Chemistry High School

Which of the following is an example of chemical energy being used?

(A) Battery in a flashlight
(B) Ice melting
(C) Riding a bicycle
(D) Mercury rising in a thermometer

Answers

Answer 1

Answer:

(A) Battery in a flashlight

Explanation:

Because the chemicals in the battery are being converted to light and heat energy from the bulb!

Answer 2

Answer: D

Explanatione: I hope this helped :)

Related Questions

Facts about radiation in the human body

Answers

Answer:

How Radiation Affects Your Body. Radiation can damage the DNA in our cells. High doses of radiation can cause Acute Radiation Syndrome (ARS) or Cutaneous Radiation Injuries (CRI). High doses of radiation could also lead to cancer later in life.

Because radiation kills rapidly dividing cells (which is why we use it to treat fast-growing cancer cells), radiation exposure most increases the risk of cancers of rapidly dividing cells — leading to leukemia, lymphoma, breast cancer, bladder cancer, colon cancer, liver cancer, lung cancer, esophageal cancer, ovarian

Explanation:

Which of the following is a liquid someone help!!!!!

Answers

Juice cause it’s the only thing that will go down ur throat like it’s a slip in slide

THE ANSWER IS ON THE PICTURE HOPE IT HELPS

Using the periodic table, complete the ya me to describe each atom. Type in your answers.

Answers

Answer:

Explanation:

Using the periodic table, complete the table to describe each atom. Type in your answers. - 14514242.

The diagram shows the box for an element in the periodic table.
What is the atomic mass of the element shown?

A. 11

B. 23.0

C. 34.0

D. 12

Answers

A

Explanation:

sodium is a chemical element with the symbol and the atomic number is 11

Mg + 2HCl ---> MgCl2 + H2
How many grams of MgCl2 would result from a reaction involving 24.31 g of Mg?​

Answers

assumed that all of the initial Mg had reacted, therefore the total amount of Mg had transferred into Mg2+ in MgCl2

Molar mass for Mg is 24.31 g/mole and MgCl2 is 95.21 g/mole

--> nMgCl2= nMg = 24.31 g ÷ 24.31 g/mole = 1 mole

--> so the mass of MgCl2 = 1 mole × 95.21 g/mole = 95.21 g

Why do humans have a tailbone? What could it tell us about our past?

Answers

Answer:

Monkey have tail we come from monkey

Answer:

The coccyx, or tailbone, is the remnant of a lost tail. ... The coccyx serves as an attachment site for tendons, ligaments, and muscles.  Tailbones helped our ancestors with mobility and balance

Explanation:

Boron has two naturally-occurring isotopes. Boron-10 has an abundance of 19.8% and actual mass of 10.013 amu, and boron-11 has an abundance of 80.2% and actual mass of 11.009 amu. What is the average atomic mass for all isotopes of boron?

A 10.0 amu

B 10.5 amu

C 10.511 amu

D 10.812 amu

Answers

Answer:

D) 10.812

Explanation:

Given:

The two isotopes of boron (B).

Boron-10 has an abundance of 19.8% and Boron -11 has an abundance of 80.2%

To find:

The atomic mass of europium.

Solution:

Mass of Boron-10 = 10.013 amu

The percentage abundance of Boron-10 = 19.8%

The fractional abundance of Boron-10 =0.198

Mass of Boron-11 = 11.009 amu

The percentage abundance of Boron-11= 80.2%

The fractional abundance of Boron-11= 0.802

The average atomic mass of Boron = A.M

A.M = Mass of isotope x Fractional abundance of isotope

= 10.013amu x 0.198 +11.009amu x 0.802 = 10.81u

Therefore, D) 10.812 amu is the atomic mass of boron.

If a proton is added to the nucleus of germaium what out comes would acure

Answers

When a proton is added to the germanium nucleus, then its atomic number becomes 33, which is the atomic number of arsenic.

HOPE THIS HELPS YOU!!!!

Which of the following has electrons in a d orbital?
Mg
Si
Cr
Са

Answers

Cr.
Cr is the only element listed that is located in the d-block of the periodic table.

.
Which of the following describes Pluto?
1. asteroid
2. moon
3. planet
4. dwarf planet

Answers

Answer:

4. dwarf planet

Explanation:

The answer is a dwarf planet.


What is the wavelength of a radio wave that has a frequency of 9.40 X 10^8Hz?
3.1

Answers

671nm

Explanation:
Wavelength relates to frequency as follows:
λ
=
v
f

in which
f
is the frequency,
v
is the speed of light, and
λ
is the wavelength.
Filling this in for the example:
v
=
3
⋅
10
8
m
s

f
=
4.47
⋅
10
14
H
z
=
4.47
⋅
10
14
s
−
1

λ
=
3
⋅
10
8
m
s
4.47
⋅
10
14
s
−
1
=
6.71
⋅
10
−
7
m

from m to nm is
⋅
10
9

So the wavelength is:
671
n
m
(red light).

Write down the names, physical properties, and inertness of NOBLE GASES ( group no. 8)
Note:
*Please don't copy from anywhere
*50 POINTS!!!!!!!!

Answers

Answer:

There's No Answer Im Sorry

HELPPPPP
50 points
10. Fill in the blanks in the table below about an atom's subatomic particles.

Answers

A. electron, B. Nucleus

Proton is positive charge, electron is negative charge

proton weight, 1 AMU

Q4. What are the different ways in which human being use rocks ?​

Answers

Answer:

To hit someone on the head

Explanation:

self protection

I need help with this can you help me?

