Chemistry High School


Where is chemistry used?
A. In all areas of life
B. Only in the food industry
C. Mostly in medicine
D. Mostly in manufacturing

Answers

Answer 1

Answer:

A

Explanation:

chemistry is used in all areas of life

Answer 2

Answer: A

Explanation:

just got it right

Related Questions

why is it important for a measurement system to have an international standard ?

Answers

Answer:

Mark me brainliest

Explanation:

Standards help avoid confusion and ambiguity when taking measurements. For example, a meter will always be the same length, no matter who is taking the measurement or where it is being taken.

Completion of the human genome map

a) during the 1800’s

b) 1990-present

c) before the 1800s

d) 1900-1988

Answers

Answer:

I think it a or c yea a or c

You pour a spoonful of salt into a glass of water. Explain what happens to the mass of the salt and the mass of the water.

Answers

Answer:

If you pour a spoonful of salt into a glass of water, the sodium will react with the water and increase the mass.  

Explanation:

when 1337 G of solid dry ice sublimates into gas the mass of the resulting gas is​

Answers

Answer:

194.65 K

Explanation:

(−78.5 °C −109.3 °F)

Answer:

equal to the mass of the solid dry ice.

Explanation:

The mass of the gas is dependent on the mass of the solid dry ice.

the basic unit of matter is know as a(n)
a. atom
b.cell
c. element
d. compound

Answers

Answer:

a. atom

Explanation:

 google

The answer is a I am sure

An unknown element has two isotopes. The first isotope has a mass of 68.926 amu and an abundance of 60.108%. The second isotope has a mass of 70,925 amu and an abundance
of 39.892%. Calculate the average atomic mass AND identify the element.

Answers

Answer:

69.72344108

Gallium

Explanation:


M
r
(
G
a
)
=
69.7231
to 4 decimal places
.
Explanation:
To find the average atomic mass (
A
r
) of an element, given the percentage rarities of its isotopes, simply multiply each isotope's
A
r
by its percentage that is expressed as a decimal and total the results. We can carry this out in a single line of working:
M
r
(
Ga
)
=
(
68.9256
⋅
0.60108
)
+
(
70.9247
⋅
0.39892
)

M
r
(
Ga
)
=
69.7231
to 4 decimal places

Similarly, you could input the percentages normally and then divide by
100
:
M
r
(
Ga
)
=
(
68.9256
⋅
60.108
)
+
(
70.9247
⋅
39.892
)
100

M
r
(
Ga
)
=
69.7231
to 4 decimal places

Notice that the answers are the same. Also observe that the answer is closer to 69 than it is to 71, which makes sense since gallium-69 makes up a greater proportion of gallium in the universe (
~
60
%
) than gallium-71 does (
~
30
%
)

A divergent plate boundary is defined as two plates moving toward each other

True or false

Answers

Answer:

FALSE

Explanation:

Describe two substances that are useful because of their viscosity

Answers

Oil and Grease are examples of substances that are useful because of their viscosity.


Hope this help.

Which object will have the most kinetic energy?
O Small object moving slowly
O Small object moving quickly
O Large object moving quickly
O Large object moving slowly

Answers

Answer:

the large object moving quickly because the more the mas the more kenetic energy

Definition of periodic trends

Answers

Periodic trends are specific patterns in the properties of chemical elements that are revealed in the periodic table of elements. Major periodic trends include electronegativity, ionization energy, electron affinity, atomic radii, ionic radius, metallic character, and chemical reactivity.

The smallest particle of any particular type of matter is known by which of the following terms?

Group of answer choices

Compound

Chemical

Element

Atom

Answers

I think the correct answer is d

Elements that are good conductors, malleable, ductile, and shiny

ductility

malleability

metal

metalloid

nonmetal​

Answers

Metals are ductile,malleable,good conductors and shiny

How do you work out the charge of sulphate

Answers

Answer:

You would have find its valency

the final step of the scientific method is to ____ the results​

Answers

Answer:

The final step of the scientific method is to communicate the results​

what is the role of the sun in forming convection currents in earths water and air?use scientific reasoning to construct your answer.

Answers

Answer:

The heating of the Earth's surface and atmosphere by the sun drives convection within the atmosphere and ocean. This convection produces winds and ocean currents. The greater the pressure differences between a low-pressure area and a high-pressure area, the stronger the winds. I hope this helps

The sun heats the air near the equator of the earth, it becomes less dense and rises upward. As warm air rises, it cools and gets less dense than the air around it.

