What is the solution to the problem rounded to the correct number of significant figures?

12.77 + 0.8 = ?

Answer:

55,000,000

Explanation:

550 hectometers [hm] = 55,000,000 millimeters [mm]

Answer:

Explanation:

The significant figures are determined by 2.0. It only has 2 places, so the answer to the last question is 2.

The English unit is 67.6 oz

The metric unit is 2 L

So there are 67.6 fl oz / 2 L = 33.8 fl oz / L

In other words 1 liter has 33.8 fl oz

But you only have 2 sig digs so the answer is actually 34 fl oz/L

Answer:

Explanation:

CH₃COOH(aq) + NaHCO₃(s) -> CO₂(g) + H₂O(l) + Na+(aq) + CH₃COO-(aq)

The equation is already balanced .

In the reaction acetic acid reacts with sodium bicarbonate to produce carbon dioxide gas , water and sodium acetate . Sodium acetate will be in ionic form ie in the form of Na⁺ ( sodium ion ) and CH₃COO ⁻ ion ( acetate ion ) .

This is an acid base neutralisation reaction . one mole of acetic acid reacts with one mole of sodium bicarbonate to produce one mole of carbon dioxide gas , one mole of water and one mole of sodium acetate in ionic form .

Answer:

Yes, bikes with larger tires help you go faster.

B: if a person rides a bike with larger tires ,then the person with move faster than on a bike with smaller tires

Explanation:

Bikes with larger wheels cover more distances in one revolution, when compared to bikes with a much smaller wheel, if the wheels are turning at the same revolution per minutes. Although more effort is put into turning a big wheel, when compared to that for a smaller wheel, but it will go faster if you can keep it spinning at the same rate as a small one.

Answer: kindly check explanation

Explanation:

Characteristics of scientific thinking and investivating:

1) Empiricism : Also called empirical evidence maybe classed as natural evidences used to butress or support a certain notion or fact usually attainable from experience or teaching.

11.) Rational : Rational thinking or attribute could simply be tagged as reasonable and do not negate laid down facts.

111.) Skepticism: This is very imperative in scientific research as it opens the way to further research enabling researchers to gather more evidences required to establish a strong argument.

2.) IMPORTANCE OF SCIENCE LITERACY

Science literacy simply empowers mankind. Nourishing researchers or literates with the knowledge of its natural environment and enabling them understand, explore and exploit resources in our environment.

3.) Skills and tools scientist need :

Skills :

1) Curiosity: The ability to frame and and ask questions is key to establishing a purpose for research. Asking the right questions is key in a scientific process.

11) Data gathering or collection: Obtaining the right data capable of proferring the essential solution to our research question is key to obtaining logical insight.

111) Communication: Once research is complete, it is essential that researchers possess the skills required in transmitting their conclusion in a way which is both simple, logical and sensible.

Tools include common laboratory equipments such as beaker, testube, measuring cylinders, microscope and so on.

4.) The scientific or inquiry method provides a stepwise, easy to understand and logical approach to problem solving, Hence, providing a lucid and evidence - based conclusion which is both practicable and reproducible.

5.) The main reason for the modification of scientific theories is that they are susceptible to further research or study. As a result of evolution and change in trend depending on various natural and environmental factors, modification may occur in the form of review without abrogating previously existing studies.

6.) Science and technology has enabled mankind to adjust and cope with the continuous evolutionary changes in our environment. Enabling us to use these findings to ease our everyday living standard.

Answer: How The World Works

Explanation: Our world is made out of atoms, molecules and ions. Their behavior determines the properties of the substances we encounter in our daily lives: their structure, color, smell, and the way they interact with each other.

Answer:

b

Explanation:

Answer:

B

Explanation: All answers are true

Answer:

85.6 °C

Explanation:

Precision in scientific measurements refers to how close together the results of a repeated scientific measurement is. In this particular case where the melting point of fluorenone is being determined, precision refers to how close together the values from repeated measurements of the melting point of fluorenone is.

If we look at the values, the only one that is not close to others is 85.6 °C. Hence, if we remove this particular value, the data can be regarded as being precise.

Answer:

its C

Explanation:

how i know is did it on a piece of paper and got C for the answer. Have a nice day!

Answer:The answer is C:two or more forms of an atom that contain different numbers of neutrons. An isotope is when there are different forms of an atom, in terms of neutrons. Not to be confused with cations or anions, which are atoms with a difference of electrons or protons, making them charged.

Explanation: I took chemistry in 6th grade.

Answer:

Anodizing is an electrochemical process that converts the metal surface into a decorative, durable, corrosion-resistant, anodic oxide finish. ... Anodizing is accomplished by immersing the aluminum into an acid electrolyte bath and passing an electric current through the medium.

Answer:

Anodising is a process of forming a thick oxide layer of aluminium. Aluminium develops a thin oxide layer when exposed to air.  This Aluminium oxide coat makes it resistant to further corrosion. The resistance can be improved further by making the  oxide layer thicker. During anodising, a clean aluminium article is made the anode and is electrolysed with dilute sulphuric acid. The oxygen gas evolved at the anode reacts with aluminium to make a thicker protective oxide layer. This oxide layer can  be dyed easily to give aluminium articles an attractive finish

Answer:

20 m/s

Explanation:

Explanation:

Over 99.9% percent of an atom's mass resides in the nucleus. The protons and neutrons in the center of the atom are about 2000 times heavier than the electrons orbiting around it.

