Chemistry High School

Pls help I'll give Brainliest!!!!!

Answers

Answer 1

Answer:

Reactants

Explanation:

because a reactant is a substance or compound added to a system to cause a new product

Related Questions

MARKING BRAINLIEST :)
Which property has a trend similar to that of electronegativity?
A. First ionization energy
B. Atomic radius
C. Ionic radius
D. Atomic mass

Answers

Answer:

Explanation:

There are various kind of elements that are present in periodic table. Some elements are harmful, some are radioactive, some are noble gases. Therefore, the correct option is option A.

What is periodic table?

Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number.

Periodic table help a scientist to know what are the different types of elements are present in periodic table so that they can discover the new elements that are not being discovered yet.

Along period, electronegativity increases. along group electronegativity decreases. The same trend is followed by first ionization energy in periodic table.

Therefore, the correct option is option A.

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Plants combine water (liquid) and carbon dioxide (gas) to make sugar (solid) during photosynthesis. This is an example of__.

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Answer:

Explanation:

It' an example of photosynthesis and plants make oxygen and suger (glucose). Hope this helped

please helllllllllllllllllllllllllllllllp

Answers

So what you dos is the final temperature - the initial temperature. For example for 1) we have 88.5 celsius degrees - 78 celsius degrees = 10.5 celsius degrees.

ain the energy transformation that occurs when a hair dryer is plugged in and turned on.

Group of answer choices

Chemical energy transforms into electrical and sound energy.

Electrical energy transforms into mechanical and thermal energy.

Mechanical energy transforms into chemical and electrical energy.

Thermal energy transforms into electrical and gravitational energy.

Answers

Answer:

Mechanical

Explanation:

Since, this mechanical energy gets converted into thermal energy due to which hairs get dry. Thus, we can conclude that the energy transformation that occurs when a hair dryer is plugged in and turned on is that electrical energy transforms into mechanical and thermal energy.

How does the concentration of ions in a strong acid differ from a weak acid?

Answers

Answer:

A strong base has a much smaller concentration of positive ions (hydrogen ions) and a much greater concentration of negative ions (hydroxide ions). The weak base has a much greater concentration of positive ions (hydrogen ions) and a much smaller concentration of negative ions ( hydroxide ions) = answer !!

Explanation:

I need helppppppppppp

Answers

A B C

a. Mg(12) 2.8.2 -2e- = Mg2+

b. S(16) 2.8.6 +2e- = S2-

c. MgS

d. No, because it is neutral

. A car accelerates at a constant rate in a straight line.
The velocity of the car increases from 4.9 m/s to 6.4 m/s in 3.00 minutes.
Calculate the acceleration of the car.
Give your answer to 3 significant figures.

Answers

Answer:

The acceleration of the car is 0.0273.

Explanation:

We can find this by using the acceleration formula which is:

a = ( vf - vi ) / Δt

a is acceleration.

vi is the initial velocity.

vf is the final velocity.

When we substitute into the equation we get. . .

a = ( 6.4 - 4.9 ) / 3

and when we solve this equation we get 0.02734

Hope this helps. . . <3

Hand warmers and instant cold packs use _____ that release or absorb thermal energy.

Answers

Answer:

Hand warmers and instant cold packs use Endothermic that release or absorb thermal energy.

Hand warmers and instant cold packs use endothermic reaction that release or absorb thermal energy.

What is thermal energy?

Thermal energy is defined as by virtue of its temperature, a system in a condition of thermodynamic equilibrium contains internal energy. Fossil fuels like natural gas, coal, and oil are examples of thermal energy sources. They also include solar heat, electric heat pumps, and geothermal heat. Thermal energy is a type of kinetic energy, which is energy brought on by motion, and is brought on by the motion of particles. Things have an interior temperature as a result of thermal energy, which can be detected with a thermometer.

Endothermic reaction is defined as the chemical processes that result in the formation of products when the reactants absorb heat energy from their surroundings. A chemical reaction or physical change is referred to as being endothermic when heat is absorbed by the system from the environment. An endothermic process causes the system to absorb heat from its surroundings, which causes the surroundings' temperature to drop.

Thus, hand warmers and instant cold packs use endothermic reaction that release or absorb thermal energy.

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Answer:

The answer is D.

Explanation:

Volume (V) = l x w x h

V = 4 x 5 x 1.2

V = 20 x 1.2

V = 24

Density = Mass/Volume or D = M/V

D = 85,000/24

D = 3541.66666666

Explain why sodium loses one electron and chlorine gains one electron in three or more sentences.

