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3 years ago

The pictures are the answers

Chemistry

1 answer:

Mice21 [21]3 years ago

4 0

Answer:

Explanation:

If the students want to know at what percent of CO2 in the air the plant will grow at the fastest, then the percent of CO2 should be a different value for each plant in the table.

There are 2 tables that have different values for the CO2 - the tables in answer choices C and D.

Since the students only want to know how the amount of CO2 affects the plant, every other variable should remain constant.

The only answer choice that has a changing value for the percent of CO2 and a constant value for every other variable is C.

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Which of these substances is the least acidic? solution A, pOH = 1.5 solution B, pOH = 7.0 solution C, pOH = 13.5Which of these

Usimov [2.4K]

Answer: solution A, pOH =1.5

Explanation:

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3 years ago

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Calculate the molarity of 0.300 mol of Na2S in 1.75 L of solution.

Jobisdone [24]

First equation:
molarity=
no.of moles of solute (Na2S)/volume of solution
0.300/1.75 = 0.171
second equation:
same law
but in volume it is milliliter so you have to convert it by multiplying it with 10^-3
(10 power -3)

to understand it clearly
see this
http://imgur.com/xTS35QM

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3 years ago

The fuel used in many disposable lighters is liquid butane, C4H10. Butane has a molecular weight of 58.1 grams in one mole. How

BARSIC [14]

<h3>Answer:</h3>

6.21 × 10²² Carbon Atoms

<h3>Solution:</h3>

Data Given:

Mass of Butane (C₄H₁₀) = 1.50 g

M.Mass of Butane = 58.1 g.mol⁻¹

Step 1: Calculate Moles of Butane as,

Moles = Mass ÷ M.Mass

Putting values,

Moles = 1.50 g ÷ 58.1 g.mol⁻¹

Moles = 0.0258 mol

Step 2: Calculate number of Butane Molecules;

As 1 mole of any substance contains 6.022 × 10²³ particles (Avogadro's Number) then the relation for Moles and Number of Butane Molecules can be written as,

Moles = Number of C₄H₁₀ Molecules ÷ 6.022 × 10²³ Molecules.mol⁻¹

Solving for Number of Butane molecules,

Number of C₄H₁₀ Molecules = Moles × 6.022 × 10²³ Molecules.mol⁻¹

Putting value of moles,

Number of C₄H₁₀ Molecules = 0.0258 mol × 6.022 × 10²³ Molecules.mol⁻¹

Number of C₄H₁₀ Molecules = 1.55 × 10²² C₄H₁₀ Molecules

Step 3: Calculate Number of Carbon Atoms:

As,

1 Molecule of C₄H₁₀ contains = 4 Atoms of Carbon

So,

1.55 × 10²² C₄H₁₀ Molecules will contain = X Atoms of Carbon

Solving for X,

X = (1.55 × 10²² C₄H₁₀ Molecules × 4 Atoms of Carbon) ÷ 1 Molecule of C₄H₁₀

X = 6.21 × 10²² Atoms of Carbon

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3 years ago

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the bond angle marked a in the following molecule is about . question 24 options: a) 109.5 b) 180 c) 60 d) 120 e) 90

Sophie [7]

The bond angle marked as ‘a’ in the molecule above is about: D. 120 degrees. That means the angle between the atoms forms a trigonal planar shape.

<h3>What is the bond angle?</h3>

The bond angle is an angle between two bonds that measures in degrees and is calculated by using the spectroscopic method. The bond angle depends on the bonds and the number of lone pairs an atom has.

The molecule above contains 3 electron charge clouds around them: a single bond to carbon, a single bond to oxygen, and a double bond to the other oxygen. Hence, the O-C=O bond angle from the molecule above is 120 degrees.

Learn more about bond angle here brainly.com/question/29235720

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1 year ago

How many varmints does it take to ruin a chemist's lawn

I am Lyosha [343]

This was a riddle that has been included in a chemistry test.

The answer was a combination of letters that served as answers to previous questions.

How many varmints does it take to ruin a chemist's lawn? MOLES

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4 years ago