Calculate the value of [Ca2 ] in pure water. Calculate the value of [Ca2 ] in a 1.0 x 10-3 M Na2CO3.

Answer: Cr2(SO4)3 its this

Explanation:

Answer:A. Because only two electrons can fit in the first orbit around the nucleus, and each period on the table is organized by number of orbits

Explanation: This is because the The periodic table of elements is designed according to the number of shells from up going down together with  their increasing number of atomic numbers, Now only Hydrogen and Helium have one shell and are therefore the only two elements that should be placed in the first period .

Also note that in filling of their s-orbital, the maximum number of electrons that it can contain is 2 as in 1s²

See related answer here: https://brainly.com/question/9894635

8 stereoisomers are possible for the given compound.

In the stereoisomer category, there are a number of further subcategories. Stereoisomers are molecules with the same chemical formula that change only in how their atoms are organized in three-dimensional space. Geometrical isomers and optical isomers are the two primary categories of stereoisomers.

Geometric isomers, which are the kind of stereoisomer produced by a double bond or a ring structure, are also known as cis and trans isomers. The geometric isomers cis-2-butene and trans-2-butene are the most straightforward examples.

Molecules with optical isomers have mirror-image structures and can never be overlaid on one another. Because they lack the plane of symmetry, such molecules are referred to as chiral. Enantiomers are the names for the d and l isomers.

To view more about stereoisomers, refer to:

https://brainly.com/question/21479796

#SPJ4

Answer: 2

Explanation: Potassium, K, has only 1 valence electron, 4s^1.  Oxygen, O, needs 2 more electrons to complete its valence shell to make 8 electrons.  That means 2 K atoms will combine with 1 O atom, to produce K2O, potassium oxide.  Both K electrons are stolen by the single O atom, so 2 electrons are transferred.

The likely outcome if mitochondria are exposed to high levels of cyanide will be that the cyanide will prevent movement of electrons along the electron transport chain.

The majority of the chemical energy required to drive a cell's metabolic operations is produced by mitochondria, which are membrane-bound cell organelles (mitochondrion, singular). Adenosine triphosphate, a tiny molecule, serves as a storage container for the chemical energy generated by the mitochondria (ATP).

More than 90% of the energy in your body's cells is produced by mitochondria, which act as batteries in the cells. In high-energy-demanding organs including your heart, liver, muscles, and brain, mitochondria play a critical role. Mitochondria make about 25% of liver cells and 40% of heart muscle cells, respectively.

The unique compartments (organelles) in human cells called mitochondria are well recognised for acting as energy producers by disassembling food molecules and producing ATP, a fuel for the remainder of the cell

Learn more about mitochondria:

https://brainly.com/question/869305

#SPJ4

The complete question is ''When purified cytochrome oxidase is exposed to cyanide, the cyanide binds reversibly and with high affinity to the enzyme's active site. What will be the likely outcome if mitochondria are exposed to high levels of cyanide?

A. The cyanide will prevent movement of electrons along the electron transport chain.

B. The cyanide will block movement of protons across the inner mitochondrial membrane.

C. The cyanide will inhibit transfer of electrons from NADH to initiate electron transport.

D. The cyanide will prevent oxygen from reaching the mitochondrial matrix.

The correct answer is equality which tells how much of one unit is equal to another unit.

By determining the base quantities and units of measure for each physical quantity and tracking these dimensions as computations or comparisons are made, the dimensional analysis examines the relationships between various physical quantities. Due to the regular 10-base in all units, converting between dimensional units within the metric or SI system is frequently simpler than it is in other systems. Algebraic conversions are frequently done using dimensional analysis, most specifically the factor-label approach also called the unit-factor method. Even if they are initially expressed in different units of measure, such as yards and meters, commensurable physical quantities are the same kind, have the same dimension, and may be compared directly to one another.

Learn more about the dimensional analysis here:-

https://brainly.com/question/13078117

#SPJ4

Answer:

it have more more mass, gravitational potential energy

Explanation:

Answer:

artificial polymer fibers that melt upon heating

Explanation:

b) Neon is the gas that has it's outer electron shell.

Neon is an example of an atom that has its outer electron shell completely filled. Neon belongs to the noble gas group (Group 18) of the periodic table, and it has a full outer electron shell with 8 electrons. The full outer electron shell gives neon stability and makes it chemically inert, meaning it does not readily form chemical bonds with other elements.

