I need help. How do you solve this ?

I Need Help. How Do You Solve This ?

Answers

Answer 1

Answer:

it's number four 122.36

Explanation:

54.87% of 223 is 122.36


Related Questions

Compared to carbon dioxide, oxygen has a relatively _____ solubility coefficient and so requires a _____ partial pressure gradient to help diffuse the gas into the blood.

Answers

Oxygen has a relatively low solubility coefficient and therefore requires a steep (high) partial pressure gradient to help diffuse the gas into the blood.

Solubility is described as the limiting amount of an element that can dissolve in any amount of solvent at a set temperature. Since oxygen has a low coefficient of this, it requires the help of a higher partial pressure gradient to diffuse properly into the bloodstream.

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Porphyry copper deposits that are weathered are more valuable than nonweathered deposits because ______.

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Porphyry copper deposits describes copper ore bodies which are formed from large copper ore bodies due to the high temperature exerted by magmatic fluid originating below the ore deposit.

Weathered portion of the Porphyry copper resulting from the reaction of hydrothermal fluid are washed to greater depth level below the unweathered portion of the deposit.

Copper deposits at greater depth are usually more concentrated with copper than those above.

Hence, reason why weathered porphyry are more valuable than unweathered porphyry.

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Drinking water should have sufficiently low levels of __________ to prevent disease. What is the missing word in this sentence?

Answers

For water to be drinkable, it must have sufficiently low levels of dissolved salts and microbes.

Drinking water should have sufficiently low levels of dissolved salts to prevent disease.

What are the benefits of dissolved salts?

Water contains dissolved salts which provide taste to water for drinking purposes. Also these salts are essential for growth and development of plants. These dissolved salts provide the essential minerals which are required for growth of body.

A dissolved salt disappears within a solution, so you can't see what it looks like. For example, when table salt dissolves in water, the Na+ and Cl- ions that form it dissociate and the ions float freely in water. You can no longer see the individual salt grains.

The two largest dissolved components of typical seawater are chlorine (56% of total) and sodium (31% of total), with the total of all lumped under the designation of “salts.”

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Would the answer be B?

Answers

Answer:

yes the answer would be b

Mg(OH)2+2 HCI = MgCI2+ H2O

Answers

Answer:

Mg(OH)2 + 2HCI ⇒ MgCI2 + 2H2O

Explanation:

In order to balance a chemical equation you need to make sure both sides of the equations are equal.

Mg(OH)2 + 2HCI = MgCI2 + H2O

Mg = 1

Oh = 2

HCI = 2

Products:

Mg = 1

CI = 2

H = 2

O = 1

2H20 = 1 × 2 = 2

2 × 2 = 4

2HCI

1 × 2 = 2

Mg(OH)2 + 2HCI ⇒ MgCI2 + 2H2O

Hope this helps.

Please help! I need the answers! you’ll get 25 points!!

Answers

you subtract and then you divide if that doesn’t work subtract

Answer:

183918551670's1665

....

what is the maximum number of electrons that can occupy the 3 shell of an atom?

Answers

The first shell can hold up to two electrons, the second shell can hold up to eight (2 + 6) electrons, the third shell can hold up to 18 (2 + 6 + 10)

why are glass, quartz and plastics not used as ir sample holders?

Answers

Answer:

not used as sample holders because --> are opaque and absorb ir radiation

Explanation:

glass/quartz would absorb the IR radiation and mask the absorbtion of your sample.

IR sample holders must be made out of transparent materials. The glass, quartz, and plastics are not used as IR sample holders.

What is meant by transparent materials?

Glass may travel entirely through transparent materials without any light bouncing back. Comparatively, translucent materials permit some light to pass through while also reflecting some light off their surface. All light is reflected off the surface of opaque materials.

Glass, Quartz, and plastics are not used as IR sample holders because they are opaque to IR radiation and would absorb in the IR spectrum and mask the absorption of the sample.

IR sample holders must be made out of transparent materials.

Therefore, glass, quartz, and plastics are not used as IR sample holders.

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Determine the heat required to raise the temperature of 9.4 mole of water from 75.0oC to 125oC at atmospheric pressure. Note that water transitions from the liquid to the vapor state. Express your answers in Joules.

Answers

The heat capacity required to raise the temperature of  9.4 mole of water from 75.0oC to 125oC at atmospheric pressure is 35429 J.

