Chemistry High School

please help me its due today thanks :D

Answers

Answer 1

Answer:

true

Explanation:

Answer 2

Answer: true

Explanation: it absorbs heatt

Related Questions

molecules are always moving no matter what phase they are in solid liquid gas

true or false

Answers

Answer:

Solids - vibrational (and rotational); moving very slowly.

Liquids - vibrational, rotational, and translational; moving quickly.

Gases - vibrational, rotational, and translational; moving very quickly.

Explanation:

Particles are always moving. No matter what. There is a certain point where they move so slowly it is considered minuscule, but they are in fact moving.

Thus, in solids, liquids, and gases, you can expect particles to move in a certain trend. That trend is average kinetic energy of the particles and the forces holding them together (attraction).

An atom with which atomic diagram is most similar to calcium?

Answers

Answer:

Explanation:

Calcium is an element with a total of 20 electrons.

It has 4 shells with a configuration of:

2, 8, 8, 2

Option C is the most similar to calcium but the number of shells is not complete.

It still requires two more shells with 8 and two electrons respectively.

True or False: Neutrons have both a positive and negative charge

Answers

Answer:

false

Explanation:

Answer:

false

Explanation:

Describe the ammonium ion, NH4+, and the sulfate ion, SO42-. What compounds would these ions form with potassium and fluoride ions? Write the formula units for the resulting compounds.

Answers

Explanation:

Ammonium Fluoride and Potassium Sulphate

Which term means finding ways to describe and explain the natural world
through observations and experiments?
A. Pseudoscience
B. Philosophy
C. Chemistry
D. Science

Answers

Answer:

D. Science i think

Explanation:

Which structure is a valid representation of a hydrocarbon molecule?

Answers

Im pretty sure it is the first one

melting is considered a(n) ___ change because energy is gained by the substance as it changes state
A. Physical.
B. Chemical.
C. Volume.
D. Dynamic.

Answers

melting is a physical change

Please help :(
I just need the bottom true or false part

Answers

Answer:

if you mean question 21

true

Explanation:

sorry if wrong

question is
P2O5 a ionic or covalent bond, its covalent right?

Answers

Yes it is ========== covalent bond

Answer:

Covalent

Explanation:

A general clue that a compound is covalent is two nonmetallic elements bonded together. There is the sharing of electrons but no transfer or formation of ions like there is in ionic bonding.

1 mol of titanium,
Ti, is 47.88 g is that true?

Answers

Answer: True.

Explanation:

Molar mass is the mass of a given substance divided by the amount of that substance, measured in g/mol. For example, the atomic mass of titanium is 47.88 amu or 47.88 g/mol. In 47.88 grams of titanium, there is one mole, or 6.022 x 1023 titanium atoms.

The characteristic molar mass of an element is simply the atomic mass in g/mol. However, molar mass can also be calculated by multiplying the atomic mass in amu by the molar mass constant (1 g/mol). To calculate the molar mass of a compound with multiple atoms, sum all the atomic mass of the constituent atoms.

For example, the molar mass of NaCl can be calculated for finding the atomic mass of sodium (22.99 g/mol) and the atomic mass of chlorine (35.45 g/mol) and combining them. The molar mass of NaCl is 58.44 g/mol.

agree or disagree that a scientific theory can be modified provide evidence along!!!!!!!

Answers

Answer:

I agree.

Explanation:

why do chemical equations have to be equal

Answers

Answer:

Every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. Therefore, there must be the same number of atoms of each element on each side of a chemical equation.

Explanation:

YW :)

A 2.9 kg model rocket accelerates at 15.3 m/s2 with a force of 44 N. Before launch, the model rocket was not moving. After the solid rocket engine ignited, hot gases were pushed out from the rocket engine nozzle and propelled the rocket toward the sky.

Which of Newton’s laws apply in this example? Check all that apply.

Answers

Answer:

newton's firts law

Explanation:

because it states that everybody continue its state in rest unless an external force is appy to change its state from rest to motion.

Answer:

A, B, C

Explanation:

From smallest to largest put these in order of their atomic radius Mg, Ba,
Sr, Ca
O Ca, Mg, Ba, S
O Ra, Sr, Ca, Mg
Mg, Ca, Sr, Ra
Mg, Sr, Ra, Ca

Answers

Answer:

Explanation:

i jus did it

Which event most likely occurs at point V?

cooling
erosion
heating
melting

I will mark Brainlyest and 20 points

Answers

[tex]\mathfrak{\huge{\pink{\underline{\underline{AnSwEr:-}}}}}[/tex]

Actually Welcome to the Concept of the Geography.

Answer is 1.) Cooling.

On cooling of magma, we get the hardened igneous rocks in the nature.

Answer:

Cooling

Explanation:

I did quiz

Which of the choices is an example of an element?
O CO
O Co
O C2H2O2
O CO2

Answers

Answer:

Co(cobalt) is the answer

Explanation:

Cobalt is a chemical element with the symbol Co and atomic number 27. Like nickel, cobalt is found in the Earth's crust only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal.

