Explain why chemical equations have to be balanced.

Answer:

Keep in mind this changes from microscope to microscope.

Explanation:

On most classroom microscopes, there will be two knobs on either side of the scope.  These will increase or decrease the height of the "stage", which is how you "focus" the microscope.  The larger knob will move the stage the most, and thus, is called the coarse focus.  The smaller knob is called the fine focus, and, you guessed it, will move the stage the least.  There are usually three "objective lenses".  Each will have a different magnification and will be listed on the lens itself.  It rotates around the "revolving nosepiece".  MAKE SURE THAT THE SLIDE IS LOWERED BEFORE ROTATING THE LENSES!!!!  If you don't you WILL break the slide and you WILL get death looks from the teacher.

On the stage, there are two clips.  They move NOT up and down, but they spin.  what you want to do is to move the slide into the clips.  They will not break if you do not bend them more than what the slide will bend them to.

The technique for focusing the microscope is really easy once you do it a few times.  After making sure that the microscope is plugged in and the light on and the slide and lens in the lowest position/magnification (!) move the coarse focus knob so that the object in the slide is just visible.  Once you do that, from there use the fine focus knob to make the object most visible.

These instructions vary slightly from model to model of microscope, but the picture below is very accurate and everything I warned you about is for all microscopes.

Answer:

In the United States alone, the AKC's dog breed list currently includes 190 dog breeds. Worldwide, the FCI lists 360 officially recognized breeds.

Explanation:

Answer:

39

Explanation:

Relative mass does not need to be calculated as it is listed on the periodic table. Potassium's relative atomic mass is around 39.

Answer:

The faster an object is moving, the more energy it can transfer. The amount of energy transferred between moving objects depends on the object's speed. Objects that are moving faster have a bigger impact because they transfer more energy.

Answer:

If two cars, one with a mass of 990 kilograms and traveling at 30 mph, and the other with a mass of 2,000 kilograms and also traveling at 30 mph, were to collide with each other, what would be the outcome of the collision in terms of the force of impact and the damage caused to the vehicles?

Answer:

A long range forecast is this answer

In mathematics, an ellipse is a plane curve surrounding two focal points, such that for all points on the curve, the sum of the two distances to the focal points is a constant. As such, it generalizes a circle, which is the special type of ellipse in which the two focal points are the same.

Maybe they might use that math thing for Science.

Answer:

If you put everything in the same column, then click done when there's two options, it'll put the ones that don't go into the column outside of the boxes and then you can out the remining ones into the other box. If you've already answered this once then it won't work and I'm really sorry for wasting your time. >.<

Answer:

The first is five and the second is ten

Explanation:

To prepare 250 mL of a D10/NS solution using D10W and a vial of NaCl 4 mEq/mL, you would need 9.6 mL of NaCl. Normal saline (NS) contains 154 mEq/L of sodium chloride (NaCl). To prepare 250 mL of NS, you would need 250 mL * (154 mEq/L) = 38500 mEq of NaCl. Since the vial of NaCl contains 4 mEq/mL, you would need 38500 mEq / (4 mEq/mL) = 9625 mL = 9.6 mL of NaCl. So the correct answer is b. 9.6ml.

Answer:

The statement is false.

Explanation:

In cellular respiration, the fuel (glucose) and oxygen are the reactants, and carbon dioxide, ATP and water are the products.

Answer:

It's False

Explanation:

Answer:

0.74176 M HCl

Explanation:

1) Write out a balanced equation.

  KOH + HCl --> KCl + H2O

2) Calculate #mol KOH in 76.0mL needed for the titration.

 1.22 mol KOH in 1000mL

 x mol KOH in 76.0mL

 x = 0.09272 mol KOH

3) Use the balanced equation ratio (from step 1), 1 mol KOH : 1 mol HCl.

0.09272 mol KOH = 0.09272 mol HCl

4) 125mL of the HCl solution was used for the titration, so find the molarity.

0.09272 mol HCl is in 125mL

x mol HCl in 1000mL

x = 0.74176 mol HCL / 1 L

SO... 0.74176 M HCl is the answer.

*hope this helped*

- A Kind Stranger

I suppose the last option to be correct.

