Which definition best describes global warming?
-a long-term change in the Earth's climate -a long-term increase in the Earth's average temperature
-a long-term change in the climate of a region
-a city KD solar heat that is radiated out into space​

Answer: it should be 80g

Explanation:

0.69(78)Explanation:

yes use the masses of an element below calculate the mass of it 8.70 mole of each 3M

Answer:

c

Explanation:

just took the test 100 on it the test is simple machines

Answer:

Cl2 acts as an oxidizing agent

Explanation:

The balanced equation is

Cl2+NaOH⟶NaCl+NaClO3+H2O

Cl2 acts as a reactant in this chemical reaction

Cl2 receives one electron and thus reduces itself from Cl2 to 2 Cl−. This indicates that 2Cl- will oxidize some other element and hence Cl2 act as an   oxidizing agent.

Answer:

B-346.0 mmHg.

Explanation:

Hi there!

In this case, according to the Dalton's law, which explains that the total pressure of a gas mixture is calculated by adding up the partial pressure of each gas, we can set up the following equation for the mixture given here:

[tex]P_T=p_{CO_2}+p_{N_2}+p_{O_2}[/tex]

In such a way, for the required answer, it solve for the partial pressure of oxygen to obtain:

[tex]p_{O_2}=P_T-p_{CO_2}-p_{N_2}[/tex]

Thereafter, we plug in the known pressures to obtain:

[tex]p_{O_2}=630mmHg-124mmHg-160mmHg\\\\p_{O_2}=346mmHg[/tex]

And the answer is B-346.0 mmHg.

Best regards!

Answer:

balanced equation mole ratio 5 2 mol NO/1 mol O2

10.00 g O2 3 1 mol O2/32.00 g O2 5 0.3125 mol O2

20.00 g NO 3 1 mol NO/30.01 g NO 5 0.6664 mol NO

actual mole ratio 5 0.6664 mol NO/0.3125 mol O2 5 2.132 mol NO/1.000 mol O2

Because the actual mole ratio of NO:O2 is larger than the balanced equation mole

ratio of NO:O2, there is an excess of NO; O2 is the limiting reactant.

Mass of NO used 5 0.3125 mol O2 3 2 mol NO/1 mol O2 5 0.6250 mol NO

0.6250 mol NO 3 30.01 g NO/1 mol NO 5 18.76 g NO

Mass of NO2 produced 5 0.6250 mol NO2 3 46.01 g NO2/1 mol NO2 5 28.76 g NO2

Excess NO 5 20.00 g NO 2 18.76 g NO 5 1.24 g N

Explanation:

Answer:

466.65 K

Explanation:

Using the formula of  Pressure law,

P/T = P'/T'.................... Equation 1

Where P = Intial pressure of gas, T = Initial temperature of gas, P' = Final pressure of gas, T' = Final temperature of gas.

make T' The subeject of equation 1

T' = (P'T)/P................... Equation 2

From the question,

Given: P = 500 Torr = (500×133.322) N/m² = 66661 N/m², T = 35°C = (35+273) = 308 K, P' = 101000 N/m²( Standard pressure)

Substitute these values into equation 2

T' = (101000×308)/66661

T' = 466.65 K

Explanation:

(a) a functional group is a special group of atoms or bonds in a compound that is responsible for the chemical reactions, behavior, and characteristics of that compound. (b) Functional group is present in both the compound is alcohol (-OH).

Functional groups are specific groupings of atoms within molecules that have their own characteristic properties, regardless of the other atoms present in a molecule. Common examples are alcohols, amines, carboxylic acids, ketones, and ethers.

Key Points

Functional groups are often used to “functionalize” a compound, affording it different physical and chemical properties than it would have in its original form.

Functional groups will undergo the same type of reactions regardless of the compound of which they are a part; however, the presence of certain functional groups within close proximity can limit reactivity.

Functional groups can be used to distinguish similar compounds from each other.

Key Terms

functional group: A specific grouping of elements that is characteristic of a class of compounds, and determines some properties and reactions of that class.

functionalization: Addition of specific functional groups to afford the compound new, desirable properties.

The expected outcome of carrying out this step as planned is :

B. The resulting pH will be less than 7 because potassium hydroxide is less concentrated than the hydrochloric acid.

The expected outcome of carrying out this step as planned is the resulting pH will be less than 7 because potassium hydroxide is less concentrated than the hydrochloric acid.

pH may be a degree of how acidic/basic water is.

The run goes from - 14, with 7 being unbiased. pHs of less than 7 demonstrate causticity, while a pH of more noteworthy than 7 demonstrates a base.

pH is truly a degree of the relative amount of free hydrogen and hydroxyl particles within the water

Thus, the correct answer is B.

Learn more about "Acids":

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Answer:

[tex]ClO^-\\\\Sr^{2+}[/tex]

Explanation:

Hello there!

In this case, according to the reaction between hypochlorous acid and strontium hydroxide which yields stontium hypochlorite and water as a neutralization reaction:

[tex]2HClO(aq)+Sr(OH)_2(aq)\rightarrow Sr(ClO)_2(aq)+2H_2O(l)[/tex]

Thus, since HClO is a weak acid, it is not fully ionized so the complete ionic equation turns out to be:

[tex]2H^++2ClO^-+Sr^{2+}+2(OH)^-\rightarrow Sr^{2+}+2(ClO)^-+2H_2O(l)[/tex]

Whereas the spectator ions, which remain the same at both sides of the equation, are:

[tex]ClO^-\\\\Sr^{2+}[/tex]

Best regards!