To learn more about Noble gases, visit:

https://brainly.com/question/19024000

#SPJ11

In order of increasing electronegativity, the elements are Li, P, and Fr. Electronegativity is a measure of an atom's ability to attract electrons towards itself when it forms a bond with another atom.

Lithium (Li) has a relatively low electronegativity value compared to other elements, which means that it does not attract electrons strongly. Phosphorus (P) has a higher electronegativity value than Li, meaning that it attracts electrons more strongly. Francium (Fr), on the other hand, has the highest electronegativity value among the three elements, as it is a highly reactive metal and attracts electrons strongly.

Therefore, the order of increasing electronegativity is Li < P < Fr.
Hello! I'd be happy to help you with your question. When arranging the elements Li (Lithium), Fr (Francium), and P (Phosphorus) in order of increasing electronegativity, you should consider the periodic trends.

Electronegativity typically increases from left to right across a period and decreases from top to bottom within a group. Based on these trends, we can arrange the given elements as follows:

1. Fr (Francium) - It is located in Group 1 and Period 7, so it has the lowest electronegativity among the three elements.
2. Li (Lithium) - It is also in Group 1, but in Period 2, so it has a higher electronegativity than Fr but still relatively low compared to other elements.
3. P (Phosphorus) - Located in Group 15 and Period 3, it has the highest electronegativity among the three elements.

In conclusion, the order of increasing electronegativity is Fr < Li < P.

To know more about Li Fr P Li< P Fr P. please visit.....

brainly.com/question/31328531

#SPJ11

Answer:

1) Zn is a element

2)CuSO4 is an ionic compound

Explanation:

Answer: an element and an ionic compound

Explanation: my mom told me

5.71 grams of NH3 must be dissolved in 759 g of methanol to create a 0.350 m solution.

determine the mass of NH3 that must be dissolved in 759 g of methanol to make a 0.350 m solution, we need to calculate the number of moles of NH3 required and then convert it to grams using its molar mass.

First, we need to calculate the number of moles of NH3 using the molarity (M) formula:

Molarity (M) = Moles of solute / Volume of solution (in liters)

Rearranging the formula, we can calculate the moles of solute:

Moles of solute = Molarity (M) × Volume of solution (in liters)

Here, the molarity (M) is given as 0.350 m. To find the volume of the solution, we need to convert the given mass of methanol to volume using its density.

Let's assume the density of methanol (CH3OH) is 0.791 g/mL. Therefore, the volume of 759 g of methanol is calculated as follows:

Volume of solution = Mass of methanol / Density of methanol

Volume of solution = 759 g / 0.791 g/mL ≈ 960 mL (or 0.960 L)

Now we can calculate the moles of NH3:

Moles of NH3 = 0.350 mol/L × 0.960 L = 0.336 mol

Finally, we can convert the moles of NH3 to grams using its molar mass:

Molar mass of NH3: N (atomic mass = 14.01 g/mol) + H (atomic mass = 1.01 g/mol) × 3 = 17.03 g/mol

Mass of NH3 = Moles of NH3 × Molar mass of NH3

Mass of NH3 = 0.336 mol × 17.03 g/mol ≈ 5.71 g

Therefore, 5.71 grams of NH3 must be dissolved in 759 g of methanol to make a 0.350 m solution.

To know more about methanol refer here

https://brainly.com/question/3909690#

#SPJ11

Answer:

The correct statement is;

(B) Only II

Explanation:

I) The atomic mass unit or amu which is also known as daltons which is defined as 1/12 × the mass of a carbon-12 atom, which is therefore, 1.660538921 × ⁻²⁴ grams

Therefore, the mass of 1 atom of carbon-12 = 12 amu

II) The mass of one mole of oxygen-16 is 16 grams while the mass of one mole of carbon-12 is 12 grams

The mass of 4 atoms of carbon 12 = 4 × 12 amu = 48 amu

The mass of 1 atom of oxygen-16 = 15.99491461956 amu

Therefore, the mass of 3 atoms of oxygen-16 = 3 × 15.99491461956 = 47.9847438587 amu ≈ 48 amu

Therefore only II is correct.

