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3 years ago

HELPP ME !!!! DUE NOW!!!!!!

Chemistry

2 answers:

Deffense [45]3 years ago

8 0

Answer:

the answer is

Explanation:

hopeit help

sukhopar [10]3 years ago

5 0

Answer:

A.seven

B.eight

D.five

Csix

Explanation:

Hope this help

Mark brainliest

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Calculate the mass of precipitate that forms when 250.0 mL of an aqueous solution containing 35.5 g of lead(II) nitrate reacts w

natulia [17]

<h3><u>Answer;</u></h3>

= 49.42 g

<h3><u>Explanation;</u></h3>

The equation for the reaction between Lead (ii) nitrate and sodium iodide;

Pb(NO3)2(aq) + 2 NaI(aq) ---> 2NaNO3(aq) + PbI2(s)

The precipitate formed in this equation is Lead iodide

We first calculate the moles of lead nitrate;

Moles = mass/molar mass

= 35.5 g/ 331.2 g/mol

= 0.1072 moles

The mole ratio of Pb(NO3)2 : PbI2 is 1 : 1

Therefore; the number of moles of lead iodide is 0.1072 moles

Mass = moles × molar mass

= 0.1072 moles × 461.01 g/mol

<u>= 49.42 g</u>

6 0

3 years ago

How many grams of O2(g) are needed to completely burn 15.6 g of C3H8(g)?

alexdok [17]

15.6gC3H8*44.1gC3H8*32gO2=11.32

7 0

4 years ago

Determine the number of grams of carbon 3.14x 1023 atoms of carbon

tiny-mole [99]

<h3>Answer:</h3>

6.26 g C

<h3>General Formulas and Concepts:</h3>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right<u> </u>

<u>Chemistry</u>

<u>Atomic Structure</u>

Reading a Periodic Table
Moles
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

<u>Stoichiometry</u>

Using Dimensional Analysis

<h3>Explanation:</h3>

<u>Step 1: Define</u>

[Given] 3.14 × 10²³ atoms C

[Solve] grams C

<u>Step 2: Identify Conversions</u>

Avogadro's Number

[PT] Molar Mass of C - 12.01 g/mol

<u>Step 3: Convert</u>

[DA] Set up: $\displaystyle 3.14 \cdot 10^{23} \ atoms \ C(\frac{1 \ mol \ C}{6.022 \cdot 10^{23} \ atoms \ C})(\frac{12.01 \ g \ C}{1 \ mol \ C})$
[DA] Multiply/Divide [Cancel out units]: $\displaystyle 6.26227 \ g \ C$

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 3 sig figs.</em>

6.26227 g C ≈ 6.26 g C

7 0

3 years ago

Read 2 more answers

What is the name of the uppermost layer of the atmosphere? Why does it feel cold there, even though the temperature can be very

Aleonysh [2.5K]

That would be the exosphere. The reason it feels cold, despite high temperatures, is due to lower air density.
Hope it helps!

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4 years ago

Can we use water as a solvent to obtain ethyl butyrate?

klio [65]

Answer:

yes but it depends

Explanation:

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3 years ago