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Which of these four elements is the most reactive metal?
2
He
10
Ne
18
Ar
36
Kr
54
Xe
85 86
Rn
6
B
Be
12
Mg
20
Ca
38
Sr
17
CI
35
Br
53
16
14
Si
15
P
Na
19
K
37
Rb
34
Se
52
Te
32 33
31
Ga
49
In
81 82
TI
113
Nh
Ge
50
Sn
As
51
Sb
83
B
115
Mc
55 56
84
Cs
87
Fr
Ba
88
Ra
Pb
114
FI
Po
At
116 117 118
Lv
Ts Og

Answer:Re3(PO4)2 I think I'm wrong

Explanation:

Answer:

In acetic acid, due to the +I effect of the alkyl group the electron density on the oxygen atom increases.

The release of H + ion becomes difficult. Thus , greater the magnitude of +I effect weaker will be the acid.

Order of +I effect : CH 3>H

Therefore , formic acid (HCOOH) is more acidic than acetic acid (CH 3COOH).

Answer:

Is there a picture if so I can't see it

Answer:

Third option.

Explanation:

when the balloon is rising to high altitudes, the air pressure decreases. so the helium in the balloon increases and expands the balloon.

hope this helps :)

Answer:

Sel palisade terdapat di daun dan fungsi utamanya adalah penyerapan cahaya sehingga fotosintesis dapat berlangsung.

Explanation:

Answer:

GROUP 2

Explanation:

u asked this already

i just dont understand...

Answer:

E =  0.024 ×10⁻¹⁷ J

Explanation:

Given data:

Wavelength of photon = 821 nm (821 ×10⁻⁹ m)

Energy of photon = ?

Solution:

Formula:

E = hc/λ

h = plancks constant = 6.626×10⁻³⁴ Js

c = speed of light = 3×10⁸ m/s

by putting values

E = 6.626×10⁻³⁴ Js × 3×10⁸ m/s / 821 ×10⁻⁹ m

E = 19.878×10⁻²⁶ J.m/ 821 ×10⁻⁹ m

E =  0.024 ×10⁻¹⁷ J

Answer:

wave speed

Explanation:

A wave is a disturbance that transmits energy from one place to another without the actual displacement of the particles of the medium.

To find the wave speed we need to determine the product of its frequency and wavelength.

  Wave speed  = Frequency x wavelength

Frequency of wave is the number of wave that passes through a point at a unit time.

Wavelength is the displacement of a complete wave train.

Answer:

false

Explanation:

because elements never exist in nature as single isotopes they are always combined

Answer:

FALSE

Explanation:

in the cases of three elements (tellurium, indium, and rhenium) the most abundant isotope found in nature is actually one (or two) extremely long-lived radioisotope(s) of the element, despite these elements having one or more stable isotopes.

Explanation:

A distilled water is the correct anwser

Answer:

Number of moles = 0.5 mol

3.011 ×10²³ atoms

Explanation:

Given data:

Mass of sulfur = 16 g

Number of moles = ?

Number of atoms = ?

Solution:

Number of moles of S:

Number of moles = mass/molar mass

Number of moles = 16 g/ 32 g/mol

Number of moles = 0.5 mol

Number of atoms:

1 mole contain 6.022×10²³ atoms

0.5 mol × 6.022×10²³ atoms / 1 mol

3.011 ×10²³ atoms

Answer:

Wire.

Explanation:

The wire has movable electrons, which moves the charge and the electricity around.

Battery provides the electricity by electrical potential energy, not transport it.

The switch toggles between an open circuit and a closed one, where only the closed one has a full loop of wire to transport electricity.

And the light bulb uses electricity.

Hope this helped!

Answer:

ans : C

..............

Answer:

its B

Explanation:

not so sure but its reasonable for me

Answer:

B

Explanation:

Hail form as water droplets freeze to form chunks or balls of ice

Please give me Brainliest as I provided an explanation

Answer:atomic mass, neutrons in the nucleus

Explanation: because I remember from when I took honors chemistry last year we learned about this and it’s called the atomic mass when looking at an atom and the neutrons in the nucleus are effected by it.

Answer:

My celebrity crush is young Keanu Reeves and my favorite drink is matcha tea

Explanation:

Answer: I don't really have a celeb crush but my favorite drink is Mango Slushie with boba.

Explanation:

Answer:

Final volume = V₂ =  8.2L

Explanation:

Given data:

Initial volume = 12.3 L

Initial pressure = 40.0 mmHg

Final volume = ?

Final pressure = 60.0 mmHg

Solution:

The given problem will be solved through the Boyle's law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume  

Now we will put the values in formula,

P₁V₁ = P₂V₂

40.0 mmHg × 12.3 L = 60.0 mmHg × V₂

V₂ = 40.0 mmHg × 12.3 L / 60.0 mmHg

V₂ =  492 mmHg. L /  60.0 mmHg

V₂ =  8.2L

Answer: 1.8 million years ago

Explanation:

Answer:In chemistry, a metal is an element that readily forms positive ions (cations) and has metallic bonds. Metals are sometimes described as a lattice of positive ions surrounded by a cloud of delocalized electrons. ... The traditional definition focuses on the bulk properties of metals.

Explanation:

Answer:

metal is a type of element to be percise M.O in the element periodic table

Explanation:

ur welcome

Answer:

The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles H2O2, or 34.01468 grams.

Explanation:

The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles H2O2, or 34.01468 grams.

Answer:7.00 moles of H2O2

Explanation:

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{2.4 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 3.986710...[/tex]

We have the final answer as

Hope this helps you

The number of moles of SO₃ contained in this chemical compound with the given number of elementary entities (2.4 × 10²⁴) is equal to: C. 4.0.

In Chemistry, the number of moles of SO₃ contained in this chemical compound with the given number of elementary entities, we would use the following formula:

n = N/NA

where:

Scientific data:

Substituting the given parameters into the formula, we have;

n = 2.4 × 10²⁴/6.02 × 10²³

n = 3.99 ≈ 4.0 moles.

Read more on number of moles here: brainly.com/question/3173452

#SPJ2

Answer:

Power

Explanation:

#platofam

Answer:

I'm gonna assume you're talking about plasma, since there's nothing known as plasama, and plasma is the closest thing you're probably gonna be intrigued about.

Plasma, physically, is what you might have heard of as the fourth state of matter. It is a state where all the atoms in a gas have been ionized, meaning there are roughly the same number of positive particles and negative particles in a bit of plasma. (Imagine it as a soup made out of protons and electrons. It's easier that way.) It's typically only formed in extreme heat or pressures, like in the core of the Sun, where there is immense pressure and heat.

Explanation:

Hope this helped!

wah re yash meri sis chin li reh tuneh (T-T)

kabhi nhi maf kar pauga tujhe yrr...☹

(T-T)