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ValentinkaMS [17]
3 years ago
7

What has mass and takes up space? A. matter B. weight C. volume D. space

Chemistry
2 answers:
spayn [35]3 years ago
7 0

Answer:

Matter is anything that has mass and takes up space.

<h3><u>PLEASE</u><u> MARK</u><u> ME</u><u> BRAINLIEST</u></h3>
OLEGan [10]3 years ago
4 0
Answer: A. Matter

Explanation: anything that has matter has a definite shape and volume.
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Determine the percentage of carbon and hydrogen in ethane C2H6 if the molecular weight is 30.
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Answer:

Percentage of carbon:

{ \tt{ =  \frac{24}{30}  \times 100\%}} \\  = 80\%

Percentage of hydrogen:

{ \tt{ =  \frac{6}{30}  \times 100\%} } \\  = 20\%

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What is the best way to measure the age of the Earth and why? Explain how scientists do this.
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3 years ago
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A physical change _____ change the composition or identity of the substance. will will not 2. An example of a physical change is
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not sure

Explanation:

a physical change (can)change.,....

6 0
4 years ago
Un anillo, de masa 90 gramos, contiene 59,1% de oro. ¿Cuál es el valor del anillo si cada mol de oro vale S/.1800?. Considere el
LekaFEV [45]

Answer:

S/.486 es el valor del anillo

Explanation:

Para hallar el precio del anillo se deben encontrar las moles de oro que contiene este.

Si el anillo es de 90g y solo el 59.1% contiene oro, la cantidad de oro en gramos es:

90g × 59.1% = 53.19g Oro en el anillo

Ahora, para convertir los gramos de oro a moles se debe usar la masa atómica del oro (197g/mol), así:

53.19g × (1mol / 197g) = <em><u>0.27 moles de oro contiene el anillo</u></em>.

Ya que cada mol de oro cuesta S/.1800, 0.27 moles de oro (Y por lo tanto, el anillo) costarán:

0.27mol × (S/.1800 / 1mol oro) =

<h3>S/.486 es el valor del anillo</h3>
8 0
3 years ago
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