Please help!!! I can’t figure it out!

Answers

Answer:

The third answer

Explanation:

please help me anyone its due today thank you !

Answers

true

Explanation:

Ecothermic reactiions are reactions or processes that release energy. From heat or light.

A.True

Explanation:

Reactants+Products+Energy

plssss help for a and b and if possible pls give an explanation but you don’t have to!

Answers

Answer:

0 net force it is balanced

Explanation:

If the amount of force is the same on both sides the net force equals 0

What is the mass of an object that is accelerated 4 m/s2 by a force of 180 N?
kg
Asap!!!!!!!

Answers

Answer:

The answer is 45 kg

Explanation:

The mass of the object can be found by using the formula

[tex]m = \frac{f}{a} \\ [/tex]

f is the force

a is the acceleration

From the question we have

[tex]m = \frac{180}{4} \\ [/tex]

We have the final answer as

45 kg

Hope this helps you

Answer:

I am so sorry but I need pts...

Explanation:

How many moles of
C
O
2
COX
2

will be produced from
97.0
g
97.0 g97, point, 0, start text, space, g, end text of
C
3
H
8
CX
3

HX
8

, assuming
O
2
OX
2

is available in excess?

Answers

Answer:

Im highy

Explanation:

What is the pressure inside a 2.0 L bottle filled with 0.25 mol of carbon dioxide gas at 25 °C?

Answers

Answer:

3.1atm

Explanation:

Given parameters:

Volume of gas = 2L

Number of moles = 0.25mol

Temperature = 25°C = 25 + 273 = 298K

Unknown:

Pressure of the gas = ?

Solution:

To solve this problem, we use the ideal gas equation.

This is given as;

PV = nRT

P is the pressure

V is the volume

n is the number of moles

R is the gas constant = 0.082atmdm³mol⁻¹K⁻¹

T is the temperature

P = [tex]\frac{nRT}{V}[/tex]

Now insert the parameters and solve;

P = [tex]\frac{0.25 x 0.082 x 298}{2}[/tex] = 3.1atm

I need help with the bottom part of the paper

Answers

Answer:

ur really pretty :)

Explanation:

which best explains why a scientist would share these details in a conference?

a it tells the audience if the results support or contradict the hypothesis

b it tells the peers if the study is supported by mathematical models

c it informs the peers of the results are supported by other scientists

d it informs the audience if the study included controlled tests

Answers

The question is incomplete, the complete question is; During a conference presentation, a scientist described the materials that she used and how she performed her experiments.

Which best explains why a scientist would share these details in a conference?

It tells the audience if the results support or contradict the hypothesis.

It tells the peers if the study is supported by mathematical models.

It informs the peers if the results are supported by other scientists.

It informs the audience if the study included controlled tests.

Answer:

It informs the audience if the study included controlled tests.

Explanation:

Usually, scientific conferences involve presentation of papers by scientists. These paper presentations are actually the sharing of details of the scientific research carried out by other scientists.

Presenting the materials and methods section of the a research project to a scientific conference informs the audience if the study included controlled tests.

The inclusion of controlled tests in a scientific study enhances the validity of the results obtained in the study.

You are at a carnival fun house standing 3m in front of a lens with a focal length of 2.5m. What would happen to your image if the lens was concave? What would the image look like if the lens was convex?

Answers

The convex lens would produce a virtual

How many grams are in a sample of 0.55 mol of K?

Answers

The equation you use here is
mass =moles x Mr

So:
Moles of K - 0.55mol
Mr of K - 39.1

Mass= 0.55x39.1 =21.505g

What mass of NO2 can be produced when 678 mL of oxygen at STP and 256 grams of NH3 are mixed together?

Answers

Answer:

WHT55

Explanation:

i experianced this before

How much water (H2O ) would form if 4.04 g of hydrogen (H2) reacted with 31.98 g of oxygen (O2 )?
(2H2 + O2 2H2O)

Answers

Answer:

Mass = 36 g

Explanation:

Given data:

Mass of water formed = ?

Mass of hydrogen = 4.04 g

Mass of oxygen = 31.98 g

Solution:

Chemical equation:

2H₂ + O₂ → 2H₂O

Number of moles of hydrogen:

Number of moles = mass/molar mass

Number of moles = 4.04 g/ 2 g/mol

Number of moles = 2.02 mol

Number of moles of oxygen:

Number of moles = mass/molar mass

Number of moles = 31.98 g/ 32 g/mol

Number of moles = 1.0 mol

Now we will compare the moles of water with hydrogen and oxygen.

O₂ : H₂O

1 : 2

H₂ : H₂O

2 : 2

2.02 : 2.02

Number of moles of water formed by oxygen are less thus oxygen will limiting reactant.

Mass of water:

Mass = number of moles × molar mass

Mass = 2 mol × 18 g/mol

Mass = 36 g

what is the conclusion of Rutherford atomic model?