The following information is available from the question;

Number of moles =  9.4 mole

Initial temperature =  75.0oC

Final temperature = 125oC

Molar heat capacity = 75.38 J/mol °C

Now;

H = ncθ

m = Number of moles of water

c = Molar heat capacity of water

θ = Temperature rise

Substituting values;

H = 9.4 mole × 75.38 J/mol °C × ( 125oC - 75.0oC)

H = 35429 J

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WILL MARK AS BRAINLIEST IF CORRECT

Answers

[tex]\huge\bold{\purple{\bold{⚡a.⚡}}} [/tex]

[tex]\huge\bold{\red{\bold{⚡c.⚡}}} [/tex]

Both of the above are correct- because :

Products in a reaction are next to the direction arrow. So, CO2 is a product. Reactants are present on LHS(side opposite to the direction of arrow). So O2 is a reactant

[tex]\huge\underline\mathtt\colorbox{cyan}{Hope it helps!}[/tex]

100points and BRAINEST awnser PLEASEEEE HELP


I need help with 2 and three

Answers

Answer:

2 H2O → 2 H2 + O. Decomposition of water.

There are 4 hydrogen atoms on the left side of the equation (CH4)

2 on the right side (H2O).

Two oxygen atoms

Explanation:

identify whether each change represents an oxidation or reduction. then determine how many electrons were involved and which side of the reaction they should appear on in the half-reaction.

Answers

Al ⇒ Al³⁺ is an oxidation and 3 electrons on the right side are needed.Cu²⁺ ⇒ Cu is a reduction and 2 electrons on the left side are needed.2 F⁻ ⇒ F₂ is an oxidation and 2 electrons on the right side are needed.

In a redox reaction, we can identify 2 kinds of half-reactions:

Oxidation: the oxidation number increases.Reduction: the oxidation number decreases.

Let's consider the following half-reactions.

Al ⇒ Al³⁺

This is an oxidation because the oxidation number increases from 0 to 3+. To balance it, we need 3 electrons on the right side.

Cu²⁺ ⇒ Cu

This is a reduction because the oxidation number decreases from 2+ to 0. To balance it, we need 2 electrons on the right side.

2 F⁻ ⇒ F₂

This is an oxidation because the oxidation number increases from -1 to 0. To balance it, we need 2 electrons on the right side.

Al ⇒ Al³⁺ is an oxidation and 3 electrons on the right side are needed.Cu²⁺ ⇒ Cu is a reduction and 2 electrons on the left side are needed.2 F⁻ ⇒ F₂ is an oxidation and 2 electrons on the right side are needed.

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Identify whether each change represents an oxidation or reduction. then determine how many electrons were involved and which side of the reaction they should appear on in the half-reaction.

Al ⇒ Al³⁺

Cu²⁺ ⇒ Cu

2 F⁻ ⇒ F₂

What is an element that is crucial building block of DNA?

What is the element that makes up approximately 50% of bones mass?

What is the radioactive heavy metal, often considered as the most dangerous element?

What property does noble gases share? ​

Answers

1. Adenine, cytosine, guanine, or thymine.

2. Calcium

3. They are many different radioactive heavy metals, but the most dangerous elements is arguably Polonium.

4. They are all odorless, colorless, monatomic gases with very low chemical reactivity.

What animal have jaws?

Answers

Answer:

all of em

Explanation:

they got mouths right

10L of a gas are stored at 20 °C and 12 atm pressure. How many moles of gas are there? ( convert temp to Kelvin )

Answers

Answer:

5.0mol

Explanation:

Use the ideal gas law, PV = nRT

P = 12atm, V = 10L, R = 0.0821 atm•L/mol•K, and T = 20°C

First, convert the temperature to kelvin by adding 273.15. That's 293.15.

Now, modify the equation to solve for mols. That's n = PV/RT.

Input your values:

n = (12atm)(10L)/( 0.0821 atm•L/mol•K)(293.15K)

n = 4.985953116mol

Round to 2 significant figures to get 5.0mol

(I don't know if you usually do rounding so you may want to keep the answer exact)

What is a nuclear chain reaction, and how is it related to the concept of a critical mass?

Answers

the minimum amount of nuclear material needed to cause a chain reaction to continue without stopping

Answer:

uueuryfyfyfygd ehh bccvbbnmcj cr i

Write the nuclear decay equation for the alpha particle decay of Pu-243

Answers

Answer:

Explanation:

The reaction can be represented by this nuclear equation: 23892U → 23490Th + 42He + Energy.

