25 Points Please Help ASAP!! View Attached Image!! Will Mark Brainliest If All Are Answered!!

25 Points Please Help ASAP!! View Attached Image!! Will Mark Brainliest If All Are Answered!!

Answers

Answer 1

Answer:

Answers in explanation.

Explanation:

30. A (A chemical changes changes the chemical properties)

31. C (rusting is an example of a chemical change

32. B (A reaction requires energy, so some energy will be expelled)

33. B (Color change is an example of a chemical change)

34. A (The law of the conservation of mass: Mass and Energy cannot be created nor destroyed)


Related Questions

Which term names the longest geologic time frame?

Answers

Answer:

Precambrian

Explanation:

Answer:

An Eon

Explanation:

epcohs are the shortest geologic time frame, which make up periods, that make up eras, that make up eons.

Can somebody please explain the heat formula to me? q=mcΔt
Thank you!!

Answers

Answer:

Explanation:

It describes how much heat must be added to a unit of mass of a given substance to raise its temperature by one degree Celsius. ... The mass m, specific heat c, change in temperature ΔT, and heat added (or subtracted) Q are related by the equation: Q=mcΔT.

Answer:

The formula q=mcΔt explained below

Explanation:

so q represents the amount of heat energy. M is the mass of the object and c is the temperature of the object. Δt also known as delta is the change in temperature. It would be the final temperature minus the original temperature.

name the elements that determine the weather of a place....​

Answers

Temperature, humidity, rainfall, wind speed. Hope this helps :)

they are located between each of the atrium and ventricle to prevent blood from flowing backwards, what is it?​

Answers

Valves, they push blood forward

3. What is SI system? Why has SI system been developed? Give reasons​

Answers

It allows people in different places and different countries to use the same units, avoid mistakes and understand each other more easily. The common base 10 of all units makes it easier and has more accurate calculations that are made without cumbersome conversion factors.
This text is from my science textbook. Hope it helps you




P.S PLS MARK AS BRAINLIST


What is a watt, which is a unit of power,equal to?

A joule divided by a meter
A joule times a meter
A joule times a second
A joule divided by a second

Answers

A joule times a second :)

Answer:

A joule divided a second

Explanation:

i took the test

plz give me brainlist :)

What property of helium could be used to separate it from natural gas?

Answers

Answer: temperature liquefaction

Explanation: At the exact time the only used method or strategy the division of helium from natural gas is low temperature liquefaction

How is the Separation of a Compound different
from that of a mixture?

Answers

a compound is chemically combined and can only be separated by chemical processes. Therefore, it is much harder to separate a compound than a mixture. H2O or water is a compound and Kool-aid is a mixture.

what is meant by the Terrestrial and Hydrologic parts of Earth?

Answers

Not sure what you exactly mean, but I think what you are talking about are the spheres of earth (Lithosphere, Hydrosphere, Atmosphere, and Biosphere.)

Lithosphere (Terrestrial) is the land on earth. Hydrosphere (Hydrologic) is the water on earth.

I'm not sure if this is 100% correct but I'm guessing this is what you are referring to. It could be different across different science classes.

HELP PLEASE! There is a water-filled continental rift in Iceland. What type of plate boundary would cause this rift? *
A. convergent
B. divergent
C. transform

Lithospheric plates move because of the movement of the ___________________________ under them.
A. lower mantle
B. asthenosphere
C. outer core
D. inner core

Answers

1.A- convergent
2.A- lower mantle

Good Luck!!

Answer:

B. Divergent

The rift formed in the Divegent tectonic boundary between the North America and Eurasian Plates and is located now in Iceland (Im sorry im not good at explaining)

What are the main characteristics for the definition of work?

Answers

Answer:

1-There Must be some displacement in the direction of force.                                                  2-Angle between force and displacement is 0°.                                                                            

HELP ME ASAP PLEASE BIG POINTs ​

Answers

Answer:

1.cation

2.anion

Explanation:

the plus is always cation and the negative is anion

Answer:

1. cation

2. anion

Explanation:

A positive ion is always cation and the negative ion is anion

the number of atoms in 2.0 moles of B is

Answers

Answer:

The answer is

1.204 × 10²⁴ atoms of B

Explanation:

To find the number of entities of a substance given it's number of moles we use the formula

N = n × L

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question

n = 2.0 moles

We have

N = 2 × 6.02 × 10²³

We have the final answer as

1.204 × 10²⁴ atoms of B

Hope this helps you

Given :

Number of moles of boron (B) = 2

To Find :

We have to find number of atoms present in the given amount of boron[tex].[/tex]

Solution :

➤ We know that 1 mole of substance contains 6.022×10²³ particles (atoms/molecules).

Avogadro's no. = 6.022 × 10²³

★ Number of atoms present in B :

⭆ N = n × [tex]\sf{N_A}[/tex]

N denotes number of atomsn denotes mole number[tex]\sf{N_A}[/tex] denotes avogadro's number

⭆ N = 2 × 6.022 × 10²³

⭆ N = 12.044 × 10²³

N = 1.2 × 10²⁴

Hope It Helps!

How does the goal of science compare to the goal of
engineering?

Answers

Answer:

The goal of science is compared to engineering because engineering is there to solve problems while science is to explain natural phenomena

Explanation:

How many mL are in 7.3 dL?

Answers

Answer:

730 mL which is .73 L

Explanation:

Use the information below to explain why the atomic radius decreases across a period.

Answers

Answer:

Detail is given below.

