Which of the following is a nonmetal?
A.
potassium (K)
B.
aluminum (Al)
C.
calcium (Ca)
D.
chlorine (Cl)

Answers

Answer 1
D. chlorine (Cl)

Chlorine is a nonmetal. Chlorine is a halogen in family VIIA, which is on the right side of the metalloids on the periodic table.

Related Questions

(113) Fe, Co, and Ni are in a category of metals best known as
(A) Transition metals
(B) Alkali metals
(C) Rare metals
(D)Main group metals
(

Answers

Answer:

A

Explanation:

iron, cobalt and nickel are all transition metals

What is the percent of oxygen by mass in C2H402

Answers

Answer:

53.3 %.

Explanation: C2H4O2. = 2 * 12.011 + 4 * 1.008 + 2 * 15.999. = 60.052.

What is the chemical name
for ca2 and clo3-

Answers

Answer:

Calcium chlorate | Ca(ClO3)2 - PubChem.

Explanation:

Which of the following mainly drives surface runoff?
A. magnetism
B. gravity
C. electricity
D. thermal energy​

Answers

I think its D. I hope this helped
The answer is Either C or D. Sorry if I’m wrong!

In the reaction between 15.8 g of NH3 and 22.7 g oxygen, water and nitrogen monoxide are
produced. Determine which reactant is limiting and calculate the number of grams of each
product.

Answers

Explanation:

limiting is NH3

NO:27/88g

H2O: 25/09g

Why is the electron configuration for copper 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 10 4 s 1 instead


of 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 9 4 s 2 ?  

A The 4 s orbital has higher energy than the 3 d orbital.


B Electrons occupy orbitals of the highest energy levels first.

C A filled sublevel is more stable than a half-filled sublevel.

Answers

The answe is B, because electrons occupy orbitals of high energy levels first

A chemistry assignment has a student conduct a single replacement reaction by adding 7.5g of sodium metal to 20.0g of aluminum chloride. How much aluminum in moles would precipitate out as a result of the reaction

Answers

Answer: 0.109 mol

Explanation:

Balanced chemical equation:

3 Na(s) + AlCl3(aq) --> 3 NaCl(aq) + Al(s)

3 moles of sodium metal react with 1 mole of aluminum chloride to produce 3 moles of aluminum chloride and 1 mole of solid aluminum

Molar mass of Na = 22.99 g/mol

Mass(Na) = 7.5 g

Find number of moles of Na:

n = mass of Na/molar mass of Na

=(7.5 g)/(22.99 g/mol)

= 0.3262 mol

Molar mass of AlCl3,

MM = 1*MM(Al) + 3*MM(Cl)

= 1*26.98 + 3*35.45

= 133.33 g/mol

Mass(AlCl3) = 20.0 g

Find number of moles of AlCl3,

n = mass of AlCl3/molar mass of AlCl3

=(20 g)/(1.333*10^2 g/mol)

= 0.15 mol

Balanced chemical equation is:

3 Na + AlCl3 ---> Al + 3 NaCl

3 mol of Na reacts with 1 mol of AlCl3

for 0.3262 mol of Na, 0.1087 mol of AlCl3 is required

But we have 0.15 mol of AlCl3

So, Na is the limiting reagent and we will use it in our further calculations.

According to balanced equation:

mol of Al formed = (1/3) * moles of Na

= (1/3)*0.3262

= 0.1087 mol

Answer: 0.109 mol of aluminum will precipitate out as a result of the reaction

Arrange the following acids from strongest to weakest:



HF, HBr, HCl, HI

Answers

Answer:

HI>HBr>HCL>HF

Explanation:

A sample of excited atoms lie 3.314×10−19 J above the ground state. Determine the emission wavelength of these atoms.

Answers

The emission wavelength of the atoms excited above the ground state is 599.8 nm.

Emission wavelength of the atoms

The emission wavelength of the atom is determined by using the following formulas as shown below;

E = hf

E = hc/λ

where;

E is the energy of the atomh is Planck's constantc is speed of lightλ is the emission wavelength

λ = hc/E

λ = (6.626 x 10⁻³⁴ x 3 x 10⁸) / (3.314 x 10⁻¹⁹)

λ = 5.998 x 10⁻⁷ m

λ = 599.8 x 10⁻⁹ m

λ = 599.8 nm

Thus, the emission wavelength of the atoms is 599.8 nm.

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A solution consists of 35.00 g of CuSO4 dissolved in 250.0 mL of water. The molar mass of Cu is 63.55 g/mol the molar mass of S is 32.07 g/mol, and the molar mass of O is 16.00 g/mol. What is the molarity of the solution?

