please help! An ice cube (25 g) is removed from a freezer at 0 °C. How much energy is required to completely melt the ice cube?

Answers

Answer 1

Answer:

So it takes 80 calories of heat to melt 1 g of an ice cube, now do the math. (Hope this helped)

Explanation:


Related Questions

which reaction is faster?why?

Answers

Answer:no answer

Explanation:

Temperature. Usually reactions speed up with increasing temperature. Physical state of reactants. Powders react faster than blocks - greater surface area and since the reaction occurs at the surface we get a faster rate.

1. Raw egg to boiled egg.
2. Batter to idli.
3. Wet clothes to dry clothes.
4. Woollen yarn to knitted
sweater.
5. Grain to its flour.
6. Cold water to hot water.
7. Straight string to a coiled string.
8. Bud to flower.
9. Milk to Cheese.
10. Cowdung to biogas.
II. Ice cream to melted ice-cream.
12. Stretched rubber band to
its normal size.
13. Souring of milk.
14. Ripening of a mango.
15. Dissolving sugar in water.

these are reversible or Irreversible, chemical or physical, Natural or manmade, periodic or non periodic,desirable or undesirable?​

Answers

Answer:

1.Irreversible

2.Physical

3.

What classification should this reaction have? CaC12 + F2 = CaF2 + CI2

Answers

Answer:

Single-Replacement Reaction

General Formulas and Concepts:

Types of Reactions

Synthesis Reactions: A + B → AB Decomposition Reactions: AB → A + B Single-Replacement Reactions: A + BC → AB + C Double-Replacement Reactions: AB + CD → AD + BC

Explanation:

Step 1: Define reaction

CaCl₂ + F₂ → CaF₂ + Cl₂

Step 2: Identify backplate

Single-Replacement Reactions: A + BC → AB + C

BC = CaCl₂

A = F₂

AB = CaF₂

C = Cl₂

what is the substance of air

Answers

Answer:

The air in the atmosphere consists of nitrogen, oxygen, which is the life-sustaining substance for animals and humans, carbon dioxide, water vapour and small amounts of other elements (argon, neon, etc.). Higher in the atmosphere air also contains ozone, helium and hydrogen.

Explanation:

:))

Indicate the answer choice that best completes the statement or answers the question.
The crust and upper mantle make up Earth's
O a. lithosphere Ob. asthenosphere
O d. continents
Oc. core
Question 2
Question 3
Question 4
Question 5
Question 6
Question 7
Question 8
Question 9
Question 10
Question 11
Question 12
Question 13
Question 14
Question 15
Question 16
Question 17
Question 18
Question 19
Question 20
LO

Answers

Answer: lithosphere

Explanation:

continents are a part of lithosphere.

core is a structure of earth

Which type of substance have a definite shape and fixed volume?
Solids only
Liquids and solids
Gases only
Liquids and Gases

Answers

The answer is A. Solids only
Answer: A Solids only



Explanation: Happy Thanksgiving!

The concept of continental drift was developed by Alfred Wegener. Which of the following pieces of evidence does NOT support Wegener's hypothesis?
Group of answer choices

Fossils of the same organisms are found on different continents.

Similar glacial sediments are found in different parts of the world.

The shapes of the continents fit together like pieces of a jigsaw puzzle

Climates at different latitudes are similar to one another.

Answers

Answer:

Climates at different latitudes are similar to one another.

Explanation:

The choice that is not a proof of Wegener's concept of concept of continental drift is that climates at different latitudes ae similar to one another.

Wegener did not use climatic evidence to proof continental drift. He did use fossils found on different continents such as the mesosaurus to propose the theory of continental drift. Wegener also used evidence of glacial sediments to justify his claims. He also fitted the earth into a giant puzzle.

Answer:

Climates at different latitudes are similar to one another.

The more quickly you change your _____, the more ____ you will have to exert

Answers

Answer:

name, force

Explanation:

What ion will be formed by the selenium atom shown below when it has a stable set of valence electrons?
Selenium atom
A. Se6+
B. Se2+
C. Se6-
D. Se2-

Answers

Answer:

Explanation:

D. Se2−

Selenium is in Group 16 of the periodic table, and it typically has 6 valence electrons. To achieve a stable set of valence electrons, it will either try to gain two more electrons to form Se²⁻or lose six electrons to form Se⁶⁺. Therefore, the correct option is option D.

