Chemistry High School

PLEASE HELP ILL MARK BRAINLIEST

Answers

Answer 1

Answer:

1. true

2. existing matter

3. the materials simply turn into gases you cannot see

hope that helps! ☺

plz mark Brainliest!

Related Questions

Calculate the concentration of a 220 g solution of calcium chloride (CaCl2) that has a volume of 11 L

Answers

Answer: The concentration of the solution is 0.18 M

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

[tex]Molarity=\frac{n}{V_s}[/tex]

where,

n = moles of solute

[tex]V_s[/tex] = volume of solution in L

moles of [tex]CaCl_2[/tex] = [tex]\frac{\text {given mass}}{\text {Molar mass}}=\frac{220g}{111g/mol}=1.98mol[/tex]

Now put all the given values in the formula of molality, we get

[tex]Molarity=\frac{1.98mol}{11L}=0.18M[/tex]

Therefore, the concentration of the solution is 0.18 M

En una planta de energía, se produce CO2 gracias a la reacción de combustión del material orgánico con oxígeno para producir CO2, SO2, SO3, NO, NO2 y H2O que son los causantes del efecto invernadero, el SO2 reacciona con H2O para formar H2SO3, causante de la lluvia ácida. En condiciones de gas ideal el SO2 se encuentra a una temperatura de 100°C y 0,5 atm de presión, el volumen ocupado generalmente es de 25 L. 5. La ecuación para hallar el número de moles debe ser: a. Gases ideales: relación entre todas las variables que influyen sobre los gases b. Boyle: relación entre volumen y presión c. Charles: relación entre el volumen y la temperatura d. Gay Lussac: relación entre la presión y la temperatura

Answers

Answer:

a. Gases ideales: relación entre todas las variables que influyen sobre los gases

Explanation:

La ecuación del gas ideal da la relación entre las variables; presión, volumen, temperatura y número de moles.

Según la ecuación del gas ideal; PV = nRT

P = presión del gas

V = volumen del gas

n = Número de moles del gas

R = constante de gas

T = temperatura del gas

El número de moles de SO2 se obtiene de;

n = PV / RT

n = 0,5 * 25 / 0,082 * 373

n = 12,5 / 30,586

n = 0,41 moles

Which substances in the list can be used to write a complete combustion reaction? (4 points)
O 1, 2, and 3
O 2, 3, and 6
O 1, 4, and 5
O 1, 2, and 5

Answers

Answer:

B. 2, 3 and 6

Explanation:

The primary materials for a chemic combustion reaction are Fuel + O2 → CO2 + H2O!

Hope this could help! （*＾ワ＾*）

Answer:the answer is B

Explanation:

Two rocks one weighing 100m and the other weiging 200n are drpped from a 50-m cliff at the same time when both rocks are 10m from the ground and air friction is ignored which is the same

Answers

Answer:

Ignore all friction

If magnesium and nickel were used as electrodes to construct an electrochemical cell like the one shown at right, which metal would form the anode and which the cathode?

anode:

cathode:

Answers

Answer:

anode: magnesium

cathode: nickel

Explanation:

edg. 2021

Explain how a long-term environmental change can lead
to the development of a new species.( its a paragraph

Answers

Answer:

Humans are modifying the world in many ways, and not all of them for the better. The changes we cause are often severe challenges to animals, plants and microbes in nature, from the introduction of pathogens or exotic invasive species to adding toxic substance or excessive nutrients, or causing climatic change. Often several changes occur at once. Nelson Hairston's lab focuses on freshwater environments, especially lakes and ponds, where some of the species present respond to environmental change with decreases in their numbers, even to the point of extinction, while others may benefit to excess, becoming so dominant that they present problems, as in the case of harmful algal blooms stimulated by nutrient enrichment or climate warming. Hairston's lab studies how individual species, food webs, and whole ecosystems are altered when the environment changes.

One way that some freshwater organisms respond to environmental change is to evolve rapidly. A marked change in the environment favors some characteristics of plants, animals and microbes over others. These character differences are often genetically based so that favored characteristics may increase in the next generation. The shorter the generation time, the faster this evolutionary change can occur. For example, tiny but abundant plankton, eaten by fish and other larger animals, can become adapted to the changed environment within a few years because their generation time is only a few days. Hairston's lab has shown that planktonic "water fleas" (Daphnia), major consumers of suspended algae in lakes, evolved to be tolerant of harmful algae within a decade of the appearance of blooms. This rapid evolution (termed "evolutionary rescue" in conservation biology) raises many intriguing questions, for all environments, not just freshwater: To what extent can we rely on species adapting rather than going extinct when their environment changes? How does the evolution of a species that plays a critical ecological role alter the interactions it has with other species, and the functioning of the entire ecosystem?

how many protons electrons and neutrons does the following isotopes contain 1H+

Answers

Answer:

The other name for this isotope is a proton. This is because it contains just a single proton.