Answers

Answer:

0.87708moldm-3

Explanation:

[tex]molar \: mass \: of \: cuso4 = 63.55 + 32.07 + 4(16.00) \\ =159.62gmol {}^{ - 1} \\ mole(n) = \frac{mass}{molar \: mass } \\ n = \frac{35}{159.62} \\ n = 0.21927mol \\ molarity = \frac{n}{v} \\ molarity = \frac{0.21927}{0.25} \\ molarity = 0.87708moldm {}^{ - 3} [/tex]

When heated, KClO3 decomposes into KCl and O2. 2KClO3⟶2KCl+3O2 If this reaction produced 17.4 g KCl, how many grams of O2 were produced? maSS

Answers

Answer:

12.6 g O2 or

12.60 g O2 (if needed two decimal places)

Explanation:

First convert grams into moles:

17.4 g KCl × 1

74.55

= 0.233 moles of KCl

Next solve for the mole of O2:

= 0.233 × 3 moles of O2

2 moles of KCl

= 0.3495 or

= 0.350 moles of O2

Finally convert the mole to grams:

= 0.350 moles of O2 × 36g

1 mole

= 12.6 g O2 or 12.60 g O2

Answer:

a car traveled 20m &400k/g

A 23.6 g sample of NagPO4 (molar mass 163.94 g/mol) is dissolved in enough water to produce
g
750. mL of solution.
Calculate the concentration of Nations in solution.

Answers

Taking into account the definition of molarity,  the concentration of Na₃PO₄ in solution is 0.192[tex]\frac{moles}{lliter}[/tex].

Definition of molarity

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

[tex]Molarity=\frac{number of moles}{volume}[/tex]

Molarity is expressed in units [tex]\frac{moles}{lliter}[/tex].

Concentration of Na₃PO₄ in solution

Being the molar mass of Na₃PO₄ 163.94 g/mole, that is, the amount of mass that a substance contains in one mole, the amount of moles that contains 23.6 g sample of Na₃PO₄ is calculated as:

[tex]23.6 gramsx\frac{1 mole}{163.94 grams} = 0.144 moles[/tex]

Then you know:

number of moles= 0.144 molesvolume= 750 mL= 0.750 L (being 1000 mL= 1 L)

Replacing in the definition of molarity:

[tex]Molarity=\frac{0.144 moles}{0.750 L}[/tex]

Solving:

Molarity= 0.192[tex]\frac{moles}{lliter}[/tex]

Finally, the concentration of Na₃PO₄ in solution is 0.192[tex]\frac{moles}{lliter}[/tex].

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molarity:

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How to do Lewis structure for Al?

Answers

Notes:-

Al has Z=15

electron configuration:-

[Ne]3s²3p³

Valency is 3

So 3 dots are included

Write and balance tin and copper(ii) oxide react to form copper and tin IV oxide

Answers

Answer:

tin Is more reactive than copper so it reduces oxygen from copper

Gives 2 reaction in which benzene ring is retained and 2 reaction in which benzene ring is not retained

Answers

Hey dear,

Benzene is a 6-C cyclic structure with alternate double bonds.

● Reactions -

1) Benzene to cyclohexane -

Benzene can be reduced to cyclohexane with

the help of Ni/H2. C6H6 + 3H2 --> C6H12

All 3 double bonds in ring are reduced here.

2) Benzene to benzoquinone - Benzene can be oxidized to benzoquinone with

the help of acidic K2Cr207. C6H6 +3[O] --> C6H4O2 + H2O

Only 1 double bond is lost in this reaction.

Hope this helps you.

Volume of distillate = 300 ml
Volume of Ethanol in the mixture = 450 ml
% Recovery =

Answers

Based on the distillation data provided, the percent recovery of ethanol is 66.7%

What is distillation?

Distillation is a separation technique which is used to separate two miscible liquids based on differences in their boiling points.

At the boiling point of the first liquid, it distills over and is obtained by condensation.

The liquid obtained is known as distillate.

In the distillation of ethanol, the percent recovery is calculated as follows:

Percent recovery = (volume of distillate/volume of ethanol in mixture) × 100%

From the data given:

Volume of distillate = 300 mlVolume of Ethanol in the mixture = 450 ml

Percent Recovery = (300/450) × 100%

Percent recovery = 66.7%

Therefore, the percent recovery of ethanol is 66.7%.

Learn more about about distillation at: https://brainly.com/question/24553469

Which bond links amino acids together?


glycosidic bond


hydrogen bond


phosphodiester bond


peptide bond

Answers

Answer:

Peptide Bonds

Explanation:

Peptide bonds are formed by a biochemical reaction that extracts a water molecule as it joins the amino group of one amino acid to the carboxyl group of a neighboring amino acid.

What type of energy transformation takes place during cellular respiration?

Use complete sentences to explain how energy is conserved during cellular respiration. (10 points)

Answers

Answer:

chemical energy transgormation takes place during cellular respiration

Which statement is true about precipitation in biomes around the world.

Question 6 options:

The taiga has more precipitation than the deciduous forest biome.


Deciduous forest biome is second in precipitation to the tropical rainforests.


Coniferous forest biome has more precipitation to the Deciduous forest biome.


The desert biome has more precipitation to the Deciduous forest biome.

Answers

Answer:

i want to say it's

Explanation:

(B) but i don't know but did you ever figure out the anwser?

Answer:

Coniferous forest biome has more precipitation to the Deciduous forest biome.

Explanation:

please help and show work will be picking brainliest

Answers

Answer:

34x4v

Explanation:

ik it is write

PLEASE HELP!!!!!!!
You compare the gas generated from a reaction using two antacid tablets with the gas generated from a reaction using four antacid tablets (consider the antacid as the limiting reagent).