An ion is an atom or a molecule that has gained or lost one or more electrons, resulting in an unequal number of protons and electrons. When an atom gains electrons, it becomes negatively charged and is called an anion. Conversely, when an atom loses electrons, it becomes positively charged and is called a cation.

Ions play a crucial role in chemical reactions and the formation of chemical compounds, as they are attracted to one another based on their opposite charges. This process helps stabilize the electron configuration and achieve a more stable, lower-energy state.

Thus, the ideal selection is option D.

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what is the total number of electrons found in the valence shell of noble gas in the ground state?

Answers

Answer:

eight

Because the noble gases are the least reactive of all elements, their eight valence electrons are used as the standard for nonreactivity and to explain how other elements interact.

Explanation:

Which statement describes the blood type of a person with the alleles IAi?

It is type AB because I and i are codominant.
It is type AB because A and i are codominant.
It is type A because i is dominant and A is recessive.
It is type A because A is dominant and i is recessive.

Answers

Answer:

I answer this question I think I said the second one

Answer:

yep its the second one

Explanation:

Evaluating Lewis Structures
Explain what is wrong with the following structure.

An upper H is single-bonded to a H to the right, which is single bonded to an upper O with pairs of dots above, to the left, and below.

Answers

Answer:

Hydrogen cannot have more than two electrons. Hydrogen bonds to only one other atom at a time.There are too many electrons in the final structure.

Explanation:

Answer:

Explanation:

Hydrogen cannot have more than two electrons. Hydrogen bonds to only one other atom at a time. There are too many electrons in the final structure.

What holds the two parts of a metal together?
S
E
A​

Answers

Answer: The metal is held together by the strong forces of attraction between the positive nuclei and the delocalized electrons (The Electron Sea Model.

Explanation: I hope that helped!

The metal is held together by the strong forces of attraction between the positive nuclei and the delocalized electrons (Figure 1). Figure 1: Metallic Bonding: The Electron Sea Model: Positive atomic nuclei (orange circles) surrounded by a sea of delocalized electrons (yellow circles).

What is a limiting reagent? A.) The reactant that is used up first in a reaction B.) The reactant that is used the least reactive in a reaction C.) the reactant with the smallest coefficient in the equation D.) the reactant with the largest coefficient in the equation

Answers

Answer: A.) The reactant that is used up first in a reaction

The reactant that is totally consumed during a reaction, or the limiting reagent, decides when the process comes to an end. A limiting reagent is the reactant that is used up first in a reaction. Therefore, option A is correct.

What is a limiting reagent?

A reactant that is completely consumed at the end of a chemical reaction is known as the limiting reagent. Since the reaction cannot proceed without this reagent, the amount of product that can be produced is constrained.

The limiting reactant is the one that is consumed first and sets a limit on the quantity of product(s) that can be produced. Calculate how many moles of each reactant are present and contrast this ratio with the mole ratio of the reactants in the balanced chemical equation to get the limiting reactant.

The terms limiting reagent and limiting agent may also be used to describe the limiting reactant.

Thus, option A is correct.

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Santiago's car has an overall average speed of 25 cm/s. If he could increase his car's overall average speed by 10%, what would his car's new overall average speed be?

Answers

Given:

The overall average speed = 25 cm/s.

The overall average speed increased by 10%.

To find:

The new overall average speed.

Solution:

We have,

Overall average speed = 25 cm/s.

The overall average speed increased by 10%. So, the new average speed is

New overall average speed = Initial average speed + 10% of initial  overall average speed

[tex]\text{New overall average speed}=25+\dfrac{10}{100}\times 25[/tex]

[tex]\text{New overall average speed}=25+2.5[/tex]

[tex]\text{New overall average speed}=27.5[/tex]

Therefore, the new overall average speed is 27.5 cm/s.