Answers

Most of the space inside the atom is empty because most of the α-particles passed through the gold foil without getting deflected. Very few particles were deflected from their path, indicating that the positive charge of the atom occupies very little space.

Which of these elements is the most chemically reactive?
A zinc (Zn)
B. iron (Fe)
C. potassium (K)
D. germanium (Ge)

Answers

Answer:

a zinc is the most reactive

Other Questions

What is the best response to the following question?Para qu deporte usamos una red (net)?el ftbol americanoel bisbolel tenis Read this excerpt from a NASA report titled Cosmic Fountain Powered by Giant Black Hole. Use the skills demonstrated in this lesson to define any unfamiliar words and make sure you understand the passages main ideas.Cold gas falls toward the central black hole, like water entering the pump of a fountain. Some of this infalling gas . . . eventually reaches the vicinity of the black hole, where the black hole's gravity causes the gas to swirl around with ever-increasing speeds, and the gas is heated to temperatures of millions of degrees. This swirling motion also creates strong electromagnetic forces that launch high-velocity jets of particles that shoot out of the galaxy.What is the MOST accurate summary of this excerpt?A)Cold gas moves rapidly toward the black hole. When it is close enough to be affected by the black holes gravity, the gas begins to pulse faster and faster as it becomes very hot. The pulsing motion produces forces from the electric field that cause particles to bounce around the galaxy at very low speeds.B)Cold gas moves toward the black hole. When it is close enough to be affected by the black holes gravity, the gas begins to swirl faster and faster as it becomes very hot. The swirling motion produces forces from the electric and magnetic fields that cause particles to shoot out of the galaxy at very high speeds.C)Cold gas moves slowly toward the black hole. When it is close enough to be affected by the black holes gravity, the gas begins to flare up and becomes very cold. The flares produce forces from the magnetic field that cause particles to shoot out of the galaxy at very moderate speeds.D)Hot gas moves toward the black hole. When it is close enough to be affected by the black holes gravity, the gas begins to build up and it becomes very bright. This buildup produces forces from the electric and magnetic field that cause particles to disappear into the galaxy in a matter of seconds. Fill in the blanks with proper or common noun.1. I went to _______ during my holidays.2. Look! here comes________ Factor f(x)=x3+x2-17x+15 if f(3) =0 QUICK I'LL GIVE BRAINLIEST!Read the map.A map titled Physical Features of East Asia. A key shows Lowlands in green, Highlands in yellow, and mountains with brown triangles. The Gobi desert is in Mongolia north of China. The East China Sea and South China Sea form the China coast. The Taklimakan desert is in eastern China between the Himalaya Mountains to the south and the Gobi desert to the north. The Himalayas are along the southern border between China and India.Which physical feature was the most difficult barrier to trade with India?the Himalayasthe Gobi desertthe Yellow River the Pacific Ocean Which rank does David seem to hold in the given scenario? David works in the police force. He is mainly in charge of crime prevention, detection, and maintaining order. He works at the rank of a . How does the structure of bone allow it to function with the immune system? (PLEASE HELP QUICK THEYRE COMING) Most of the mass in an atom is found in the...? HELP ME ASAP!!!!Select the correct answer.Gina is scuba diving when she notices a large fish glide over her. It has a flattened body and she notices gills on its underside. Which taxonomicgroup does the fish belong to?A.SelachiiB.BatoideaC.SarcopterygiiD.Actinopterygii What type of angles are these? Corresponding, vertical, alternate interior, alternate exterior, or adjacent angles. underline the pronounsThey lived very close to each otherWho are you looking forwhose book is thisHe played the game withe us what is the function of carbonhydrates in organisms Tavares is saving for a $350 cell phone.He already has $60 and plans to save an additional $20 per week?How many weeks will Tavares have to save before he can buy the cell phone ? Read the excerpts from part 3 of "An Occurrence at Owl Creek Bridge."A rising sheet of water curved over him, fell down upon him, blinded him, strangled him! The cannon had taken a hand in the game. As he shook his head free from the commotion of the smitten water he heard the deflected shot humming through the air ahead, and in an instant it was cracking and smashing the branches in the forest beyond.***A whiz and rattle of grapeshot among the branches high above his head roused him from his dream. The baffled cannoneer had fired him a random farewell. He sprang to his feet, rushed up the sloping bank, and plunged into the forest.***As he is about to clasp her he feels a stunning blow upon the back of the neck; a blinding white light blazes all about him with a sound like the shock of a cannonthen all is darkness and silence!What function does the motif of the cannon serve throughout the story?The cannon continually pushe John was playing cricket due to Eric influence .Do you think Eric was a good influence? Which inequality is shown in the graph? Please Help me in my Homework... Describe what the legal ramifications are for having sexual relations with minors. 9.How is nominal GDP converted into real GDP?O by eliminating the effects of price increases on GDP growthO by adding all incomes earned to total expenditures by consumers, businesses, and governmentO by adding the contributions of American-owned factories in foreign countriesO by adding up all of the real purchases made in the economy How the Right of Occupancy can be transferred or exchanged.