Chemistry Middle School

plzz write a small pharghraph
Question:

A 250mL Erlenmeyer flask weighing 55g contains 5g of sodium bicarbonate. To this, an excess, 15g, of acetic acid is added to the flask. While swirling, many bubbles are present. Finally, you stop swirling the flask, and the bubbles stop. You then place this flask on an analytical balance. The mass registers 73g.

How does this final mass compare with the value expected according to the Law of Conservation of mass?

Why do you believe that this comparison exists?

State the Law of Conservation of Mass. Do these results break this law? Why?

What changes, if any, could be made to the procedures in this experiment to allow a closer comparison to what the Law of Conservation would expect?

Answers

Answer 1
You should download Socratic it’s a real good app for answers !
Answer 2
At first glance, the final mass does not follow the Law of Conservation of Mass because, according to the law, the final mass should be 75g. This comparison likely occurred because stirring the flask created bubbles, suggesting that one product of the reaction is a gas. The Law of Conservation of Mass states that the mass of the reactants must equal the mass of the products. One product happened to be gas that escaped through the opening of the flask, meaning that the results were not completely accurate and do not break the law. One change to make to the experiment would be to seal the flask closed after adding both reactants to ensure that gas doesn’t escape.

Related Questions

which chemical process is illustrated below?

which chemical process is illustrated below?

Answers

Answer:

I believe it is D, Dehydration synthesis of amino acids to form a dipeptide

I would also say it is D! Good luck!

What was the name for the spectrum of specific wavelengths produced by an existing element?

Answers

the emission spectrum of a chemical element
Emission spectrum or atomic spectrum

Classify the following substances as:


Pure Substance – Solution – Mechanical Mixture –

Suspension –




Milk

Coffee (black)

Soil

Sugar

Lemon juice

Salad Dressing

Answers

i’m not sure maybe coffee
Milk - Suspension
Coffee - suspension
Soil - Mechanical mixture
Sugar - pure substance
Lemon juice - solution salad dressing - mechanical mixture


I’m not completely sure if it’s all correct though. Sorry

What was one was one important impact of Supreme Court's ruling in Bush v. Gore

What was one was one important impact of Supreme Court's ruling in Bush v. Gore

Answers

Answer: the answer is b or c

Explanation:

I took it

The answer is C, i took that test before and got it right

If two unbalanced forces act on an object in opposite directions, the object will move in the direction that the stronger force is acting.

If two unbalanced forces act on an object in opposite directions, the object will move in the direction

Answers

Answer:

A because weight is relative to the mass of an object

You eat a sandwich. What molecule does your cells need from this sandwich, and how does that molecule get from the sandwich to your cells?

Don't look anything up

Answers

something too full you

Answer:

in a sandwich ELISA, the goal is to use antibodies to precisely quantify specific antigen present in a solution, such as antigen from a pathogen, a serum protein, or a hormone from the blood or urine to list just a few examples. The first step of a sandwich ELISA is to add the primary antibody to all the wells of a microtiter plate

Explanation:

Brainliest please

HELP PLEASE QUICKK!!

HELP PLEASE QUICKK!!

Answers

Answer:

A- Negative, Outside,9.10938356 × 10-31 kilograms

B- Nothing, in the middle so in, 1.67493 × 10−27 kg

C-Positive, Nucleus, 1.6726219 × 10-27 kilograms

A: Electron,Charge: Negative,Location: Electron Cloud
B: Neutron, Charge: Neutral, Location: Nucleus
C: Proton, Charge: Positive, Location: Nucleus

What was the low temperature for hurricane Katrina?

Answers

Answer: 90 degrees F

Explanation:

The temperature was 90 F (32 C)

What is the force called that is applied to an object and it's NOT opposite and/or equal?

Answers

i think the answer would be velocity.

Answer:

velocity

Explanation:

____________ electricity is a quick burst of energy which is produced by charged particles.

Thank you <3

Answers

Static is the answer
it’s static electricity!

a) The formula of a compound is AB. If the valency of B is 3, what will be the valency of A? b) Baking soda is a white solid and has the formula NaHCO3. How many of each type of atoms are there in it?

Answers

Answer:

The valency of B will be 5

Baking soda contains one sodium atom, one hydrogen atom, one carbon atom, and three oxygen atoms

Explanation:

Hope it will help you:)

Answer:The valency of B will be 5

Baking soda contains one sodium atom, one hydrogen atom, one carbon atom, and three oxygen atoms

Explanation:

On this number line, zero represents sea level. Plot the following points based on the description provided by dragging and dropping the dots to the appropriate locations on the number line.







greatest common factor of 8 and 12

where does this go on the number line

Answers

The greatest common factor would be 4
On the number line
The correct Answer is 4

Which statement best describes how energy and matter move in a wave?
A
A wave transports energy without transporting matter.

B
A wave transports matter without transporting energy.

C
Neither energy nor matter is transported by a wave.

