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Answer:

it would take 2 years

Explanation:

93/55=1.69--->1.70------>2

Answer:

ósea un abrazo

Explanation:

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Answer:

10 ml

Explanation:

The graduated cylinder contains 19 ml of water before the silver pellet is placed inside. Afterwards, the graduated cylinder measures 29 ml of water. Therefore the pellet displaced 10 ml of water. ( 29ml - 19ml = 10ml )

Answer: Groups

Explanation:

The number of valence electrons of an element can be determined by the periodic table groups in which the element is categorized

P.S. Families rows in the table!

Answer:

solids, liquids, gases

Answer:

sruff that has to do wuth vikun=

Explanation:

good job

A wooden baseball bat is an example of a heterogeneous substance.

A heterogeneous substance is consists of compounds that are not thoroughly mixed together.

Woods are fibrous structural substances with spaces present in trees and other woody plants' stems as well as roots. They are composed of a natural composite of cellulose fibers and are contained with a lignin matrix that is capable of resisting compression.

They can use for fire, building, the manufacture of weapons and tools, furniture, as well as paperwork.

Wood is a heterogeneous, highly porous cellular material. It is made up of cells and the cell walls are made up of roughly 40% cellulose, 15% hemicellulose, and lignin of about (15–30%).

Therefore, we can conclude that a wooden baseball bat is an example of a heterogeneous substance.

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Answer:

Equilibrium composition for, no2 =.7365

The equilibrium composition for,  nN2=3.76

Explanation:

Answer:

b

Explanation:

edge 2021

The best describes the light that will cause emission of electrons from a given metal through the photoelectric effect is " light with a high enough frequency. "

When electromagnetic radiation, like light, strikes a substance, the photoelectric effect would be the generation of electrons.

The smallest atom-forming particle is an electron, which has negatively charged.

The photoelectric effect would be a phenomenon where electrically charged particles were released from or contained within a substance as electromagnetic radiation will be absorbed. The effect is often referred to as the emission of electrons from such a metal plate when light strikes it.

Therefore, the correct answer will be option (B).

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Compounds are made of more than one element hence water is made of 2 Hydrogen and one Oxygen, but nacent Hydrogen is single hence it is an element.

Answer:

58

Explanation:

mass number of iron 58 is 58

Answer:

H = 6

O = 6

Fe = 3

Total atoms = 15

Explanation:

3Fe (OH)2

Fe = 1×3

O= 2× 3 = 6

H= 2× 3 = 6

Total atoms = 6+6+3=15

I hope I helped you^_^

Answer:They change

Explanation:

Be more specific the next time you ask a question :)

The volume in liters of 3245 aluminum cans is 24.8 L.

A recycling center collects 3245 aluminum cans and there are 22 aluminum cans in 1 lb. The mass of 3245 aluminum cans is:

[tex]3245 cans \times \frac{1lb}{22cans} = 147.5 lb[/tex]

To convert mass to volume, we need the density of aluminum (5.95 lb/L). The volume corresponding to 147.5 lb of aluminum is:

[tex]147.5 lb \times \frac{1L}{5.95 lb} = 24.8 L[/tex]

The volume in liters of 3245 aluminum cans is 24.8 L.

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Answer:

There are many items that could be altered to test the reaction of another. These changing quantities are called variables. A variable is any factor, trait, or condition that can exist in differing amounts or types. An experiment usually has three kinds of variables: independent, dependent, and controlled.

Explanation:

Answer:wo major scientific discoveries provide strong support for the Big Bang theory: • Hubble's discovery in the 1920s of a relationship between a galaxy's distance from Earth and its speed; and • the discovery in the 1960s of cosmic microwave background radiation.

Explanation:

Answer:

it indicates how long it takes for the material to decay

Explanation:

hope this helps!

The half-life of a radioactive substance indicates how long it takes for the material to decay.

A half life is the amount of time it takes for half of a radioactive substance to decay.

Radioactive isotopes are defined as the isotopes which undergo decay processes very easily. They have very short half life. They are usually the isotopes of heavier elements.

Half life is defined as the time taken for the unstable isotope to fall to half its original value.

Hence, option C is correct.

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Answer:

all of it

Explanation:

my favourite food is pasta.

Answer:3.935g/cm3

Explanation:39.35 g. /10cm3 = 3.935g/cm3

10 cm³ of metallic cylinder has a mass of 39.35 g. The density of this cylinder is 3.935 g/cm³.

Density is a measure of the amount of mass per unit volume of a substance. It is an intensive physical property, meaning that its value does not change depending on the size of the object.

Density is calculated by dividing an object’s mass by its volume.

The density of water is 1,000 kg/m³ at 4°C. The unit of density is kg/m³ (kilogram per cubic meter). The SI unit of density is kg/m³

Density = mass/volume

            = 39.35 g/10 cm³

            =3.935 g/cm³.

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Molecular Mass of water:-

[tex]\\ \sf\longmapsto H_2O[/tex]

[tex]\\ \sf\longmapsto 2(1u)+16u[/tex]

[tex]\\ \sf\longmapsto 2u+16u[/tex]

[tex]\\ \sf\longmapsto 18u[/tex]

[tex]\\ \sf\longmapsto 18g[/tex]

1mole of water weighs 18g

We know

[tex]\\ \sf\longmapsto 1mol=6.023\times 10^23molecules[/tex]

Mass of one molecule:-

[tex]\\ \sf\longmapsto \dfrac{18}{6.023\times 10^23}[/tex]

[tex]\\ \sf\longmapsto 2.98\times 10^24g[/tex]

Answer:

0.373 g

Answer:

B. Light waves or energy

Explanation:

Einstein argued that gravity isn't a force at all. He described it as a curvature of time and space caused by mass and energy.

The unit that is equivalent to 75g is 0.075 kg, 750 dg, and 7.5 dag. The correct options are b, c, and d.

Measuring units are the units used to denote the measurement quantities. There are seven basic measuring units. They are length, Time, Amount of substance, Electric current, Temperature, Luminous intensity, and Mass.

The current unit is given grams, which are used to measure the mass of any object.

1000 grams is equal to 1 kilogram and 1 dg = 0.1 g, and 1 dag = 10 g. So by this formula, each of the quantities can be calculated.  

1 kg = 1000 g

So, 0.075 kg = (0.075 × 1000)g = 75 g

1 dg = 0.1 g

So, 750 dg = (750 × 0.1) g = 75 g

1 dag = 10 g

So, 7.5 dag = (7.5 × 10) g = 75 g

Thus, the correct options are b. 750 dg, c. 7.5 dag, and d. .075 Kg.

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Answer:

222.1

Explanation:

(14+4*1)*2+32.1+16*4+(2*1+16)*5=222.1

Answer:

electron arrangement of Mg is 2.8.2. To reach a stable octet electron arrangement Mg donates 2 electron to oxygen.Hence, Mgo ion formed.

Answer:

1 mol of H2SO4 contains 6.022 x 10^23 molecules. : 0.5 mol of H2SO4 contains 0.5 x 6.022 x 10^23 molecules. = 3.011 x 10^23 molecules . that is 49 g of H2SO4 contains 3.011 x 10^23 molecules of H2SO

Explanation:

Answer:  588.9 lbs

Explanation:  1 lb = 0.454 kg

(267.1kg)*(1 lb/0.454 kg) = 588.9 lbs