are the answers correct ?

Answer:

3.01 × 10²³ atoms

Explanation:

Given data:

Mass of sample of silver = 53.93 g

Number of atoms of silver = ?

Solution:

Number of moles of silver:

Number of moles = mass/ molar mass

Number of moles = 53.93 g/ 107.86 g/mol

Number of moles = 0.5 mol

Number of atoms of silver:

1 mole = 6.022 × 10²³ atoms

0.5 mol × 6.022 × 10²³ atoms /1 mol

3.01 × 10²³ atoms

Answer:

light energy --> electric energy ----> light and heat energy by the bulb

Explanation:

The energy transfers that make the bulbs light, starting with energy from solar energy to electrical energy and from electrical energy to heat & light energy.

Transfer of energy is a process in which one form of energy will convert into other form of energy, and total energy during this conversion is conserved. When the solar energy comes from the Sun and falls on the solar panel, then PV cells that are present in the panel will absorb this solar energy and generate electrical charge. This electrical charges are responsible for the flow of internal electricity inside the cell.This generated electricity used by the bulbs to generate light energy as well as heat energy.

Hence, Solar energy will convert in to electrical energy which in turn converts into light and heat energy.

To know more about conservation of energy, visit the below link:

https://brainly.com/question/166559

Answer:

We can use a fan, divide the number of times that fan spins by the time it takes and the speed is obtained

Answer:

b

Explanation:

THE ANSWER B!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer:

Electroplating is the process that uses electric current to reduce dissolved metal ions by the use of electrolysis, to obtain the dissolved metal ions at the other electrode, mostly in the format of a uniform coating.

Answer:

gases

Explanation:

Their atoms are the least far apart

Answer:

no, because factors can not be divided

Explanation:

Answer:

1.12x10²³ atoms of F

Explanation:

A molecule is a group of 2 or 3 atoms that are bonded by electrostatic charges.

In 1 molecule of MgF2 there are 2 atoms of fluorine and 1 atom of magnesium.

Thus, there are 2 atoms of fluorine per molecule of MgF2. In 5.6x10²² molecules:

5.6x10²² molecules MgF2 * (2 atoms Fluorine / 1 molecule MgF2) =

Answer:

Percent yield = 88%

Explanation:

Given data:

Mass of C₇H₆O₃ = 200.0 g

Actual yield of aspirin = 231 g

Percent yield  = ?

Solution:

Chemical equation:

C₇H₆O₃  + C₄H₆O₃      →       C₉H₈O₄ + C₂H₄O₂

Number of  moles of aspirin:

Number of moles = mass/molar mass

Number of moles = 200.0 g/ 138.12 g/mol

Number of moles =  1.45 mol

Now we will compare the moles of aspirin with C₇H₆O₃.

                          C₇H₆O₃           :           C₉H₈O₄

                               1                 :               1

                            1.45              :             1.45

Theoretical yield of aspirin:

Mass = number of moles × molar mass

Mass = 1.45 g × 180.158 g/mol

Mass = 261.23 g

Percent yield:

Percent yield =( actual yield / theoretical yield )× 100

Percent yield =  (231 g/ 261.23 g)× 100

Percent yield = 0.88 × 100

Percent yield = 88%

Answer:

MnO2 M n O 2 is an ionic substance without any oxo-anions, therefore its name has the -ide ending.

Answer:

The electron dot diagram of helium has six fewer dots than the electron dot diagram of neon.

Explanation:

Answer:

Answer:

The electron dot diagram of helium has six fewer dots than the electron dot diagram of neon.

Explanation:

Explanation:

Answer:

33g

Explanation:

200 divided by 6=33.33

Answer:

Isotopes of an element have different physical properties.

Hope I can help you have a nice day.

Answer:

yes

Explanation:

were is it

Answer:

Electronic Geometry is Linear

Molecular Geometry is Linear

Polarity of HBr is indeed a polar molecule

Intermolecular Forces of HBr is a Dipole-Dipole Forces

Compound Name : Hydrogen Bromide

Explanation:

It is linear because it only has 2 atom that is obvious forming a linear species with bond angle of 180°

It is polar molecule because Br has higher electronegativity than hydrogen therefore produce a difference in electronegativity that proves HBr to be a polar molecule.

Intermolecular Forces is dipole-dipole because there is a dipole moment due to the difference in electronegativity with Br having the negative partial charge -δ and H having the positive partial charge +δ.