Answer:

a. CH4+202→CO2+2H2O

b.Zn+2HCl→ZnCl2+H2

c.H2SO4+8HI→H2S+4I2+4H2O

d.4NaCl+2SO2+2H2O+O2→2Na2SO4+4HCl

Explanation:

everything can be found in the picture above

Hope this helps

Answer:

9 protons

Explanation:

By looking at the periodic table, you will see that Fluorine has 9 protons. Since the number of electrons equal the number of protons, Fluorine has 9 electrons as well. Meanwhile, it's mass number of 19, minus 10 neutrons, gives you 9 protons or electrons. Hence, the atom would be Fluorine.

hope u make me brainlesst ʘ‿ʘ

Answer:

i think so for this i will 9 protons . atomic mass is 19. 10 neutrons

To determine the grams of CO2 formed when 7.50 g of C2H5OH (ethanol) is produced, we need to consider the balanced chemical equation for the combustion of ethanol:

C2H5OH + 3O2 -> 2CO2 + 3H2O

From the balanced equation, we can see that for every 1 mole of C2H5OH, 2 moles of CO2 are produced. We can use the molar mass of ethanol and the molar mass of CO2 to calculate the grams of CO2 produced.

The molar mass of C2H5OH is calculated as follows:

(2 x molar mass of C) + (6 x molar mass of H) + molar mass of O

(2 x 12.01 g/mol) + (6 x 1.008 g/mol) + 16.00 g/mol = 46.07 g/mol

Now we can set up a proportion to calculate the grams of CO2:

(7.50 g C2H5OH) / (46.07 g/mol C2H5OH) = (x g CO2) / (44.01 g/mol CO2)

Cross-multiplying the proportion:

7.50 g C2H5OH * (44.01 g/mol CO2) = 46.07 g/mol C2H5OH * x g CO2

Simplifying the expression:

x = (7.50 g C2H5OH * 44.01 g/mol CO2) / 46.07 g/mol C2H5OH

Calculating the result:

x ≈ 7.17 g CO2

Therefore, approximately 7.17 grams of CO2 are formed when 7.50 grams of C2H5OH are produced.

Correct way to draw an atom is to draw proton neutron and electron in an atom

Atom is a particle of matter that uniquely defines a chemical element and the atom is drawn in the oval shape and in that the nucleus is present and also proton neutron and electron are also present and nucleus is surrounded by the one or more negative charge electron and also the nucleus is positively charged and contains one or more relatively heavy particles known as protons and neutrons

Know more about neutron, proton, electron

https://brainly.com/question/9165676

#SPJ1

Most of Earth's volcanoes are formed by the interaction of continental plates.

What is earth sciences?

It is the study of the Earth's structure, properties, processes, and four and a half billion years of biotic evolution.

The movement of faults at plate boundaries can provide a convenient pathway for magma to reach surface. It helps to explain this by looking at three main types of plate boundary:

Constructive boundaries:

Destructive boundaries:

Thus option a is correct answer

Learn more about volcanoes at Brainly.com https://brainly.com/question/440765

#SPJ13

The density of the substance having a mass of 2.0 g is 0.4 g/mL (Option D)

First, we shall obtain the volume of the substance. This can be obtained as follow:

Volume of substance = (Volume of water + substance) - (Volume of water)

Volume of substance = 75 - 70

Volume of substance = 5 mL

Finally, we shall determine the density of the substance. This is illustrated below:

Density = mass / volume

Density of substance = 2 / 5

Density of substance = 0.4 g/mL

Thus, the density is 0.4 g/mL (Option D)

Learn more about density:

https://brainly.com/question/952755

#SPJ1

If a 50 cm³ sample of gas exerts a pressure of 60 kPa at 35°C, then the volume it will occupy at STP is approximately 20.8 cm³.

To calculate the volume of the gas sample at STP we can use the combined gas law. Using the Combined Gas Law, we can relate the volume, pressure and temperature of a gas.

P1V1/T1 = P2V2/T2

Where,

P1V1/T1 is the initial state of gas and P2V2/T2 is the final state of gas.

P1 = 60 kPa

V1 = 50 cm³

T1 = (35 + 273.15) K = 308.15 K

P2 = 101.325 kPa (at STP)

V2 = ?

T2 = 273.15 K

Plugging the values in the formula,

P1V1/T1 = P2V2/T2

60 × 50 / 308.15 = 101.325 × V2 / 273.15

V2 = 101.325 × 60 × 50 / 308.15 × 273.15

V2 = 20.8 cm³

Thus, the volume of the gas sample at STP will be approximately 20.8 cm³.

Learn more about Combined Gas Law here: https://brainly.com/question/29341891

#SPJ11

Answer:

CuCl

Explanation:

Cuprous chloride, CuCl, can be prepared by treating metallic copper and cuprous oxide with hydrochloric acid or by treating metallic copper and cupric chloride with hydrochloric acid.

