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3 years ago

1. How many molecules are in 643.21 grams of

Chemistry

1 answer:

Veronika [31]3 years ago

3 0

Answer: Calculate the molar mass of Mg3(PO4)2 in grams per mole or search for a chemical formula or substance.

Missing: 643.21 ‎ Must include: 643.21. A balloon is filled with 36.2 liters of Cl2 gas at STP. How many moles of chlorine gas are inside? Solution: 36.2

Missing: 4.061 ‎Must include: 4.061 .For H2O, there is one atom of oxygen and two atoms of hydrogen. A molecule can be made of only one type of atom. In its stable molecular form, oxygen exists as two atoms and is written O2. to distinguish it from an atom of oxygen molecule of three oxygen atoms, in grams per mole or search for a chemical ... Did you mean to find the molecular weight of one of these similar formulas- 80.34.

Explanation: PLEASE MARK ME AS BRAINLIEST!

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What is back titration?

Yakvenalex [24]

Answer:

Back titration is a titration done in reverse; instead of titrating the original sample, a known excess of standard reagent is added to the solution, and the excess is titrated.

I hope it's helpful!

3 0

2 years ago

What is the mass, in grams, of

DIA [1.3K]

Answer:

The answers to your question are below

Explanation:

a) 6.85×1020 H2O2 molecules

H2O2 MW = 32 + 2 = 34 g

34g -------------------- 6.023 x 10²³ molecules

x ------------------- 6.85 x 10 ²⁰

x = (6.85 x 10 ²⁰)(34)/ 6.023 x 10²³

x = 0.038 g

3.3×1022 SO2 molecules

MW SO2 = 32 + 32 = 64g

64 g -------------------- 6.023 x 10²³ molecules

x -------------------- 3.3×1022 SO2 molecules

x = (3.3×1022 SO2)(64) / 6.023 x 10²³

x = 3.51 g

5.5×1025 O3 molecules

MW = 16 x 3 = 48g

48 g ----------------- 6.023 x 10²³ molecules

x ------------------ 5.5×1025 O3 molecules

x = (5.5×1025 )(48) / 6.023 x 10²³

x = 4383 g

9.30×1019 CH4 molecules

MW = 12 + 4 = 16 g

16 g -------------------- 6.023 x 10²³ molecules

x -------------------- 9.30×1019 CH4 molecules

x = (9.30×1019)(16) / 6.023 x 10²³

x = 0.0025 g

4 0

2 years ago

in the future, clean energy sources, such as solar power, may be used to create hydrogen fuel true false

borishaifa [10]

False, b/c you can't turn electricity into a fuel

3 0

3 years ago

Read 2 more answers

Which statement best describes the function of capillaries, arteries, and veins in the circulatory system? A. Capillaries delive

kondor19780726 [428]

The answer is a. The arteries are red and transfer blood to the heart. Veins are blue and transfer blood away from the heart and to all of the different parts of the body. The capillaries are in-between the veins and arteries and provide blood to cells.

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3 years ago

Read 2 more answers

What is the empirical formula of a compound containing 5.03 grams carbon, 0.42 grams hydrogen, and 44.5 grams chlorine?

djverab [1.8K]

The empirical formula of the compound is CHCl₃.

<h3>Calculation:</h3>

Given,

Mass of carbon = 5.03 g

Mass of hydrogen = 0.42 g

Mass of chlorine = 44.5 g

Molecular weight of carbon = 12 g

Molecular weight of hydrogen = 1 g

Molecular weight of chlorine = 35.4 g

First, calculate the moles of each element,

Moles = given mass/ molecular weight

Moles of carbon = 5.03/12 = 0.42

Moles of hydrogen = 0.42/1 = 0.42

Moles of chlorine = 44.5/ 35.4 = 1.26

Divide the moles of each element by the smallest number of moles,

0.42 mol of C/ 0.42 = 1 C

0.42 mol of H/ 0.42 = 1 H

1.26 mol of Cl/0.42 = 3 Cl

The ratio of elements is 1:1:3

Therefore the empirical formula of the compound will be CHCl₃.

Learn more about empirical formula here:

brainly.com/question/20708102

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5 0

2 years ago