All categories

3 years ago

How many atoms are in Na 2 SiO 3

Chemistry

2 answers:

sp2606 [1]3 years ago

8 0

6

Explanation:
2 sodium
1 silicon
3 oxygen

6 atoms

Paul [167]3 years ago

3 0

Answer:

Explanation:

2 sodium

1 silicon

3 oxygen

--------------

6 atoms

You might be interested in

After you join and transfer electrons, what is the number of electrons you

Maurinko [17]

Answer:

2220/1110/

Explanation:

8 0

3 years ago

Calculate the maximum volume in ml of 0.15M HCl that each of the following antacid formulations would be expected to neutralize.

vlada-n [284]

a. 34 mL; b. 110 mL

a. A tablet containing 150 Mg(OH)₂

Mg(OH)₂ + 2HCl ⟶ MgCl₂ + 2H₂O

<em>Moles of Mg(OH)₂</em> = 150 mg Mg(OH)₂ × [1 mmol Mg(OH)₂/58.32 mg Mg(OH)₂

= 2.572 mmol Mg(OH)₂

<em>Moles of HCl</em> = 2.572 mmol Mg(OH)₂ × [2 mmol HCl/1 mmol Mg(OH)₂]

= 5.144 mmol HCl

Volume of HCl = 5.144 mmol HCl × (1 mmol HCl/0.15 mmol HCl) = 34 mL HCl

b. A tablet containing 850 mg CaCO₃

CaCO₃ + 2HCl ⟶ CaCl₂ + CO₂ + H₂O

<em>Moles of CaCO₃</em> = 850 mg CaCO₃ × [1 mmol CaCO₃/100.09 mg CaCO₃

= 8.492 mmol CaCO₃

<em>Moles of HCl</em> = 8.492 mmol CaCO₃ × [2 mmol HCl/1 mmol CaCO₃]

= 16.98 mmol HCl

Volume of HCl = 16.98 mmol HCl × (1 mL HCl/0.15 mmol HCl) = 110 mL HCl

5 0

3 years ago

How many grams of Al are needed to react with 63.0 g of FeO

Tema [17]

The amount of Al required will be 15.77 grams

<h3>Stoichiometric problem</h3>

First, the equation of the reaction:

$2Al +3 FeO -- > Al_2O_3 + 3Fe$

The mole ratio is 2:3.

Mole of 63.0 g of FeO = 63/71.84 = 0.8769 moles

Equivalent moles of Al = 0.8769 x 2/3 = 0.5846 moles

Mass of 0.5846 moles Al = 0.5846 x 26.98 = 15.77 grams

More on stoichiometric problems can be found here: brainly.com/question/14465605

#SPJ1

4 0

2 years ago

Read 2 more answers

How many molecules of H2 will react with one molecule of the following triglyceride? CH2-O-C-(CH)14CH CH O-C-(CH)CH CH (CH)-CH C

disa [49]

Answer:

Explanation:

The full question is shown in the image attached.

If we look at the structure closely, we will discover that there is only one C=C double bond in the molecule.

It is worthy of note that hydrogen (H2) only reduces the C=C double bond. it does not affect any other bond in the molecule.

Hence, only one molecule of H2 is required to reduce one C=C bond present.

8 0

3 years ago

Bismuth oxide reacts with carbon to form bismuth metal:

lesya692 [45]

Answer:

(a) 1.92 moles of Bi produced.

(b) 80.6 grams

Explanation:

Balanced equation: Bi2O3(s) + 3C(s) → 2Bi(s) + 3CO(g)

1st find moles of Bi2O3:

Bi2O3 has Mr of 466 and mass of 447 g

$\hookrightarrow moles = \frac{mass}{Mr}$

$\hookrightarrow moles = \frac{447}{466}$

$\hookrightarrow moles = 0.959227$

2nd find moles of Bi:

Bi2O3 : 2Bi

→ 1 : 2 ------ this is molar ratio.

→ 0.959227 : (0.959227)*2

→ 0.959227 : 1.91845

→ 0.959227 : 1.92

Therefore 1.92 moles of Bi was produced.

3rd Find moles of 3CO:

Bi2O3 : 3CO

1 : 3

0.959227 : (0.959227 )*3

0.959227 : 2.87768

3CO has 2.87768 moles and we know the Mr is 28.

$\hookrightarrow mass = moles * Mr$

$\hookrightarrow mass = 2.87768 * 28$

$\hookrightarrow mass =80.575$ g

Therefore 80.575 grams of CO was produced.

8 0

3 years ago

Read 2 more answers