Explanation:

Atomic radius  trend along period:

As we move from left to right across the periodic table the number of valance electrons increases. The atomic size tend to decrease in same period of periodic table because the electrons are added with in the same shell. When the electron are added, at the same time protons are also added in the nucleus. The positive charge is going to increase and this charge is greater in effect than the charge of electrons. This effect lead to the greater nuclear attraction. The electrons are pull towards the nucleus and valance shell get closer to the nucleus. As a result of this greater nuclear attraction atomic radius decreases and ionization energy increases because it is very difficult to remove the electron from atom and more energy is required.

we can see in picture A there is one positive charge and force of attraction is 2.30×10⁻⁸ N

In picture D there are 2 positive charge and force of attraction is 4.60×10⁻⁸ N

So by increasing the positive charge force of attraction also increases.

In F we can see there is more positive charge thus force of attraction is also greater.

Definition of periodic trends

Answers

Periodic trends are specific patterns in the properties of chemical elements that are revealed in the periodic table of elements. Major periodic trends include electronegativity, ionization energy, electron affinity, atomic radii, ionic radius, metallic character, and chemical reactivity.

what is the mass number? plz help!

Answers

Answer:

I believe it is 2?

Explanation:

;v;

17 POINTS!!! JUST DO A B C D PLS!!!! PLS DONT COMMENT IF YOU DONT KNOW IT ITS DUE BY TOMORROW AND I CANT KEEP WASTING POINTS PLS

Answers

Answer:

A B C D E

Explanation:


What is the relationship between a white dwarf and black dwarf?

Answers

Answer:

No longer emitting heat or light, the white dwarf will become a black dwarf. Because it emits no radiation, it is nearly impossible to see. However, the black dwarf would still retain its mass, allowing scientists to detect the effects produced by its gravitational field.

Explanation:

Answer:

white dwarfs are hot, black dwarfs are cold

Explanation:

a white dwarf is a slowly burning and aging corpse of a main sequence star such as our sun. they are up to 40 times hotter then the sun, ranking among one of the hottest objects in the universe, except their luminosity is so low that all their heat stays in them basically forever.

On the other hand, a black dwarf is a theoretical ending to a white dwarf, over the course of trillions of years, white dwarfs cool down into black dwarfs. black dwarfs rank among the coldest possible temperature. We aren't sure if these are really a thing, because we still haven't given white dwarfs enough time to cool down.

the order of particle in all substance is the same
A True
B false​

Answers

Answer:

false false false false

Mrs. K is trying to rearrange her living room. She uses 150 N of force to move a 600 g table. The table does not move. How much work is done?

90,000 J

4 J

600 J

0 J

Answers

Answer:

0J

Explanation:

Work = Force * Distance

Since the distance (or the displacement) in this problem is 0, hence, no work is done. W = 150*0 = 0. The mass of the object is just trying to trick you. Hopes this helps!

Which expression represents the number 0.00017 written in scientific notation?
A.1.7 x 10-3
B.1.7 x 103
C.1.7 x 104
D. 1.7 x 10-4

Answers

Answer:

D

Explanation:

Move the decimal and count the places

The answer to this question is : D

(Plz help ASAP) List at least three different sources used for naming organisms

Answers

Answer:

kingdom, phylum, class, order, family, genus and species.

Explanation:

Periodic trends
PLEASE HELP ME OUTT!! I WILL GIVE BRAINLIEST!​

Answers

Answer:

A. Ba

C. Cu

D. H

Explanation:

HOPE THIS HELPS

Please help me!! Look at the picture to understand the question please!

Which of these red outlined elements is most similar to Chlorine (CL)?

A. He
B. I
C. AI

Answers

Answer:

C. I

Explanation:

The elements are categorized in groups and periods. The periods are horizontal and the groups are vertical. The elements in the same group (vertical) have very similar characteristics.

the final step of the scientific method is to ____ the results​

Answers

Answer:

The final step of the scientific method is to communicate the results​

When you put water into a hot metal pan of equal mass, why does the pan cool down more than the water heats up ?​

Answers

Answer:

The specific heat of water is greater than that of the metal

Explanation:

When water is put into a hot metal pan of equal mass, we discover that the pan cools down more than the water heats up because heat is rapidly transferred from the pan to the water.

This happens because the specific heat capacity of water is much greater than that of the pan hence heat is more quickly transferred from the pan to the water.

What is the correct formula for calcium dihydrogen phosphate?

A) CaH2PO4
B) Ca(H2PO4)2
C) Ca(H2HPO4)2
D) Ca2H2PO4

Answers

Answer:

B) Ca(H2PO4)2

Explanation:

To solve this we must be knowing each and every concept related to chemical formula.  Therefore, the correct option is option B among all the given options.

What is chemical formula?

The chemical formula is indeed a means of expressing information about just the chemical proportion of atoms that comprise a certain chemical compound as well as molecule through the use of chemical element numbers and symbols.

Furthermore, the molecular formula does not contain any words and does not serve as a chemical name. However, it just indicates basic chemical structures and is not the same as the entire chemical structural formula.  The correct formula for calcium dihydrogen phosphate is Ca(H[tex]_2[/tex]PO[tex]_4[/tex])[tex]_2[/tex].

Therefore, the correct option is option B among all the given options.

To know more about  chemical formula, here:

https://brainly.com/question/29031056

#SPJ2

Nitrogen-7 configuration

Answers

Explanation:

Electronic configuration of Nitrogen -

₇N = 1s² 2s² 2p³

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