Calculate the mass in amu of 75 atoms of aluminum

Answer:

voltage difference

Explanation:

Remember, a Difference in voltage must exist in order to have current flow.

Answer : The correct option is, (2) 8 mole of hydrogen will react with 1 mole of sulfur.

Explanation :

The balanced chemical equation is,

[tex]8H_2+S_8\rightarrow 8H_2S[/tex]

By the stoichiometry we conclude that, 8 moles of hydrogen react with 1 mole of sulfur to give 8 moles of hydrogen sulfide.

Hence, the correct options is, (2) 8 mole of hydrogen will react with 1 mole of sulfur.

The transition metals are 10 columns wide on the periodic table because each d subshell can hold up to 10 electrons. This configuration leads to a variety of properties, as shown by the diverse reactivity and color of compounds among transition metals.

The transition metals are 10 columns wide on the periodic table due to the configuration of their electrons, specifically in their d orbitals. Each d subshell can accommodate up to 10 electrons, structured as 5 sets of paired electrons. This is connected to the arrangement of the transition metals in the periodic table, which are organized based on electron configuration.

The transition metals, as partially filled d orbitals, are located in the d-block of the periodic table. They vary widely in terms of reactivity, with some being very active metals like scandium and iron, while others being almost inert, such as the platinum metals.

The transition metals exhibit a variety of properties due to their complex valence shells. Because these elements have several different stable oxidation states, electron transitions in these elements can correspond with absorption of photons in the visible spectrum, causing a variety of colored compounds.

https://brainly.com/question/34265676

#SPJ11

C.  Cu undergoes reduction.

Answer: C.) Cu undergoes reduction.

Explanation:

[tex]Fe(s)+CuSO_4(aq)\rightarrow FeSO_4(aq)+Cu(s)[/tex]

I)  Oxidation reaction : involves loss of electrons and there is an increase in oxidation state number.

[tex]Fe\rightarrow Fe^{2+}+2e^-[/tex]

Fe metal has undergone oxidation, as its oxidation state is changing from 0 to +2 in [tex]FeSO_4[/tex].

ii) Reduction reaction : involves gain of electrons and there is a decrease in oxidation state number.

[tex]Cu^{2+}+2e^-\rightarrow Cu[/tex]

Copper(II) ion has undergone reduction, as its oxidation state is changing from 2+ to 0. Copper ions are getting converted into copper metal.

Answer is: C. Water can dissociate many ionic compounds through ion-dipole interactions.

For example, dissociation of potassium bromide: KBr(aq) → K⁺(aq) + Br⁻(aq).

Some ionic compounds cannot dissociate in water, for example calcium sulfate (CaSO₄), silver chloride (AgCl), lead(II)-carbonate (PbCO₃).

An ion-dipole is electrostatic interaction between a charged ion (cations and anions) and a molecule that has a dipole (in this example water).

Dipole is a separation of positive and negative charges. In water, hydrogen has positive and oxygen has negative charge.

Answer is: d.Electrons cannot exist in locations other than in specific orbits.

According to the Bohr model of the atom:

1. Energy levels of electrons are discrete (certain discrete values of energy)., that is why hydrogen shows discrete, bright, colored lines.

2. Electrons orbit the nucleus in orbits that have a set size and energy.

3. Electrons can jump from one energy level to another, absorbing or emitting electromagnetic radiation with a frequency ν (energy difference of the levels).

Answer : AgOH is a solid.

Explanation;

AgOH can be produced from the reaction between NaOH(aq) and AgNO₃(aq). The balanced reaction equation is

NaOH(aq) + AgNO₃(aq)  AgOH(s) + NaNO₃(aq)

AgOH is a brown color precipitate which has a Ksp value as  6.8 x 10⁻⁹. The molecular weight of AgOH is 124.88 g/mol.

Silver Hydroxide (AgOH) is generally a solid at room temperature, but its state can change under different conditions. It is not typically found in aqueous form.

