Chemistry High School

what is the name of this atom?
A.) Beryllium
B.) Boron
C.) Fluorine
D.) Helium

What Is The Name Of This Atom?A.) BerylliumB.) BoronC.) FluorineD.) Helium

Answers

Answer 1

Answer:

Explanation:

A .

Related Questions

When 0.25 moles of NH3 are produced according to the reaction below, how many moles of H2 must have reacted?
N2 + 3 H2 --> 2 NH3
O 1.5 moles H2
O 0.38 moles H2
O 0.25 moles H2
O 0.17 moles H2

Answers

Answer:

Explanation:

by stoichiometry

nNH3/2=nH2/3

0.25/2=nH2/3

nH2=0.25×3/2

nH2=0.375 mol

so its 0.38 mol

Answer:

I have this quiz rn I will try 0.38 if it is right I’ll edit this and say that

Explanation:

Which chemical equation best represents the process of photosynthesis?

Answers

Answer:

6CO2 + 6H20 ----> C6H12O6 + 6O2

Explanation:

(Carbon Dioxide) + (Water) ------> (Glucose) + (Oxygen)

Answer:

A

Explanation:

CO2= carbon dioxide

H2O= water

C6H12O6=glucose

O2=oxygen

What transition energy corresponds to an absorption line at 527 nm?​

Answers

Answer:

E = 3.77×10⁻¹⁹ J

Explanation:

Given data:

Wavelength of absorption line = 527 nm (527×10⁻⁹m)

Energy of absorption line = ?

Solution:

Formula:

E = hc/λ

h = planck's constant = 6.63×10⁻³⁴ Js

c = speed of wave = 3×10⁸ m/s

by putting values,

E = 6.63×10⁻³⁴ Js ×  3×10⁸ m/s / 527×10⁻⁹m

E = 19.89×10⁻²⁶ Jm /527×10⁻⁹m

E = 0.0377×10⁻¹⁷ J

E = 3.77×10⁻¹⁹ J

Answer:

D

Explanation:

a p e x

Which of the following is a physical change?
Sugar dissolving in water

Milk souring

Metal rusting

Paper burning in a fire

Answers

Answer:

sugar dissolving in water

Explanation:

at the end mixing 2 substances and not get a new substance is not a chemical change. the sugar is still sugar even when its in water.

someone help me please i’ll give brainly

Answers

Answer:

it is endothermic change ..........

Answer:

Endothermic change

Explanation:

Khan Academy:

"The reactants are at a lower energy level compared to the products—as shown in the energy diagram. Since we are forcing the reaction in the forward direction towards more unstable entities, overall ΔH for the reaction is positive, i.e., energy is absorbed from the surroundings."

- The answer is from a khan academy lesson.

Brainliest appreciated! Hope I helped!

What are the coefficients that will balance the skeleton equation below?

___GaF3 +___KCN rightwards arrow___Ga(CN)3 + ___KF





A.
1, 3, 1, 3

B.
3, 1, 3, 1

C.
1, 1, 1, 3

D.
1, 3, 3, 1

1 points

QUESTION 6

The previous question is an example of what type of chemical equation?

A.
Synthesis

B.
Decomposition

C.
Single Re-Placement

D.
Double Re-Placement

Answers

1, 3, 1, 3

Explanation:

Ga - one on both sides

F - three on both sides

CN - three on both sides

K - three on both sides

But remember that CN was being multiplied by 3 on the right side already, meaning GA(CN)3 didn't mean a coefficient.

Answer:

Double re-placement

The two metals switched dance partners, that means it's a double.

Click the picture please

Answers

Answer:

A chemical change can be indicated by a change in color, change in temperature (exothermic or endothermic), change in smell, formation of a precipitate, or the formation of gas bubbles.

Explanation:

this should work

Momentum is mass times

A. acceleration
B. velocity
C. distance

Answers

B. velocity

This is the answer

How are groundwater and surface water related?

Answers

Answer:

Surface water and groundwater systems are connected in most landscapes. ... It is the groundwater contribution that keeps streams flowing between precipitation events or after snowmelt. For a stream to gain water, the elevation of the water table in the vicinity of the stream must be higher than the streamwater surface.

Explanation:

As a car slows down, its kinetic energy increases.
True
False

Answers

Answer:

False.

Explanation:

Kinetic energy represents the energy the car has and is using right now. So, if the car was fast, then it would have a lot of kinetic energy. A slow car has a low amount of kinetic energy.

Students A and B mix two solutions together during a lab investigation. Both students observe a temperature change and a production of gas being emitted. Student A concludes that there has been a chemical change. Student B concludes that there has not been a chemical change, but rather a physical change. Which student's conclusion is valid, based on the information provided?

Answers

Answer:whjwjehd

Explanation:

I have a question, about trends in the periodic table. Mostly focusing on ionization energy. From going from right to left it increases as the atom's size decreases. Can someone explain why this happens? Like why does it increase as the size decreases Thank you.

Answers

It increases because the electrons are held tighter together by the higher effective nuclear charge. The electrons are held in lower energy orbitals and closer to the nucleus and more tightly bound and harder to remove from the atom.

Please help!!!
This equation is balanced: Al+N2–2AIN
True
False

Answers

Answer:

true

Explanation:

There are a ton of things that you can find on the interenet

Answer:

False

Explanation:

How many protons does a nitrogen atom have?
07
0 14
8
05

Answers

Answer:

07.

Explanation:

Answer:

7

Explanation:

We call these different isotopes of nitrogen. There are always 7 protons because the nucleus is always a nitrogen nucleus (Z=7). Since different isotopes of an element have different numbers of neutrons (but always the same number of protons) they have different mass numbers.

describe a habitat of giraffe or an elephant(i prefer the giraffe tho, and please make it reasonable)

Answers

Answer:  Savanna, Woodland, or Grassland.

