**Answer:**

**1.) B**

**2.) water**

How much heat is needed to warm 250g of water from 22℃ to 98℃?

**Answer:**

Thus, the required heat is 79kJ 79 k J .

**Explanation:**

i think its the right bottem one

How many grams of silver nitrate are required to produce 3.00 g of silver phosphate?

**Answer:**

105.3

**Explanation:**

105.3 grams of sliver

The correct name for P2O5 is

a

b

phosphorus(ll) oxide

phosphorus(five) oxide

diphosphorus oxide

diphosphorus pentoxide

С

d

**ANSWER**** **

**p2O5**** ****is**** ****diphosphorus pentoxide. **

Imagine the tarantula lost their fangs and the lion lost their sharp teeth. What do you think would happen?

they would not survive in a natural setting!

**Answer:**

I’d still be afraid of them :)) lol thx for the points. Hope you having a good day!

The three types of intermolecular forces have different strengths. Rank

them from weakest to strongest.

There are three different types of intermolecular forces in terms of strength. They are (strongest to weakest) hydrogen bonding, dipole-dipole and Van der Waals' forces.

How did chemists make their proposed model of the sub atomic particles?

**Answer:**

Because they want to clarify or give solution to the particle that the other didn't know

**Explanation:**

Correct me if im wrong thanks

True or false: All heterotrophs are omnivores.

**Answer:**

False. They can be both omnivores and carnivores.

what physical properties does radium have

**Answer:**

Radium is silvery, lustrous, soft, intensely radioactive. It readily oxidizes on exposure to air, turning from almost pure white to black. Radium is luminescent, corrodes in water to form radium hydroxide. Although is the heaviest member of the alkaline-earth group it is the most volatile..

Help! Please and thank you

i think it would be c

C.......................

The solubility of potassium sulfate in water is 16 grams per 100

milliliter at 50 degrees centigrade. The smallest amount of water

which will dissolve 4 grams of this substance at the same temperature

will be

The answer is 25 grams for this question

Describe a time in the group discussion when someone cited evidence from their research to make a point.

The** role** of the presenter in a group **discussion** to introduce** information** for the group to **discuss**.

A **discussion** involving a number of **people** who are **connected** by some shared activity, interest, or** quality**.

**Group** discussion is a tool to test your **teamwork **skills, listening skills, discussion **ability**, subject knowledge, and **communication**.

**Intrinsic** skills like reasoning, **speaking** and time management come in very **handy**.

**Skills **that you can work upon include** presentation**, summarizing and people **speaking.**

The purpose of a group **discussion** is not to win an **argument** or to amuse your **classmates. **

The **purpose** of a discussion is to help each **group** member explore and discover** personal** meanings of a text through **interaction** with other people.

Learn more about group** discussion** here:

https://brainly.com/question/11940982

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**Answer:**

This happened when a nutritional question was presented. When asked a nutritional question, evidence was cited from one of the above sites to back up the answer.

**Explanation:**

Calculate the force applied (in newtons) if a pressure of 6000Pa is acting on an area of 15m?

Force = pressure/ area

F = 6000/15

Force = 400 Pa/m

F = 6000/15

Force = 400 Pa/m

Finally, what mass of Na2HPO4 is required? Again, assume a 1.00 L volume buffer solution. Target pH = 7.49 Acid/Base pair: NaH2PO4 Na2HPO4 PK = 7.21 [Na2HPO4] > [NaH2PO4] (NaH2PO4) = 0.100 M 12.0 g NaH2PO4 required [base] [acid] = 1.91 [Na2HPO4) = 0.191 M. There is 1.00 L of solution. Use the molar mass of the base (141.95 g/mol)to find the mass required. Cubmit Answer Try Another Version 3 item attempts remaining

Help Would Be Much Obliged!

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What is the chemical formula for propane?

C38H

3C8H

C3H8

3CH8

**Answer:**

C38H

Thank You! :)

C3H8 is the chemical formula for propane

If a metal that had reacted very

slowly with dilute acid was

tested with a concentrated

one, what would you predict

would happen?