In the field of Chemistry, AgOH, also known as Silver Hydroxide, is considered to be a solid at room temperature. Silver Hydroxide is an unstable compound that decomposes easily into its constituent water and silver oxide. Hence, it is not typically found in aqueous (dissolved in water) form. However, it's important to understand that its state can change under different conditions such as temperature and pressure.

https://brainly.com/question/35438924

#SPJ6

Answer:

The balanced equation is:

[tex] H_3PO_4 + 3 RbOH \longrightarrow 3 H_2O +Rb_3PO_4[/tex]

Explanation:

Hi, step by step:

1) Balance the Rb:

[tex]H_3PO_4 + 3 RbOH \longrightarrow H_2O +Rb_3PO_4[/tex]

2) Balance the phosphate:

[tex]1 H_3PO_4 + 3 RbOH \longrightarrow H_2O +Rb_3PO_4[/tex]

3) Balance the water:

[tex]1 H_3PO_4 + 3 RbOH \longrightarrow 3 H_2O +Rb_3PO_4[/tex]

Answer: The number of moles of carbon is 2.90 mol.

Explanation:

We are given:

Number of atoms of carbon = [tex]1.75\times 10^{24}[/tex]

According to mole concept:

[tex]6.022\time 10^{23}[/tex] number of atoms are contained in 1 mole of an element.

So, [tex]1.75\times 10^{24}[/tex] number of atoms will be contained in = [tex]\frac{1}{6.022\times 10^{23}}\times 1.75\times 10^{24}=2.90mol[/tex] of carbon.

Hence, the number of moles of carbon is 2.90 mol.

Iced tea with no ice is a homogeneous mixture. This is because it has a uniform composition and properties throughout, meaning that you can't distinguish between the different parts of the mixture.

When considering whether a substance is a homogeneous or heterogeneous mixture, it's important to look at its physical characteristics. Iced tea with no ice is an example of a homogeneous mixture. Despite the misleading name, the absence of ice does not change the nature of the substance. A homogeneous mixture is defined as a mixture that has uniform composition and properties throughout. This means that you can't distinguish between the different parts of the mixture. Since all portions of the tea mixture are the same, it meets this criterion. On the other hand, a heterogeneous mixture has different compositions and properties in different parts of the mixture.

https://brainly.com/question/32534073

#SPJ6

Final answer:

The volume of HCl needed to neutralize a given amount of Mg(OH)₂ can be found by first writing the balanced chemical equation, determining the moles of Mg(OH)₂, calculating the moles of HCl required, and then using the molarity of the HCl solution to find the necessary volume.

Explanation:

To calculate the volume of HCl needed to neutralize a certain amount of Mg(OH)₂, we first need to write the balanced chemical equation for the reaction:

Mg(OH)₂ + 2 HCl -> MgCl₂ + 2 H₂O

From the equation, we see that it takes 2 moles of HCl to neutralize 1 mole of Mg(OH)₂. Say we calculate the moles of Mg(OH)₂ using its molar mass, then we can determine the moles of HCl required. After that, using the molarity of the HCl solution, we can find the volume of HCl needed.

For example, assuming we have x moles of Mg(OH)₂:

Moles of HCl required = 2x moles

Volume of HCl = Moles of HCl / Molarity of HCl solution

The volume calculated will give us the answer to how much HCl is required to neutralize the Mg(OH)₂.

Answer:

answer was A on edunity

Explanation:

Hello!

Order of magnitude of a measure is an estimate of the base power 10 closest to a given measure.

The scientific notation (N) of 0.000000639 (x), being  (number of decimal places) y, knowing that the scientific notation according to the rule of scientific notation, before the comma can only have the numbers 1 to 9, let's see:

[tex] N = x*10^y [/tex]

[tex] N = 0.000000639*10^y [/tex]

[tex] \boxed{\boxed{N = 6.39*10^{-7}}}\end{array}}\qquad\checkmark [/tex]

note: Moved 7 decimal places to the right negatively

I Hope this helps, greetings ... DexteR! =)

Answer : The number in scientific notation will be, [tex]1.6456\times 10^3[/tex]

Explanation :

Scientific notation : It is defined as the way or representation of expressing the number that are too big or too small that is written in the decimal form. That means always written in the power of 10 form.