Because the electrons are so light by comparison,they represent only a tiny fraction of a percent of the atom's total weight.

Hope this answer helps you!

Answer:

Precise, but not accurate

Explanation:

First, let’s define accuracy and precision.

⇒Accuracy: how close you are to the actual value

⇒Precision: how close the measurements are to each other.

Let’s examine the data given:  

12.13 g, 12.12 g, 12.13 g, and 12.11 g

Each number is or is very close to 12.12 (within 0.1)

The actual mass of the object is 17.13 grams. Each measurement is about 5 grams away from the actual mass.

Since the measurements are very close to each other, but quite far from the true value, we can say the results are precise, but not accurate.

Answer:

Water

Explanation:

Because it has a higher specific heat capacity.

Water is a better coolant than methanol due to its high specific heat capacity.

The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.

It is a measure of how much energy it takes to raise the temperature of a substance. It is the amount of heat necessary to raise one mass unit of that substance by one temperature unit.

Methanol effective in preventing the coolant from freezing, its low boiling point and low specific heat capacity led to considerably less cooling than water alone. Also, the concentration of methanol would tend to be reduced over time due to its greater tendency to evaporate than the water with which it was mixed.

Learn more about Specific heat, here:

https://brainly.com/question/31608647

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Answer:

maltose

Explanation:

If we intend to determine the largest molecule, then we must look at the relative molecular mass of each molecule because the larger the molar mass, the larger the molecule.

Hydrogen =2 gmol-1

Carbon dioxide = 44 gmol-1

Ammonia = 17 gmol-1

Maltose= 342.3 g/mol

Hence maltose is the largest molecule among the options.

Answer:

See explanation

Explanation:

Sr(s) + 2HCl(aq) -----> SrCl2(aq) + H2(g)

Ionically;

Sr(s) + 2Cl^-(aq) ----> SrCl2(aq)

If we look at the reaction above, strontium atom was dissolved in hydrochloric acid. The strontium atom is now oxidized by the acid to give Sr^2+ ion according to the equation shown above.

Answer:

3

Explanation:

Lithium's atomic number is 3. it has 3 protons in its model

Answer:

A drug administered at a rate of 13.5 cL/hour has a rate in μL/s of 37.5 μL/s

Explanation:

The given rate at which the blood is administered  = 13.5 cL/hour

The rate at which the question asked to be administered = μL/s

The conversion factor between cL and μL is given as follows;

1 cL = 10,000 μL

Which gives;

13.5 cL/hour × 10,000 μL/cL × 1 hour/(60 × 60 seconds) = 37.5 μL/s

Therefore, a drug administered at a rate of 13.5 cL/hour has an administration rate of 37.5 μL/s.

Answer:

iodine sodium preocide

Explanation:

hang hsudb

Answer: The stick model method

Answer:

D. The stick model method

Explanation:

Answer:

The average yearly rate of change of carbon-14 during the first 5000 years = 0.0004538 grams per year

Explanation:

Given that the mass of the carbon 14 at the start = 5 gram

At the end of 5,000 years we will have;

[tex]A = A_0 \times e^{-\lambda \times t}[/tex]

Where

A = The amount of carbon 14 left

A₀ = The starting amount of carbon 14

e = Constant = 2.71828

[tex]T_{1/2}[/tex] = The half life

[tex]\lambda = 0.693/T_{1/2}[/tex]

t = The time elapsed = 5000 years

λ = 0.693/[tex]T_{1/2}[/tex] = 0.693/5730 = 0.0001209424

Therefore;

A = 5 × e^(-0.0001209424×5000) = 2.7312 grams

Therefore, the amount of carbon 14 decayed in the 5000 years is the difference in mass between the starting amount and the amount left

The amount of carbon 14 decayed = 5 - 2.7312 = 2.2688 grams

The average yearly rate of change of carbon-14 during the first 5000 years  is therefore;

2.2688 grams/(5000 years) = 0.0004538 grams per year

The average yearly rate of change of carbon-14 during the first 5000 years = 0.0004538 grams per year.

The Answer your looking for is

He walked  the distance of: = 184 m

Answer:

The correct answer is : 44 dollars.

Explanation:

A quarter is one fourth of a dollar that is the reason it is known as quarter. A quarter is 25 cents or 0.25 dollar in value. If Matthew has 176 quarters in his jar than the value of the total coins would be:

1 quarter = 0.25 dollar

1 quarter = 1/4 dollar.

4 quarter = 1 dollar

then, 176 / 4 = x dollar

 = 44 dollar

Thus, The correct answer is : 44 dollars.

Answer:

There exists a relationship between pressure and volume through Boyle's Law. It states that when temperature is held constant in thermodynamic syatems, the volume increases as the pressure decreases (and is true the other way around).

Hope this helps :)

Answer:

Mass of liquid ammonia is 0.035g.

Explanation:

I hope this will help u

Have a nice day

Answer:

Quantitative and Qualitative :)

Explanation:

Answer:

Density=mass / volume.

Density=6×24=144g/cm^3.

Answer:

0.25 g/mL

Explanation:

Density = mass/volume

Volume = 24.0 mL

Mass = 6 grams

Density = 6 grams/24.0 mL

Density = 0.25 grams/mL