**Answer:**

It would react better than what with dilute and will furnish more hydrogen gas.

It would react faster due to the substances concentration percentage. The higher the concentration, the stronger it is, making it a quicker reaction with the metal.

How many grams are in 2.50 moles of copper?

**Answer:**

There are 63.546 grams in a 2.50 moles of copper.

Hi hello I need help ASAP

Determine the slope of this line

a.2.5

b.0.75

c.1

d.0.4

**Answer:**

so I got it wrong the first time but you should pick two points on the line such as 4,3 and 9,5. Then use the equation y^2 - y^1/ x^2 - X^1. You would get 2/5 which is D.

**Explanation**

Given the following reaction: 2N2O5=2N2O4+O2, if the rate of oxygen production is 0.15M/min, determine:

a. The rate that N2O5 is consumed

b. The rate that N2O4 is produced

**Answer:**

a. [tex]r_{N_2O_5}=-0.075M/min[/tex]

b. [tex]r_{N_2O_4}=0.075M/min[/tex]

**Explanation:**

Hello.

In this case, according to the balanced chemical reaction, we can write the law of rate proportions:

[tex]\frac{r_{N_2O_5}}{-2} =\frac{r_{N_2O_4}}{2} =\frac{r_{O_2}}{1}[/tex]

Thus, we proceed as follows:

a. Since the rate of oxygen production is 0.15 M/min, we can make the following setup:

[tex]\frac{r_{N_2O_5}}{-2} =\frac{r_{O_2}}{1}\\\\r_{N_2O_5}=\frac{r_{O_2}}{-2} =\frac{0.15M/min}{-2}\\\\ r_{N_2O_5}=-0.075M/min[/tex]

b. Since the rate of oxygen production is 0.15 M/min, we can make the following setup:

[tex]\frac{r_{N_2O_4}}{2} =\frac{r_{O_2}}{1}\\\\r_{N_2O_4}=\frac{r_{O_2}}{2} =\frac{0.15M/min}{2}\\\\ r_{N_2O_4}=0.075M/min[/tex]

Best regards!

What kind of mixture is frozen

yogurt with sprinkles, fudge, and

gummy bears? How can you tell

**Answer:**

a heterogeneous mixture

**Explanation:**

I can see all of the different parts of the frozen yogurt, and if I were to pick up a gummy bear, it would come out. Thus, it is not fully/completely mixed with the other components.

It is a** heterogenous mixture**.

A type of mixtures where all the components are mixed uniformly called as **homogeneous** mixture.

Here the **Particles **are distributed in an** uniform **way, called as** solution.** Example rainwater, vinegar.

It consist of one** phase**, It can’t be separated out **physically**

In **heterogenous mixture**, all the components are completely and equally mixed, particles can be seen under a **microscope.**

Here the **Particles **are distributed **non-uniform** way, Example: seawater, pizza, etc.

It can be in two or **more phases **and separated out physically

Learn more about **heterogenous mixture**, here:

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1. What is WRONG with the setup used by the student to solve this

problem?

10 points

If 53.8 grams of Aluminum Carbide is treated with Sodium Oxide, how many moles of Aluminum Oxide is

produced?

AlqC3 +6 Na2O + 2 Al2O3 + 3 Nand

53.8 g ALC

1 mole ALC

2 mole Al2O3

101.96g Al2O3

143.92 g AL C3

1 mole ALC

1 mole Al2O3

The student used the wrong mole ratio.

O The student is solving for the wrong unit.

Ο Ο Ο

The student used incorrect steps.

The student's setup is correct.

INITI

**Answer:**

Trump or biden or obama or soba or you or beach

How many energy levels contain electrons in an atom of zirconium (Zr)?

**The number of energy levels of zirconium is 5, and I know this because it is located in family five. Families are the rows across on the periodic table. The family number is always equal to the number of energy levels.**Zirconium: properties of free atoms. Zirconium atoms have 40 electrons and the shell structure is 2.8.

**Hope this helps have a awesome day/night✨**

**Explanation:**

Which term refers to the number of moles of solute per liter of solution?

