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3 years ago

Please i’m like a month behind

Chemistry

1 answer:

Alex17521 [72]3 years ago

4 0

Answer:

the gets rid of waste is decomposer

and organism for is made up of more then one cell

sorry hope it helped you so far and they give you examples

Explanation:

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Nitrogen forms more oxides than any other element. The percents by mass of in three different nitrogen oxides are (1) (II) and (

Tema [17]

Complete question;

Nitrogen forms more oxides than any other element. The percents by mass of N in three different nitrogen oxides are (|) 46.69%;(II) 36.85 %; (III) 25.94%. For each compound, determine (a) the simplest whole-number ratio of N to O, and (b) the number of grams of oxygen per 1.00 g of nitrogen.

Answer:

a. (i) The ratio is 1:1 , the formula = NO (ii)The ratio is 1 : 1.5 which is 2 : 3, the formula = N₂O₃ (iii) The ratio is 1 : 2.5 which is 2:5 , the formula = N₂O₅

b. (i)number of grams of oxygen = 53.31/46.69 = 1.14 g

(ii)number of grams of oxygen = 63.15/36.8 = 1.71 g

(iii)number of grams of oxygen = 74.06/25.94 = 2.855 g

Explanation:

(i) The percentage by mass of the nitrogen in Nitrogen oxide (i) is 46.69% which is taken as 46.69 grams . Since the other element is oxygen the mass of oxygen will be 100 - 46.69 = 53.31 grams.

The relative atomic mass of Nitrogen and oxygen is 14 amu and 16 amu respectively.

Therefore, to know the whole number ratio of N and O we find the number of moles.

number of moles of N = 46.69/14 = 3.335

number of moles of O = 53.31/16 = 3.332

The ratio is 1:1 , the formula = NO

(ii)

number of moles of N = 36.85/14 = 2.632

number of moles of O = 63.15/16 = 3.947

The ratio is 1 : 1.5 which is 2 : 3, the formula = N₂O₃

(iii)

number of moles of N = 25.94/14 = 1.85

number of moles of O = 74.06/16 = 4.63

The ratio is 1 : 2.5 which is 2:5 , the formula = N₂O₅

(i) 46.69 g of nitrogen = 53.31 g of oxygen

1 g of nitrogen = ? of Oxygen

number of grams of oxygen = 53.31/46.69 = 1.14 g

(ii)

Using similar method in b(i)

number of grams of oxygen = 63.15/36.8 = 1.71 g

(iii)

Using similar method in b(i)

number of grams of oxygen = 74.06/25.94 = 2.855 g

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3 years ago

Which of these factors are experienced by a space shuttle in orbit? Check all that apply.

Minchanka [31]

A. gravity (of any planet/star/celestial body around )

D. Inertia

E. Centripetal force

5 0

3 years ago

Read 2 more answers

1. The Yerkes-Dodson Law says

goblinko [34]

Answer:

The Yerkes-Dodson Law suggests that there is a relationship between performance and arousal. Increased arousal can help improve performance, but only up to a certain point.

Explanation:

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3 years ago

Calculate the pH of a buffer solution created by reacting 100 mL of 0.1 M NH3 with 90 mL of 0.1 M HNO3. (Remember, you can find

algol13

This question is asking for the pH of a buffer solution between ammonia and nitric acid, with given volumes and concentrations. At the end, the result turns out to be 10.488.

<h3>Buffers</h3>

In chemistry, buffers are known as substances attempting to hold a relatively constant pH by mixing and acid and a base (weak and strong). In such a way, for the substances given, the first step will be to calculate the consumed moles as they are mixed:

$n_{NH_3}=0.1L*0.1mol/L=0.01mol\\\\n_{HNO_3}=0.09L*0.1mol/L=0.009mol$

Now, since ammonia is in a greater proportion, one can calculate how much of it is left after being consumed by the nitric acid:

$n_{NH_3}^{left}=0.01mol-0.009mol=0.001mol$

And its new concentration:

$[NH_3]=\frac{0.001mol}{0.1L+0.09L} =0.00526M$

Next, with ammonia's ionization:

$NH_3+H_2O\rightleftharpoons NH_4^++OH^-$

We set up the equilibrium expression based on ammonia's Kb:

$Kb=\frac{[NH_4^+][OH^-]}{[NH_3]}$

Which can be solved by introducing x and using ammonia's Kb:

$1.8x10^{-5}=\frac{x^2}{0.00526M}\\ \\$

Then, we solve for x which is also equal to the concentration of ammonium and hydroxide ions in the solution:

$x=\sqrt{0.00526*1.8x10^{-5}}=0.000308M$

Ultimately, we calculate the pOH and then turn it into pH with:

$pOH=-log(0.00308)=3.512\\\\pH=14-3.512=10.488$

Learn more about buffers: brainly.com/question/24188850

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2 years ago

What type of compound is B4F10, and what is its name?

Gemiola [76]

A binary compound is a compound formed from two different elements. There may or may not be more than one of each element. A diatomic compound (or diatomic molecule) contains two atoms, which may or may not be the same.

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Nomenclature of Ionic and Covalent Compounds.

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2 years ago