Giraffes eat new shoots and leaves, their habitat needs to have a good supply of trees -- they flock towards acacia trees in particular. Giraffes use their extremely long legs, necks and tongues to browse mainly from the thorns on the acacia tree. The tongue and the inside of the mouth are lined with tough tissue that protects against the thorns.

What separation method collects vapor

Answers

Answer:

evaporation and distilation

Explanation:

Distillation. In distillation, components of a liquid mixture are separated on the basis of the differences in their boiling temperatures. In its simplest form, distillation involves boiling the mixture and collecting the vapor in a condensation vessel, where it turns back into a liquid.

Given the balanced equation representing a reaction:

4Al(s) + 3O2(g) → 2Al2O3(s)

Which type of chemical reaction is represented by this equation?

Answers

Answer:

The equation is already balanced.

The type of chemical reaction is oxidation

Explanation:

Oxidation is the addition of oxygen to a substance

Answer:

This type of reaction is a synthesis reaction

Explanation:

Volume in liters of carbon dioxide produced at stp when 0.85 grams of butane reacts

Answers

Volume in liters of Carbon dioxide : 0.672

Further explanation

Reaction(combustion of butane-C₄H₁₀)

2C₄H₁₀+13O₂⇒8CO₂+10H₂O

mol butane (MW=58,12 g/mol) :

[tex]\tt \dfrac{0.85}{58,12}=0.015[/tex]

mol CO₂ : mol C₄H₁₀ = 8 : 4, so mol CO₂ :

[tex]\tt \dfrac{8}{4}\times 0.015=0.03[/tex]

At STP, 1 mol = 22.4 L, so volume CO₂ :

[tex]\tt 0.03\times 22.4~L=0.672~L[/tex]

Luna finds a plant in the forest and is curious about the type of plant she is viewing. She notices the plant has a woody stem and is about a foot taller than she is. Based on this description alone, what is most likely true about this species?

Answers

Answer:

vascular

Explanation:

cuz i know

Answer:

vascular :D

Explanation:

What is the mass 5.00 x 1022 molecules of PbCI2

Answers

Answer:

ion know this one

Explanation:

Mendel's early studies led scientist to discover what in 1953?

RNA
DNA
GMO

Answers

Answer:

DNA

Explanation:

DNA

Mendel's early studies led scientist to discover what in 1953 is DNA

Answer:

DNA

Explanation:

luv you <3

someone help me please i’ll give brainly

Answers

Answer:

D) All of the above

Explanation:

When the temperature of an object increases, the average kinetic energy and speed of its particles increases. When the average kinetic energy of its particles increases, the object's thermal energy increases. Therefore, the thermal energy of an object also increases as its temperature increases.

which of the following explains why salt water is considered a mixture​

Answers

Answer:

sal5 water = kaka

Explanation:

because i need points ty man

what is inert pair effect​

Answers

Answer:

The inert pair effect is the tendency of the two electrons in the outermost atomic s-orbital to remain unshared in compounds of post-transition metals. The term inert pair effect is often used in relation to the increasing stability of oxidation states that are two less than the group valency for the heavier elements of groups 13, 14, 15 and 16. .[1] The name suggests that the outermost s electrons are more tightly bound to the nucleus in these atoms, and therefore more difficult to ionize or share

What charges would an atom of Cesium and Radium form based on the octet rule

Answers

Answer:

1+

Explanation:

Hope this helped!

A proton has a charge that is opposite the charge of

Answers

an electron

proton=positive charge
electron=negative charge

which process explains how rock that formed underground is now aboveground in sierra nevada

Answers

Answer:

formation process

Explanation:

farllon plate was fully subducted along pacific coast line

The cascade mountains formed from the igneous rocks by plate movement are younger and they are formed by the uplift of plates makes them appears aboveground in sierra Nevada.

What are cascade mountains in Sierra Nevada ?

Since they were formed by melting above a subduction zone, the Cascades and Sierra Nevada's rocks are largely igneous. The Cascades, which initially arose 36 million years ago and are still forming now, are younger mountains.

In contrast, the Nevadan Orogeny, which occurred over 200 million years ago, is when the plutonic core of the Sierra Nevada started to form. When subducting at a sharp angle, oceanic lithosphere at the edge of the North American continent melted, and the magma surged back through the continental crust to form a volcanic arc.

The once-deep granite batholith that makes up today's Sierra Nevada was exposed by erosion after being raised by the North American plate. Although one small spur is located in Nevada, the elevated granitic intrusion is 640 kilometers  long and largely located in California.

Find more on rocks in Sierra Nevada:

https://brainly.com/question/21856412

#SPJ3

DESCRIBE TROPICAL STORM; THUNDERSTORM; AND TORNADOES

PLEASE HELP ME THIS IS DUE AT 1:45 PM AND IT'S 1:22 OM PLEASEEEE helppp!!1

Answers

Answer:

a tropical strom is when theres a lot of rain and it almost developed into a hurricane and a thunderstorm is rain with lightning and thunder but not that bad like a tropical storm and a tornado is when there is a huge gust of win that is formed in a circle like shape and could cause damage to homes

Explanation:

What are the common characteristics among acidic compounds? Basic?

Answers

Answer:

turns blue litmus red

reacts with metal

increase hydrogen concentration

What happens to the atoms of most non-metals when they react with other elements like metals?

Answers

Explanation:

Atoms of non-metal usually gain electrons when

they react with other elements.

Eg -

Na· + ·Cl → Na⁺Cl⁻

Therefore,

Option A is correct ✔

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