1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ASHA 777 [7]
3 years ago
10

1. How to elements differ from compounds?

Chemistry
1 answer:
REY [17]3 years ago
5 0

Answer:

A compound contains atoms of different elements chemically combined together in a fixed ratio. An element is a pure chemical substance made of same type of atom. ... Elements contain only one type of atom.

Explanation:

You might be interested in
How many atoms are in 10.1 g Ne
LekaFEV [45]

Answer:

3.01 × 10²³ atoms Ne

General Formulas and Concepts:

<u>Atomic Structure</u>

  • Reading a Periodic Tables
  • Moles

<u>Stoichiometry</u>

  • Using Dimensional Analysis

Explanation:

<u>Step 1: Define</u>

<em>Identify</em>

[Given] 10.1 g Ne

[Solve] atoms Ne

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

Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

[PT] Molar Mass of Ne: 20.18 g/mol\

<u>Step 3: Convert</u>

  1. [DA] Set up:                                                                                                       \displaystyle 10.1 \ g \ Ne(\frac{1 \ mol \ Ne}{20.18 \ g \ Ne})(\frac{6.022 \cdot 10^{23} \ atoms \ Ne}{1 \ mol \ Ne})
  2. [DA] Divide/Multiply [Cancel out units]:                                                          \displaystyle 3.01398 \cdot 10^{23} \ atoms \ Ne

<u>Step 4: Check</u>

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

3.01398 × 10²³ atoms Ne ≈ 3.01 × 10²³ atoms Ne

4 0
3 years ago
Can somebody plz help answer these questions plz (grwde7science) only if u know how to do it thx :3
dem82 [27]
1. Crystallization. Magma cools either underground or on the surface and hardens into an igneous rock.
2. weathering and erosion
3. This happens due to geologic uplift and the erosion of the rock and soil above them. At the surface, metamorphic rocks will be exposed to weathering processes and may break down into sediment.
4. Rock Melting.
Metamorphic rocks underground melt to become magma. If you need more help https://www.ck12.org/earth-science/rock-cycle-processes/lesson/Rocks-and-Processes-of-the-Rock-Cycle-HS-ES/
8 0
3 years ago
Which equation represents the correct net ionic equation for the reaction between Ca(OH)2 and H2SO4?
Georgia [21]

<u>Answer:</u> The correct net ionic equation for the reaction is 2H^{+}(aq)+2OH^{-}(aq)\rightarrow 2H_2O(l)

<u>Explanation:</u>

Net ionic equation is defined as the equations in which spectator ions are not included.

Spectator ions are the ones that are present equally on the reactant and product sides. They do not participate in the reaction.  

The balanced molecular equation is:

Ca(OH)_2(aq)+H_2SO_4(aq)\rightarrow CaSO_4(aq)+2H_2O(l)

The complete ionic equation follows:

Ca^{2+}(aq)+2OH^-(aq)+2H^+(aq)+SO_4^{2-}(aq)\rightarrow 2Ca^{2+}(aq)+SO_4^{2-}(aq)+H_2O(l)

As calcium and sulfate ions are present on both sides of the reaction. Thus, they are considered spectator ions.

The net ionic equation follows:

2H^{+}(aq)+2OH^{-}(aq)\rightarrow 2H_2O(l)

Hence, the correct net ionic equation for the reaction is 2H^{+}(aq)+2OH^{-}(aq)\rightarrow 2H_2O(l)

7 0
3 years ago
Sodium hydroxide solution reacts with copper (II) nitrate solution to produce a
dsp73

Answer:

brown precipitate.. d.. option

7 0
2 years ago
Which radioactive element is used to determine the absolute age of late pleistocene animal remains?
vladimir2022 [97]
Carbon-14 is <span>radioactive element is used to determine the absolute age of late pleistocene animal remains because it is abundant in organic matter. Its decay is first-order and its half-life has been determined to be 5730 years which </span><span>means that after </span>5730 years, the amount of carbon<span>−</span>14<span> will be 1/2 of the initial amount.</span>
7 0
3 years ago
Other questions:
  • What is formed when two or more different elements chemically combine?
    9·1 answer
  • Acid-water solutions taste __________. Acids react with __________ to produce salts and water. Acid-base reactions are called __
    11·1 answer
  • What does all flexible objects have in common
    12·1 answer
  • Which planet listed below will take the longest amount of time to orbit the sun?
    5·1 answer
  • Which methods could be used to dilute a solution of sodium chloride (NaCl)?
    6·1 answer
  • If a solution containing 51.429 g of mercury(ii) perchlorate is allowed to react completely with a solution containing 16.642 g
    14·1 answer
  • Please help. me with my chemistry
    5·1 answer
  • You have 281 kilojoules how many kilocalories is it need to know ASAP
    7·1 answer
  • Select True or False: The reaction of hydrogen chloride gas with propene will yield 1-chloropropane as the main product
    7·1 answer
  • What are the two main classes of simple machines?
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!