PLS HELP ASAP I WILL GIVE BRAINLIEST FOR THE ANSWER THAT IS RIGHT!Based on the diagram below, in what period is the atom located on the periodic table? *a. period 4b. period 2c. period 6d. period 1

Answers

Answer:

6

Explanation:

im guessing because there is no diagram

An atom that has lost or gained an electron no longer has a neutral charge. We call this negatively or positively charged atom a(n) ________.

Answers

Answer:

ion

Explanation:

An atom that has lost or gained an electron no longer has a neutral charge. We call this negatively or positively charged atom a(n) ________.

ion

An atom that has lost or gained an electron no longer has a neutral charge. We call this negatively or positively charged atom a(n) " ion".

What are lost electrons?

A positively charged atoms has lost electrons.

An Electron are easy to remove from the atom, electron has negative charge. Initially; atom is neutral that is the charge of electron is equal to the charge of the proton, when atom loose some of its electron, the net charge of electrons is less than the net charge of the Protons makes the atom positively charged.

An atom that has lost or gained an electron no longer has a neutral charge. We call this negatively or positively charged atom a(n) " ion".

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Help! Will give brainlist!

Answers

Answer:

Organic compound: 1) found naturally in or produce by living things or 2) it contains carbon

Inorganic compound: does not come form living things

Explanation:

Organic molecules associated with living organisms are also called biomolecules. Organic compounds are molecules that contain carbon atoms covalently bonded to hydrogen atoms (C-H bonds).

it was believed that chemical synthesis could occur only in living organisms and organic compounds were defined as coming from living organisms, whereas inorganic compounds come from nonliving sources.

I hope this helps.

A hydrocarbon contains 7.7% by mass of hydrogen and 92.3 by mass of carbon and the relative molecular mass is 78 derive the empirical formula of the compound and the molecular formula

Answers

Answer:

molecular mass = 78

Empirical Formula is

C= 92.3/12= 7.69

H= 7.68/1= 7.68

therefore Empirical formula is

CH

molecular formula is

(CH)n= 78

(12+1)n=78

n=78/13

n=6

molecular formula is

C6H6

A wave has a length of 380 nm. Find its frequency in Hz.

Answers

Answer:

The shortest wavelength of visible light is 380 nm. Its frequency is 7.89x1014Hz. That will be visible light’s highest frequency.

Explanation:

Determine the amount of heat energy in joules required to raise the temperature of 7.40g of water from 29.0OC to 46.0 OC Specific heat of water is: 4.184 J/gOC

Answers

The amount of heat energy in joules required to raise the temperature of 7.40g of water is 526.35 Joules

The amount of energy is expressed according to the formula expressed as:

[tex]E = mc\triangle \theta[/tex]

m is the mass of water = 7.40grams

c is the specific heat of water =  4.184 J/g⁰C

[tex]\triangle \theta = 46 - 29\\ \triangle \theta = 17^0[/tex]

Substitute the given parameters into the formula:

[tex]E = 7.4 \times 17 \times 4.184\\E=526.3472Joules[/tex]

Hence the amount of heat energy in joules required to raise the temperature of 7.40g of water is 526.35 Joules

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A sacrificial anode can be used to protect a metal like iron from corrosion. In order for this to work, the anode must be _____ than the metal that it is protecting.

Answers

Answer:

more active

Explanation:

one mole of titanium contains how many atoms

Answers

6.022 x 10 23 titanium atoms

In 47.88 grams of titanium, there is one mole, or 6.022 x 1023 titanium atoms.

Hope this helps :)

Help Asap for Brainlist

Answers

Answer:

3rd option

Explanation:


2. An atom has 24 protons and 28 neutrons.
What is the atomic number

Answers

Answer:

The atomic number is 24.

Explanation:

The atomic number is the total amount of protons that an atom has. How it differs between the atomic mass is that the atomic mass is the total sum of protons and neutron. If an atom is neutral (Non-ionized), then the amount of electrons is equal to the amount of protons.

This atom has:

An atomic number of 24Has 24 electronsAn atomic mass of 52This atom is Chromium-52

how to find valence electrons from electron configuration

Answers

Answer:

group 8 noble gases

Explanation:

they are inert gases so have Valence electron configuration

what is lattice energy and how is it involved in an ionic bond

Answers

Answer:

Lattice energy is an estimate of the bond strength in ionic compounds. It is defined as the heat of formation for ions of opposite charge in the gas phase to combine into an ionic solid.

Explanation:

What is the answer for this question down below?

Answers

Answer:

This is a potassium because it's atomic number is fifteen

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