Explanation:

H+

Protons = 1

Electrons = 1 - 1 = 0 (The + sign means it has lost a single electron)

Neutrons = 0

Can somebody just name all the metalloids, gases, and liquids that are on the periodic table. please this is due in a hour!!!

Answers

Answer:

There are six liquid elements present in the periodic table. They are bromine,mercury ,caesium,gallium,rubidium and francium.

The metalloids; boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te), polonium (Po) and astatine (At) are the elements found along the step like line between metals and non-metals of the periodic table.

The gaseous element group; hydrogen (H), nitogen (N), oxygen (O), fluorine (F), chlorine (Cl) and noble gases helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn) are gases at standard temperature and pressure (STP).

Explanation:

Mr Singh is cooking using wo pans of oiling water. Both pans are made of steel, but one pan has a much thicker base than the other pan. Explain how energy is transferred through the metal pans. Write about particles in your answer.

Answers

Answer:

Answer:

because it's composed of two elements, hydrogen and oxygen. water is technically a molecular compound tho, for it has two hydrogens.

Formula for tricarbon hexoxide

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Tetracarbon dioxide is an oxide of carbon, a chemical compound of carbon and oxygen, with chemical formula C4O2 or O=C=C=C=C=O. It can be regarded as butatriene dione, the double ketone of butatriene . Chemical formula
C4O2
Molar mass
80.042

How do I do nunber 8?

Answers

Answer:

DONT CLICK THAT LINK THAT IS HACK AND VIRUS

Explanation:

.
Characteristics of a Group of Elements
Do not conduct electricity
• Mostly gas, but brittle when solid
Has 7 valence electrons
.
Which of these elements is in this groun?

Answers

Answer:

Gas

Explanation:

I dunno but a lucky guess i guess

classify the following elements under metals, non metals and metalloids, boron, zinc Mercury, silicon, oxygen, nitrogen, sodium

Answers

Answer:

Zinc mercury transition metal

Silicon boron metalloid

Oxygen nitrogen non metal

Sodium alkali metal

Explanation:

How are beef and gas productions related to methane levels?

Plzzz answer quick

Answers

Answer:

Cows and other ruminant animals (like goats and sheep) emit methane, a potent greenhouse gas, as they digest grasses and plants. This process is called “enteric fermentation,” and it's the origin of cows' burps.

Explanation:

A sample containing 0.75 moles of CO2 would contain how many atoms?

Answers

Answer:4.5 ×10^22)

Explanation:

no. of particles =no. of mole×avogadro's number of particles no. of particles =0.75×6.02×10^23 no. of particles =4.5 ×10^22

The number of protons is equal to
a the number of neutrons.
b the atomic mass.
c the number of electrons.
d the atomic number.

Answers

Answer:

c the number of electrons

4) What mass of hydrogen is formed when 2.00g of magnesium
Mg + H2SO4–>H2SO4

Answers

Answer: 0.16 g H2

Explanation:

Mg+ H2SO4= MgSO4 + H2

Atomic massof Mg is 24

Molecular mass of H2 is 2

So,

24g Mg produce 2 g H2

1g Mg produce (2÷24)= 0.083 g H2

2.00g Mg produce (0.083×2) g H2

= 0.16 g H2

0.16g of hydrogen is formed when 2.00g of magnesium.

The mass of hydrogen gas formed when 2.00g of magnesium is equal to 0.165 g.

What is the balanced chemical equation?

The chemical equation of a reaction is said to be a balanced equation when the number of atoms of substances is equal on either side of the equation.

Evergy balanced chemical equation must follow the law of conservation of mass according to which the total mass of the substances present on the reactant side should be equal to the total mass of substances present on the product side.

Given, the balanced chemical equation of the reaction of Mg and sulfuric acid:

[tex]Mg + H_2SO_4 \longrightarrow MgSO_4 +H_2[/tex]

One mole of magnesium produces hydrogen gas = 1mol

Given the mass of magnesium = 2g

The number of moles of Mg = 2/24.3 = 0.082 mol

Then the number of moles of hydrogen gas formed = 0.082 mol

The mass of the hydrogen gas = 0.082 × 2 = 0.165 g

Learn more about the balanced chemical equation, here:

brainly.com/question/15052184

#SPJ2

3Ba(C2H3O2)2 + 2K3PO4 ⟶ Ba3(PO4)2 + 6KC2H3O2

If 4.36 mol of potassium phosphate react, how many grams of barium phosphate are produced?

