3 years ago

The element with the chemical symbol ______ is a nonmetal help me please

Chemistry

2 answers:

katrin [286]3 years ago

6 0

O is in red which say nonmetal

marysya [2.9K]3 years ago

5 0

Answer:

Explanation:

O is in the red which says nonmetal

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A flash contains 85.6g of C7H5NO3S (Saccharine) in 2.00 litre of a solution. What is the molarity?

larisa86 [58]

Answer:

0.234 M

Explanation:

C- 12.009 x 7

H- 1.001 x 5

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S- 32.059

___________+

183.133 g/mol

$\frac{1mol}{183.133g} *\frac{85.6g}{2.00L}$ = 0.234 M Cancel out the grams mol/L equals molarity. Lowest significant figure is 3

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Estradiol is a female sexual hormone that causes maturation and maintenance of the female reproductive system. Elemental analysi

Ipatiy [6.2K]

Answer:

The molecular formula of estradiol is: $C_{18}H_{24}O_2$ .

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Let the molecular formula of estradiol be $C_xH_yO_z$

Percentage of an element in a compound:

$\frac{\text{Number of atoms of element}\times \text{Atomic mass of element}}{\text{molecular mass of element}}\times 100$

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$\frac{x\times 12 g/mol}{272.37 g/mol}\times 100=79.37\%$

x = 18.0

Percentage of hydrogen in estradiol :

$\frac{y\times 1g/mol}{272.37 g/mol}\times 100=8.88\%$

y = 24.2 ≈ 24

Percentage of oxygen in estradiol :

$\frac{z\times 16 g/mol}{272.37 g/mol}\times 100=11.75\%$

z = 2

The molecular formula of estradiol is: $C_xH_yO_z:C_{18}H_{24}O_2$

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Joshua hooks a rubber band between his thumb and forefinger. He moves his fingers apart, stretching the rubber band. With a quic

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<span>The elastic potential energy stored in the stretched rubber band changes to kinetic energy.</span>

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4 years ago

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Answer:

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3 years ago