Answers

Answer:

This is the answer but I'm sure from all answers. I hope my answer help you.

Design a procedure to test whether the honey that your mother bought from the
supermarket is pure honey or not.

Answers

Answer:

i would test it and get real honey to see if the ingredients are the same

Explanation:

Explanation:

Water Test: In a glass of water, put a spoon of honey, if your honey is dissolving in water then it's impure. Pure honey has a thick texture that will settle at the bottom of a cup or a glass. –Vinegar Test: Mix a few drops of honey into vinegar water, if the mixture starts to foam, then your honey is impure.

why does a higher concentration make a reaction faster?

Answers

Answer:

Explanation: because more is always better

I need help pleaseee

Answers

the answer is d!!!!!!!

Someone pls help me I will make you brain

Answers

Answer:

the first one

Explanation:

hope this helps

(WORD BANK - Neap, gravitational, greatest, moon, high, Spring, low, Sun)
Ocean tides are caused by the ______________ pull of the _______ and the _______. The moon has the __________ effect on the tides. When the Sun, moon and earth are in a straight line, we
have __________ tides. When the Sun, moon and earth are at right angles we have _________
tides. Spring tides are especially _________ tides while neap tides are especially _________tides.

Answers

gravitational , moon , sun , greatest , spring , neap , high , low

Answer:

Ocean tides are caused by the gravitational pull of the moon and the sun. The moon has the greatest effect on the tides. When the Sun, moon, and earth are in a straight line, we have Neap tides. When the Sun, moon, and earth are at right angles we have spring tides. Spring tides are especially high tides while neap tides are especially low tides.

Explanation:

brainliest please. . . <3

Distinguish the endothermic and exothermic energy changes associated with ionic bond formation, and relate it to stability​

Answers

Answer:

When ionic compounds are formed, energy is released which is exothermic energy. If the energy released during bond formation is reabsorbed, the ionic bond holding the positive ions and negative ions together will break apart which is endothermic energy.

Explanation:

The formation of an ionic crystal lattice from its constituent ions is an exothermic process.

Endothermic changes are energy changes in which energy is absorbed while exothermic energy changes are those energy changes in which energy is evolved.

During the formation of an ionic bond, the metal looses electron(s). This is an endothermic process. The nonmetal accepts electrons. This is an exothermic process.

When the ionic crystal is formed, energy is given out because the energy of the lattice is less than the energy of the isolated ions. This heat change is exothermic.

Learn more: https://brainly.com/question/17011733

Which element is named after a scientist? ​

Answers

einsteinium is albert einstein

quotes for climate change

for example ‘’CLIMATE CHANGE IS REAL!’’
‘’SMALL CNAGES CAN MAKE A DIEFFENCE!’’

give me 3 and more

Answers

Answer:

Explanation:

WAKE FOR CLIMATE CHANGE IS NOT FAKE

SAVE THE GLACIERS

HELP THE ARCTIC ANIMALS

Where is a mid-ocean ridge exposed above sea level?

Question 11 options:

Himalaya Mountains


Mariana Trench


The Big Island of Hawaii


Iceland

Answers

Answer:

ice land should be it

Explanation:

Answer:

Iceland is the answer.

Explanation:

Can liquid methane change phases?

Answers

Answer: Methane is a gas at standard conditions.

Explanation: However, at low temperature and/or high pressures the gas becomes a liquid or a solid.

Answer: yes

Explanation:

How many moles of Oz would be required to generate 13.0 mol of NO2
in the reaction below assuming the reaction has only 74.1% yield?
2 NO (g) + O2 (g) → 2 NO2 (g)

Answers

Answer:32

Explanation:

Have a nice day :)

d. Period 3 element with 6 valence electrons

Answers

Answer:

Sulfur is an element is Period 3 with 6 valence electrons.

If the temperature of a liquid increases, how is the average kinetic energy of
the liquid affected?
o Increase
o Remains the same
o Decrease

Answers

The kinetic energy of the liquid affected increase

Methane (CH4) is a gas that is found in small quantities in Earth’s atmosphere. Which type of bonds does methane have, and why does one carbon atom bond with four hydrogen atoms? In three to five sentences, explain your answer in terms of valence electrons and electronegativity.

Answers

For example, in methane (CH 4​start subscript, 4, end subscript), carbon forms covalent bonds with four hydrogen atoms. Each bond corresponds to a pair of shared electrons (one from carbon and one from hydrogen), giving carbon the eight electrons it needs for a full outer shell.

In methane, the covalent bond is present between one carbon and four hydrogen atoms.

What is methane?

Methane is the simplest form of saturated hydrocarbons. Methane is an odorless gas as well as a colorless gas. It has one carbon and four hydrogen atoms which is why methane is also called a tetrahedral molecule.

CH₄ is the chemical formula of methane and is a non-toxic but flammable gas. From the tetrahedral structure of methane, we can see that a carbon atom is bonded to four hydrogen atoms.

One molecule of methane contains four covalent bonds. Each covalent bond is formed between the carbon and one hydrogen atom. The formation of a covalent bond between carbon and hydrogen is due to the small electronegativity difference between carbon and hydrogen.

In this way, carbon completes its octet and hydrogen completes its duplet. Therefore, the covalent bond is formed between one carbon atom bond with four hydrogen atoms in methane.

Learn more about methane, here:

https://brainly.com/question/2127750

#SPJ2

PLEASE HELP!!
What kind of metal is Co?
Alkali Metal
Transition Metal
Alkaline Earth Metal

Answers

Answer:

I believe Cobalt is a Transition Metal.

Answer:

answer is transition metal

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