Answers

Hello Mistyann!

First you need to know amount of barium phosphate is

Half of potassium phosphate, also 2.18 mol.

Molar mass of Barium phosphate is 3·137.2 + 2·(30.97+4·16) g/mol

You can calculate it yourself dear.

Now mass is amount of substance · molar mass.

It has been an honour to teach you, dear,

God bless!

A physical change to a substance

can never be reversed

increase or decrease the mass of a substance

changes to type of matter the substance is made of

changes one or more of the physical properties of a substance

Answers

Answer:

4th one

Explanation:

a physical change is something u can see, so if the substance changes its properties then thats a physical change.

Can someone tell me if these are right? I am supposed to be decoding this for my escape room but it seems to be wrong.

Answers

Answer:

Q1 is A.

Q2 is right

Q3 is D.....I dont

really know about this one

Q4 is right

1. A wave has a frequency of 800 Hz and a wavelength of 2000 cm. What speed
is this wave traveling?

Answers

Answer:

V=f*(wavelength)

V= (800)(20m)

16000m/s

Explanation:

Other Questions

Consider this reaction: NH4+ + HPO42 NH3 + H2PO4Which is the conjugate base?NH4+ NH3HPO42H2PO4 Janice has decided that the best approach to programming a new social media app is to start with a small portion of it by writing the smallest module, and then reuse and combine that with other modules to build it up. What approach is this?Group of answer choicesbinary translationbottom-up programmingfloat and decimal variablesalgorithm management 5(2 + (9)) + (25) :( Please Help I need to finish this by the end of the day! plz answer im running out of time ill give brainiest!! Suppose three engineers come to you with a plan for a disruptive, yet-to-be developed software program that seems compelling. They are asking for $10 million, the amount they think they will need over the next three years to reach cash flow positive. They have a pitch deck that includes a proposed deal. They are offering you 25% of the company. The founders own the remaining 75%. You will buy common stock, and are entitled to one of four seats on the board of directors; they hold the other three seats. One slide in the deck contains a detailed prediction of the value of the company. If you invest $10 million, you will own shares that are worth at least $50 million at the end of the third year.Required:a. What do you think of this proposed deal?b. What counteroffer would you make? Tristan joined a local land conservation advocacy group because he cares passionately about protecting green spaces. Through his involvement in the group, he became friends with a number of the members. He began spending time with them outside of group meetings and events, getting drinks after work and going on hikes on the weekends. This is an example of which of the following?a. a reference group becoming a secondary groupb. a reference group becoming a primary groupc. a secondary group becoming a primary groupd. a primary group becoming a secondary group Someone help please! Extra points & brainlest! Sunny makes a poster showing the levels of organization in the human body.How can Sunny correct his error? Check all that apply.Arrow A should point to the organ system.Arrow B should point to the cell.Arrow B should point to the organ.Arrow C should point to the muscle tissue.Arrow C should point to the organ system. Use the following balanced reaction to solve:P4 (s) + 6H2 (g) 4PH3 (g) How many grams of phosphorus trihydride will be formed by reacting 60 L of Hydrogen gas with an excess of P4? Round 8 5/9 to the nearest whole number. 9 10 7 8 The equation of a circle is x^2 + y^2 = 56.25 The nutritional chart on the side of a box of a cereal states that there are 87 calories in a 3/4 cup serving. How many calories are in 8 cups of the cereal? Which sentence best summarizes how the mystery was solved?A The carrier is called "The Blue Ghost" because it was reported tohave sunk four times during World War II.B The class figured out that the pelican had mistaken the silvercamera for a fish.C Harrison brilliantly realized that the camera was on an antenna.D Harrison should not have brought his camera with him becauseit created a big problem. whats 2 other ways to write this equation:40 = 19+7x Do you think police officer nowadays still follow the police operational procedure in conducting their operation ? How was the construction of Maya temples related to the Maya religion? A cylinder has a radius of 5 inches and height of 20 inches.which is the surface area of the cylinder?1. 1187 square inches2. 517 square inches 3. 3077 square inches 4. 785 square inches When John Lewis was offered the opportunity to sue the state of Alabama in order to be admitted to Troy College, his parents refused. Why didn't they support John's efforts to attend the school? What was their viewpoint as it relates to Blacks living in the rural south? Explain in 3-5 sentences. * I need help on this and the person who answer this correctly gets a BRANLIST(answer if you know)