When a chemical change occurs:

A) the law of conservation of mass is always obeyed
B) the chemical properties of new substances are different from the ones you started with
C) all of the options are true
D) atoms are rearranged

Answers

Answer 1

Answer:

Are composed together

Explanation:


Related Questions

help help help plsss

Answers

Answer:

4.58×10^3

3.72×10^7

Explanation:

3.8×10^2 =380

+ 4.2×10^3=4200

= 4580 = 4.58×10^3

Which organelle captures sunlight and helps in food synthesis?

Answers

Answer:

Chloroplasts! :)

Explanation:

Hope this helps

Answer:
Chloroplast

Explanation:
Chloroplasts capture the energy in sunlight and use it to synthesize energy-rich carbohydrates. This food made by chloroplasts provides the chemical energy needed by all forms of life. Mitochondria help cells to extract the energy in food molecules efficiently to power cellular activities.

7.62 x 10^23 molecules of CO2 are contained in a tire. How large is the tire (in liters)?​

Answers

Answer: 7.62e+23

Explanation:

what volume of water has a mass of 1 kg

Answers

Answer:

[tex]V=0.001\ m^3[/tex]

Explanation:

Mass, m = 1 kg

The density of water, d = 1000 kg/m³

We need to find the volume of water. The formula for the density of an object is equal to mass divided by volume. Its formula is :

d = m/V

V is the volume of water

[tex]V=\dfrac{m}{d}\\\\V=\dfrac{1\ kg}{1000\ kg/m^3}\\\\=0.001\ m^3[/tex]

So, the volume of water is [tex]0.001\ m^3[/tex].

Answer:

Volume of water has a mass of 1 kg  is explained below in details.

Explanation:

One liter of h2O has a volume of approximately specifically one kilogram when estimated at its maximum frequency, which happens at about 4 °C. It observes, therefore, that thousand of a liter, recognized as one milliliter (1 mL), of h2O has a volume of about 1 g; 1000 liters of h2O has a volume of about 1000 kg (1 tonne).

Which element has an electron configuration that ends in the fourth energy 1 point
level? *
D
ОО
C

Answers

Answer:

here

Explanation:

which is the halogen that is in Period 5? a. iodine (I) b. strontium (Sr) ... 4. Which is a transition element with five d-block electrons in energy level 4? ... Which region contains elements with an electron configuration that ends with p3? a. A b.

Missing: point ‎| Must include: point

I NEED HELP RN 40 POINTS

Answers

Answer:

B.) Adding a source of carbon dioxide to the water.

Explanation:

I had that question too.

can yall help me wit this?

Answers

Answer:

the color change

Mu Cephei is no longer considered a main sequnce star. This means it has run out of:
A:hydrogen
B:Helium
C:Oxygen
D:Iron​

Answers

Answer:

A: Hydrogen

Explanation:

Plz give me brainliest it really helps!

A coffee cup calorimeter contains 153.21 g of water at 22.50 °C. A 65.454 g piece of iron is heated to 101.62 °C. The piece of iron is added to the coffee cup caloriemter and the contents reach thermal equilibrium at 25.68 °C. The specific heat capacity of iron is 0.449 Jg·K and the specific heat capacity of water is 4.184 Jg·K. How much heat, , is lost by the piece of iron?

Answers

Answer:

Q = 2232J

Explanation:

In the system, the energy that is lost by the iron is:

Q = S*ΔT*m

Where Q is heat, S is specific heat of iron ΔT is change in temperature and m is mass of the piece of iron.

S = 0.449J/gK

ΔT = 101.62°C - 25.68°C = 75.94°C

m = 65.454g

Q = 0.449J/gK*75.94°C*65.454g

Q = 2232J

1. Two substances, both solids, start at the same temperature. You transfer
the same amount of energy into both solids, but substance 1 becomes a
liquid before substance 2. Which substance has a stronger molecular
attraction?
A Substance 1
B Substance 2
Please help I will give you Brainlyest

Answers

Answer:

B substance 2

Explanation:

1. Two substances, both solids, start at the same temperature. You transfer

the same amount of energy into both solids, but substance 1 becomes a

liquid before substance 2. Which substance has a stronger molecular

attraction?

A Substance 1

B Substance 2

Please help I will give you Brainlyest

Substance 2 has a stronger molecular attraction.

What are solids?

Solid is one of the four fundamental states of matter. The molecules in a solid are closely packed together and contain the least amount of kinetic energy. A solid is characterized by structural rigidity and resistance to a force applied to the surface.

Both solids are supplied with an equal amount of energy. Out of both substances, substance 2 has a stronger molecular attraction due to which it can not easily change into a liquid while substance 1 has a lesser molecular attraction so supplying of few amounts of heat will change substance 1 into a liquid state.

