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3 years ago

Part A

Chemistry

1 answer:

Mamont248 [21]3 years ago

3 0

Answer:

61.39%

Explanation:

The percent yield of a substance can be calculated using the formula:

Percent yield = actual yield/theoretical yield × 100%

Based on the information provided on the reaction in this question, the theoretical yield is given as 99.2g while the actual yield is given as 60.9g.

Hence, the percent yield is calculated thus:

% yield = 60.9/99.2 × 100

% yield = 0.6139 × 100

% yield = 61.39%

The percent yield is 61.39%

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If 3.75 moles of aluminum react, how many moles of sulfur are needed?

aliya0001 [1]

Answer:(A) 0.70 mol

Explanation:

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3 years ago

please help. 11) Tell how sexual reproduction and asexual reproduction are alike? How are they different?

jekas [21]

Answer:

They are alike because they both form offspring.

How they are different, sexual reproduction requires a mate, and it takes time and energy. For asexual reproduction, it does not take a mate and it takes very little time and no energy.

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3 years ago

Which statements describe surface waves? Check all that apply.

neonofarm [45]

Answer:

The correct answers are "They travel slower than P waves", "They result in much ground motion" and " They are produced by P and S waves".

Explanation:

A surface wave can travel through the existing interface between Earth and air, as well as between Earth and water. A clear example of this type of waves are Love and Rayleigh waves. They travel slower than primary waves, produce large movements in the ground and are produced by primary and secondary waves.

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3 years ago

What force was applied to an object if 35 j of work was done and the object moved 7 m?

Serjik [45]

5N force was applied to an object if 35 j of work was done and the object moved 7 m

A force is an effect that can alter an object motion according to physics and an object with mass can change its velocity or accelerate as a result force and also force is as push or pull and work done by the force on an object means assuming that direction of the force is parallel to the displacement of the object

Then the formula is

W = f × d

Where f is the magnitude of force and d is the displacement of the object

Then W = 35 J is the work done and

d = 7m is the displacement of the object

So rearrange the equation then

F = 35/7 = 5N

5N force was applied to an object if 35 j of work was done and the object moved 7 m

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2 years ago

URGENT!??! Please hurry ?!!!

Montano1993 [528]

Answer:

Table which was completed correctly is :

B) Answer choice G

Explanation:

Metals : Most of the elements in the periodic comes in the category of metal. They are found in left and middle of periodic table.

List of metals

Alkali : Li , Na , K ,Rb , Cs ,Fr

Alkaline : Be , Mg , Ca , Sr ,Ba ,Ra

Transition : Sc ,Ti ,V ,Cr ,Mn , Fe , Co, Ni Cu , Zn ,Y ,Zr ,Nb ,Mo ,Tc ,Ru , Rh , Pd , Ag , Cd , In , Sn, La ,Hf ,Ta ,W ,Re ,Os ,Ir ,Pt ,Au ,Hg

Non -Metals: Most of the p-block element are non metal. They are present in upper - right corner of the periodic table.

Non - metals : H , He , C ,N , O , F ,P ,S , Cl, Ar , Br , Xe ,At ,Rn,

Metalloid : They show properties of both the metals and the non - metals.

Also called as semimetals

Metalloid : B ,Si ,Ge ,As ,Sb ,Te ,Po

In table F :

B = metalloid , N = non metal ( wrong-match) , Ra = metal ( wrong-match) , He = Non - metal ( wrong-match)

In table G : Correctly matched

I = Non - metal , Ca = metal , Rb = metal , As = metalloid

In table H:

Ni = metal ( wrong-match) , C = metalloid ( wrong-match) , Mg = metal , Pb = Metal

In table J:

Cu = metal , Sb = Metalloid( wrong-match) , S = non metal( wrong-match) ,Ne = non metal

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3 years ago