation for the combustion of propane.C3H8 + 5O2 → 3CO2 + 4H2O + heatWhich are the reactants and the products in this reaction?A.The reactants are C3H8 (propane) and H2O (water). The products are O2 (oxygen) and CO2 (carbon dioxide).B.The reactants are C3H8 (propane) and O2 ( oxygen). The products are CO2 (carbon dioxide) and H2O (water).C.The reactants are CO2 (carbon dioxide) and H2O (water). The products are C3H8 (propane) and O2 ( oxygen).D.The reactants are O2 (oxygen) and CO2 (carbon dioxide). The products are C3H8 (propane) and H2O (water).

Use Hess's law and the following equations to calculate the ΔHreaction for the reaction CO(g) + 3H2(g) CH4(g) + H2O(g). (Show your work.) (4 points) • C(s) + O2(g) CO(g) ΔH = –110.5 kJ • C(s) + 2H2(g) CH4(g) ΔH = –74.85 kJ • H2(g) + O2(g) H2O(g) ΔH = –241.83 kJ