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3 years ago

HELP NEEDED 20POINTS i have alot of questions of PATTERNS OF INHERITANCE

Chemistry

2 answers:

Nadya [2.5K]3 years ago

7 0

AAnswer:

1. 100%

2. Female carrier of a disease

3. 50%

4. A male carrier of the disease

5. A.

6. A.

7. D

Lina20 [59]3 years ago

5 0

1. 100%

2. Female carrier of a disease

3. 50%

4. A male carrier of the disease

5. A.

6. A.

7. D

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If a student's unknown is a colorless liquid and its boiling point was measured to be about 78°C

maks197457 [2]

It might be ethanol. :)

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2 years ago

The balanced equation for combustion in an acetylene torch is shown below: 2C2H2 + 5O2 → 4CO2 + 2H2O The acetylene tank contains

andriy [413]

Answer: 67.2 moles

Explanation: $2C_2H5+5O_2\rightarrow 4CO_2+2H_2O$

According to the given balanced equation, 2 moles of acetylene $C_2H_2$ combine with 5 moles of oxygen $O_2$ to produce 4 moles of carbon dioxide $CO_2$ .

Thus if 2 moles of acetylene $C_2H_2$ combine with = 5 moles of oxygen $O_2$

35 moles of acetylene $C_2H_2$ combine with= $\frac{5}{2}\times {35}=87.5$ moles of oxygen $O_2$

But as only 84 moles of oxygen are available, acetylene is not a limiting reagent.

5 moles of oxygen $O_2$ reacts with = 2 moles of acetylene $C_2H_2$

84 moles of oxygen $O_2$ reacts with= $\frac{2}{5}\times {84}=33.6$ moles of acetylene $C_2H_2$

Thus Oxygen is the limiting reagent as it limits the formation of products. Acetylene is excess reagent as it is present in excess.

2 moles of acetylene $C_2H_2$ produce= 4 moles of carbon dioxide $CO_2$ .

33.6 moles of acetylene $C_2H_2$ produce= $\frac{4}{2}\times {33.6}=67.2$ moles of of carbon dioxide $CO_2$ .

8 0

3 years ago

Read 2 more answers

An atom can be compared to our solar system because: WILL MAKE BRAINLIEST!

Sindrei [870]

Answer:

uh i think its D All of the above

Explanation:

sorry if its wrong

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2 years ago

Oxygen and hydrogen form the polyatomic hydroxide ion. What is its charge?

prohojiy [21]

Answer:

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the chage on hydroxide ions os negative

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2 years ago

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28 Which compound yields H + ions as the only positive ions in an aqueous solution?

MrMuchimi

Answer: (4) $CH_3COOH$

Explanation:-

According to Arrhenius concept, a base is defined as a substance which donates hydroxide ions $(OH^-)$ when dissolved in water and an acid is defined as a substance which donates hydronium ions $(H_3O^+)$ in water.