Answers

Answer:

Sodium and chloride form an ionic bond. Therefore the sodium atom loses one electron from its outer shell and the chlorine atom gains one electron. As this happens, the electron is transferred from the sodium atom to the chloride atom and so both atoms become ionic and have a full outer shell.

The density of butter is 0.86 g/cm3. what is the mass of 240 cm3 of butter?

Answers

Answer:

mass= 206.4 g

Explanation:

Density= mass/volume

0.86=x/240

x=240×0.86

=206.4g

The density of butter is 0.86 g/cm³. 206.4g is the mass of 240 cm³ of butter. The phrase "specific volume" is occasionally used in thermodynamics to refer to a substance's reciprocal of its density.

Density, mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre. For example, the density of water is 1 gram per cubic centimetre, and Earth’s density is 5.51 grams per cubic centimetre. Density can also be expressed as kilograms per cubic metre (in metre-kilogram-second or SI units). For example, the density of air is 1.2 kilograms per cubic metre.

Density= mass/volume

0.86=x/240

x=240×0.86

=206.4g

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the maximum internal receiving temperature for fresh poultry is:

Answers

It should be noted that the maximum internal receiving temperature for fresh poultry is 41°F.

Temperature simply refers to the measure of hotness or coldness which is expressed in several scales. It's the manifestation of thermal energy in a matter.

It should be noted that the key to limiting the bacterial growth of food is to control the temperature. The maximum acceptable receiving temperature for fresh poultry is 5°C (41°F).

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An object experiences a net force to the right that gives it an acceleration of 2.0 m/s2. If the net force is doubled then the new acceleration of the object will be ???

Answers

Answer:

The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.

A person has a mass of 80.0 kg on
Earth, what would their mass be on
Mercury, which has 1/3 the gravity of
Earth?
A. more than on the Earth
B. less than on the Earth
C. the same as on earth

Answers

Answer:

The same as on earth

Explanation:

mass is the amount of matter in an object and the mass of an object is always the same at any point in time

gravity will only have effect on the weight and not the mass.

so assuming the question was talking about the weight, then we can say the weight will be lesser on Mercury

What is the pH of a solution if [H+] = 1.0 x 10-5M? *
1 point
5.00
7.00
11.00
50.0

Answers

Answer:

5.00

Explanation:

because ignoring the pH solution part and doing the math it comes around to 1.0x5.0 which 1 times anything is itself so its 5

Help on this question please

Answers

Answer:

Option 4

Explanation:

Velocity is the rate at which the position changes

In a compound, chemical energy is _______________ when bonds break.

a
absorbed

b
released

c
both A and B

d
neither A or B

Answers

I think its B, however not 100% sure. Hope that helped, sort of

Which of the following actions will not increase the rate at which a solid dissolves in
a liquid?
using smaller particles of the solid
O lowering the temperature of the system
O increasing the surface area of the solid
stirring the solid and the liquid

Answers

Answer:

O lowering the temperature of the system

Plz help ASAP
Dgdhhd

Answers

Answer:

Same As.

Explanation:

Mass will not increase or decrease because matter is not created or destroyed. The Law of Conservation of Mass states that the mass of a system must remain constant throughout. Energy is conserved.

24.) In humans animals and plants the DNA is found in the?

Answers

Answer:

chromosome

Explanation:

Answer:

Most of the DNA in all animals, humans, and plants is found in the cell nucleus. Humans, animals and plants contains both DNA and RNA in the cell nucleus and they have to be present in all because every organisms structure and function directly depends upon them.

Explanation:

A sturdy plant is placed in an airtight, transparent container. The entire experiment is then weighed. For 10 days, the plant grows inside the container. After 10 days, the container is weighed again. The air inside the container is pumped out and carefully analyzed.

What is true about the air inside the container and the mass of the experiment?
-The air is richer in carbon dioxide. The mass of the experiment has not changed
-The air is richer in oxygen. The mass of the experiment has changed.
-The air is richer in carbon dioxide. The mass of the experiment has changed.
-The air is richer in oxygen. The mass of the experiment has not changed.

Answers

Answer:

Explanation:

bye

Explain how living
on the moon would be similar
to going camping.

Answers

Answer:

you will die because no air

Why does the atomic radius increase from top to bottom?

Answers

go to Russia and ask them. they know a lot about nukes

Explain why the number 1,085 is NOT a perfect square

Answers

1085 is a perfect square if the square root of 1085 equals a whole number. The square root of 1085 is not a whole number. 1085 is not a perfect square root.

Do you want to play again?

what happens to the atoms during a chemical reaction

Answers

Answer:

Atoms get rearranged and make up different molecules. No atoms are created nor destroyed.

Explanation:

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