Multiply 3.2 mm times 5 mm and express the answer to the correct number of significant figures.

Answers

Answer 1

Answer:

Answer:

$\large \boxed{\text{ 20 mm}^(2)}$

Explanation:

In multiplication and division problems, your answer can have no more significant figures than the number with the fewest significant figures.

$\text{3.2 mm} * \text{5 mm} = \text{16 mm}^(2)$

There are two significant figures in 3.2 and one in 5.

$\text{You must round to one significant figure and report the answer as $\large \boxed{\textbf{ 20 mm}^{\mathbf{2}}}$}$

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Patience, a popular card game in Mendeleev's time, is also known asSolitaire.
O
A. True
O
B. False

Answers

True

Explanation:

The statement that patience, a popular card game in Mendeleev's time is also know as solitaire is very true. It was this card game that led to the discovery of the periodic table by Mendeleev in the 19th century.

In Europe, the game is called Patience. It is commonly called solitaire in in North America.
It involves the arrangement of a deck of cards.
The game inspired the invention of the periodic arrangement of elements by Russian Chemist, Dmitri Mendeleev.
Solitaire was popular card game around the time of this discovery.

Learn more:

periodic table brainly.com/question/8543126

periodic trends brainly.com/question/1971327

#learnwithBrainly

Answer: false

Explanation:

I hit true on the quiz and it was wrong

Scientists predicted Adamantium would have an Atomic radius of 327 pm. Once the element was measured experimentally, they found that the atomic radius was really 312 pm. Calculate the percent error of their prediction

Answers

The actual atomic radius of Adamantium is 327pm. The experimentally estimated value of atomic radius of adamantium is 312pm. The percent error can be calculated as,

Percent error = (actual value-estimated value)/actual value *100

= 327-312/327*100

=Approx. 5 percent error in their prediction.

During science lab, Jacob mixes together sodium hydroxide (NaOH) and hydrochloric acid (HCl). The two chemicals react to form sodium chloride (NaCl) and water (H2O).Which of the following are reactants in the chemical reaction described above?

Answers

Answer: NaOH and HCl are the reactants for the reaction described.

Explanation:

Reactants of a chemical reaction is defined as the substances which take part in a chemical reaction and undergoes a chemical change. These are written on left side of the arrow.

Products are defined as the substance which are formed at the end of the chemical reaction. These are written on the right side of the arrow.

For the reaction of sodium hydroxide and hydrochloric acid, the equation represents:

$NaOH+HCl\rightarrow NaCl+H_2O$

Here, NaOH and HCl are reactants.

The above reaction is a type of neutralization reaction.

NaOH(sodium hydroxide) and HCl( hydrogen chloride) are reactants.

if you were designing a pot to cook spaghetti in , which parts would you make from good conductors of heat ? which parts would you make from insulators ? explain your answer.

Answers

you would use materials such as metal or iron becuase materials such as metal and iron attract heat and allows heat to pass through meanwhile other materials such as wood would not allow heat to pass

you would make the part the spaghetti goes in with conductors && you would make the handle with insulators.

If an atom has 35 protons in the nucleus how many electrons will have orbiting the nucleus

Answers

35 electronics orbiting....

you have two solid substances that look the same. what measurements would you take and what tests would you perform to determine whether they actually are the same

Answers

The easiest way to go about this would be to check out their physical properties. Physical properties are those attributes of a substance or material that can be observed or measured without altering or changing the composition of that material.

So we can check out the following physical properties:

1. Color. Check if there is any difference in color.

2. Weight. If possible, take similar sized pieces of the two and note any difference in weight .

3. Texture. Are they smooth or rough to the touch?

4. Smell or odor. Check out any unique smell.

5. Solubility. Dissolve a bit of each in water and see how soluble each is.

6. Melting point. Carefully heat a piece of it and see if they will melt, and if so at what temperature.

7. Pliability. Can any of them bend, are they flexible?

8. Magnetism. Can the be attracted by a magnet?

9. Bouyancy . Can they float on water?

10. Electrical conductivity. using a battery and small torch bulb, find out if they can conduct an electric current.

These 10 physical tests can help differentiate between the two materials. There are still many more that can be safely carried out.

Final answer:

To determine whether two solid substances are the same, measure their mass and volume, and perform additional tests if needed.

Explanation:

When trying to determine whether two solid substances are the same, there are several measurements and tests you can perform. Firstly, you can measure the mass of both substances using a balance. Secondly, you can measure the volume of both substances using a graduated cylinder or other measuring tools.

In addition to this, If the mass and volume are the same for both substances, it is likely they are the same. However, to confirm this, you can perform additional tests such as melting point determination or spectroscopy to analyze the chemical properties of the substances.