helooo i need help please :)

Answers

Answer 1

It is a ,d and c just make sure tho

Related Questions

If a reaction is endothermic,
1 point
More energy is released when the bonds in the products are formed than is used to
break the bonds in the reactants
The temperature increases
The same amount of energy is used to break the bonds of the reactants as is released
when the bonds in the products are formed
О O
It takes more energy to break the bonds of the reactants than is released when the
bonds in the products are formed

Answers

Answer: It takes more energy to break the bonds of the reactants than is released when the bonds in the products are formed

Explanation:

Endothermic reactions are defined as the reactions in which energy of the product is greater than the energy of the reactants. The total energy is absorbed in the form of heat. Thus it takes more energy to break the bonds of the reactants than is released when the bonds in the products are formed

Exothermic reactions are defined as the reactions in which energy of the product is lesser than the energy of the reactants. The total energy is released in the form of heat. Thus More energy is released when the bonds in the products are formed than is used to break the bonds in the reactants

The total mass of the __________________ and __________________ in an atom is the atomic mass.
Fill in the blanks Plzz

Answers

Answer:

protons, neutrons

Explanation:

There are three subatomic particles in all atoms: protons, neutrons and electrons. Of these three, only protons and neutrons are considered to have enough mass to contribute to overall atomic mass of the element.

(Help would be greatly appreciated, chemistry is not my strong suit) How many moles of NaCl are present in a solution with a molarity of 8.59M and 125mL of a solution?
1. 1.07g
2. 62.7mol
3. 1.07mol
4. 62.7g

Answers

Molarity is a unit of concentration defined as the number of moles of solute (the substance being dissolved) per volume of solution (the solvent in which all the solute is dissolved). Mathematically, molarity is expressed as

[tex]M = \frac{\text{ mol solute}}{\text{ L solution}}[/tex].

In this question, we are given the molarity and the volume of a solution of NaCl. We can use this information to calculate the number of moles of NaCl present in the solution. Rearranging the equation to solve for moles of solute, we multiply the molarity by the volume of the solution (the units for volume must be in liters, so 125 mL is expressed as the equivalent 0.125 L):

[tex](8.59 \text{ M})(0.125 \text{ L}) = 1.07 \text{ moles of NaCl}.[/tex]

The question asks for the number of moles of NaCl in this solution, so number 3 would be correct.

True or false, the torch that is carried to the Olympic cauldron to be lit, is ignited by a match

Answers

Answer:

true

Explanation:

What are bacteria? Chapter 7 lesson 2 AYU

Answers

Answer:

a group of unicellular microorganisms

Answer:

bacteria are a type of biological cell,they constitute a large domain of prokaryotic microorganisms,single celled. The cells are all prokaryotic . This means they do not have a nucleus or any other structures which are surrounded by membranes . ... Bacteria also have small, closed-circles of DNA called plasmids present in their cytoplasm

Explanation:

Why the bond in water molecule os polar covalent bond, while than in chlorine molecule is pure covalent bond? Give reason?

Answers

Explanation:

The unequal sharing of electrons between the atoms and the unsymmetrical shape of the molecule means that a water molecule has two poles - a positive charge on the hydrogen pole (side) and a negative charge on the oxygen pole (side). We say that the water molecule is electrically polar.

Which formula equation represents the burning of sulfur to produce sulfur dioxide?

Answers

Answer

The balanced reaction that describes the reaction between sulfur and oxygen to produce sulfur dioxide is expressed S(s) + O2 (g) = SO2 (g). In many manufacturing plants, sulfur dioxide is furhter reacted to oxygen to form sulfur trioxide then added with water to produce sulfuric acid.

Explanation: The balanced reaction that describes the reaction between sulfur and oxygen to produce sulfur dioxide is expressed S(s) + O2 (g) = SO2 (g).

Answer:

The balanced reaction that describes the reaction between sulfur and oxygen to produce sulfur dioxide is expressed S(s) + O2 (g) = SO2 (g). In many manufacturing plants, sulfur dioxide is further reacted to oxygen to form sulfur trioxide then added with water to produce sulfuric acid.

