How many moles of argon, Ar, are in 1.63×1024 Ar atoms?

Answer:

Platinum

Explanation:

Answer:

C

Explanation:

Measurements are always specific numerical values that you observe. Taking your temperature results in a number. Reading your watch results in a specific time that you get. Weighing a cantaloupe results in a specific measurement in kilograms or pounds. Asking the weather will result in an answer, like sunny or rainy, which aren't specific numerical values.

The following is not an example of making a measurement is asking for weather as it depends on weather reports. option C is correct.

A  weather report is what  tells you about the high and low temperatures for the past day o weather the rain is going to happen or not which can be predict only.

Weather report also tells you the present temperature of the day and may  tell you the average temperature for the day which can only be predict cannot be measured in any aspect.

Therefore, following is not an example of making a measurement is asking for weather as it depends on weather reports. option C is correct.

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Answer:

The symbol is the right answer.

Explanation:

The “ Symbol” is the correct answer because chemist uses the letters of the alphabet to denote the element. For instance, the element oxygen is denoted by the letter of the alphabet “O”, the hydrogen is denoted by the letter of alphabet “H”, Boron is denoted by the letter of alphabet “B”, etc. Here these are the examples that use one letter but there are other elements that use more than 1 letter as the symbol. For example, the Chlorine is represented by the Cl.

The letters of the alphabet are used by chemists as symbols in chemistry.

The “ Symbol” is the correct answer because the chemist uses the letters of the alphabet to denote the element. For instance, the element sulfur is denoted by the letter of the alphabet “S”, the hydrogen is denoted by the letter of the alphabet “H”. Other elements that use more than 1 letter as the symbol. For example, Chlorine is represented by the Cl.

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Answer:

For numbers less than 1, the power of 10 in scientific notation has negative exponent and for numbers greater than 1, the power is either zero or has positive exponent. Explanation of Solution The given number is 2891, to write the scientific notation, decimal should be placed after first non-zero digit.

Explanation:

Answer:

1.4 x 10^-5 dm

Explanation:

Centimeters (cm) and decimeters (dm) are interconvertible S.I units of length.

- A centimeter is one-hundredth of a meter i.e. 100cm = 1m

- A decimeter is one-tenth of a metre i.e. 10dm = 1m

Based on this, a centimeter is one-tenth of a decimeter i.e. 1dm = 10cm

Hence, to convert 1.4 x 10^-4 cm to dm, we divide the value by 10

= 1.4 x 10^-4 ÷ 10

= 0.00014 ÷ 10

= 0.000014

Convert back to scientific notation by counting the decimal point forward to have: 1.4 x 10^-5

Hence, 1.4 x 10^-4 cm is equivalent to 1.4 x 10^-5 dm.

Element symbol V

Atomic Number 23

Mass Number 50.9415

The atomic number is the number of protons in the nucleus of an atom.

Vanadium is a chemical element with the symbol V and atomic number 23. Classified as a transition metal, Vanadium is a solid at room temperature.

Hence,

Element symbol V

Atomic Number 23

Mass Number 50.9415

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Explanation:

Hey there!!

The differences between them are:

Hope it helps....

Answer:

Moving Across a Period

Moving from left to right across a period, the atomic radius decreases. The nucleus of the atom gains protons moving from left to right, increasing the positive charge of the nucleus and increasing the attractive force of the nucleus upon the electrons

Answer:

atomic numbers

Explanation:

Atoms are the unit of molecules and compounds or matter. They have their atomic numbers and mass. Atoms of different elements must have different atomic numbers. Thus, option C is correct.

An atomic number is the total number of protons in a nucleus that is an essential factor in determining the place and position of the atom in the periodic chart.

Though the nucleus is made of neutrons and protons, the atomic number is only defined by the number of protons alone. Hence, the number of protons is equivalent to the atomic number.

The number of the protons and neutrons together makes the atomic mass of the element that is expressed at the lower of the symbol, whereas the atomic number is written at the upper of the symbol.

Therefore, the atomic number is different in each atom.

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Answer:

[tex]d=8.817\times 10^9\ mm[/tex]

Explanation:

It is given that,

Japan is 8817.6 km from California. We need to convert this distance in millimeters.

We know the conversion from km to mm is as follows :

1 km = 1000000

To convert mm km to mm use the unitary method as follows :

8817.6 km = 8817.6 × 1000000

[tex]d=8.817\times 10^9\ mm[/tex]

Hence, the distance between Japan and California [tex]8.817\times 10^9\ mm[/tex].

Answer:

any two

Explanation:

Gravitation force or gravitational attraction is a force of pulling or attraction that exist  between any two bodies that have a mass. Each and every body attract each other with the force of gravity due to their masses.

Every object in this universe having mass and distance attracts every other object.

Answer:

vznzbzvbajavavsytttuydr

Answer:

B. 6.35 x 10^4 g

Explanation:

Quantities such as mass have more than units that are interconvertible. Mass can be measured in kilograms (kg), grams (g), etc.

