Dimensional analysis, Plz hell I don’t understand and plz explain

Answer:

Number of protons = 52, Number of electrons = 52, Number of neutrons = 76

Explanation:

Protons, neutrons, and electrons are the fundamental subatomic particles.

Answer:

Each molecule of HCl is composed of a one-to-one ratio of hydrogen and chlorine.

Explanation:

At room temperature, HCl is a colorless, poisonous gas. Dissolve it in water, and, voilà, you have hydrochloric acid. For the record, acids are substances that release hydrogen ions in water. The more hydrogen ions an acid releases in water, the stronger the acid (see "What is an ion?" below). If you concluded from the above discussion that HCl releases many hydrogen ions in water, you are right!

The ratio of atoms in HCl is

The ratio of atoms in hydrogen chloride shortened as HCl is 1:1. This is because there is only one atom of hydrogen that is reacted with another atom of chlorine. A ratio indicates the relative sizes of two or more quantities.

When given another compound like H₂ SO₄, we can describe the elements as being in the ratio of 2:1:4. Thus, we can see the relative quantities of the individual elements in the given compound.

In conclusion, the ratio of atoms in HCl is 1:1.

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Answer: 205000000 microliter

Hope this helps!

Answer:

2.05 x 10⁸ uL

205000000 uL

Explanation:

Step 1: Find the conversion

1 liter (L) = 1 x 10⁶ microliters (uL)

Step 2: Set up dimensional analysis

[tex]205 L(\frac{1(10)^6uL}{1L} )[/tex]

Step 3: Multiply and cancel out units

Liters and Liter cancel out.

We are left with uL

205(1 x 10⁶) = 2.05 x 10⁸ uL or 205000000 uL

Answer:

1) Heat capacity

2) Thermal Conductivity

3) Heat reflection

Explanation:

The heat capacity of a body is the heat required to raise the temperature of the given mass of the body by 1° C.

The heat capacity = Mass × Specific heat capacity

Given that the mass of the ocean, which covers 70% of the Earth's surface has a much larger mass than a given unit of sand and that the specific heat capacity for the water (4,200 J/(kg·°C)) is much more than that of the sand (800 J/(kg·°C)), the heat required to raise the temperature of the mass of sand by 1°C is much less than the heat required to raise the temperature of the temperature of the ocean by 1°C

Therefore, the sand will have a higher temperature than the ocean when exposed to the same Sunlight

2) The ocean has a thermal conductivity of 0.5 W/(m·°C) the thermal conductivity of sand is 2.05 W/(m·°C), therefore, sand takes heat from the Sun faster than the ocean which also increases its temperature

3) The albedo, of the ocean is more than that of the sand so the ocean absorbs more of the Sun's heat than the sand but very little of the heat is conducted.

Answer:

Gases, liquids and solids are all made up of atoms, molecules, and/or ions, but the behaviors of these particles differ in the three phases. ... gas are well separated with no regular arrangement. liquid are close together with no regular arrangement. solid are tightly packed, usually in a regular pattern.

Hope this helped :)

Answer:

proteins carry out most of the life sustaining functions of the human body

Answer:

Scientific Question: ... I will boil water and add a substance like salt to see if the boiling point increases.

Answer:

greater than 115 N upwards

Explanation:

Answer:

The average atomic mass of an element is the sum of the masses of its isotopes, each multiplied by its natural abundance (the decimal associated with percent of atoms of that element that are of a given isotopе). An element does not have an absolute atomic mass.

Hope this helps :)

Answer:

Melting and boiling point

Explanation:

For all group 1 elements, the melting and boiling point of the various members of the group decreases down the group. Hence, as the elements become heavier, they tend to have lower melting and boiling points.

Thus in moving from lithium to francium, there is a steady decrease in the melting and boiling points of elements down the group.

Answer:

3.4  ×  10 ^− 4

Explanation:

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the  

10 . If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

Answer:

One serving is 1/4 cup therefore 1 cup would be 4 servings. Since we have 9 cups we would then multiply 9 x 4 and the answer would be 36 servings. You have a ratio of cups to serving, so 1/4 cup : 1 serving, or .

Explanation:

Answer:

This question is incomplete, the remaining part of the question is:

What is the control group, independent variable and dependent variable?