11/9/2020
Describe the types of possible
weathering that has occurred to
this boulder
Use vocab words to describe what
is happening

Answers

Rainy bc of erosion

Which of the following is a chemical property?
A:
mass
B:
oxidizes in air
C:
boiling point
D:
solubility

Answers

The answer is B.oxidizes in air

Acid rain is an example of _____________ weathering

Answers

Answer:

a chemiacal

Explanation:

Please answer 7-9 i am using alot of my points for this

Answers

Answer:

7... simalair: made of more than 2 things    DIffernt: elemants are made of atoms.

Explanation:

answer correctly for a brainleist! :)

Answers

Answer:

summer

Explanation:

Why because the earth is around the sun the

If an object has a volume of 3 cm3 and has a density of 9 g/cm3. What is the mass of the object?
3 grams
6 grams
27 grams
81 grams

Answers

Answer:

The answer is 27 grams

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question we have

mass = 9 × 3

We have the final answer as

27 g

Hope this helps you

which of the following is NOT a substance?

A. sodium
B. water
C. alcohol
D. air
E. table salt

can select more than one if needed​

Answers

I believe the answer is d Air

Answer:

c. alcohol

it has no substance

Why does the salt reappear when the water evaporates??

Answers

Answer:

Salt particles move about the water. Each particle is surrounded by water molecules.The water particles (molecules) keep the salt particles from rearranging themselves back into a salt crystal. Salt particles are carried throughout the solution surrounded by water particles.

As the water evaporates less and less water molecules are present to keep the salt particles apart. The salt therefore recrystalises and can be collected.

Explanation:

Hope this helped!

-B

Which of the following contains the most atoms?
24.305 g Mg
39.098 gk
21.62 g B
9.0122 g Be

Answers

Explanation:

9.0122 g be Maybe, sorry i don't think so

In the above , the sample of B 21.62 g of boron contains the most atoms because it has approximately 2 moles, while the other samples have only 1 mole each.

What is atoms

The molar mass of each element can be found on the periodic table.

The molar mass of Mg (magnesium) is about 24.305 g/mol.The molar mass of K (potassium) is about 39.098 g/mol.The molar mass of B (boron) is approximately 10.81 g/mol.The molar mass of Be (beryllium) is about  9.0122 g/mol.

To calculate the number of moles in each sample, we divide the mass of each sample by its respective molar mass:

For Mg: Number of moles = 24.305 g / 24.305 g/mol = 1 moleFor K: Number of moles = 39.098 g / 39.098 g/mol = 1 moleFor B: Number of moles = 21.62 g / 10.81 g/mol ≈ 2 molesFor Be: Number of moles = 9.0122 g / 9.0122 g/mol = 1 mole

Therefore, the sample with 21.62 g of boron (B) contains the most atom

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Which statement describes the charging method shown?

The spheres are charged through friction.
The spheres develop the same charge.
Electrons move from the rod to Sphere A.
Electrons move from Sphere A to Sphere B.

Answers

Answer:

D

Explanation:

correct on edge 2021 :)

The movement of the electrons from sphere A to sphere B is shown as the charging method. Thus option D is correct.

What is an electron?

An electron is a negatively charged subatomic particle and can either be free or bound to the nucleus and it exists in a spherical shell. of the various radii that represent the energy levels. The movement of the electron from sphere one to sphere two is represented by the image.

Find out more information about the charging method.

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The energy released in cellular respiration helps an athlete perform. How do you think an athlete might be able to increase cellular respiration?

pls i will give brainliest

Answers

eating healthy foods

working out and eating healthy helps

Answer:

higher as

beacause having  a healthy diet inproves

your health

Explanation:

Quinton answer me or I will never talk to u again pls

Answers

Answer:

huh

Explanation:

plzzz!!! Write the equation for rusting urgently needed​

Answers

Answer:

[tex]Fe_{2} O_{3}[/tex]

Explanation:

Most solid solutes will dissolve ___ at ___ temperatures

A. slower, higher
B. faster, higher
C. faster, lower​

Answers

Answer:

B

Explanation:

The increase in kinetic energy that comes with higher temperatures allows the solvent molecules to more effectively break apart the solute molecules that are held together by intermolecular attractions.

write the number 3000,000,000 in scientific notation

Answers

Answer:

3 x 10^9

Explanation:

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