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Ad libitum [116K]

3 years ago

10

What is orbit? A. An increase in centripetal motion and mass friction. B. Resistance of an object to avoid friction. C. Gravity

causing a curved path as an object tries to go straight. D. How well an object floats.

1 answer:

AveGali [126]3 years ago

8 0

Answer:

C. gravity causing a curved path as an object tries to go straight.

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When copper is heated with an excess of sulfur, copper(l) sulfide is

Aloiza [94]

Answer:

72.4%

Explanation:

Step 1: Write the balanced equation

2 Cu + S ⇒ Cu₂S

Step 2: Calculate the theoretical yield, in moles, from 0.0970 moles of Cu

The molar ratio of Cu to Cu₂S is 2:1.

0.0970 mol Cu × 1 mol Cu₂S/2 mol Cu = 0.0485 mol Cu₂S

Step 3, Convert the theoretical yield to mass

The molar mass of Cu₂S is 159.16 g/mol.

0.0485 mol × 159.16 g/mol = 7.72 g

Step 4: Calculate the percent yield

We will use the following expression.

%yield = experimental yield/theoretical yield × 100%

%yield = 5.59 g/7.72 g × 100% = 72.4%

8 0

3 years ago

Name an ionic compound or a covalent compound, explain why it is ionic or covalent

stellarik [79]

Answer:

IOnic compound is NAcL cuz in the periodic table eft are metal and right are non metal makes it ionic (different)

Explanation:

7 0

3 years ago

Draw a lewis structure for ketene, c2h2o, which has a carbon–carbon double bond

MrMuchimi

Visual representation of covalent bonding indicating the valence shell electrons in the molecule, lines represents the shared pair of electron and pair of electrons that are not involved in bonding are represented as dots(lone pairs) are known as Lewis structures.

Compound formation takes place in order to complete the octet of each element that is according to octet rule, each atom forms bond with other atom in order to complete their octet that is to get eight electrons in its valence shell and attain stability.

An organic compound of the form $R^{'}R^{''}C=C=O$ is known as ketene.

The given ketene is $C_2H_2O$ .

The number of valence electron of:

$C = 4$

$H = 1$

$O = 6$

The number of valence electrons in $C_2H_2O$ = $2\times 4+2\times 1+1\times 6 =16$

2 electrons are involved in each single bond between carbon and hydrogen and 4 electrons are involved in each double bond formed between carbon-carbon and carbon-oxygen. Hence, the total number of electrons involved in bond formation are 12 and rest 2 pair of electrons are present on oxygen as lone pair of electrons.

Therefore, the attached image is the Lewis structure of $C_2H_2O$ .

8 0

3 years ago

Glucose is the sole energy source, what fraction of the carbon dioxide exhaled by animals is generated by the reactions of the c

olganol [36]

2/3 is the fraction of the carbon dioxide exhaled by all of the animals that is generated by the reactions of the citric acid cycle, if the gluscose is the sole energy source. So if the glucose is the energy source the fraction of the carbon dioxide is 2/3. The answer in this question is 2/3

3 0

3 years ago

What is true of an acidic solution at room temperature? it is slippery to the touch. it has a bitter taste. it has a ph value be

I am Lyosha [343]

Answer 1 and 2 are true for alkaline solutions.

Acids have a pH below 7. (this is the answer)

Both acids and bases are electrolytes as they have free moving ions.

Feel free to comment if you want further explanation.

8 0

4 years ago

Read 2 more answers