Answers

Answer:

A wave e transports energy without transporting matter

Answer:

the answer is A. a wave transpory energy without transporting matter

Help I don’t know what I should choose heelppp

Help I dont know what I should choose heelppp

Answers

Answer:

It is either c or d. Hope this helps. Please tell me if I was right or wrong.

Explanation:

Answer:

it would be air, oil, water so non of the above is my answer

What would be the relative difference between the currents required by a 60 Watt light bulb and a 100 Watt light bulb? Assume that the voltage supplied to them is the same. (A common household wall outlet in the United States delivers 120 volts).

Answers

Answer:

The 100 watt light bulb gives more light then a 60 watt light bulb would give.

Explanation:

I did this question a while ago.

Answer: 40 watts

Explanation: There is an actual difference of 40 watts between 100 and 60 watts. Only about 60% of the current can be consumed by a 60-watt bulb. On the other hand, a 100-watt light bulb also ejects more light and heat in comparison with a 60-watt bulb.

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How do you make an atom model? PLEASE HELP ANY IDEAS GUYS?

Answers

Answer:

If you are looking for like a drawing say less.

How do you make an atom model? PLEASE HELP ANY IDEAS GUYS?
If you are physically making one you would need to 1. Glue balls together to represent protons and neutrons. This is the nucleus. Try to arrange them in an alternating pattern. 2. Glue the nucleus to the center of the cardboard. 3. Determine how many rings you need for the electrons. Starting from the innermost ring, you can have up to two electrons in the first ring, up to eight in the second ring, up to 18 in the third ring and up to 32 in the fourth ring. 4. Glue the string around the nucleus to make the energy level rings. 5. Apply a few drops of glue to each ring. 6. Glue the electrons on the rings, spacing them evenly. Make sure you don’t exceed each rings maximum number of electrons. If you are trying to draw one then you could easily find one online

30 POINTSSSSSSSSSSSSS how is increasing the amount of sunlight most likely to affect an ecosystem? A. by increasing soil moisture B. by decreasing photosynthesis C. by increasing plant growth D. by decreasing the food supply

Answers

Answer:

here

Explanation:

The increase in sunlight up to a limit might result in an increase in the photosynthesis process as well as in transpiration. More amount of energy will be produced by plants.

C. by increasing plant growth.

Methane is a gas at room temperature and pressure. Explain why this is the case.

Answers

Answer:

hope it helps ❤

Explanation:

Methane only has london dispersion forces since it is nonpolar. London dispersion force is the weakest intermolecular force, so the forces between its molecules will be weak. This leads to a low boiling point that is lower than room temperature, which makes it a gas at room temperature.

Methane has london dispersion forces since it is nonpolar. London dispersion force is the weakest intermolecular force, so the forces between its molecules will be weak. This leads to a low boiling point that is lower than room temperature, which makes it a gas at room temperature.

Which type of molecule is shown below?

Which type of molecule is shown below?

Answers

Answer:

\(\boxed{\mathrm{Alkene}}\)

Explanation:

The hydrocarbon shown has a double bond. Hydrocarbons with double bonds are known as alkenes.

Cyclic alkanes have cyclic structure.

Alkanes only have single bonds.

Alkynes have triple bonds.

Answer:

Alkene

Explanation:

A molecule having a double bond between its atoms is called an alkene.

So i have a question for my assignment...


"The scientific theory of plate tectonics states that the Earth's crust is composed of many plates, or stabs of rock. Interaction of these plates have created different landforms, or geologic, features. Which of the following statements provides evidence for this theory?"


A: The city of Pompeii is perfectly preserved under volcanic ash following the eruption of Mount Vesuvius.


B: A large earthquake off the coast of Japan induces a wave that is over twenty feet high.


C: Fossilized marine creatures can be found at the top of the Himalayan Mountains.


D: An iceberg buckles the hull of the titanic and allows waster to enter between the steel plates.


i need the answer quickly, please and thank you! :)

Answers

Answer:

B

Explanation:

A tsunami doesn't just happen, it happens by an earthquake or the movement of the plates.

I believe the answer is A, “The city of Pompeii is perfectly preserved under volcanic ash following the eruption of Mount Vesuvius.”

Which of the following was a major focus of the Mississippian belief system?

physical connection
an anointed leader
a single deity
spiritual connection

Answers

Answer:

i think answer is spiritual connection

spiritual connection

What is a biodiversity hotspot (definition)? Explain

Answers

Answer:

A biodiversity hotspot is a biogeographic region with significant levels of biodiversity that is threatened by human habitation.

Explanation:

A Biodiversity Hotspot is an area containing a huge number of species, a large percentage of which are endemic.

Please help, I don't get what does this means

3. Name the compound sodium makes with the following elements.
(a) Calcium carbonate: ​

Answers

Answer: hydrogen-carbonate.

Explanation:Because when carbon dioxide is passed in excess it leads to a formation of hydrogen-carbonate.

I hope everyone finds this helpful

the reaction of sodium and calcium carbonate gives sodium carbonate

A small gap is left between the rails in the railway track. Analyze the reason.