At constant pressure and temperature, how do the volumes of the gases compare?


The two reactions produce the same amount of gas.


The gas generated by four antacid tablets has a smaller volume.


The gas generated by two antacid tablets has a smaller volume.

Answers

Answer: The gas generated by two antacid tablets has a smaller volume.

Explanation:

Since the antiacid is the limiting reagent, we know that the more tablets there are, the more gas there will be.

This means that there will be more gas generated by the four antiacid tablets when compared to the two antiacid tablets, which gives us that the gas generated by the two antiacid tablets has a smaller volume.

You open the refrigerator and take out a slice of leftover pizza. You put it in the microwave oven, turn it on, and watch for the cheese to start bubbling. You take a bite of the pizza and realize it is too hot, so you let it sit on the counter for a minute. When the pizza is finally cool enough to eat, you enjoy your lunch. Identify three examples of energy transfer in the scenario.
Pick up to 3 answers.
A. Electromagnetic (microwave) energy is transferred from the refrigerator to the pizza in the refrigerator.
B. Electromagnetic (microwave) energy is transferred from the microwave to the pizza in the microwave oven.
C. Heat energy is transferred from the pizza to the room as the pizza cools on the counter.
D. Heat energy from the warm pizza is transferred from the pizza into the mouth chewing it.
E. Heat energy from the room is transferred into the pizza as it comes out of the microwave oven.

Answers

Answer:

C,B,(D or A)

Explanation:

why are hydrocarbons insoluble in water

Answers

Answer:

Hydrocarbons are insoluble in water because they are non-polar compounds while water is a polar solvent. By principle, like dissolves like. Nonpolar solvents dissolve nonpolar solutes and polar solvents dissolve polar solutes.

Explanation:

please brainliest me

hope it helps

Hydrocarbons are insoluble in water because :-

1)Hydrocarbons are nonpolar whereas water is polar. (like dissolves like).

2) Hydrocarbons and water do not exhibit appropriate solvent-solute interactions. Hydrocarbons only form very weak dispersion forces whereas water produces strong polar hydrogen bonding interactions.

Explanation:

Hope it helps you!!

Question 13 options:
A) What is the volume (L) of 2.5 moles of oxygen at STP?


B) What is the volume (L) of 2.5 moles of nitrogen at STP?

Answers

At STP

one mol of oxygen weighs=22.4L

No of moles=2.5mol

Total volume:-

2.5(22.4)56L

What are the characteristics of nonvascular plants? (select all that apply) A . They don’t rely on roots to receive water.
B .They have xylem vessels and phloem vessels
C . They are able to push water and nutrients to each part of the plant.
D . They are found in moist environments.

Answers

Answer:

D . They are found in moist environments.

Explanation:

Nonvascular plants do not have a xylem or phloem, roots, stems, or leaves. Because these plants lack water-conducting tissues, they fail to achieve the structural complexity and size of most vascular plants and have evolved in habitats which allow their survival and reproduction.

The plant body that is most obvious in non-vascular plants are the the gametophyte generation. The gametophte gemeration is haploid.

The non-vascular plants grow in moist environments. It is due to lack of vascular tissue that requires to maintain close contact with water to prevent desiccation. Nonvascular plants are plants that do not have any special internal pipelines or channels to carry water and nutrients. Instead, nonvascular plants absorb water and minerals directly through their leaflike scales. Nonvascular plants are usually found growing close to the ground in damp, moist places. Non-vascular plants thrive in damp conditions since they don't need to rely on roots to acquire enough water.


If a metal reacts violently with water, in which group is it likely to be found?

Answers

Answer:

Alkali metals (Li, Na, K, Rb, Cs, and Fr)

Explanation:

Answer:

Group 1

Explanation:

Alkali metals such as (Lithium, Sodium, Rubidium, Francium, Cesium, etc.) react violently with waterThey are termed "alkali" due to their nature of forming hydroxides on reacting with water

Calculate the pOH for a solution that has a hydroxide ion, (OH-) concentration of 5.02 X 10-4 M.

Calculate the pH.

Note: the answers should have three significant figures

Answers

Answer:

Explanation:

Calculate the pOH for a solution that has a hydroxide ion, (OH-) concentration of 5.02 X 10-4 M.

Calculate the pH.

Note: the answers should have three significant figures

When a sodium atom becomes an ion, the size of the atom
A
decreases by losing an electron,
B
decreases by gaining an electron,
с
increases by losing an electron,
D
increases by gaining an electron,

Answers

decreases by losing an electron

Sodium has an electron configuration of 2-8-1. Since sodium is a metal, it loses that one electron and becomes a positive ion. Since it is losing an electron, it is decreasing in size.

what is safe storage of produced materials exlain long ​

Answers

Answer:

Stacking storage sacks/ bags by interlocking, and placing heavier object on lower shelves.

Explanation:

Not sure what you meant exactly, but this is my best guess.

balancing equation plsss help

Answers

Answer:

The formula is :  C3H8 + 5O2 → 3CO2 + 4H2O.

Explanation:

good luck

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