Question 1 options:

mole fraction

saturation

concentration

molarity

**Answer:**

molarity

**Explanation:**

This is 10th grade Chemistry

**Answer:**

shift to restore equilibrium

**Explanation:**

**Le Châtelier's Principle** states that when a stress is applied to a system at equilibrium, the system will respond by shifting in the direction (either towards the products or reactants side) that opposes/ minimizes the effect of the stress.

Note that although the system tries to restore equilibrium, this equilibrium is a new equilibrium.

**Equilibrium** is the state of a reversible reaction when:

• two opposing reactions occur at the same rate;

• the concentrations of reactants and products are constant

Can someone help me!!!!!

**Answer:**

Can u somehow make it bigger please?

**Explanation:**

help !!! pretty please ❤️

**Answer:**

See below!

**Explanation:**

To find the symbol of the element, you have to use the periodic table.

The mass number is the number of protons and neutrons in the atom.

The atomic number is the number of protons in the atom.

You can find the number of protons from the periodic table.

You can find the neutrons by subtracting the mass number by the number of protons in the atom.

Unless you have an ion, you will have the same amount of electrons as you do protons.

To write in nuclear notation, you write the chemical symbol with the mass number and atomic number shown in the attachment. It is preferable to have the mass number and atomic number directly above each other.

If 23.2 g of a given gas occupies a volume of 93.2 L at a particular temperature and pressure, what

mass of the gas occupies a volume of 10.4 L under the same conditions?

Answer:

2.59g

Explanation:

Using Avagadro's law equation as follows:

V1/n1 = V2/n2

Where;

V1 = initial volume (litres)

V2 = final volume (litres)

n1 = first amount of gas in grams

n2 = second amount of gas in grams

According to the information provided in this question, v1 = 93.2L, v2 = 10.4L, n1 = 23.2 g, n2 = ?

Using V1/n1 = V2/n2

93.2/23.2 = 10.4/n2

Cross multiply

93.2 × n2 = 23.2 × 10.4

93.2n2 = 241.28

n2 = 241.28/93.2

n2 = 2.588

n2 = 2.59g

The **mass of the gas** is 2.59g that occupies a **volume **of 10.4 L under the same conditions.

V₁/n₁ = V₂/n₂

Where

V₁ = **initial** volume (litres)

V₂ = **final** volume (litres)

n₁ = **first amount** of gas in grams

n₂ = **second amount **of gas in grams

Given:

V₁ = 93.2L,

V₂ = 10.4L,

n₁ = 23.2 g,

To find:

n₂ = ?

On substituting the values:

93.2/23.2 = 10.4/n₂

93.2 * n₂ = 23.2 * 10.4

93.2* n₂ = 241.28

n₂ = 241.28/93.2

n₂ = 2.588

**n₂ = 2.59g**

Thus, the **mass** of the gas is **2.59g**.

Find more information about **Avogadro law** here:

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What are the coefficients needed to balance

the following chemical equation?

--- N2 + --- F2 ---> --- NF3

The balanced equation:

N2 + 3 F2 ---> 2 NF3

What will a balloon do to a cloth if its negatively charged

**Answer:**

This involves negatively charged particles (electrons) jumping to positively charged objects. When you rub the balloons against the fabric they become negatively charged. They take some of the electrons from the fabric and leave them positively charged.

**Explanation:**

Negative charges attract to positive charges. If a balloon is not rubbed with the wool cloth, it has an equal amount of negative to positive charges, so it will attract to a rubbed balloon. When both balloons are rubbed with the wool cloth, the both receive negative charges, so they will repel each other.

What are the similarities between a phylogenetic trees and cladograms.

**Answer: A phylogenetic tree is an evolutionary tree that shows the evolutionary relationships between different groups of animals, Cladograms give a hypothetical picture of the actual evolutionary history of the organisms **

**Explanation: Hope this helps you out :)**

This is 10th grade Chemistry

It’s the the 3rd one because equilibrium actually mean it’s equal or the same

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