Answer:

The cell dividing rapidly and creating a cancerous tumor

Explanation:

Answer:

This tightening and relaxing of muscles in quick succession causes a slight bodily shake or tremble. It's your body's way of generating heat. This momentary cold sensation or cold jolt can rip through your body unexpectedly — sometimes starting in the spine and moving downward

Explanation:

Answer:

b

Explanation:

i hope this helps, wish u luck

Answer: D or only 2 correctly describe the importance of soil

Explanation: Don't know what to put here.

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.

Know more about Bacteria: https://brainly.com/question/6941760

Fueled by propane cylinders, gas jets produce the hot air that fills the envelope (similar to ones you might use on a portable camping stove).

For more information on hot air balloon kindly visit to

https://brainly.com/question/11178349

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Answer:

Bonds can be placed on a scale that ranges from 100% ionic to 100% covalent.

CO2: CO2 is a covalent compound, with each carbon atom sharing electrons with two oxygen atoms. Therefore, it can be placed closer to the 100% covalent end of the scale.

N2: N2 is a covalent compound, with each nitrogen atom sharing electrons with another nitrogen atom. Therefore, it can be placed closer to the 100% covalent end of the scale.

NaF: NaF is an ionic compound, consisting of a sodium cation (Na+) and a fluoride anion (F-). Therefore, it can be placed closer to the 100% ionic end of the scale.

H2O: H2O is a polar covalent compound, with the hydrogen atoms sharing electrons with the oxygen atom, but the electrons are not shared equally, therefore the oxygen atom has a partial negative charge and hydrogen atoms have a partial positive charge. Therefore, it can be placed closer to the middle of the scale, between ionic and covalent.

Overall, the scale can be represented as follows:

100% Ionic <-------> NaF <-------> H2O <-------> CO2 <-------> N2 <-------> 100% Covalent

Answer:

273 Kelvin, 0 degrees Celsius, 32 degrees Fahrenheit

Explanation:

Answer:

Dead plants fall in swamp → layers of dead plants pile up → plant matter is buried by rocks and dirt → plant matter is compressed and is exposed to heat → coal forms

1. print fossil

2. carbonized fossil

3. petrified fossil

4. cleavage

5. landform

6. igneous

7. metamorphic

8. print fossil

9. geology

10. sedimentary

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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.

Learn more about rocks and fossils:

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Answer:b

Explanation:

Let us go option by option :

1) Genes are located in chromosomes. TRUE

Chromosomes are in cell nucleus. A chromosome contains hundreds and thousands of genes. A normal have 23 pairs of chromosomes, and a total of 46.

2) Chromosomes are the in nucleus.

TRUE

Chromosome is structure found in nucleus of the cell. It is made up of protein and DNA.

3) A single Chromosome can contain hundreds of genes.

TRUE

single Chromosome can contain hundreds of tgenes.

4) All of the above

TRUE

As all the statements above are true. The correct option is 4.

Answer:

all of them are true

Explanation:

this is because chromosomes contain genetic materials and it is present in the nucleus.
Therefore, the correct option is 4) all of these are true

no problem

Answer:

Intrusive

Explanation:

The intrusive rocks are also called as the plutonic rock. It is also considered as an igneous rock like granite and diorite. The rock which has a coarse texture due to slow cooling in magma chambers is intrusive rock. The correct option is B.

The intrusive rocks are formed when the magma penetrates some of the existing rock structures, it crystallizes and solidifies below the surface to produce intrusions and coarse texture. Hence the name called intrusive rocks.

There are two ways in which the igneous rocks can be formed which are the intrusion and extrusion of magma. When the magma is passed through the intrusions inside the Earth's crust it forms the intrusive rocks. Granites, sills, etc. are examples.

The intrusive rocks are highly characterized by the size, shape and texture of the crystals.

Thus the correct option is B.

To know more about intrusive rocks, visit;

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Answer:

Bacterial cell, cell with a nucleus, multicellular organism

Answer:

+6.

Explanation:

So, a chromium atom here has an oxidation number of +6.

Answer:

Present and future

Explanation:

I did the test. It's the MOD 2: Human Impact Quiz, right? I have Mrs. Wurzenberger from Elevation ;P

Answer:

sanctuary is the answer may be I think

Answer:Pls help!!! ILL GIVE BRAINLIEST, 70 points + 10 more if not plagiarized ty ty (also for those who scam and do it for the points will be reported)

Explanation:

Answer:

nucles membrane

Explanation:

brick