Consider equal mole samples of dinitrogen monoxide, aluminum nitrate, and potassium cyanide. Arrange these compounds in increasing order of number of nitrogen atoms in each sample.

a. aluminum nitrate
b. potassium cyanide
c. dinitrogen monoxide

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.

Answer:

The answer for this is (B: Heat)

Answer:

it would take 2 years

Explanation:

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

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:

the importance of the periodic table are,

To summarize, the periodic table is important because it is organized to provide a great deal of information about elements and how they relate to one another in one easy-to-use reference. The table can be used to predict the properties of elements, even those that have not yet been discovered.

Explanation:

hope its help for you

thank you

have nice day

Answer:

please I don't understand the question, rewrite it

Answer:

AU is homoatomic

Explanation:

Homo-atomic Molecule: Molecules provided by unique one variety of particles are associated as Homo-atomic molecules

Ex: H2, N2, P4 etc.

Hetero-atomic Molecule: Particles constituted by several kinds of atoms are identified as Hetero-atomic molecules

Ex: CO2, NO2, CH4, HCl etc

As AU is homoatomic because this element is formed by only one atom

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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!

We want to perform some changes of units, such that the number of significant figures (the ones different than zero) does not change.

a) 75 cm to ft

We know that:

1ft = 30.48cm

1 = (1ft)/(30.48cm)

Now, remember that if we multiply a quantity by one we do not affect the quantity, so we can write:

75cm = 75cm*(1ft)/(30.48cm) = 2.5 ft

b)  0.668 kg to lb

we know that:

1kg = 2.20462 lb

then:

1 = (2.20462 lb)/(1kg)

0.668 kg = 0.668 kg*(2.20462 lb)/(1kg) = 1.47 lb

c)  0.549 uL to qt

We know that:

1 uL = 3.437*10^-9 qt

1 = (3.437*10^-9 qt)/(1 uL)

Then:

0.549 uL = 0.549 uL*(3.437*10^-9 qt)/(1 uL) = 1.91*10^-9 qt

d) 9.991 mm to km

we know that:

1mm = 1*10^-6 km

then:

1 = (1*10^-6 km)/(1mm)

So we can rewrite:

9.991 mm = 9.991 mm*(1*10^-6 km)/(1mm) = 9.991*10^-6 km

e)  313 nm to mm

We have:

1nm = 1*10^-6 mm

1 = ( 1*10^-6 mm)/(1 nm)

Then:

313 nm*( 1*10^-6 mm)/(1 nm) = 3.13*10^-4 mm

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Answer:

solids, liquids, gases

eu vou colocar V(verdadeiro) F (falso)

1:F  

2:F

3: V

4:F

explicação:

1 procariontes não apresentam núcleo

2 eles podem sim caso  contrário os seres procariontes não sobreviveriam

3   ele possui organelas celulares

4 as células eucariontes são maiores e mais complexas.

CONCLUSÃO: a resposta certa é a 3

Answer:

There are 1609.344 meters in a mile

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:

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.

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]

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:

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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Answer: 3 cm

Explanation:

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:

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:

some of them not believe in God

Answer:

222.1

Explanation:

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

Density is simply defined as the mass per unit volume of a substance. Mathematically, it is expressed as:

[tex]Density = \frac{mass}{volume }[/tex]

To solve the question given above, we'll begin by calculating the volume of the metal. This can be obtained as follow:

Volume of water = 25 mL

Volume of water + metal = 46.5 mL

Volume of metal = (Volume of water + metal) – (Volume of water)

Volume of metal = 46.6 – 25

Finally, we shall determine the density of the metal. This can be obtained as follow:

Mass of metal = 254 g

Volume of metal = 21.5 mL

[tex]Density = \frac{mass}{volume }\\\\Density = \frac{254}{21.5} \\[/tex]

Therefore, the density of the metal is 11.81 g/mL

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Taking into account the definition of density and change of units, if a container is strong enough to hold 62.0 pounds (lb) of gasoline, you can put 10.3184 gallons in there.  

First you must know that density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space.

In other words, density is the relationship between the weight (mass) of a substance and the volume it occupies (that same substance). Then, the expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

[tex]density=\frac{mass}{volume}[/tex]

On the other side, the rule of three is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them.

That is, what is intended with it is to find the fourth term of a proportion knowing the other three.  

If the relationship between the magnitudes is direct, that is, when one magnitude increases, so does the other (or when one magnitude decreases, so does the other) , the direct rule of three must be applied.

To solve a direct rule of three, the following formula must be followed, where a, b and c are known values ​​and x is the value to be calculated:

a ⇒ b

c ⇒ x

So, [tex]x=\frac{cxb}{a}[/tex]

The direct rule of three is the rule applied in this case where there is a change of units. To perform conversion of units from pounds to grams, you must first know that 1 lb = 453.59 g. So, if 453.59 g is 1 lb, how many grams equals 62 lb?

[tex]mass= \frac{62 lbx453.59 g}{1 lb}[/tex]

Solving:

mass= 28122.58 grams

Then, you know:

Replacing in the definition of density:

[tex]0.720\frac{g}{cm^{3} }=\frac{28122.58 g}{volume}[/tex]

Solving:

volume×0.720 [tex]\frac{g}{cm^{3} }[/tex]= 28122.58 g

[tex]volume=\frac{28122.58 g}{0.720\frac{g}{cm^{3} }}[/tex]

volume= 39059.14 cm³= 39059.14 mL= 39.05914 L (being 1 cm³= 1 mL= 0.001 L)

Now, to perform conversion of units from L to qt, you must first know that 1 qt = 0.94635 L. So, if 1 qt is 0.94635 L, how many qt equals 39.05914 L?

[tex]volume= \frac{39.05914 Lx1 qt}{0.94635 L}[/tex]

Solving:

volume= 41.2735 qt

Finally, to perform conversion of units from qt to gal, you must first know that 1 gal = 4.0000 qt. So, if 1 gal is 4 qt, how many gal equals 41.2735 qt?

[tex]volume= \frac{41.2735 qtx1 gal}{4 qt}[/tex]

Solving:

volume= 10.3184 gal

In summary,  if a container is strong enough to hold 62.0 pounds (lb) of gasoline, you can put 10.3184 gallons in there.  

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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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