Hence, Substance 2 has a stronger molecular attraction.

To learn more about solids, click here:

https://brainly.com/question/14424882

What do you think causes a lunar eclipse? (Use your knowledge of solar eclipses and feel free to run the Gizmo to help you.)

Answers

Moon reflects the light frim the sun, thats why we are able to see it and it shines in the night. But, we know that Earth revolves around Sun and Moon revolves around Earth. During this revolution, Earth and Moon comes in a position when Earth is in the middle of the Moon and Sun. So, it blocks the light of Sun frim reaching Moon. Hence, we see no reflection and it causes Lunar eclipse.

Answer:

A total lunar eclipse occurs when the moon and the sun are on exact opposite sides of Earth. Although the moon is in Earth's shadow, some sunlight reaches the moon. The sunlight passes through Earth's atmosphere, which causes Earth's atmosphere to filter out most of the blue light.

Explanation:

Which of the following redox conditions will produce a spontaneous reaction?

A. The voltage of the reduction half-reaction is negative.
B. The voltage of the reduction half-reaction is positive.
C. The sum of the voltages of the half-reactions is negative.
D. The sum of the voltages of the half-reactions is positive. ​

Answers

Answer:

D. The sum of the voltages of the half reactions is positive.

Explanation:

It's correct on apeex

The statement, that describes the redox conditions will produce a spontaneous reaction is "the sum of the voltages of the half-reactions is positive."

What is spontaneous reaction?

A spontaneous reaction is one that favors the creation of products under the conditions of the reaction. It can move in a specific direction without being propelled by an external source of energy. If the standard electrode potential for the redox reaction is positive, the reaction is spontaneous.

If [tex]E^{0}[/tex] (redox reaction) is positive, the reaction will move onward (spontaneous). The redox conditions will cause a spontaneous reaction, and the sum of the half-reaction voltages is positive. Hence the correct option is D.

Learn more about spontaneous reaction here

https://brainly.com/question/13790391

#SPJ2

ANSWER ASAP!
How does a combustion reaction form?

Answers

A combustion reaction is when a fuel, usually a hydrocarbon, reacts with excess oxygen to form carbon dioxide gas and water vapor.
A combustion reaction is a reaction in which a substance reacts with oxygen gas, releasing energy in the form of light and heat. Combustion reactions must involve O2 as one reactant. The combustion of hydrogen gas produces water vapor.

What are the atoms found at the bottom of the periodic table known as?

Answers

They are called lanthanoids!

Separate the following gene sequence into codons: TACGTCTTACGCTATGTC

Answer really quick plssss

Answers

Answer:

I think it's AUGCAGAAUGCGAUACAG

what describes a property of all elements

Answers

Properties of an element are sometimes classed as either chemical or physical. ... Some properties of an element can be observed only in a collection of atoms or molecules of the element. These properties include color, density, melting point, boiling point, and thermal and electrical conductivity.

1. Which of the following is Newton's First Law? *

A-An object in motion will stay in motion unless acted on by a balanced force.

B-An object at rest will stay at rest and an object in motion will stay in motion in the same speed and same direction unless acted on by an unbalanced force.

C-Moving objects will stay in motion forever

Answers

Answer:

B .............

hope it helps

Answer: B

Explanation:

What Phase is water at 120 degrees Celsius?

Answers

At atmospheric pressure water boils at 100 degC.
So the water would be gas/vapor/steam.

An atom has an atomic number of 15 and a mass number of 31. How many protons are there in the atom?

Answers

Answer:

No of protons = 15

Explanation:

Given that,

Atomic number = 15

Mass number = 31

We need to find the no of protons in the atom.

We know that,

No of protons = Atomic no of the atom

No of protons = 15

Hence, there are 15 protons in the atoms.

How many chlorine atoms are on the products side of the reaction 2 Li +
MgCl2 → 2 LiCl + Mg?*

Answers

Answer:

2 chlorine atoms on the product side.

1. In which area are you most likely to find plants that can tolerate water that has a constantly
changing salt content?
A. a freshwater stream
B. an estuary
C. a a pond
D. a coral reef

Answers

Answer:

I would think B, an estuary. But I'm not sure.

Explanation:

The area where the plants should be find in which the water should be tolerated should be estuary.

What is an estuary?

An estuary refer to the enclosed body with respect to the brackish water  that have one or more rivers or streams that should be flow into it. Also, there should be free connection to the open sea. It should be considered as the transition zone that lies between the river environment and maritime environment

Therefore, we can conclude that the option b is correct.

Learn more about plants here: https://brainly.com/question/2725037

Convert 48.5 grams of water to moles of water

Answers

Answer:

2.70 mol of water.

Explanation:

divide the given mass by the molar mass of water. 48.5 / 18.016g = 2.70 mol water.

