Another question please help!!! :)

Answer:

Using a lil common sense bcz I have no book sense on this...

Explanation:

Cobalt (Co) - 1

Germanium (Ge) - 4

Yttrium (Y) - 2

Neodymium (Nd) - 3

I Just looked at which comes before which in the periodic table and obv the one with less length from (1-4) is the lowest in the periodic table continuing... yah digg... lol

Answer:

J.J. Thomson

Explanation:

According to my book and wiki, Historically, the mass of the electron was determined directly from combining two measurements. The mass-to-charge ratio of the electron was first estimated by Arthur Schuster in 1890 by measuring the deflection of "cathode rays" due to a known magnetic field in a cathode ray tube. It was seven years later that J. J.

Please correct me if I'm wrong.

Answer:

Robert Millikan

Explanation:

Robert was the true answer

Answer:

Buoyant Force

Explanation:

"Buoyancy or upthrust, is an upward force exerted by a fluid that opposes the weight of a partially or fully immersed object." - Google

The photoelectric effect is an electron coming out of a metal because of electromagnetic radiation  

One type of electromagnetic radiation is light  

Frequency (f): the number of waves / second

Can be formulated :

[tex]\tt v=\lambda\times f[/tex]

v=fast wave propagation ⇒ speed of light =3.10⁸ m/s

λ= Wavelength

The energy can be formulated as

 E = h x f

Where

E = energy of light, J

h = Planck's constant (6,626.10⁻³⁴ Js)

f = Frequency of electromagnetic waves, Hz

1. λ = 4.82 x 10⁻¹⁰ m

the frequency =:

[tex]\tt f=\dfrac{v}{\lambda}=\dfrac{3.10^8}{4.82\times 10^{-10}}=6.22\times 10^{17}[/tex]

2. The energy

[tex]\tt E=6,626.10^{-34}\times 6.22\times 10^{17}=4.12\times 10^{-16}~J[/tex]

3. λ = 4.32 x 10⁻⁷ m

[tex]\tt f=\dfrac{3.10^8}{4.32\times 10^{-7}}=6.94\times 10^{14}\\\\E=6.626\times 10^{-34}\times 6.94\times 10^{14}=4.598\times 10^{-19}~J[/tex]

Answer:

hinndndnnddnndndndnd do djfj

Explanation:

hdhdjdbdndndndjjddjdndjdjdndnndndndnd be rnnrbr

Solubility and molecular polarity

Answer:

0.98

Explanation:

The object will float on the salt water.

We have an object of density 1.12 g/cm³.

We have to determine whether it will sink or float in salt water of given density.

In 1 cm³ there are 1 ml

According to the question -

Density of object = ρ(O) = 1.12 g/cm³.

Density of salt water = ρ(S) = 1.35 g/ml = 1.35 g/cm³.

For the object to sink its density should be greater than that of the salt water. Mathematically -

ρ(O) > ρ(S) → Object will sink.

ρ(O) < ρ(S) → Object will float.

Now, it can be seen that -

ρ(O = 1.12) < ρ(S = 1.35)

Therefore, the object will float on the salt water.

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The thing that affects the rate at which acid rain reacts with a statue is the concentration of sulfur dioxide and carbon dioxide in the environment.

Acid rain may be defined as a type of precipitation on the surface of the earth that involves a significant amount of acids like nitric acid, sulphuric acid, and carbonic acid due to the heavy concentration of nitrous oxide, carbon dioxide, and sulfur dioxide in the environment.

This high concentration of acids in acid rain generally reacts with metals and corrodes them. They permanently lose the actual shine of marble, statues, buildings, etc.

The concentration of these acids typically affects the rate at which acid rain reacts with a statue. If there is a high concentration, it highly influenced the property of statues.

Therefore, the thing that affects the rate at which acid rain reacts with a statue is the concentration of sulfur dioxide and carbon dioxide in the environment.

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Answer:

3

Explanation:

The zeros after 152 are not significant.

Water

Water is a compound because it is made from more than one kind of element (oxygen and hydrogen).

answer: (c) butane is distilled from crude oil

Explanation:

this is the answer because a chemical change is when the formula or what’s inside of it changes ( not what it looks like) so when the butane is token out of the crude oil it changes the formula

Answer:

coffee can be burnt

Explanation:

coffee can be burned when brewing. When an empty pot sits on the heating element in a restaurant coffee machine it can get very hot. When the first stream of a new brew cycle hits the bottom of the pot, boils off very quickly, producing a horrible smell and taste that infuses the entire pot.

C would be my best guess because of ultraviolet radiation

Hope this helps! Good luck :)

Answer:

i feel like it's false. i'm not quite sure right now, but i have a feeling that it's false. i hope i'm right.

Explanation:

Answer:

I'm sorry what this question needs more context.

Explanation:

Answer:what are the foods?

Explanation:

in form of solid form honey possess

Answer:

Honey

Explanation:

Honey is an ancient remedy for the treatment of infected wounds, which has ... The antimicrobial properties of honey have been known to humans for ...

Abstract

Introduction

Composition

Honey production and ...

Physical properties of honey

Honey as food

Microbes in honey

Answer:

if we take away the web, we can slide down

Explanation:

Answer: Here you go.

Explanation:

The atoms in molecules are joined by covalent bonds. Air is a mixture that contains the elements nitrogen, oxygen and argon, and also the compound carbon .