Answer:

hyrdrobormic acid

Explanation:

Answer:

Magnesium (Mg)

Explanation:

An element with a lower atomic mass than Calcium that has similar chemical property is the element Magnesium (Mg).

This because, elements in the same group or family on the periodic table has similar chemical properties.

Magnesium belongs to the same group as Calcium, other elements are:

     Be  Mg  Ca    Sr  Ba  Ra

The group is made of the alkaline earth metals. They have two valence electrons in their outer shell.

Answer: D

Explanation:

I don’t have an explanation. I got the answer wrong, I put “Circular electron paths”, when really it’s Electron Clouds.

Answer:D : Electron Clouds

Explanation:

is defined mathematically, describing a region with a high probability of containing electrons

Answer:

The answer is B.  A river is a body of water, therefore, there will always be some water running over the rock.

Answer:

The answer is: B

Explanation:

The reason for this is because when a rock is underwater (the river, in this case), the water runs across it non-stop until the rock is removed from the water. The only way it can be polished if it is submerged under the water for quite some time (years and years).

I hope this helped! :))

Answer:

the equation is balanced bro

Answer:

Magnesium (Mg) is 1, Nitrogen is 2, and Oxygen is 6

Explanation:

the reason Nitrogen is 2 and Oxygen is 6, is because the number after the parenthesis means you have multiple whatever is inside the parenthesis by that number.

Answer:

The nonpolar substance has a lower boiling point than the polar substance

Explanation:

What causes polarity is how the electrons of the molecules in each substance are being shared. To have a polar substance/molecule it means that the electrons are not equally shared and when there is non-polar molecule we have that the electrons are shared evenly.

For instance, let's say we have a chemical Compound AB. If AB is polar it means that the electrons here are not evenly distributed, thus we will have one of the molecules to be positive and the other to be negative, say A^- and B^- = A^-B^-. Hence, they have polar bonds.

The bonds in polar substance are stronger than the one in non polar substance thus we have lower boiling point in non-polar substance(the bonds are held together by weak forces) and a high boiling point in a polar substance.

Answer:

B.) The nonpolar substance has a lower boiling point than the polar substance

Explanation:

edge 2021

Answer:

you did not show the options

Explanation:

I am unsure if this is the correct question, but I think these are the answer choices that are part of this question:

O diamond

O sugar

O rubber

O salt (NaCl)

O wood

O ice

O flour

The answers to this question are diamond, sugar, salt (NaCl), and ice (1st, 2nd, 4th, and 6th options).

Answer:

2.7 x 10^-19 J

Explanation:

The formula needed for this problem is

E = hν

where E = energy, h = Planck's constant = 6.626x10^-34 and ν is the frequency

c = λν

where c = speed of light = 3x10^8, and λ = wavelength

3x10^8 = 7.35x10^-7 . ν

ν = 4.08 x 10^14 Hz

E = 6.626x10^-34 . 4.08x10^14 = 2.7 x 10^-19 J

Answer:

Explanation:

The volume of the gas at standard pressure can be found by using the formula for Boyle's law which is

[tex]P_1V_1 = P_2V_2[/tex]

Since we are finding the new volume

[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]

From the question we have

[tex]V_2 = \frac{635 \times 8}{1} \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

reqirured mediem

Explanation:

Answer:

reqirure a mediem

Explanation:

Answer:

Answer. There are 1.5×1024 molecules in 220 g CF4 .

Answer: D

Explanation:  Physical science is the study of the inorganic world. That is, it does not study living things. (Those are studied in biological, or life, science.) The four main branches of physical science are astronomy, physics, chemistry, and the Earth sciences, which include meteorology and geology.

Answer:

White dwarfs are hotter

Explanation:

Answer:

touch it :)

Explanation:

Answer: I Believe The answer to this question is to hover your hand over the piece of Metal, life what'd you do in a house fire to tell if the doorknob is hot.

Explanation:

Answer:

0.36 moles

Explanation:

Given data:

Number of moles of SO₃ form = ?

Number of moles of SO₂ react = 0.36 mol

Solution:

Chemical equation:

2SO₂ + O₂      →      2SO₃

Now we will compare the moles of SO₃ with SO₂.

                       SO₂           :           SO₃

                         2             :            2

                       0.36         :           0.36

Thus, from 0.36 moles of SO₂ 0.36 moles of SO₃ formed.