Name the type of light interaction feeling hotter in a black shirt than a white shirt
1. Reflected
2. Absorbed
3. Transmittied

Answers

It’s absorbed The outer layer of fabric does get hotter because the black color absorbs more heat. And that heat doesn't get transmitted to the skin because of the thick fabric. But thin black clothing transmits that heat to the skin, making a person hotter

which substance will evaporate first???????????????????

Answers

Answer:

I think it would be a liquid.

Explanation:

If the temperature hits a certain point, it will turn to ice. If the ice gets exposed to heat, it will melt and return back to it's natural form, a lqiuid. If the liquid is exposed to enough heat, it will evaporate. Not sure if this is right, but I tried my best!

Call each of your flowers as water employee increase rate of growth

Answers

Okay ...................x

each side of a square is 8 by 10 metre find the area of the square

Answers

Answer and Explanation:

I believe the answer is 8

I believe it’s 8 if not please tell me at least

To investigate the effect of salt water on a cell, a researcher places one cell sample in freshwater and a second cell sample in salt water. After six hours, the researcher observes and sketches the two cells as shown. What change in the cells occurred during the six hours the cells remained undisturbed? A.Osmosis occurred in the salt water cell sample because the water from inside the cell moved out of the cell to a lower concentration, causing the cell to shrink. B.Osmosis occurred in the freshwater cell sample because the water from outside the cell moved into the cell to a higher concentration, causing the cell to grow. C.Osmosis occurred in the salt water cell sample because the salt from outside the cell moved into the cell to a lower concentration, causing the cell to shrink. D.Osmosis occurred in the freshwater cell sample because the salt from inside the cell moved out of the cell to a higher concentration, causing the cell to grow.

Answers

Answer:

MARK ME BRAINLIEST

Explanation:

MARK ME BRAINLIEST

Single-celled organisms need a microscope to be seen...
O True
O False

Answers

Answer:

True

Explanation:

Microscope is an instrument which is used to observe small objects. There are many types of microscope with a different magnitude.

Sulfuric acid is an important chemical in industrial production of many products. In the “old” days, it was called oil of vitriol. It is commonly dyed brown now to alert people to its hazards because it is hugely corrosive. It is commonly found in car batteries. What is the molarity of 25.9 moles of sulfuric acid dissolved in 4.00 L of solution?

Answers

Answer:

6.475 M

Explanation:

Number of moles = 25.9 moles

Volume = 4.00 L

Molarity = ?

The relationship between the quantities is given as;

Molarity = Number of moles / Volume

Molarity = 25.9 / 4

Molarity = 6.475 M

Calculate the number of moles that are in 2.0 L of a 0.75 M solutions of NaCl

Answers

Answer:

1.5

Explanation:

0.75M=Moles/2L

Which pH values indicate an acid soil?

Answers

Answer;

They indicate the acidity level. That is, the less pH, the more acidic

Hope it helps :)

Help me pretty please

Answers

Answer:

Explanation:

Answer:

I think ur answer would be C.)

Explanation:

hope this helps

How do human change the Earth's surface?

Human activities such as overpopulation can change the Earth's surface.
Human activities such as driving cars can change the Earth's surface.
Human activities such as mining and deforestation can change the Earth's surface.
Human activities such as poaching can change the Earth's surface.

Answers

I believe it is C “Human activities such as mining and deforestation can change the Earth’s surface”

Answer:

Human activities such as mining and deforestation can change the Earth’s surface

Explanation:

Summarize how a dinosaur can become a fossil.

Answers

The dinosaur dies and is washed away in a flood. The body is buried in sediment (mud or sand) and eventually the body is covered. ... Eventually, the fossil skeleton comes to the surface and is discovered.

True or false The difference between solids and liquids is that solids have definite shape and volume, while liquids have no define volume

Answers

Answer:

False

Explanation:

Answer:

true! :) hope it helps

A velocity-time graph shows how what changes over time?

Answers

Answer:

A velocity-time graph shows how velocity changes over time. The sprinter's velocity increases for the first 4 seconds of the race, it remains constant for the next 3 seconds, and it decreases during the last 3 seconds after she crosses the finish line.