What is convection?

Convection can be d defined as the transfer of heat from one place to another due to the movement of heat or fluid. Convective heat transfer involves the processes of conduction as well as advection.

Gases and liquids can not be good conductors of heat under normal conditions, but they can easily transfer heat.

Convection occurs through diffusion or advection but does not take place in solids, as there is no movement of its constituent particles happens. The diffusion of heat in solids is known as thermal conduction.

The heat transfer that occurs between a surface and a liquid that is in contact with the surface is convection heat transfer.  

The Sun provides the energy for the convection in the ocean and produces ocean currents. There are two kinds of ocean currents: one is surface currents and the other deep currents.

Learn more about convection, here:

brainly.com/question/4138428

#SPJ2

before they react and form chemical compounds with other atoms ALL atoms are electrically neutral

A. True
B. False

Answers

Answer: true

Explanation:

Which substance is a heterogeneous mixture? WILL LIKE AND THANK WHOEVER IS CORRECT :)

Suspension
Solution
Compound
Colloid

Answers

suspension ;) i hope this helps!

Answer:

Suspension!

Explanation:

A suspension is a heterogeneous mixture in which the solute particles do not dissolve, but get suspended throughout the bulk of the solvent, left floating around freely in the medium. The other answers are homogeneous, not heterogenous.

Have a fantastic day!

What property of helium could be used to separate it from natural gas?

Answers

Answer: temperature liquefaction

Explanation: At the exact time the only used method or strategy the division of helium from natural gas is low temperature liquefaction

WILL MARK BRAINLIEST!!!! HELPPPP
what is the difference between simple distillation and fractional distillation

Answers

Answer:

Fractional distillation is essentially the same as simple distillationexcept that a fractionating column is placed between the boiling flask and the condenser. The fractionating column is usually filled with glass or plastic beads. These beads improve the separation between the liquids being distilled.

Explanation:

Answer:

Explanation:

The difference between simple and fractional distillation is the number of times that the liquid is vaporized and condensed. Simple distillation condenses the liquid once, so the boiling points of the two liquids must be far apart to make it efficient. The number of simple distillations in a fractional distillation apparatus depend on the length and efficiency of the fractionating column. The process is the same; the difference is mainly one of iteration.

brainliest pweaseeee

HELP ASAP BIG; POINTS I REALLY nEED THESE​

Answers

Answer:

76

120

Explanation:

the upper number is the sum of Protons and neutrons. and the lower one is the number of Protons! to find the number of neutrons, all you have to do is: upper number-lower number=number of neutrons

Energy and wavelength have a (n)___
relationship

Answers

I healthy relation ship yes

An ordered list of chemical substances is shown.

Chemical Substances
1 CuO
2 O2
3 CO2
4 NO2
5 Fe
6 H2O


Which substances in the list can be some of the reactants and products in the same combustion reaction? (4 points)
A. 1, 2, and 3
B. 2, 3, and 6
C. 1, 4, and 5
D. 1, 2, and 5

Answers

answer : the correct option is, (B) 2, 3 and 6.

Answer:

b

Explanation:

i took the test

the electron config for 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p3​

Answers

Answer:

I don't understand what you are asking

The group that has a single factor changed in an experiment is called:

Answers

Answer:

the experimental variable

Explanation:

Help, please!

Which property of a substance can be determined using a pH indicator ?

Density
Acidity
Electrical Conductivity
Thermal Conductivity
Boiling Point

Answers

The answer is acidity, because pH indicators help indicate the H+ or OH- concentration in a solution. H+ concentrations create acids, and OH- make bases. pH indicators don’t indicate any of the other answers in the question, so the answer is Acidity.

Which of the following is a covalently bonded molecule?
A) CI2
B) air
C) Ne
D) salt

Answers

Answer:

D:salt this is the correct answer

The answer is a. Covalent means they are sharing electrons and this is the case in Cl2.

What is the Mechanical advantage of a machine that only changes the direction of the force?

Answers

Answer: 1

Explanation:

The number of times a machine increases a force exerted on it The input force will be the same as the output force.


What is the total number of carbon atoms in 10C4H10?

Answers

Answer:

40 C atoms

Explanation:

Step 1: Write organic compound

10C₄H₁₀

We see here that in 1 mol of C₄H₁₀, we would have 4 atoms of C.

We are given that we have 10 moles of C₄H₁₀.

Therefore, we have 4 · 10 = 40 atoms C

Help please! Which of earth's layers is responsible for creating the earth's magnetic field?
A. inner core
B. outer core
C. mantle
D. crust

Answers

Answer:

inner core

Explanation:

Answer:

The outer core.

Explanation:

There is liquid metal, like iron, which creates electric currents going through the ground. When the Earth rotates on it's axis, it creates a magnetic field.

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Element Y has two naturally occurring isotopes. The most dominant isotope has a mass of 114.3789 amu and a percent abundance of 64.23%. What is
the mass of the second isoptope if the average atomic mass is 128.4359 amu? Remember that the two percentages will have to sum to 100%.
Answer to the correct number of sigtigs including units in your answer.
(to receive full credit, work must be submitted for this question)

Answers

Answer:

153.6771 amu

Explanation:

From the question given above, the following data were:

Isotope A:

Mass of A = 114.3789 amu

Abundance (A%) = 64.23%

Isotope B:

Mass of B =.?

Abundance (B%) = 100 – A%

Abundance (B%) = 100 – 64.23

Abundance (B%) = 35.77%

average atomic mass of Element Y = 128.4359 amu

The mass of the 2nd isotope (i.e isotope B) can be obtained as follow:

Average atomic mass = [(Mass of A × A%)/100] + [(Mass of B × B%)/100]

128.4359 = [(114.3789 × 64.23)/100] + [(Mass of B × 35.77) /100]

128.4359 = 73.4656 + (Mass of B × 0.3577)

Collect like terms

128.4359 – 73.4656 = Mass of B × 0.3577

54.9703 = Mass of B × 0.3577

Divide both side by 0.3577

Mass of B = 54.9703 / 0.3577

Mass of B = 153.6771 amu

Therefore, the mass of the 2nd isotope is 153.6771 amu

Other Questions
Use "To a Daughter with Artistic Talent" to answer questions 1-5. In which lines does the poet use personification to create a somber mood? Lines 3 through 5 Lines 9 and 10 Lines 17 through 19 Lines 28 and 29 Elements in the same group on the periodic table have the same number of valence electrons, but elements in the same period will increase the number of valence electrons by one from left to right on the periodic table. TRUE OR FALSE Rafael can type 24 words in 6 minutes. What is his rate in words per minute The bill at a restaurant came to $136.40.The customer decided to leave a 15% tip.What was the total bill including tip. A hiker walks 11 km due north from camp and then turns and walks 11 km due east. What is the angle of the displacement (on a straight line) of thehiker from the camp? heat cramps are cause by 1.heavy sweating 2.sun exsposure 3.discomfort 4.flavored water again, only 2 people may answer this c: An online poll has a question that appears on the screen, and you simply click buttons to vote "Yes, " "No, " "Not sure, " or "Don't care." On a particular day, the results of a question were tallied. In all, 636 said "Yes, " another 595 said "No, " and the remaining 93 indicated that they were not sure. What is the sample size for this poll? Compute the percent of responses in each of the possible response categories. (Round your answers to two decimal places.) Discuss the poll in terms of the population and sample framework that we have studied in this chapter. This random sample of responses collects the opinions of a random group of users across all users of the Internet. This voluntary response sample collects only the opinions of those that visit this site every day. 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An expression of the profoundest disgust gleamed for a moment in the young mans refined face. He was, by the way, exceptionally handsome, above the average in height, slim, well-built, with beautiful dark eyes and dark brown hair. Soon he sank into deep thought, or more accurately speaking into a complete blankness of mind; he walked along not observing what was about him and not caring to observe it. From time to time, he would mutter something, from the habit of talking to himself, to which he had just confessed. At these moments he would become conscious that his ideas were sometimes in a tangle and that he was very weak; for two days he had scarcely tasted food.The description of the setting, in the beginning, highlights a contrast between -A) the rundown part of town and the mans polished belongings B) the dirty streets and the mans clean attire C) the revolting streets and the mans attractive outward appearance D) the terrible smell and the mans indifference to his surroundings Read the sentences.Every morning, Jack has a plain bagel for breakfast. I keep suggesting that he put something on it, but he won't. I don't understand him. I always put cream cheese on my bagel.Select the possessive pronoun from the sentences.a heb himc Id my