Control group: Plants placed in 80 degree rooms

Independent variable: Change in temperature

Dependent variable: Change in color of leaves

Explanation:

The independent variable in a scientific experiment is the variable that the experimenter controls or manipulates in order to bring about a change in the dependent variable. In this experiment, the variable manipulated by Justin B is the TEMPERATURE CHANGE.

On the other hand, a variable is said to be dependent if it is the variable that responds to a change made to the independent variable or rather it is the outcome. In this experiment, Justin B is trying to see the outcome on the color change in leaves when exposed to a low temperature, hence, COLOR CHANGE IN LEAVES is the dependent variable.

Control group of an experiment is the group that receives no experimental treatment. It is the group the experimenter considers normal and hence is comparing with his experimental group. In this experiment, Justin B believes the leaves change color in a low temperature, hence, he placed some plants in a lower temperature (60 degree) in order to compare them with when the plants are placed in a higher temperature (80 degree). As far as this experiment is concerned, the plants placed in 80 degrees temperature are believed by Justin B not to undergo color change, hence, they are the CONTROL GROUP while the group he placed in 60 degrees temperature are what he is interested in, making them the EXPERIMENTAL GROUP

Answer: d collect the data

Explanation:

Collecting the data and making observations comes right before the "analyzing the data" step of the scientific method. Therefore, option (D) is correct.

The scientific method can be described as an empirical method for acquiring knowledge that has developed in science since at least the 17th century.  

The scientific theory includes careful observation, applying what is observed, given that assumptions can distort how one interprets the observation. . A scientific hypothesis is possible to identify a possible outcome of an experiment that conflicts with predictions deduced from the hypothesis.

The scientific theory involves hypotheses, through induction, based on such observations, the testability of hypotheses, experimental and measurement-based statistical, and elimination of the hypotheses based on the experimental findings.

The process in the scientific method includes making hypothetical explanations, and predictions from the hypotheses as logical consequences and then conducting experiments or empirical observations based on those predictions.

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Answer:

I think B

Explanation:

Answer:

Anode

Explanation:

Answer:

-8 m/s^2

Explanation:

The formula for acceleration is:

a= v^2 - v^1/t

a= acceleration

v^2- final velocity which in this case would be 0 since the jet comes to a stop.

v^1= original velocity which is 80 m/s.

t=time or 10s

Substitute the letters for the numbers and you get this:

a= 0 - 80/10

0 - 80= -80

-80 divided by 10 is -8.

Hope this helps! :)

Answer:

The average velocity of the airplane for this trip is 1684.21 km/h

Explanation:

Average velocity is the rate of change of displacement with time. That is,

Average velocity = [tex]\frac{Displacement }{Change in time}[/tex] = Δx / Δt = [tex]\frac{x2 - x1}{t2 - t1}[/tex]

Now we will calculate the time taken by the airplane for the first motion before it encounters a wind.

From,

Velocity = [tex]\frac{Distance traveled}{Time taken}[/tex]

Time = [tex]\frac{Distance traveled}{Velocity}[/tex]

Therefore, Time = [tex]\frac{2100km }{1000km/h}[/tex]

Time = 2.1h

This is the time taken before the airplane encounters a wind.

Hence, t1 = 2.1h

Now, For the time taken by the airplane when it encounters a wind

Also from,

Velocity = [tex]\frac{Distance traveled}{Time taken}[/tex]

Time = [tex]\frac{Distance traveled}{Velocity}[/tex]

Therefore, Time = [tex]\frac{1300km }{800km/h}[/tex]

Time = 1.625h

Hence, t2 = 1.625h

Now, to calculate the average velocity

Average velocity = [tex]\frac{x2 - x1}{t2 - t1}[/tex]

x1= 2100, x2= 1300, t1= 2.1h and t2= 1.625h

Hence, Average velocity = [tex]\frac{1300 - 2100}{1.625 - 2.1}[/tex]

Average velocity = 1684.21 km/h

Answer: How do contrasting colors affect the quality of a painting

Answer:

The answer is D.