Answers

Answer:

There could be several possible reasons for a small gap between rails on a railway track, such as:

1. Expansion joints: Railways are designed to allow the tracks to expand and contract with changes in temperature. To accommodate this expansion, small gaps are left between the rail ends and filled with expansion joints or plates.

2. Wear and tear: Over time, the rails may experience wear and tear due to heavy loads, weather conditions, and other factors. As a result, small gaps can appear between the rails.

3. Maintenance: During maintenance activities, rail tracks may be adjusted or replaced, which could lead to small gaps between the rails.

4. Environmental factors: Environmental factors such as soil shifts, earthquakes or other natural disasters can also affect the alignment of the rails, leading to small gaps.

These are some of the possible reasons for a small gap between the rails on a railway track.

Answer:

The small gap left between the rails in a railway track is intentional and serves a specific purpose. This gap is known as the rail joint, and it allows for the expansion and contraction of the rails due to changes in temperature. When the temperature changes, the metal rails will expand or contract, and if they were joined together tightly, they could buckle or become deformed, which could be dangerous for trains passing over them. The rail joint allows the rails to move slightly and prevent damage to the track.

Additionally, the rail joint also allows for maintenance and repairs of the track. If there were no gap between the rails, it would be challenging to replace a damaged rail or perform routine maintenance, such as tightening bolts or lubricating joints. With the rail joint, maintenance personnel can easily access and work on the track.

Overall, the small gap left between the rails in a railway track is intentional and serves a crucial function in ensuring the safety and reliability of the track.

Are there any steps of the rock cycle that do NOT connect directly to one another? Explain why this may be the case using at least two examples.

please helpp

Answers

Answer:

rocks are destroyed

explanation

ricks are never destroyed they descompose

There are no steps in the rock cycle that do not connect directly to one another. The rock cycle describes the continuous process by which rocks are formed, weathered, eroded, transported, deposited, and lithified, leading to the formation of new rocks.

What are the steps in rock cycle ?

Each step of the rock cycle is interconnected and depends on the other steps. For example, the formation of sedimentary rocks requires the weathering and erosion of preexisting rocks, the transportation and deposition of the resulting sediments, and the lithification of the sediments into rock.

Without the weathering and erosion of preexisting rocks, there would be no sediment to form sedimentary rocks.

Similarly, the formation of metamorphic rocks requires the heat and pressure of burial and tectonic activity, which in turn is influenced by the existing rock formations and geological processes of the area.

Another example is the formation of igneous rocks, which can occur through the melting and solidification of preexisting rocks, or through volcanic activity.

Find more on rock cycle :

https://brainly.com/question/1574229

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A balloon is filled with 6.5 L of helium gas at 25oC and 1.0 atm. What volume will the balloon have when the temperature is lowered to -25oC and the pressure is increased to 1.5 atm?

Answers

honestly i have no clue. but u can

A weather balloon filled with hydrogen at 1 atm and -27^(h)C has volume equal to 1200 litres. On ascending, it reaches a place where temperture is -23^(h)C and pressure is 0.5 atm.

What is the relationship between reflection and diffraction? A. Reflection happens when a wave hits a hard surface, while diffraction only happens when a wave goes through air or water. B. Reflection happens when a wave hits a hard surface, while diffraction happens when two waves interact with each other. C. Reflection happens when a wave bounces back against an obstacle, while diffraction happens when a wave goes through an obstacle. D. Reflection happens when a wave bounces back against an obstacle, while diffraction happens when a wave bends around an obstacle.

Answers

answer:  D. Reflection happens when a wave bounces back against an obstacle, while diffraction happens when a wave bends around an obstacle.

i believe it is D, because reflection involves a change in direction of waves when they bounce off a barrier, and diffraction involves a change in direction of waves as they pass through an opening or around a barrier in their path.

What kind of rocks would you expect to see on Mars? What evidence supports your response?

Answers

Mars' surface is largely covered with basalt, a volcanic rock covering much of Earth's surface as well. Earth has large amounts of granite in its crust, which Mars appears to lack.
Based on the composition of the martian meteorites and the presence of plains and mountains that look like features produced by basaltic volcanism on Earth, geologists expected to find primarily basalts on Mars.

I HAVE A D- IN SCIENCE PLEASE HELP

Complete the sentence.

In chemical reactions, a product is _________.

A. any substance that is to the left of the arrow

B. any substance that is made of the greatest number of atoms

C. any substance that is made from the least number of atoms

D. any substance to the right of the arrow

Answers

Answer:

D - Any substance to the right of the arrow.

Explanation:

A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products . A product is a substance that is present at the end of a chemical reaction.

An acid solution contains more (hydronium, hydroxide) ions than (hydronium, hydroxide) ions.

Answers

Answer:

An acidic solution contains more hydroxide ions than hydroxide ions.

Explanation:

Answer:

An acidic solution contains more hydroxide ions than hydroxide ions.

Explanation:

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