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2 years ago

¿Cuáles son ejemplos de elementos químicos que pertenecen al grupo de los gases nobles o gases raros?

Chemistry

1 answer:

Aliun [14]2 years ago

5 0

Answer:

traducir al español esa es la respuesta

自分の仕事をする

Explanation:

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A patients blood is tested for growth hormone which has a molecular mass of 848.952g/mol. The test results show a normal concent

rusak2 [61]

Answer:

$\boxed{4.7\times 10^{-9}}$

Explanation:

Data:

MM = 848.952 g/mol

c = 4.0 x 10⁻⁶ g/L

V = 1 L

Calculations:

(a) Mass of growth hormone

$\text{Mass} = \text{1 L} \times \dfrac{4.0 \times 10^{-6} \text{ g}}{\text{1 L}} = 4.0 \times 10^{-6} \text{ g}$

(b) Moles of growth hormone

$\text{Moles} = 4.0 \times 10^{-6} \text{ g} \times \dfrac{\text{1 mol}}{\text{848.952 g}} = 4.7\times 10^{-9}\text{ mol}\\\\\text{There are $\boxed{\mathbf{4.7\times 10^{-9}}\textbf{ mol}}$ of growth hormone in 1 L of blood.}$

8 0

3 years ago

Which type of chemical reaction does this word equation exemplify: iron metal plus copper (II) sulfate solution yields iron (II)

yan [13]

Answer:

Synthesis

Explanation:

3 0

3 years ago

Read 2 more answers

What substance is acting as the Brønsted-Lowry base in the forward reaction below?

asambeis [7]

The question is asking to state the substance that is acting as the Bronsted Lowry base in the forward reaction, base on my research, I would say that the substance acting to said formulas is the NH3. I hope you are satisfied with my answer and feel free to ask for more if you have question and further clarification

3 0

2 years ago

What mass of iron is found in 280 g of 2 ppm solution?

Nataly_w [17]

Answer: The mass of iron found in the solution is 0.56 mg

Explanation:

ppm is the amount of solute (in milligrams) present in kilogram of a solvent. It is also known as parts-per million.

To calculate the ppm of oxygen in sea water, we use the equation:

$\text{ppm}=\frac{\text{Mass of solute}}{\text{Mass of solution}}\times 10^6$

Both the masses are in grams.

We are given:

Concentration of iron = 2 ppm

Mass of solution = 280 g

Putting values in above equation, we get:

$2=\frac{\text{Mass of iron}}{280g}\times 10^6\\\\\text{Mass of iron}=\frac{2\times 280}{10^6}=0.00056g=0.56mg$

Conversion factor used: 1 g = 1000 mg

Hence, the mass of iron found in the solution is 0.56 mg

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3 years ago

why does a large lake filled with cool water have more thermal energy than a small pond filled with warmer water

yan [13]

Because the scale is much larger, and a larger pool can collect more energy than a small pool, and it is more likely that it would have more energy spread throughout it.

8 0

3 years ago