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Lelu [443]
3 years ago
6

How do you find the metal “M”

Chemistry
1 answer:
Elodia [21]3 years ago
5 0

M = Sr (strontium)

<em>Step 1.</em> Calculate the <em>moles of CO_2</em>.

Moles of CO_2 = 0.395 g CO_2 × (1 mol CO_2/44.01 g CO_2)

= 0.008 975 mol CO_2

<em>Step 2</em>. Calculate the <em>moles of MCO_3</em>.

Moles of MCO_3 = 0.008 975 mol CO_2 × (1 mol MCO_3/1 mol CO_2)

= 0.008 975 mol MCO_3

<em>Step 3</em>. Calculate the molar mass of <em>MCO_3</em>

MM = grams/moles = 1.324 g/0.008 75 mol = 147.5 g/mol

<em>Step 4</em>. Calculate the <em>atomic mass of M</em>

M_r = <em>x</em> + 12.01 + 3×16.00 = <em>x</em> + 60.01 = 147.5

<em>x</em> = 147.5 – 60.01 = 87.5

<em>Step 5. Identify M</em>.

The element with the closest atomic mass is Sr (A_r = 87.6).

∴ M = Sr and the compound is SrCO_3.

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Plz help for brainlieast answer
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Answer:

Na+

Explanation:

It's an alkali metal

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3 years ago
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Can still be used to do work
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2 years ago
The equation for one of the reactions in the process of turning iron ore into the metal is
Leona [35]

Answer:

2100g or 2.1kg

Explanation:

Based on the equation given,

One mole of Fe2O3 gives two moles of Fe

Molar mass for Fe2O3 is 160g/mol

Molar mass for two Fe is 112g/mol

Convert 3kg to gram

3×1000=3000grams

160g of Fe2O3-112 g of Fe

3000g of Fe2O3-xg of Fe

Xg=3000×112/160

Xg=2100g

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2100/1000=2.1kg

Mass of Fe is 2.1kg

7 0
3 years ago
Please help, I really don’t understand this!!!
kap26 [50]

<u>Analysing the Question:</u>

We are given the balanced equation:

C₆H₁₂O₆ + 6O₂→ 6CO₂ + 6H₂O

from this equation, we can say that: <em>for every 1 mole of Glucose, we need 6 moles of Oxygen</em>

<u>Moles of Glucose used in the reaction:</u>

Molar mass of Glucose = 180 grams / mol

Given mass of Glucose = 1 gram

Mole of Glucose = Given mass / Molar mass

Moles of Glucose = 1 / 180 moles

<u>Mass of Oxygen required:</u>

We know that for every mole of Glucose, we need 6 moles of Oxygen

So, for 1/180 moles of Glucose, we need 6 / 180 = 1 / 30 moles of Oxygen

Mass of 1 / 30 moles of Oxygen:

Mass = Molar mass * number of moles

Mass of Oxygen = 32 * 1/30

Mass of Oxygen  = 32 / 30

Mass of Oxygen = 1.06 grams

5 0
3 years ago
What relationship does Avogadro's law describe?
LenaWriter [7]

Answer:

D. The relationship between volume and moles

Explanation:

Amedo Avogadro found the relationship between the volume of a gas and the number of molecules contained in the volume.

The law states that "equal volume of all gases at the same temperature and pressure contains the same number of molecules or moles".

Mathematically:

                         V ∝ n (P,T constant)

4 0
3 years ago
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