However, 1kg equals 1000grams

Hence, a measurement of 6.35 x 10^1 kg will be equivalent to grams (g) by multiplying by 1000units

That is, 6.35 × 10^1 × 1000

= 6.35 × 10^1 × 10^3

Multiplication in index means to add the powers

= 6.35 × 10^ (1+3)

= 6.35 × 10^4grams

Therefore, an equivalent measurement of 6.35×10^1 kg is 6.35×10^4 g.

Answer:

Solid:

shape: definite

volume:definite

closeness...: tightly packed

motion ..: vibrate in their position

liquid:

shape: indefinite

volume: definite

closeness: loosely packed

motion... : slide past each other

gas:

shape: indefinite

volume: indefinite

closeness: far apart

motion..: random movement

Explanation:

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Answer:

Milorganite 0636 Organic Nitrogen Fertilizer

Explanation:

According to  gardenhelpful.com they list a few grass proudcuts to make your grass more green.

Answer:

4 significant figures

Reason

The reason is count from 9 and all the decimal. it would be different if there was 0.09768.

Answer:

You would swim 200 time's.

Hope this help's :)

An Olympic swimming pool is 50 meters long. You swim from one end to the other four times, and the kilometers that you swim are 200 kilometers.

Meters are kilometers are measurement units used to measure length. They are used to write the value of the measurements. There are seven basic units of measurement. The values are liters, kg, meters, grams, milliliters, etc.

Meter is a SI unit, it is denoted by small m, kilometers is unit of length which is denoted by km. The SI unit is the internation unit system of measurement.

One meter is equals to 1000 kilometers. An Olympic swimming pool is 50 meters long. A person swims 4 time of 50 kilometers.

So, 50 x 4 = 200 km.

Thus, the kilometers that you swim are 200 kilometers.

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Answer:

Al ascender las burbujas van aumentando de tamaño.

Explanation:

Las burbujas que produce el buzo debajo del agua son pequeñas moléculas de dióxido de carbono gaseoso producto de la respiración del mismo.

Ahora, a medida que las burbujas suben a la superficie, la presión que sufren estas (Presión debido al agua), es menor conforme van ascendiendo debido a la ley de Boyle: A medida que la presión aumenta, el volumen va disminuyendo.

Esto significa que al ascender las burbujas van aumentando de tamaño debido a que la presión que sufren estas es menor que cuando están a mayores profundidades.

Answer:

The 49th Parallel and the 60th Parallel are the most significant.

Magnesium ( Mg+² ) has a full outer shell .

K and L shells of an atom are full , then it will have a total of 2 + 8 = 10 electrons in it . We know that magnesium has 12 electrons in it . Magnesium having 2 free electrons.

A litre is a unit of volume in the metric system. Hence, option B is correct.

Volume – How much space an object or substance takes up.

Measured in cubic meters (m3), litres (L) & millilitres (mL).

Volume is the measure of the 3-dimensional space occupied by matter, or enclosed by a surface, measured in cubic units.

The SI unit of volume is the cubic meter (m3), which is a derived unit.

Volume is the measure of the capacity that an object holds.

For example, if a cup can hold 100 ml of water up to the brim, its volume is said to be 100 ml.

Volume can also be defined as the amount of space occupied by a 3-dimensional object.

Hence, option B is correct.

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Answer :

[tex]Al(OH)_3(aq)+K_3PO_3(aq)\rightarrow AlPO_3(s)+3KOH(aq)[/tex]

[tex]Al^{3+}(aq)+3OH^{-}(aq)+3K^{+}(aq)+PO_3^{3-}(aq)\rightarrow AlPO_3(s)+2K^+(aq)+3OH^{-}(aq)[/tex]

[tex]Al^{3+}(aq)+PO_3^{3-}(aq)\rightarrow AlPO_3(s)[/tex]

Explanation :

In the net ionic equations, we are not include the spectator ions in the equations.

Spectator ions : The ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides.

The complete balanced equation will be,

[tex]Al(OH)_3(aq)+K_3PO_3(aq)\rightarrow AlPO_3(s)+3KOH(aq)[/tex]

The complete ionic equation in separated aqueous solution will be,

[tex]Al^{3+}(aq)+3OH^{-}(aq)+3K^{+}(aq)+PO_3^{3-}(aq)\rightarrow AlPO_3(s)+2K^+(aq)+3OH^{-}(aq)[/tex]

In this equation, [tex]K^+\text{ and }OH^-[/tex] are the spectator ions.

By removing the spectator ions from the balanced ionic equation, we get the net ionic equation.

The net ionic equation will be,

[tex]Al^{3+}(aq)+PO_3^{3-}(aq)\rightarrow AlPO_3(s)[/tex]

Answer:

mixture

Explanation:

Answer:

5. a. false b. true c. false d. true e. false

6. it has to be something that can be supported or refuted through carefully crafted experimentation or observation