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3 years ago

What are the different parts of the SAT

2 answers:

6 0

SAT<span> consists of three major sections: Critical Reading, Mathematics, and Writing. Each section receives a score on the scale of 200–800. All scores are multiples of 10. Total scores are calculated by adding up scores of the three sections

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quester [9]3 years ago

3 0

SAT consists of three major sections: Critical Reading, Mathematics, and Writing. Each section receives a score on the scale of 200–800. All scores are multiples of 10. Total scores are calculated by adding up scores of the three sections.

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What conclusion can be determined from this map? the spread of communism into eastern europe set the stage for the korean war. t

Harrizon [31]

A conclusion which can be determined from this map is that: B. the spread of communism into eastern Asia set the stage for the Korean War.

<h3>What is communism?</h3>

Communism is a series of philosophical, political, social organization and economical ideologies that advocates for the complete elimination of private ownership of properties, while supporting a profit-based economy with public ownership of the means of production in a country.

Based on the map in the image attached below, we can infer and logically conclude that the spread of communism into eastern Asia was responsible for the Korean War between North Korea and South Korea.

Read more on Korean War here: brainly.com/question/12446159

#SPJ1

3 0

2 years ago

ANYBODY UP TO A NITRO TYPE GAME?<br><br> HERE IS MY USERNAME YAZMIN???

Oksanka [162]

Not sure what nitro is but it sound fun I’ll see if I can play with u tho lol

7 0

3 years ago

You mix 2 moles of hbr with 3 moles of koh in enough water to make 1 l of solution. What is the ph of your final solution?.

siniylev [52]

Taking into account the definition of pH and pOH, limiting reagent and reaction stoichiometry, the pH of the final solution is 14.

<h3>Limiting reagent and excess of moles.</h3>

Hydrobromic acid and potassium hydroxide react in a 1:1 mole ratio to produce aqueous potassium bromide and water, following the reaction:

HBr + KOH → KBr + H₂O

So, if you mix equal numbers of moles of each reactant, both the acid and the base will be completely consumed.

But in this case you mix 2 moles of HBr with 3 moles of KOH.

The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.

In this case, as the reaction has a 1:1 mole ratio hydrobromic acid will act as the limiting reagent, and it will be completely consumed before all the moles of potassium bromide are consumed, so there will be an excess of moles of potassium bromide.

After the reaction is complete, the resulting solution will contain an excess of moles of potassium bromide calculated as, considering that when 2 moles of hydrobromic acid are consumed, 2 moles of potassium hydroxide are consumed:

3 moles that you had at the beginning of the reaction - 2 moles that react= 1 mole of potassium bromide

<h3>Definition of molarity</h3>

Molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

$Molarity= \frac{number of moles}{volume}$

<h3>Molarity of potassium bromide</h3>

In this case you know:

number of moles= 1 mole of potassium bromide
volume= 1 L

So, the concentration of potassium bromide is calculated as:

$Molarity= \frac{1 mole}{1 L}= 1 \frac{mole}{L}$

<h3>Definition of pH</h3>

pH is a measure of acidity or alkalinity that indicates the amount of hydrogen ions present in a solution or substance.

The pH is defined as the negative base 10 logarithm of the activity of hydrogen ions, that is, the concentration of hydrogen ions or H₃O⁺:

pH= - log [H⁺]= - log [H₃O⁺]

<h3>Definition of pOH</h3>

pOH is a measure of hydroxyl ions in a solution and is expressed as the logarithm of the concentration of OH⁻ ions, with the sign changed:

pOH= - log [OH⁻]

<h3>Relationship between pH and pOH</h3>

The following relationship can be established between pH and pOH:

pOH + pH= 14

<h3>Calculation of pH in this case</h3>

In this case, the concentration of hydroxide anions are delivered to the solution by the potassium hydroxide in a 1:1 mole ratio.

So, being the concentration of potassium bromide 1 $\frac{mole}{liters}$ , the concentration [OH⁻]= 1 $\frac{mole}{liters}$ .

Replacing in the definition of pOH, then the pOH is:

pOH= - log 1 $\frac{mole}{liters}$ .

Solving:

Finally, replacing in the relationship between pH and pOH:

pH + 0=14

pH=14

In summary, the pH of the final solution is 14.

Learn more about

molarity:

<u>brainly.com/question/9324116</u>

<u>brainly.com/question/10608366</u>

<u>brainly.com/question/7429224</u>

pH and pOH:

<u>brainly.com/question/13557815?referrer=searchResults</u>

3 0

3 years ago

How many grams of lead product would theoretically be produced between 17. 0 g potassium iodide, ki, and 25. 0 g of lead (ii) ni

Fantom [35]

The number of grams of lead product that would theoretically be produced from the given reaction is; <u><em>Mass of lead product = 23.6 g</em></u>

Potassium iodide reacting with Lead(II) Nitrate would yield the balanced equation;

2KI + Pb(NO₃)₂ = 2KNO₃ + PbI₂

2moles : 1 mole = 2 moles : 1 mole

From online tables;

Molar mass of KI = 166 g/mol

Molar mass of Pb(NO₃)₂ = 331.2 g/mol

We are given;

Mass of KI = 17 g

Mass of Pb(NO₃)₂ = 25 g

Thus;

Number of moles of PbI₂ yielded in order to find the limiting reactant will be;

no of moles of PbI₂ from KI = (17g/166 g/mol) × (1 mole of PbI₂/2 mol of KI)

no of moles of PbI₂ from KI = 0.0512 mols

Similarly;

no of moles of PbI₂ from Pb(NO₃)₂ = (25g/331.2 g/mol) × (1 mole of PbI₂/1 mol of Pb(NO₃)₂)

no of moles of PbI₂ from Pb(NO₃)₂ = 0.0755 moles

We can see that KI produced the least amount of moles. Thus;

Mass = 0.0512 * molar mass of PbI₂

From tables, molar mass of PbI₂ = 461 g/mol

Thus;

Mass of lead product = 461 * 0.0512

Mass of lead product = 23.6 g

Read more about theoretical yield at; brainly.com/question/21091465

5 0

2 years ago

Which of these gases must not be exposed to oil or grease

a_sh-v [17]

Answer:

nitro is the answer i think

8 0

2 years ago