The correct compound is CuCl, where copper is in the +1 oxidation state and is bonded to chloride, making it copper(I) chloride.

Copper(I) chloride refers to the compound where copper is in the +1 oxidation state. The lower chloride of copper has the formula CuCl and is known as cuprous chloride or copper(I) chloride. The material is a white solid that is mainly soluble in strong hydrochloric acid but only sporadically soluble in water.To identify the correct compound, we need to determine which option corresponds to a compound with copper in the +1 oxidation state bonded to chloride. The correct compound is CuCl. In this compound, copper has a +1 oxidation state, while chloride has a -1 oxidation state. The ratio of copper to chloride is 1:1, indicating that a single copper atom is bonded to a single chloride ion.

Let’s examine the other options:

- \(Cu_2Cl\): This compound implies a copper(I) ion (Cu+) bonded to two chloride ions. However, this does not match the desired copper(I) chloride.

- \(CuCl_2\): This compound indicates a copper(II) ion (Cu2+) bonded to two chloride ions, which is not copper(I) chloride.

- \(Cu_2Cl_3\) and\(Cu_3Cl_2\): These compounds have different ratios of copper to chloride, and their oxidation states do not correspond to copper(I) chloride.

Learn more about oxidation here:

https://brainly.com/question/13182308

#SPJ11

Answer: F : Gas

Explanation:

Answer:

because it includes all compunds with h and c

Explanation:

The wavelength of an electromagnetic radiation that has a frequency of 5.65 x 10¹¹ hertz is 5.31 × 10-⁴m.

Wavelength is the length of a single cycle of a wave, as measured by the distance between one peak or trough of a wave and the next.

Wavelength is often designated in physics as λ, and corresponds to the velocity of the wave divided by its frequency as follows:

λ = v/f

According to this question, a wave has a frequency of 5.65 × 10¹¹ Hertz, the wavelength can be calculated as follows:

λ = 3 × 10⁸m/s ÷ 5.65 × 10¹¹ Hertz

λ = 5.31 × 10-⁴m

Therefore, 5.31 × 10-⁴m is the wavelength of the wave.

Learn more about wavelength at: https://brainly.com/question/12924624

#SPJ1

Ques.1: Why do you think that you had to use a thin layer of onion skin, rather than a thick layer for the microscope?

Ans:- It is because, I the onion peel is thick layered, then it will be hard or impossible to see through the microscope.

Ques.2: When iodine reacts with starch, it produces a blue-black color. Starch is a white substance which plants use to store food. What structure did you see better because of the iodine? Why did you see this structure better?

Ans: Amylose in starch is responsible for the formation of a deep blue color in the presence of iodine. The iodine molecule slips inside of the amylose coil.

This makes a linear triiodide ion complex with is soluble that slips into the coil of the starch causing an intense blue-black color.

Due to this, we can see the structure better.

Ques.3: From low power to high power, what structures became clearer in the stained onion tissue?

Ans: From lower to higher power, we can see:-

-- Large, rectangular interlocking cells,

-- Clearly visible distinct cell walls surrounding the cells,

-- Dark stained nucleus,

-- Large vacuoles at the center,

-- Small granules may be observed inside the cells (within the cytoplasm)

Ques.4: What is the shape of an onion cell?

Ans: The shape of an onion cell is rectangular or square in shape.

The estimation of the acidic and the basic character of a solution is called and defined by the pH. The \(\rm [H^{+}]\) concentration of the solution will be \(\rm 1.77\times 10^{-4}.\)

pH is a measurement of the free hydrogen and hydroxyl ions in the solution of the substance.

It can be calculated as:

\(\rm pH = - \rm log[H^{+}]\)

Given,

pH = 3.75

Substituting values in the equation:

\(\begin{aligned}\rm 3.75 &= -\rm log[H^{+}]\\\\\rm [H^{+}] &= 10^{-3.75}\\\\&= 1.7782 \times 10^{-4}\end{aligned}\)

Therefore,  \(\rm 1.77\times 10^{-4}\) is the concentration of the hydrogen ions.

Learn more about pH here:

https://brainly.com/question/10285267

Answer:

1.78 x 10^nM

n= -4

Explanation:

the answer after that is A

Answer: False

Explanation: If new evidence is found, new ideas are answered and new scientific theories are made.