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3 years ago

1. True or False: Fungi are reproduced through the spread of spores. O True O False

Chemistry

1 answer:

dsp733 years ago

3 0

Answer:

True

Explanation:

Fungi reproduce by spawning absurd amount of spores greatly increasing the survival rate of the fungi.

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Se combustionan 2 g de magnesio en Aire, obteniéndose 3,28 g de óxido de magnesio (MgO)¿Qué masa de oxígeno se consumen en la re

konstantin123 [22]

Answer:

1.30 g

Explanation:

La reacción que toma lugar es:

2Mg + O₂ → 2MgO

Primero convertimos 3.28 g de MgO en moles, usando su masa molar:

3.28 g ÷ 40.3 g/mol = 0.081 mol MgO

Después convertimos 0.081 moles de MgO en moles de O₂, usando los coeficientes estequiométricos:

0.081 mol MgO * $\frac{1molO_2}{2molMgO}$ = 0.0407 mol O₂

Finalmente convertimos 0.0407 moles de O₂ en gramos:

0.0407 mol O₂ * 32 g/mol = 1.30 g

5 0

3 years ago

A buffer solution contains 0.240 M ammonium chloride and 0.499 M ammonia. If 0.0565 moles of perchloric acid are added to 250 mL

snow_lady [41]

Answer:

The pH of the resulting solution is 9.02.

Explanation:

The initial pH of the buffer solution can be found using the Henderson-Hasselbalch equation:

$pOH = pKb + log(\frac{[NH_{4}Cl]}{[NH_{3}]})$

$pOH = -log(1.78\cdot 10^{-5}) + log(\frac{0.240}{0.499}) = 4.43$

$pH = 14 - pOH = 14 - 4.43 = 9.57$

Now, the perchloric acid added will react with ammonia:

$n_{NH_{3}} = 0.499moles/L*0.250 L - 0.0565 moles = 0.0683 moles$

Also, the moles of ammonium chloride will increase in the same quantity according to the following reaction:

NH₃ + H₃O⁺ ⇄ NH₄⁺ + H₂O

$n_{NH_{4}Cl} = 0.240 moles/L*0.250L + 0.0565 moles = 0.1165 moles$

Finally, we can calculate the pH of the resulting solution:

$pOH = pKb + log(\frac{[NH_{4}Cl]}{[NH_{3}]})$

$pOH = -log(1.78\cdot 10^{-5}) + log(\frac{0.1165 moles/0.250 L}{0.0683 moles/0.250 L}) = 4.98$

$pH = 14 - 4.98 = 9.02$

Therefore, the pH of the resulting solution is 9.02.

I hope it helps you!

5 0

3 years ago

xenn [34]

The answer is OH.

Hope this helps!

4 0

3 years ago

How do all stars form ?

professor190 [17]

Answer:

starts form from a accumulation of gas and dust ,which collapses due to gravity and starts to form stars

6 0

3 years ago

How do I solve this? please help and only respond with the answer/work. I will mark BRAINLIEST

Ulleksa [173]

Answer: I think the answer is 2.5 M.

Explanation: Formula: M = n/v

M= 10 mol / 4L

M= 2.5 M

4 0

3 years ago