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Approximately how many grams of KBr will dissolve in 100g of water at 50C?


60g

70g

80g

90g

5.00 mol O₂

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

3.01 × 10²⁴ atoms O₂

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 3 sig figs.

4.99834 mol O₂ ≈ 5.00 mol O₂

Answer:

Powdered sugar , it has much more surface area for the state change to occur over

Explanation:

I hope this helps.

Precipitation.

Humidity is the amount of water vapour in the air. This is produced by the evaporation

of water from oceans, lakes, rivers, wetlands and plants.

When water evapour in the air cools, it condenses. In other words, it becomes liquid and

forms little drops. These droplets form clouds.

When the droplets are small, they remain suspended in the atmosphere. But they often

become colder and their size and weight increases When they become too heavy to

remain suspended in the air, they fall to the Earth’s surface. We call this precipitation,

which may be rain, snow or hail.

Factors affecting precipitation.

Different areas of the Earth’s surface receive different amounts of precipitation.

 Latitude: it rain more in the areas near the equator than in the temperature

zones and polar regions. The temperature is higher near the Equator so there is

more evaporation.

 Altitude: it rains more in high areas than in low areas.

 Level of humidity: it rains more on the coast than inland. Seas are a source of

humidity.

Precipitation is measured in millimeters (mm) per square matre.

Answer:

The chemistry of a soap molecule is such that one end of it has a polar covalent bond, while the tail is make up of carbon and hydrogen atoms that have non-polar bonds.

Answer:

In a physical change, the substances involved retain their original properties. A new substance is not formed. A physical change can be reversed. Chemical changes happen on a molecular level when two or more substances chemically bond together.

Mending a broken bone  is a chemical change as to heal the bone enzymes are released which are chemicals.

Chemical changes are defined as changes which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical change.

There are several characteristics of chemical changes like change in color, change in state , change in odor and change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.

There are three types of chemical changes:

1) inorganic changes

2)organic changes

3) biochemical changes

During chemical changes atoms are rearranged and changes are accompanied by an energy change as new substances are formed.

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Answer:

B. Stretching a rubber band.

Explanation:

Explanation:

"The skeletal system works as a support structure for your body. It gives the body its shape, allows movement, makes blood cells, provides protection for organs and stores minerals"

Answer:

True

Explanation:

Because Carbon is the primary component of macromolecules, including proteins, lipids, nucleic acids, and carbohydrates.

Answer:

True!

Explanation:

All living things contain carbon in some form. Carbon is the primary component of macromolecules, including proteins, lipids, nucleic acids, and carbohydrates. Carbon's molecular structure allows it to bond in many different ways and with many different elements. So therefore, its true (:

Answer:c

Explanation:

No cap

Answer:(1)The urinary system's function is to filter blood and create urine as a waste by-product.

(2) two kidneys we have.

(3)The kidneys act as very efficient filters for ridding the body of waste and toxic substances, and returning vitamins, amino acids, glucose, hormones and other vital substances.

(4)Two ureters. These narrow tubes carry urine from the kidneys to the bladder. Muscles in the ureter walls continually tighten and relax forcing urine downward, away from the kidneys.

(5)A hollow, muscular, balloon-shaped organ that expands as it fills with urine.

(6)The urethra is the vessel responsible for transporting urine from the bladder to an external opening in the perineum.

(7)Urine is formed in the kidneys through a filtration of blood. The urine is then passed through the ureters to the bladder, where it is stored. During urination, the urine is passed from the bladder through the urethra to the outside of the body.

Explanation:

Answer; 2.531 moles

Explanation:

Answer:

500 hits

Explanation:

If 20 hits equal 1 web 1 futz equal 2 geese 10 webs equal to 1 futz How many hits are equal to 5 geese?

Solution:

Given that:

20 hits = 1 web, 1 futz = 2 geese; 10 webs = 1 futz

10 webs = 1 futz; hence:

1 web = 1 web * 1 futz / 10 webs = 0.1 futz

1 web = 0.1 futz

1 futz = 2 geese; hence:

0.1 futz = 0.1 futz * 2 geese / 1 futz

0.1 futz = 0.2 geese

Therefore, 1 web = 0.1 futz = 0.2 geese

1 web = 0.2 geese

This means that 20 hits = 1 web = 0.2 geese

20 hits = 0.2 geese

5 geese = 5 geese * 20 hits / 0.2 geese

5 geese = 500 hits

Answer:

Let’s get back to simple physics and the laws of motion. Your car and everything in it are traveling in a given direction, to stop in requires force be applied in the opposite direction over a period of time. This occurs extremely quickly in an accident and the force is greater because the time the opposing force is acting on the vehicle is very short. The airbag system is designed to offer you protection from the violent forces exerted on you during an accident.