Write a essay on endangered animals


A: Inquiring and analysing

i. explain and justify the need for a solution to a problem

ii. state and prioritize the main points of research needed to develop a solution to the problem

iii. describe the main features of an existing product that inspires a solution to the problem

iv. present the main findings of relevant research

B: Developing ideas

i. develop a list of success criteria for the solution

ii. present feasible design ideas, which can be correctly interpreted by others

iii. present the chosen design

C: Creating the solution

i. outline a plan, which considers the use of resources and time, sufficient for peers to be able to follow to create the solution

ii. demonstrate excellent technical skills when making the solution

iii. follow the plan to create the solution, which functions as intended

iv. list the changes made to the chosen design and plan when making the solution

D: Evaluating


i. outline simple, relevant testing methods, which generate data, to measure the success of the solution

ii. outline the success of the solution against the design specification

iii. outline how the solution could be improved

iv. outline the impact of the solution on the client/target audience

I WILL IDMEADIITLY MARK U AS BRAINLIESTTT

Answers

Answer:

WHATS OOP Lucy???

help me please i need help cuz its due today

Answers

A is the answer because neither has an advantage meaning the forces are equal

Answer:

I believe the answer is a. I hope this helps

Assignment Summary For this assignment, you will construct a scientific model of the water cycle to show how water is recycled through an ecosystem. Once you have drawn your model on a poster board, you will write one to two paragraphs explaining how water is transferred within and between organisms and the environment. Background Information Water is a very important compound. Organisms need water to carry out life-maintaining processes such as growth and development. Without water, living things will not survive. Water continually flows among the atmosphere, land, water, and living organisms. This process, called the water cycle, allows water to be recycled as it moves through Earth’s spheres. Materials Assignment Instructions Step 1: For this project, you are expected to submit the following: 1. Your model of the water cycle 2. One to two typewritten paragraphs describing the water cycle Step 2: Prepare for the project. a) Read through the guide before you begin so you know the expectations of this project. Pay particular attention to the instructions you need to follow to create a model on your poster board. b) If anything is not clear to you, be sure to ask your teacher. Step 3: Gather materials for the model. a) Start with a blank poster board. Be sure to put your name on it. b) You may either draw the parts of the water cycle or print images to construct a model on your poster board. Gather any drawing tools that you will need, or print any images you want to use. Step 4: Create a model of the water cycle. a) Your model should include bodies of water such as lakes and oceans, organisms, air, and land. b) Draw arrows indicating how water moves within an ecosystem and between organisms and their environment. Be sure to include the Sun and gravity in your model. c) Include short phrases on your poster that summarize what occurs at each stage of the water cycle.  Large poster board  Markers, crayons, or colored pencils  Scissors  Glue or tape Student Guide (continued) Step 5: Write a paragraph describing the water cycle. a) Type one to two paragraphs describing the full water cycle. Be sure to use full sentences and proper grammar.

Answers

Answer:

the water cycle is a system that goes through evaporation then the water goes into the clouds and rains down as preparation

Explanation:

thats the cycle but if I were u I would do more Reasearch

What is the amplitude ?

Answers

Answer: The amplitude is a measure of the strength or intensity of the wave

Explanation: when looking at a sound wave, the amplitude will measure the loudness of the sound.

The bond between sodium and chlorine in the compound sodium chloride (NaCl) is a/an:

Answers

The classic case of ionic bonding, the sodium chloride molecule forms by the ionization of sodium and chlorine atoms and the attraction of the resulting ions. An atom of sodium has one 3s electron outside a closed shell, and it takes only 5.14 electron volts of energy to remove that electron.

To make a balanced equation, 6 H2O + 6 CO2 ---> C6H12O6 + _

Answers

Answer:

6O₂

General Formulas and Concepts:

Chemistry/Biology

Photosynthesis Equation: 6H₂O + 6CO₂ → C₆H₁₂O₆ + 6O₂

Explanation:

Most of the equation comes from the Photosynthesis Equation. Plants take in water and carbon dioxide and sunlight (energy) to produce glucose and oxygen. When we balance the equation and predict reaction. we should get   6O₂ as our answer.

any help would be much appreciated, i'm being timed :( i'll mark brainliest and 5 star

Answers

Answer:

GROUP 16

Explanation:

Answer:

group 2

Explanation:

50 POINTS?!!!!!!

As we approach fall, the trees begin to drop their leaves. If a leaf, with a mass of 0.00006 kg, drops 3.66 meters from the top of a tree and the acceleration due to gravity is 9.81 m/s2. Calculate the force at which the leaf will hit the ground.

(F = m * a)

Answers

I’m getting “5.886 E -4”, so I’m not sure.... It could be 5.8 but its up to you to decide.

All you do is take the mass and multiply it by the acceleration. The meters is there to throw you off.
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