Hope this helps!

Answer:

please mark brainliest!

Explanation:

The element Nickel (Ni) is one of the few ferromagnetic metals. Ferromagnetic means they are attracted to magnets and can be magnetized themselves. Most metals aren't magnetic with the exception of iron, nickel, cobalt, gadolinium, neodymium and samarium.

Answer: ummmmmm

Explanation:

Answer:

The answer is C. Kinetic Energy is converted to electrical energy

Explanation:

Just took the test

Electric energy is converted to kinetic energy is the mistake that Jaden made in this scenario.

This is defined as the capacity and ability to do work and examples include kinetic, electrical etc.

The kinetic energy through the movement of water by the wind is what powers the turbine to become an electric energy and not electrical energy being converted to kinetic energy.

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Answer:

its 1 and 2

Explanation:

because the 3rd one is alrdy in the ground

Answer:

solution of K3PO4?

1.31 m

2.

Concentration of Chloride Ions in a 0.193m solution of Potassium Chloride is _______.

0.193 m

3.

Concentration of Iodide ions in a 0.193 solution of Barium iodide is _________.

0.386 m

4.

In a Titration of 35.00 mL of 0.737 m H2So4, _______ mL of a 0.827 m KOH solution is required for neautralization.

62.4

5.

Consider the following reactions

AgNo3 ------>

Co(No3) ---->

AgNo3 ---->

Which is the correct order of increasing activity for these metals?

Ag < Co < Zn

6.

There are ______ Mol of bromide ions in 0.500 L of a 0.300M solution of AlBr3

0.450 m

7.

How many grams of Sodium Chloride are there in 550 mL of a 1.90 m aq solution of sodium CL?

6.11 g

8.

The total concentration of ions in a 0.250 M solution of HCL is _______?

0.500 m

9.

How many moles of Co 2+ are present in 0.200 L of a 0.400 M solution of Co I2

0.0800

10.

A Neautralization reaction between an acid and a metal hydroxide produces

Water and a salt

11.

7 Strong Acids

Claire HCl

Brian HBr

invented HI

nutrious HNo3

(3)candy HClO3

(2,4)sold H2So4

(4)profit HClO4

12.

8 strong bases

Lily LiOH Lithium Hydroxide

never NaOH Sodium Hydroxide

knew KOH PossasiumHydroxide

Robert RbOH

could ClOH

bake Ba(OH)2

strawberry Sr(OH)2

cake Ca(OH)2

13.

What are the spectators ions in the reaction between KOH(aq) and HNO(aq)

HF + OH ---> H2O + F-

14.

Combining Aq solution of BaI2 and Na2So4 affords a precipitate of BaSO4

Which Ions is/are spectator ions in the reaction?

Na + and I -

15.

The Spectator ions in the react between aq Hydrochloric acid and Aq Ammonia

Are ________

B. Cl - only

16.

Spectator ions of aq hydrofluoric acid and aq barium hydroxide are _________

D. Ba 2+ only

17.

Spectator ions in reactions

Aq perchloric acid and Aq barium hydroxide are >>>>>>>

ClO 4- and Ba 2+

To solve this we must be knowing each and every concept related to concentration and its calculation.  Therefore,  the concentration that of chloride ions in a 0.193 m solution of potassium chloride is 0.193 m.

There are two components in an aqueous solution: the solute and the solvent. You must be familiar with these two fundamental terminology for solution concentration. The quantity of solute present in the solution must always be recorded.

A solution's concentration can be expressed in a variety of ways. Chemists frequently work with moles when doing their tasks. In place of the number of moles, pharmacists will utilize percentage concentrations. 

KCl[tex]\rightarrow[/tex] K⁺ + Cl⁻

concentration of KCl= concentration of K⁺= concentration of  Cl⁻ = 0.193 m

Therefore,  the concentration that of chloride ions in a 0.193 m solution of potassium chloride is 0.193 m.

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Answer:

No

Explanation:

Answer:

The main features of plate tectonics are:

Convection currents beneath the plates move the crustal plates in different directions. The source of heat driving the convection currents is radioactivity deep in the Earths mantle.

The important features of earth's plates are seismicity,volcanicity  and tectonic activity along plate margins.

It is a generally accepted scientific theory which takes into consideration earth's crust to be made up of tectonic plates. These plates move slowly and are moving since 3.4 billion years ago.

The model is developed on the concept of continental drift .Earth's lithosphere is split up in to seven-eight major plates and many minor plates.The position where plates meet their relative motion determines the plate boundary.

Tectonic plates are made up of lithosphere of ocean and thicker continental lithosphere.These plates are able to move because lithosphere has high mechanical strength.Lateral density variations occurring in mantle cause convection.

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Answer:

Find the limiting reactant.

Explanation:

Using the ratio in the chemical formula, find the limiting reactant.

[tex]0.164mol Mn*\frac{2molMnO3}{2molMn} = 0.164molMnO3[/tex]

[tex]0.232molO2*\frac{2molMnO3}{3molO2} = 1.55molMnO3[/tex]

The second equation results in less mol of MnO₃, therefore it is the limiting reactant and changing the moles of O₂ to moles of MnO₃ which will give the theoretical yield which is 1.55 mol MnO₃.

Answer:

B. The average atomic mass.

APEX

Answer:

The average atomic mass.

Explanation: