Chemistry Middle School

What mass of NaOH must be added to the solution to increase the concentration to 30.00% by mass?

Answers

Answer 1

Answer:1) 0.0625 g.

2) 0.0125 g.

3) 80.0 g If this right please try to help me!

Answer 2

Answer:0.0125

Explanation:on edge

Related Questions

Which of the following best explains the relationship between peak-to-peak amplitude and semi-amplitude?

Answers

Answer:

A. Semi-amplitude is half the distance of the peak-to-peak amplitude

Explanation:

The correct answer is : The semi-amplitude is half the distance of the peak-to-peak amplitude (option A). The peak-to-peak amplitude is the total distance between the highest positive peak and the lowest negative peak in a waveform. It represents the full range of variation in the amplitude of the waveform.

The peak-to-peak amplitude of a waveform is the measurement of the total distance between the highest positive peak and the lowest negative peak. It provides information about the full range of variations in the amplitude of the waveform. Mathematically, it is calculated by subtracting the minimum value from the maximum value of the waveform.

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I need help asap pleasee

Answers

The answer is C, it can change with new evidence.

The answer is C hope this helps you out

Water off the coasts of some continents is typically colder than water further offshore because…
A. What evidence have you discovered to explain why air flows?
B. What evidence have you discovered to explain why Earth has global wind systems?
C. What evidence have you discovered to explain why ocean waters flow?
D. What evidence have you discovered to explain how wind influences the movement of water?
And for the Summary.
Water off the coasts of some continents is typically colder than water further offshore because...

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B the anwser is the one question is that it

NEED ASAP!!!!
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SELECT ALL THE CORRECT ANSWERS.
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MULTIPLE CHOICE QUESTION!!!
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The graph gives information on greenhouse gas (GHG) emissions from industries. Which questions would help clarify the evidence from this graph?

A. What caused a drop in GHG emissions around 2009?

B. Did GHG get emissions cause the melting of arctic glaciers?

C. How much methane was emitted by homes between 1990 and 2000?

D. Does industrial equipment release gases other than greenhouse gases?

E. Which types of industries were included in the study?

Answers

Answer:

D. Does industrial equipment release gases other than greenhouse gases?

E. Which types of industries were included in the study?

Explanation:

Which two compounds are used in batteries? sulfuric acid and potassium hydroxide, lithium hydroxide and nitric acid, potassium hydroxide and nitric acid ,sulfuric acid and ammonium hydroxide.

Answers

Answer:

sulfuric acid and potassium hydroxide is actually the answer, not the girls above me.

Explanation:

EDU SAID SO

The two compounds are used in batteries are sulfuric acid and potassium hydroxide.

What electrolytic compounds present in a batteries?

The chemicals present in a different type of batteries are sodium chloride, sulfuric acid, hydrochloric acid, chloric acid, potassium nitrate, nitric acid, sodium hydroxide, magnesium hydroxide and sodium acetate.

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Use your answers from questions 1 and 2 as the basis for the first section of your lab report. This section provides your reader with background information about why you conducted this lab and how it was completed. It should be one to two paragraphs in length.
IT IS ABOUT CELLS

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Answer:

sorry man the kind of question where you have to write them, you gotta do that youself becuase the teachers can find that you got the asnwer here, use brainly for questions with choices not the writing ones

Explanation:

What type of person studies and collects data on the weather?

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The answer would be a Meteorologist

Meteorologist is a person who studies and collects data

What does it mean when a material can reflect light?

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Answer:

Reflection is when light bounces off an object. If the surface is smooth and shiny, like glass, water or polished metal, the light will reflect at the same angle as it hit the surface. This is called specular reflection. Light reflects from a smooth surface at the same angle as it hits the

Explanation:

pls follow me if this truely helped u

Reflection is when light bounces off an object.if the surface is smooth and shiny ,like glass water or polished metal the light reflect at the same surface at the same angel it hits the surface

Match each letter with the correct label. Use the atom diagram below.

Electron - Nucleus - Proton - Neutron

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D= nucleus
C= protons
B= neutron
A= electron

Answer:

Explanation: First and foremost, we must carefully examine the provided diagram in order to properly name the sections of an atom diagram.

Step-by-step instructions are given along with the answers in sequential sequence.

Correct answer for (A) is Electron since they are present at the outermost shell of an atom.The correct answer for (B) is Neutron since it is the central element of an atom.The proton is the right answer for (C), as it is included in the nucleus grouping with the neutron.The nucleus is the correct option for (D) since it is the primary component of the atom and includes both protons and neutrons.

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What things should be done before demolition begins to keep workers, other people, and other properties safe if a building fell down?

Answers

Answer:

Occupational Safety and Health

Explanation:

For example there should be quick exits in an emergency which includes occupational safety. Plus, there should be medical supplies which explains the need of safety

What description explains how pollen is received?

Question 14 options:

The ovule at the top of the pistil receives pollen.
Also im banned for a day

The stigma at the top of the pistil receives pollen.

The pistil at the top of the stamen receives pollen.

The stamen at the top of the pistil receives pollen.

Answers

Pretty Sure It’s Option B.

The answer is B

The head of the pistil. The stigma receives pollen, which will begin the process of fertilization.

A dog is exposed to radiation and it caused damage to a cell’s DNA. This genetic change results in the controls on mitosis not working. Which one of the following is most likely to occur after this damage?
Responses

An infection in the blood spreads results in sepsis ,

A blood clot stops oxygen to the heart, causing a heart attack,

Cells produce new versions of a virus to allow it to spread throughout the body

The cell dividing rapidly and creating a cancerous tumor

Answers

I suppose the last option to be correct.

Answer:

The cell dividing rapidly and creating a cancerous tumor

Explanation:

Which →two← factors decrease as the kinetic energy of the particles in an object decreases?

a

The object's weight.

b

The object's temperature.

c

The speed of the particles.

d

The size of the particles.

Answers

Answer:

a and c

Explanation:

I'm only sure on a but c is the second best so Yea don't completely trust it

The answer is A and C. I hoped this helped have a great day. :)

What makes it possible for light from the sun to cause changes to genetic material?

Answers

Answer:

But some light from the sun, like ultraviolet (UV) rays, are not good for us, or specifically, the DNA in our cells. UV rays can cause mutations, or errors, in that genetic material. When mutations are introduced into our genetic code, it can cause serious health problems, like skin cancer

Explanation:

Use the picture below to answer the question.
Comparing the two waves, wave B has a...

A) higher frequency.
B) greater amplitude.
C) shorter wavelength.
D) longer wavelength.

Answers

Answer: D) longer wavelength.

Explanation:

A) higher frequency and C) a shorter wavelength.

As far as I know, you calculate frequency on a graph using the number of peaks you can see. Since the wavelength is shorter (the distance between two peaks on the wave), the frequency should also be higher as more fit on the graph.

I just need help all I need is the answer please some one

Answers

Answer: The correct fill-in-the-blank answers are:

1. through binary fission (already filled in)

2. be resistant to penicillin

3. through asexual reproduction.

4. cell replicates before

5. a simpler process

Explanation:

The correct fill-in-the-blank answers are:

1. Bacteria reproduce through binary fission (already filled in)

2. A parent bacterial cell is able to survive in the presence of antibiotic penicillin. Subsequent generations from this parent will be resistant to penicillin

3. Something that potatoes and bacteria have in common is that they both reproduce through asexual reproduction.

4. In asexual reproduction DNA from the parent cell replicates before it produces daughter cells.

5. Asexual reproduction is a simpler process than sexual reproduction.

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Match these items.

1. imprint of plant or animal
original-remains fossil
2. undecayed plant or animal part
carbonized fossil
3. replaced by a mineral
petrified fossil
4. only carbon remains
cleavage
5. mountain
geology
6. from magma
metamorphic
7. from physical and chemical changes
igneous
8. sandstone
print fossil
9. helps identify rocks
landform
10. science of Earth
sedimentary

Answers

1. print fossil

2. carbonized fossil

3. petrified fossil

4. cleavage

5. landform

6. igneous

7. metamorphic

8. print fossil

9. geology

10. sedimentary

The print fossil, original-remains fossil, petrified fossil, carbonized fossil, landform, igneous, metamorphic, sedimentary, cleavage, and geology are the respective matches as given in the question.

Print fossil is imprint of plant or animal and basically known as fossil impression. Original-remains fossil comprises of the original tissues and parts of organism and undecayed plant or animal part. Petrified fossil is replaced by a mineral. Carbonized fossil is only carbon remains. Landform is a mountain. Igneous is from magma.

Metamorphic is from physical and chemical changes. Sedimentary rocks are sandstone. Cleavage helps to identify rocks. Geology is the study of science of earth.

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When balancing a chemical equation, which of the following are you allowed to do?

Take away substances

Add coefficients

Change subscripts

Add new substances

Answers

You are only allowed to Add coefficients

Answer:

Add Coefficients

Explanation:

You CAN'T change the identity of an element or substance in an equation. You can only change coefficients.

7: How many times can a volcano erupt?

Answers

Answer:

Some small volcanoes only erupt once in their lives,

while other volcanoes erupt multiple times. Kilaeua volcano in Hawaii, which has been erupting continuously since 1983, is the world's most active volcano. While some volcanoes erupt at regular intervals, there are always exceptions to the rule

Answer:

small volcano's only 1 time while big volcano's mutiple times

Explanation:

Compare the Engineering Design Process and the Scientific Method! Give 6 Similarities and 6 differences for each one! Be creative in how you compare them!

Answers

Scientists use the scientific method to make testable explanations and predictions about the world. A scientist asks a question and develops an experiment, or set of experiments, to answer that question. Engineers use the engineering design process to create solutions to problems

Which is a property of every mixture?

One substance dissolves in another substance.
The molecules of one substance break down in the other.
Different samples of a single mixture have different characteristics.
One substance can be separated from another through physical means.

Answers

One substance can be separated from another through physical means

The property of every mixture is that One substance can be separated from another through physical means.

What is a mixture?

A mixture is when two or more substances mix with each other without participating in a chemical change. The combining substance does not lose its properties or individuality in a mixture.

In other words, the components of a mixture each keep their original properties.

Since mixtures are chemically combined, they can be easily separated by physical means.

Examples of a mixture are crude oil, air, seawater, and gun powder.

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A restaurant advertises that it is environmentally friendly. It describes the solar panels it uses to generate electricity and the locally grown produce it serves. All the meals it offers are prepared over an open wood fire. Food is served on recycled copper plates, and drinks are served in recycled aluminum cups.

Which correctly lists three renewable resources used by the restaurant?

aluminum, copper, produce
copper, produce, sunlight
produce, sunlight, wood
sunlight, wood, aluminum

Answers

Answer:

produce, sunlight, wood

The renewable resources used by the restaurant are

produce, sunlight, wood

What are renewable resources?

Renewable resources are resources which can be replenished after being used up.

Renewable resources include water, sun energy, wind, trees and animals.

The environmentally friendly restaurant will use things that would not cause environmental damage.

Based on what they use, three renewable resources used by the restaurant are solar energy, locally grown produce and wood.

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Help RRLY EASY I JUST DONT UNDERSTAND

Answers

Answer:

boomer

Explanation:

Do you think rayon when burnt will stick to the body like other synthetic fibers?

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In other words, since rayon is made from the plant fiber it does not get stick to our body while we burn it

it will not stick to the body most likely

Please help with this question!

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it is 5 m/s. You just divide

Why is it easier for most metal elements to gain electrons rather than to lose them?
PROPER EXPLANATION

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Because it is easier for metals to shed their valence electrons and form cations for a stable configuration, they have comparatively few chances of acquiring electrons.

The metals usually complete their octet in each reaction. The outermost electron shell often contains more electrons in metals. Metal atoms lose electrons when they interact with other non-metals because the energy of an electron in its outermost shell is very weak.

Metals often have low ionization energy because their electrons are positive in nature. Metals lose their electrons and trade them with non-metals to achieve a stable configuration.

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Answer:

metals typically have relatively low ionization energies

Explanation:

help me fill this page with the right answer please (17 lines minimum please)

Answers

I am water moleculeI have to first bear the heat of sun .Then the heat evaporates me into vapours I am send to the atmosphere with my brothersThen I have to form clouds Then precipitation or density of our brothers increasesWe keep increasingThen once a time comes when we are full We then condensed down to earthWe comes back in the form of rainThen either we are stored in some place or undergroundThen people collects us from different places like pond,river etc

Hey Lenny lately I’ve been having a rough time in the water cycle. It all started when I was chilling in my favorite location the “glaciars” and suddenly the sun turned me into liquid form. Next thing I know I am hurdling down a river straight into a massive lake. Personally this is my least favorite stage of the water cycle because of kids and bacteria that lurk in the water, very scary things. I didn’t stop at the lake very long, and instead sunk into the soil in a process called collection so I could become ground water. Underground reservoir’s are much more peaceful then lakes and I wanted to stay there. However I was forced up a water well pump shortly after and sent through a long tube. Me and couple of the friends I met on the way were all dispersed over a giant grass feild. Many molecules in the group were captured by the hostile plants but I escaped through the means of evaporation. Currently I have condensed into cloud form and I am roaming the skies looking for you, when you get this let me know and I’ll percipitate in your area! P.s I found this photo of us freezing over in the ice age lollll.

current flows between the reigons of opposite electrical charge, forming a _________.

Answers

Answer:

Lightening bolt

Explanation:

Lighting bolt
Is the answer

The diagram illustrates the water cycle.

Parts of the water cycle labeled U through Z. U: Water moving from a lake into the clouds. V: Clouds. W: Water falling from clouds as rain and snow. X: Water moving from ground to the clouds. Y: Water flowing down the mountainside into a lake. Z: Underground water going into lake.
Which letter represents runoff?

A. U
B. W
C. X
D. Y

Answers

the answer is D.
water flowing down the mountain side into a lake

(Look only at question 4) Match each stage of a star with its definition.

Answers

Black hole is E
Planetary Nebula is D
White Dwarf is E
Neutron Star is B
Supernova is A

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