Explanation:

I just took the test. :)

Answer:

The power of Niagara falls is 1,176 Mega Watts

The number of 15 Watt bulbs it can power is 8,400,000 bulbs

Explanation:

The rate at which the water falls given as the mass flow rate = 2,400,000 kg/s

The height from which the water falls = 50 m

The gravitational potential energy (potential energy PE.) of falling water = Mass (kg) × height (m) × gravity (9.8 m/s²)

The mass of water that falls per second = 2,400,000 kg

PE. = 2,400,000 kg × 50 m × 9.8 m/s² = 1,176,000,000 Joules

The power = The rate at which the energy is generated = The amount in kg of water that fall from the height per second × The height × Acceleration due to gravity

The power = 2,400,000 kg/s × 50 m × 9.8 m/s² = 1,176,000,000 Watts

The power of Niagara falls = 1,176,000,000 Watts = 1,176 Mega Watts

The number of 15 Watt bulbs it can power = 1,176,000,000/15 = 78,400,000 bulbs

The number of 15 Watt bulbs it can power = 8,400,000 bulbs.

All of the measurements have 4

The number of significant figures in each of these measurements of an object's length: a. 4  b. 4 c. 4.

The significant figures are the digits or numbers from zero to nine which are used to signify and specify the reporting of the measurement having uncertain digits.

Starting zero is not significant, decimal is not significant, ending zero after the decimal is significant and ending zero before and without decimal is not significant.

Therefore, a. 76.48 cm = 4 b. 76.47 cm c. = 4 76.59 cm = 4 are the number of significant figures in each of these measurements of an object's length.

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Answer:

THE PERCENT ERROR IS 5.55 %

Explanation:

To calculate the percent error, we use the formula:

Percent error = Found value - accepted value / accepted value * 100

Found value = 2.85 g/cm3

Accepted value = 2.70 g/cm3

Solving for the percent error, we have:

Percent error = 2.85 g/cm3 - 2.70 g/cm3 / 2.70 g/cm3 * 100

Percent error = 0.15 / 2.70 * 100

Percent error = 0.05555 * 100

Percent error = 5.55 %

In conclusion, the percent error is 5.55 %

Answer and Explanation:

Bohr's model of the atom defined the electron as a particle that orbits around the nucleus in only certain orbital levels. As a result, it couldn't readily give account of the energy levels of larger elements with high atomic number.

The quantum model of the atom however, approaches the electron in an atom as not just a particle but a wave, with its distinct quantum number per energy level. It can therefore give the position and speed of an electron simultaneously at any energy level.

I hope this explanation is sufficient.

Answer:

Active transport

Explanation:

Active transport is defined as the movement of ions or molecules from a region of lower concentration into a region of higher concentration by the use of energy. Two examples of active transport include the uptake of glucose in human intestine and the absorption of mineral ions into plant roots.

Active transport requires energy because it involves the movement of molecules against an existing concentration gradient.

Answer:

Al: 3

S: 6

Explanation:

Al is in Group III. This means that it has 3 valence electrons.

S is in Group VI. This means that it has 6 valence electrons.

I hope this helps :)

Answer:

First, we can test Solution 1. We know that Sodium Hydroxide is a strong base. If we test acids on blue litmus paper, they will turn red. If we test bases on red litmus paper, they will turn blue.  So, you can test all the of the solutions- water, sodium hydroxide and hydrochloric acid with blue and red litmus paper. HCl, Hydrochloric acid is an acid, so it will turn blue litmus paper red. It will not turn red litmus blue. The acids will turn blue litmus paper red. The bases will turn red litmus paper blue. Only water is a neutral liquid, which will not turn blue litmus paper red or red litmus paper blue. It will not change the colour of it. Thus, if you test all the solutions with blue and red litmus paper, you will know which solution is water.  Water is the only one which is neutral. It is the only solution which cannot change the colour of any litmus paper. Thus, you can identify it very easily.  

Answer:

collecting relevant data

Explanation:

got this answer from another website ;)

Answer:

15.2

Explanation:

the chemical reaction in chemistry libretto texts.

Answer:

Neither

Explanation:

Density is independent of size. Basically, the density of an object isn't determined by it's size.

If two objects are made of the same exact material, they will have the same exact density, regardless of the size.

So, the large brick and the small brick will have the same density, as long as they are made from the same type of brick material.