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Zarrin [17]
3 years ago
7

Plants absorb ______ from the atmosphere and release _______ to the atmosphere.

Chemistry
1 answer:
astra-53 [7]3 years ago
6 0
  1. {CO}_{2}
  2. {O}_{2}

HOPE IT HELPS

PLEASE MARK ME BRAINLIEST ☺️

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a sample of ammonia contains 9g hydrogen and 42g nitrogen. another sample contains 5g hydrogen .calculate the amount of nitrogen
balandron [24]
9 g of hydrogen - 42 g of nitrogen
5 g of hydrogen - x g of nitrogen

9x=42 \cdot 5 \\
9x=210 \\
x \approx 23.33

The mass of nitrogen in the second sample is 23.33 g.
4 0
3 years ago
A 200.0 mL solution of 0.40 M ammonium chloride was titrated with 0.80 M sodium hydroxide. What was the pH of the solution after
choli [55]

Answer:

9.25

Explanation:

Let first find the moles of NH_4Cl and NaOH

number of moles of NH_4Cl = 0.40  mol/L × 200 ×  10⁻³L

= 0.08 mole

number of moles of NaOH = 0.80  mol/L × 50 ×  10⁻³L

= 0.04 mole

The equation for the reaction is expressed as:

NH^+_{4(aq)} \ + OH^-_{(aq)} ------> NH_{3(g)} \ + H_2O_{(l)}

The ICE Table is shown below as follows:

                            NH^+_{4(aq)} \ + OH^-_{(aq)} ------> NH_{3(g)} \ + H_2O_{(l)}

Initial (M)              0.08            0.04                            0

Change (M)         - 0.04          -0.04                          + 0.04

Equilibrium (M)      0.04             0                                0.04

K_a*K_b = 10^{-14} \ at \ 25^0C

K_a = \frac{10^{-14}}{K_b}

K_a = \frac{10^{-14}}{1.76*10^{-5}}

K_a= 5.68*10^{10}

pK_a = - log \ (K_a)

pK_a = - log \ (5.68*10^{-10})

pK_a = 9.25

pH = pKa + \ log (\frac{HB}{HA} )   for buffer solutions

pH = pKa + \ log (\frac{moles \ of \ base }{ moles\ of \ acid} ) since they are in the same solution

pH = 9.25 + \ log (\frac{0.04 }{ 0.04} )

pH = 9.25

8 0
2 years ago
A 4.27 g sample of a lab solution contains 1.81g of acid. What is the concentration of the solution as a mass percentage?
vaieri [72.5K]

Answer:

42.38875878%

Explanation:

i divided 4.27 g from 1.81g using a percentage calculator but im not sure if its correct

5 0
2 years ago
How does charle's law relate to breathing?
tigry1 [53]

It affects the volume of air you can inhale.


5 0
2 years ago
Read 2 more answers
Which of the following are redox reactions? p4(s)+10hclo(aq)+6h2o(l)→4h3po4(aq)+10hcl(aq) br2(l)+2k(s)→2kbr(s) ch3ch2oh(l)+3o2(
Anit [1.1K]

The answer for above statement is:

p4(s)+10hclo(aq)+6h2o(l)→4h3po4(aq)+10hcl(aq) br2(l)+2k(s)→2kbr(s) ch3ch2oh(l)+3o2(g.

Explanation:

An reaction (redox) reaction may be a style of chemical process that involves a transfer of electrons between 2 species. An redox reaction any chemical process during which the oxidation state of a molecule, atom, or particle changes by gaining or losing an electron.

6 0
3 years ago
Read 2 more answers
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