For example : 8000 is written as, [tex]8\times 10^3[/tex]  and 0.0008 is written as, [tex]8\times 10^{-4}[/tex]

As we are given that the number is, 1645.6

This number is written in scientific notation as, [tex]1.6456\times 10^3[/tex]

Therefore, the number in scientific notation will be, [tex]1.6456\times 10^3[/tex]

Answer:

H2

Explanation:

It is a diatomic molecule, meaning it is formed through covalent bonding.

Final answer:

The Lewis structure of potassium chloride (KCl) shows K+ with no electrons around it and Cl- with eight dots, signifying ionic bonds and full valence shells. In contrast, hydrogen chloride (HCl) has a single line or pair of dots between H and Cl, representing a pair of shared electrons in a covalent bond, with Cl also having three pairs of lone electrons.

Explanation:

The Lewis structures for potassium chloride (KCl) and hydrogen chloride (HCl) differ significantly due to the nature of their bonds. Potassium chloride is an ionic compound consisting of potassium (K+) ions and chloride (Cl−) ions. In its Lewis structure, there are no shared electrons; instead, the potassium atom donates an electron to the chloride atom, resulting in a full outer shell for both ions. The potassium ion is typically represented as a K+ with no dots around it, while the chloride ion is represented as a Cl− with eight dots surrounding it to indicate a full valence shell.

On the other hand, hydrogen chloride is a covalent compound where the hydrogen (H) and the chlorine (Cl) share a pair of electrons, demonstrated in its Lewis structure by a single line (or a pair of dots) between the H and Cl atoms, where each atom contributes one electron to the bond. The chlorine atom also has three pairs of lone electrons that are not involved in the bond, represented by three additional pairs of dots around the Cl atom.

Due to these differences in bonding, the ionic forces in KCl lead to a crystalline solid structure at room temperature, while HCl, which consists of discrete covalent molecules, forms a gaseous compound under similar conditions.

Final answer:

An ecologist studying plant mineral requirements and water intake is engaging in ecology, a sub-discipline of biology concerned with how organisms interact with their environment and their adaptations for survival.

Explanation:

An ecologist who is studying the mineral requirements and daily water intake of a plant species is focused on the field of biology, particularly the sub-discipline of ecology. This field of study is concerned with the physiological, morphological, and behavioral adaptations that allow organisms to survive in specific habitats. By analyzing these factors, ecologists can predict the needs and sustainability of various species within their ecosystems. For instance, field studies may include collecting data in natural environments on various organisms, while laboratory studies could involve analyzing samples or data gathered in the field or applying mathematical models to predict future outcomes. Ecologists not only conduct research but also work in education, policy advisory, and conservation management, often requiring a broad background in the physical sciences and proficiency in mathematics and statistics.

Final answer:

An ecologist studying a plant's mineral and water needs is engaging in biological research within the field of ecology, at the organism level of ecological study. Their work contributes to various societal needs and typically requires an undergraduate degree in the natural sciences.

Explanation:

Understanding Ecological Study in Biology

An ecologist studying the mineral requirements and daily water intake of a plant species is conducting research that falls within the discipline of biology, particularly within the subdivision of ecology. Ecology is a broad field that examines the relationships between organisms and their environments, including the interactions they have with other species and the non-living parts of their ecosystems. In studying a plant's mineral requirements and water intake, an ecologist engages in research at the organism level, which can contribute vital information for understanding the overall health and functioning of ecological systems.

Ecological research can occur both in natural environments (field studies) and controlled lab settings. Field studies might involve observations and data collection in a plant's natural habitat, whereas laboratory studies could involve controlled experiments to determine the specific mineral and water needs of a plant. Additionally, ecologists use various scientific methods and tools, including computer modeling, to analyze and predict ecological outcomes.

Ecologists contribute to many aspects of human society by managing natural resources, advising on policy, and educating the public. To become an ecologist, one typically pursues an undergraduate degree in a natural science, sometimes followed by specialized training or an advanced degree, acquiring a solid foundation in mathematics and statistics along the way.