Answer: good for him

Explanation: jk

its the dna which is in the NUCLEAS which is probably the answer

GOOD LUCK

Answer:

a maximum number of 10 electrons can share

Explanation:

How many electrons in an atom can have quantum numbers of N 3 and ML 2?

Therefore, a maximum number of 10 electrons can share these two quantum numbers in an atom.

Answer:

23.8g

Explanation :

Convert 2.0M into mol using mol= concentration x volume

2.0M x 0.1L (convert 100mL to L since the units for M is mol/L)

= 0.2 mol

We can now find grams by using the molar mass of KBr

=119.023 g/mol (Found online) webqc.org

but can be be calculated by using the molecular weight of K and Br found on the periodic table

We can now calculate the grams by using grams=mol x molar mass

119.023g/mol x 0.2mol

= 23.8046 g

=23.8g (rounded to 1decimal place)

Answer:

787.3 g of CO₂

Explanation:

The combustion of octane is this one:

2C₈H₁₈  +  25O₂  →   16CO₂  +  18H₂O

2 moles of octane react to 25 moles of oxygen in order to produce 16 moles of CO₂ and 18 moles of water.

The products in combustion reactions are always CO₂ and H₂O. The oxygen is always a reactant.

We convert mass to moles: 255 g . 1mol /114g = 2.24 moles

2 moles of C₈H₁₈ can produce 16 moles of CO₂

Then, 2.24 moles may produce (2.24 . 16)/2 = 17.9 moles of CO₂

We convert moles to mass:

17.9 mol . 44g/mol = 787.3 g of CO₂

Answer:

676mmHg

Explanation:

Using the formula;

P1/T1 = P2/T2

Where;

P1 = initial pressure (mmHg)

P2 = final pressure (mmHg)

T1 = initial temperature (K)

T2 = final temperature (K)

According to the information provided in this question;

P1 = 725.0mmHg

P2 = ?

T1 = 20°C = 20 + 273 = 293K

T2 = 0°C = 0 + 273 = 273K

Using P1/T1 = P2/T2

725/293 = P2/273

Cross multiply

725 × 273 = 293 × P2

197925 = 293P2

P2 = 197925 ÷ 293

P2 = 676mmHg.

The resulting pressure is 676mmHg

Answer:

Lithium, Li

Explanation:

Metallic elements are elements which form ions by loss of electrons. They are electropositive elements. During the formation of compounds, they easily give up or donate their electrons to other atoms to become positively charged ions. Examples of metals include, sodium, lithium, magnesium, etc

The ionization process of metals is generally shown below:

X ---> X+ + e-

Where X is a metal, and e- rare electrons

Non-metals are elements which form ions by gain of electrons. They are electronegative elements. During the formation of compounds, they accept electrons from electropositive elements to form negatively charged ions or anions. Examples of non-metals include oxygen, chlorine, iodine, etc.

The ionization process of non-metals generally, is shown below:

Y + e- ----> Y-

Semi-metals like silicon, usually form compounds by sharing of electrons with other elements.

Explanation:

Son muchos los beneficios del catión monovalente (K+) en las plantas y cultivos, mencionaremos algunos:

-Interviene en el proceso de apertura y cierre de los estomas; el catión (k+) ayuda a que los estomas puedan realizar correctamente  el proceso de la fotosíntesis es decir  la absorción del dióxido de carbono para producir oxígeno y agua; este proceso ayuda a que la planta pueda fabricar su propio alimento es decir transformar materiales inorgánicos en orgánicos como azúcares y carbohidratos que son aprovechables por la planta para realizar diversas funciones catalíticas como la respiración celular,la fosforilación y la síntesis de proteínas; este proceso también contribuye a que la planta pueda almacenar y retener suficiente agua lo cual ayuda a evitar el estrés hídrico en la planta.

Por lo tanto si la planta tiene una buena concentración de potasio como catión monovalente(k+); es posible que tenga un buen crecimiento y desarrollo radicular ,así mismo la calidad de los cultivos será muy buena,seran cultivos muy nutritivos y saludables. Algunos cultivos que necesitan una alta cantidad de potasio son los cítricos y el banano.

Answer:

its yellow

Explanation:

it's a constant law .... much explanation

from 0 to 9

we have

black .o

brown 1

red 2

orange 3

yellow 4

green 5

blue 6

violet 7

grey 8

white 9

Answer:n

Explanation:

Answer:

3

Explanation:

3 is the answer is did this a little while ago

Answer:

Check your toilet for leaks. ...

Stop using your toilet as an ashtray or wastebasket. ...

Put a plastic bottle in your toilet tank. ...

Take shorter showers. ...

Install water-saving shower heads or flow restrictors. ...

Take baths. ...

Turn off the water while brushing your teeth. ...

Turn off the water while shaving.

Explanation:

Answer:

keeping the water clean

Explanation:

avoid dumping rubish in the water

Answer:

1.05 atm

It should be 1 atm = 760 mm; therefore, 798 mm x (1 atm/760) = about 1.05 atm.

The value of pressure in atm that would be equal to 798 mmHg is 1.05 atmospheric.

Pressure is a physical quantity or a kind of force which is perpendicularly applied on the surface area of any object so that force is equally distributed on that surface.

Pressure will be maesured by various unit and have relation with one another.

As we know that, 1 atm = 760 mmHg

Or 1 mmHg = 1/760atm

Given quantity of pressure is 798 mmHg and we calculate this quantity by multiply this value by 1/760 and we get,

798 mmHg = 798mmHg × 1/760atm/mmHg = 1.05 atm

Hence required value of pressure is 1.05 atm.

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