How many total atoms are in one molecule of Pb(C2H2O2)2?
A) 9
B) 14
C) 3
D) 15

Answers

, shows that its molecules contain one S atom and two O atoms; calculate its molar mass. molecules, which consist of 6.02 x 1023 S atoms and 2(6.02 x 1023) O atoms.
The answer is C,(3)

Why can more sugar be dissolved in hot water than cold water (more solute be dissolved in hot solvent then cold solvent)

Answers

sugar dissolves faster in hot water than it does in cold water because hot water has more energy than cold water. when water is heated, the molecules gain energy and because of that, move faster. as they move faster, they come in contact with the sugar more often, causing it to dissolve faster.

How do you figure out the final temperature or the initial temperature in calorimetry.

Answers

Add the change in temperature to your substance's original temperature to find its final heat. For example, if your water was initially at 24 degrees Celsius, its final temperature would be: 24 + 6, or 30 degrees Celsius.

What does a TRAAP test stand for

Answers

Answer:

TIMELINESS, RELEVANCE, AUTHORITY, ACCURACY and PURPOSE.

Explanation:

hope it helps!

Answer: TRAAP stands for Timeliness, Relevance, Authority, Accuracy and Purpose.

Explanation:

Solid aluminum metal reacts with chlorine gas to produce aluminum chloride crystals. How many grams of
aluminum chloride will be produced if the reaction begins with 135.0 g Al and 75.0 g chlorine gas? Write the balanced equation. Determine the limiting reactant and determine how much excess reactant will be left over. show your work.

Answers

Sort of hard but it is 56.8

56.8g of aluminum chloride will be produced if the reaction begins with 135.0 g Al and 75.0 g chlorine gas.

What is mass?

A body's mass is an inherent quality. Prior to the discovery of a atom or particle physics, it was widely considered to be tied to the amount of matter inside a physical body. It was discovered that, despite having the very same quantity of matter in theory, different atoms and elementary particles have varied masses.

There are various conceptions of mass in contemporary physics that are theoretically different but physically equivalent. The resistance of the body to acceleration in the presence of a net force can be measured experimentally as mass. The gravitational pull an object has on other bodies is also influenced by its mass.

2 Al + 3 Cl[tex]_2[/tex] → 2 Al C l[tex]_3[/tex]

mole of Al = 135.0/ 26=5.19mol

mole of Cl[tex]_2[/tex] = 75.0/ 35 =2.14 mol

mass of aluminum chloride = 56.8g

Limiting reagent = Al

excess reactant = Cl[tex]_2[/tex]

Therefore, 56.8g of aluminum chloride will be produced if the reaction begins with 135.0 g Al and 75.0 g chlorine gas.

To know more about mass, here:

https://brainly.com/question/28704035

#SPJ2

Brainliest to right answer

Answers

Answer:

False

Explanation:

The outer core is a liquid and is made out of nickel and copper

The answer is fake there is magma in the core

Which gases in the following list exist as separate atoms: hydrogen, helium, nitrogen, oxygen, neon.

Select one:
a. Hydrogen and helium
b. Helium and nitrogen
c. Helium and neon
d. Oxygen and nitrogen

Answers

helium and neon ( answer C)

The answer is C tell me if I was wrong

Difference between Solute and solvet

Answers

Answer:

When one substance dissolves into another, a solution is formed. The solute is the substance that is being dissolved, while the solvent is the dissolving medium. Solutions can be formed with many different types and forms of solutes and solvents.

What is an equilibrium constant?

A. A constant relating the effects of activation energy and temperature on the reaction rate

B. The value of the rate of the forward and reverse reactions at equilibrium

C. The amount of energy required for the collision of two molecules to result in a reaction

D. The ratio of equilibrium concentrations of products to concentrations of reactants

Answers

Answer:

Explanation:well first you gotta animalize in your brain what you think would happen in this case D would explain what an equilibrium constant is

Answer: D

Explanation:

The ratio of equilibrium concentrations of products to concentrations of reactants

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