Please help me!!!

The graph below represents the heating of water in a pot. At 150 seconds, the water has just reached a boil. If the heat is left on, what will happen to the temperature and volume of water in the pot? (All temperatures in °C.)


A. The temperature will rise, and the water volume will decrease.

B. The temperature will rise, and the water volume will remain constant.

C. The temperature will remain constant, and the water volume will decrease.

D. The temperature will remain constant, and the water volume will remain constant.

Answer:

The Hydrogen Atom

The atom consists of a proton and an electron held together by the electromagnetic force between the positively charged proton and the negatively charged electron. If we add a proton to the hydrogen nucleus we would get helium (a different element). Here are two common isotopes of helium.

Answer:

Mass = 208.26 g

Explanation:

Given data:

Volume of water = 40.0 mL

Volume of water + copper = 63.4 mL

Volume of copper = ?

Density of copper = 8.9 g/cm³

Mass of copper = ?

Solution:

Volume of copper:

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

Volume of copper =  63.4 mL -  40.0 mL

Volume of copper = 23.4 mL

Mass of copper:

density = mass/volume

8.9 g/cm³ = mass/23.4 mL

 cm³ = mL

Mass = 8.9 g/mL × 23.4 mL

Mass = 208.26 g

Answer: element

Explanation:

It only has one type of atom making it a element

Answer:

1.24 moles

Explanation:

first find the molar mass of AgNO3, which I got 169.877

then, divide the number of moles used by the Molar mas

210/169.877 = 1.2361 = 1.24

Since, the molar ratios of AgNO3 and Ag are the same (2:2), the answer will be 1.24

Answer:

Amount left after 25 days = 12.5 g

Explanation:

Given data:

Mass of sample = 400 g

Half life of sample = 5 days

Mass left after 25 days = ?

Solution:

First of all we will calculate the number of half lives passes in given time period.

Number of half lives = Time elapsed / Half life

Number of half lives = 25 days/ 5 days

Number of half lives = 5

At time zero = 400 g

At 1st half life = 400 g/2 = 200 g

At 2nd half life = 200 g/2 = 100 g

At 3rd half life = 100 g/2 = 50 g

At 4th half life = 50 g/2 = 25 g

At 5th half life = 25 g/2 = 12.5 g

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Answer:

10, 16, 13

Explanation: I just took the test and it was correct :)

Answer:

C. number of particles

Explanation:

Entropy is the measure of disorderliness of a system. Remember that when you dissolve salt in water, you increase the number of particles in the solution. The greater the number of particles in solution, the greater the entropy of the  solution system.

Hence dissolution of a salt in water increases the entropy by increasing the number of particles in solution leading to the inequality; Ssolution > Swater + Ssalt.

Answer: the molar mass will be too high

Explanation:

Answer:

4

Explanation

i just know the answer

Answer:

A) behavior

Explanation:

Answer: Halogens

Explanation:

Halogens include elements like Fluorine, Chlorine, Iodine and Bromine. These  elements can be dangerous to humans especially when used in large quantities.

When combined with other elements however, they can form very useful materials. Chlorine for instance forms salt when combined with sodium. Fluorine becomes very useful in toothpaste to protect teeth and bromine can be used in pesticides.

Answer:

It is a hard ferromagnetic, silver-white, lustrous, brittle element.

It is stable in air and does not react with water.

Like other metals, it can also be magnetized.

With dilute acids, it reacts slowly.

The metal melts at 1495 °C and boils at 2927 °C

Explanation:

hope this helps! maybe mark me brainliest?

Answer:

D I think.............

Answer:

1)C 2)B 3)D

Explanation:

1. The process represents chemical change is vinegar bubbles when baking soda is added.

2. The process is an example of a physical change is carrots are cut into small pieces and mixed into a salad.

The appearance or form of matter changes during a physical change, but the type of matter in the substance does not.

A chemical change, on the other hand, changes the type of matter and creates at least one new substance with new properties.

3. Rusting is a chemical change.

4. A beaker suddenly becomes very warm when you mix two room-temperature it is a clue that a chemical change has occurred.

5. To cause a chemical change in wood, you can burn it.

6. A scratched surface is not a good indication that a chemical change has occurred.

Thus, The process represents chemical change is vinegar bubbles when baking soda is added.

To learn more about the physical and chemical change, follow the link;

https://brainly.com/question/11321843

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Answer:

What elements?

Explanation:

The alkali metals are softer than most other metals. Cesium and francium are the most reactive elements in this group. Alkali metals can explode if they are exposed to water.

Not sure if this what you were talking about but here

This from google btw not gonna lie

Answer:

Explanation:

A)  No reaction occurs. It is really hard to replace Mg once a reaction has taken place. (NR)

B) Ca + Cu(ii)Br2 ==> Cu + CaBr2.  Calcium only ionizes to Ca2+

C) 3K + Al(NO3)3 ===> Al + 3KNO3   Potassium is very reactive.

D) Mg + AgNO3  ====> Mg(N03)2 + Ag

Answer: It will take 68 days for the palladium to decay.

Explanation: ima smart dude

Answer:

Mercury

Explanation:

It is also highly toxic

Answer:

1:1

Explanation:

Answer:

It's option B, 1:2

Explanation:

I have the same problem, and it was marked correct when I clicked on option B.

Answer:

Intramolecular

The follow up answer for "The two strands of a DNA molecule are separate molecules that are held together by weak electrostatic attractions." is Intermolecular.

The next answer is Intermolecular

The scenario describes intramolecular forces.

Intramolecular forces are the forces that keep atoms together inside a molecule. Intermolecular forces are forces that exist among molecules. determine intermolecular appeal between H-Cl molecules and intramolecular attraction within H-Cl molecules.

The most powerful intermolecular forces are dipole-dipole interactions. A dipole-dipole pressure is while the high-quality aspect of a polar molecule draws the bad facet of every other polar molecule.

Learn more about intermolecular forces here: https://brainly.com/question/25920008

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Answer:

Explanation:

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Answer:

P₄O₁₀

Explanation:

The molecular formula of phosphorus pentooxide is P₄O₁₀

Gypsum is composed of calcium sulphate (CaSO4) and water (H2O). Its chemical name is calcium sulphate dihydrate (CaSO4. 2H2O).

Answer:

0.002

Explanation:

The significant figures of a number are digits that are meaningful in trying to resolve a given value. These are actually digits that carry meaning in a given number.

Let s look at  0.002, the zero before the decimal  point carries no real meaning in the number. However, the zeros that precede 2 are all meaningful because the occupy the tenth and hundreth place values.

Hence, there are three significant figure in  0.002.

Answer:

Explanation:

Boi

Answer:

This question is incomplete but the missing part is in the document attached

Noor's idea is correct

Explanation:

Noor's idea is correct. This is because the temperature rise in the two experiments are the same and can be calculated as follow

Hanif's experiment: 45 - 21 = 24 °C

Noor's experiment: 42 - 18 = 24 °C

Thus, the correct idea is both reactions gave out same amount of heat