A substance is tested and is found to have the following physical properties: high electrical conductivity malleability high luster The substance is most likely a _____.

Answers

Answer 1

Answer: The substance is likely to be a metal. Many metals, such as gold, are extremely malleable (meaning that they can be pounded into thin sheets), have high conductivity due to free electrons, and are very shiny (high luster).

Answer 2

Answer:

Metal is most likely to be correct

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The total number of sodium atoms in 46.0 grams of solution is?

Answers

First step, is to find the Molar Mass.
If you go to the periodic table, the Molar Mass of the Sodium Na is 23g/mol

Second Step, you convert from grams to moles.
number of Mole = mass of sodium / molar mass = $(46)/(23) = 2 mol$

Third Step, you find the number of atoms.
As We know, Avogadro said that the number of atoms in 1 mole is about $6.022 * 10^(23)$ .
You use the Rule of three and you find the number of atoms!
1 mole = $6.022 * 10^(23)$ atoms
2 mole = x atomes
x = 2 * ( $6.022 * 10^(23)$ )
x= $12.044 * 10^(23)$ atomes

So, there is $12.044 * 10^(23)$ atoms of Sodium Na in 46g of Solution.

Hope this Helps! :D

molar mass Na = 23g/mol
46g = 456/2 = 2mol
1mol = 6.022*10^23 atoms
2mol = 2*6.022*10623
= 1.204*10^24 atoms

The range in size of most atomic radii is approximately _____.5 × 10−11 m to 2 × 10−10 m
2 to 5 nm
5 × 10−21 m to 2 × 10−20 m
2 to 5 cm

Answers

The atomic radii is approximately between 5 × 10−11 m to 2 × 10−10 m

The range in size of most atomic radii is approximately 5 × 10−21 m to 2 × 10−20 m. The rest of the choices do not answer the question above.

There are many different ways to classify matter, but one way is to use only two categories for all matter. All matter can be classified as eithera. liquids or gases.
b. atoms or molecules.
c. elements or compounds.
d. mixtures or substances.

Answers

I would put down C. elements or compounds

Answer:C

Explanation:cause I just took the test and I can confirm

What is the correct formula for magnesium sulfate

Answers

MAGNESIUM SULFATE is a small colorless crystal used as an anticonvulsant, a cathartic, and an electrolyte replenisher in the treatment of pre-eclampsia and eclampsia. It causes direct inhibition of action potentials in myometrial muscle cells. Excitation and contraction are uncoupled, which decreases the frequency and force of contractions. (From AMA Drug Evaluations Annual, 1992, p1083).MgSO4

i guess the answer is MgO4S

What kind of bond is in the picture

Answers

Answer:

Ionic Bond

Explanation:

Ionic bonding occurs when there is a significant difference in electronegativity between atoms, resulting in the transfer of electrons. In the case of magnesium (Mg) and oxygen (O), magnesium, with a lower electronegativity, donates two electrons to oxygen, which has a higher electronegativity. This leads to the formation of Mg²⁺ cations and O²⁻ anions. The resulting electrostatic attraction between these oppositely charged ions forms an ionic bond, resulting in the creation of magnesium oxide (MgO), a compound with a crystal lattice structure.

A piece of iron (Cp = 0.450 J/(gi°C)) that has a mass of 21.5 g and an initial temperature of 100.0°C is submerged in X g of water (Cp = 4.184 J/(gi°C)) at 20.0°C. The temperature of the system (iron and water) changes to 21.4°C. What is the value of X? A. 041 g. B. 80 g. C. 132 g. D. 574 g

Answers

The problem ask to calculate the value of x if an iron taht has a mass of 21.5g and has an initial temperature of 1000.0C is submerge in Xg of a water at 20C. So the value of X is letter C. 132 g. I hope you are satisfied with my answer and feel free to ask for more

Answer:

D) yes, because (StartFraction b Over a + c EndFraction)(a + c) = b

Explanation:

just did it on edge 2020

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