There are three main components to your airbag system, the bag, the inflator and the sensor. The sensor must register a collision force roughly equal to hitting a brick wall at 10 to 15 mile per hour before it will trigger the airbag inflation. Once tripped the airbag system inflates through a chemical reaction between sodium azide (NaN3) and potassium nitrate (KNO3) which creates nitrogen gas. An igniter is set off which quickly burns the chemical fuel and creates the gas needed for expansion. The bag then blows out of its storage in a split-second. Immediately after inflation, when the chemical burn is complete, the airbag begins to deflate as the gasses escape from holes in the fabric.

Explanation:

Answer:

Bacteria can evolve quickly because they reproduce at a fast rate.

Explanation:

Bacteria can evolve quickly because they reproduce at a fast rate. Mutations in the DNA of bacteria can produce new characteristics. A random mutation might cause some bacteria to become resistant to certain antibiotics, such as penicillin.

18 B 19 C and 20 A

cuz that's it I hope it helps you

Answer:

a

Explanation:

Answer:

a

Explanation:

answer: bits of rock rusting when exposed to oxygen and water

Explanation: i think because when it rains the water is left and freezes and night making the rock expand or start to Rust

Answer:

A) Bacteria is essential to making nitrogen usable.

B) Denitrification returns nitrogen to the atmosphere.

D) Fertilizers containing nitrogen are carried in runoff to lakes and rivers.

Explanation:

The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmosphere, terrestrial, and marine ecosystems. Thus option A, B and D.

Nitrogen cycle is defined as a biogeochemical process that converts inert nitrogen in the atmosphere into a form that living organisms can use.

It can also be defined as a cyclical process in which nitrogen travels through both living and nonliving things,

There are seven steps of nitrogen cycle.

Biogeochemical cycle is defined as the process by which a chemical substance cycles through Earth's biotic and abiotic compartments.

Thus, the nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmosphere, terrestrial, and marine ecosystems. Thus option A, B and D.

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Answer:

i dont know04487448700

Answer:

Visible light waves let you see the world around you. The different frequencies of visible light are experienced by people as the colors of the rainbow.

Explanation:

Answer:

Explanation:

The balanced chemical equation is Cl2 + 2KBr → 2KCl + Br2. The amount of bromine is calculated as follows:

11.0 g KBr (1mol KBr/119.002g KBr * 1mol Br2/2mol KBr * 159.808g Br2/1mol Br2= 7.39 g Br2.)

The balanced chemical equation is Cl₂ + 2 KBr → 2 KCl + Br₂.7.39 g  of bromine are produced by the complete reaction of 11 grams of potassium bromide.

The Chemical equation is a symbolic representation of a chemical reaction is written in form of symbols and chemical formulas.The reactants are present on the left hand side while the products are written on the right hand side of the chemical equation.

A plus sign is written between reactants and products if they are more than one reactants or products  in any case and an arrow is present which points towards the product side which indicates the direction of the reaction in which it is proceeding.There are coefficients present next to the chemical symbols and formulas .

The balanced chemical equation is Cl2 + 2KBr → 2KCl + Br2. The amount of bromine is calculated as follows:

11.0 g KBr  which is  1 mole of  KBr/119.002 g KBr × 1 mole of  Br₂/2 mole KBr × 159.808 g Br₂/1 mole of  Br₂= 7.39 g Br₂.

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Answer:

D. It is an exothermic reaction and energy is released from the system

Explanation:

Hope it helps you in your learning process.

Answer:

This chemical equation means: One mole of solid copper plus two moles of aqueous silver nitrate produce one mole of copper(II) nitrate plus two moles of solid silver. This is a single replacement reaction in which the metal copper replaces the metal silver.

Explanation:

Hope this help

yes you do need to multiply it by 22.4

The proton number has the highest value in the ion

In an atomic element Q, the mass number is the number of the proton and the neutron, the electron encircles around the nucleus of the atomic element.

Recall that:

∴

The atomic element Q+ has a positively charged ion, Thus, the proton number in the mass of the atomic element Q, therefore, has the highest value in the ion.

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