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Leto [7]
3 years ago
15

If an unknown substance CANNOT be broken down into simpler substances, it is

Chemistry
1 answer:
lisov135 [29]3 years ago
5 0

The correct answer is b. an element

The explanation:

when the ELEMENT is define as substance that cannot be decomposed (broken down) into simpler substances by ordinary chemical means. Examples: gold, iron, carbon, hydrogen, oxygen, nitrogen

Ex: diamond will be broken into carbon as well.

and SUBSTANCE: Material composed of only one kind of matter throughout (same atoms or same molecules).

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Carbon can form large number of organic compounds why
Vinvika [58]

Answer:

Carbon is the only element that can form so many different compounds because each carbon atom can form four chemical bonds to other atoms, and because the carbon atom is just the right, small size to fit in comfortably as parts of very large molecules.

8 0
3 years ago
What does physical weathering involve ?
Charra [1.4K]

Answer:

Physical weathering is caused by the effects of changing temperature on rocks, causing the rock to break apart. The process is sometimes assisted by water. ... Freeze-thaw occurs when water continually seeps into cracks, freezes and expands, eventually breaking the rock apart.

not sure if this is what you meant

Explanation:

5 0
3 years ago
Read 2 more answers
An -ate or -ite at the end of a compound name usually indicates that the compound contains *
nikdorinn [45]

Explanation:

<h2>1.-Ate-contains 3 elements in which one is oxygen</h2><h2>2.-ite-contains 3 elements in which one is Oxygen but the oxygen is less than that of -Ate</h2><h2>3.-ide has 2 elements</h2>
3 0
3 years ago
A solution of hydrochloric acid of unknown concentration was titrated with 0.10 M NaOH. If a 100.-mL sample of the HCl solution
Mnenie [13.5K]

Answer:

The Ph is 3

Explanation:

First of all, calculate the concentration of the acid.

The balanced equation of reaction is:

HCl + NaOH ===> NaCl + H2O

Using titration equation of formula

CAVA/CBVB = NA/NB

Where NA is the number of mole of acid = 1 (from the balanced equation of reaction)

NB is the number of mole of base = 1 (from the balanced equation of reaction)

CA is the concentration of acid = ?

CB is the concentration of base = 0.1M

VA is the volume of acid = 100 mL

VB is the volume of base = 1mL

Substituting

CA×100/0.1×1 = 1/1

Therefore CA =0.1×1×1/100×1

CA = 0.001 M (this is the hydrogen ion concentration)

Ph of the acid is calculated using

Ph = -log [H+]

= -log 0.001

= 3

3 0
3 years ago
if 3.56 moles of HCI reacts with excess Mg(OH)2. how many miles of mgcl2 will be produced, and how many moles of h2o are produce
zmey [24]

Answer:

 H₂O = 3.56 moles

 MgCl₂ = 1.78 moles

Explanation:

Given data:

Moles of HCl = 3.56 mol

Moles of water produced = ?

Moles of MgCl₂ produced = ?

Solution:

Chemical equation:

2HCl + Mg(OH)₂   →  MgCl₂ + 2H₂O

Now we will compare the moles of HCl with water and magnesium chloride.

                         HCl       :        MgCl₂

                            2        :           1

                           3.56    :          1/2×3.56 = 1.78 mol

                         HCl       :          H₂O

                            2        :           2

                           3.56    :          3.56 mol

8 0
3 years ago
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