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
Verdich [7]
3 years ago
9

Classify each of the following pure substances as an element or a compound. a. helium gas (He) b. mercury (Hg) in a thermometer

c. sugar (C12H22O11) d. sulfur (S) e. lye (NaOH)
Chemistry
1 answer:
olga nikolaevna [1]3 years ago
4 0

Answer:

A. Element

B. Element

C. Compound

D. Element

E. Compound

Explanation:

A, B, and D are elements while C and E are compounds. The three are elements backside basically they are yet to bond with any other element to form a compound.

Although the mercury is in glass, this doesn’t change the fact that it is an element. Being in glass does not affect the independence it enjoys as an element. This serves to mean that even elements can be useful in their elemental states and this does not affect their initial state. They still remain as elements even if they are in a particular confinement.

The other two I.e lye and sugar are compounds as they contain more than one element which are mixed together in appropriate volume

You might be interested in
1.Which of the following are considered pure substances
PilotLPTM [1.2K]
1.) homogeneous mixtures

2.) <span>NaCI, because sodium is a metal and chlorine is a nonmetal</span>

3.) I'm thinking the first the option 
5 0
3 years ago
What are the primary elements of the earths layres?
Vaselesa [24]
The 4 main one are Iron, oxygen, silicon, and magnesium<span />
4 0
3 years ago
How many moles are in 1.51x10^26 atoms of xenon (Xe)? Please and thank you :)!!
RoseWind [281]
<h3>Answer:</h3>

251 mol Xe

<h3>General Formulas and Concepts:</h3>

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

<u>Chemistry</u>

<u>Atomic Structure</u>

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

<u>Stoichiometry</u>

  • Using Dimensional Analysis
<h3>Explanation:</h3>

<u>Step 1: Define</u>

[Given] 1.51 × 10²⁶ atoms Xe

[Solve] moles Xe

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

Avogadro's Number

<u>Step 3: Convert</u>

  1. [DA] Set up:                                                                                                     \displaystyle 1.51 \cdot 10^{26} \ atoms \ Xe(\frac{1 \ mol \ Xe}{6.022 \cdot 10^{23} \ atoms \ Xe})
  2. [DA] Multiply/Divide [Cancel out units]:                                                         \displaystyle 250.747 \ mol \ Xe

<u>Step 4: Check</u>

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

250.747 mol Xe ≈ 251 mol Xe

3 0
2 years ago
Given this equation: 3 MgCl2 + 2 AL - 3 Mg + 2 AlCl3, if 278 grams of magnesium chloride
netineya [11]

Answer: m= 1.02x10² g AlCl3 or 1091.3 g AlCl3

Explanation: solution attached.

Convert mass of Mg to moles

Do the mole ratio between Mg and AlCl3 based from the balanced equation.

Convert moles of AlCl3 to mass using its molar mass.

6 0
3 years ago
The temperature in mark’s town is 30 degrees Fahrenheit. The temperature in Vikki’s town is 82 degrees Fahrenheit. In both towns
allochka39001 [22]

Answer:

sorry don't know the answer but i really need the points sorry

Explanation:

7 0
3 years ago
Other questions:
  • Experiment #1A melting point of an old sample of Naphthalene was completed and a melting range of 77-83 oC was observed and reco
    7·1 answer
  • Which type of energy is associated with the random motions or atoms and molecules in a sample of air
    5·1 answer
  • Which ion will most likely form a precipitate when reacted with SO42 ?
    9·1 answer
  • Penicillinase, also known as β‑lactamase, is a bacterial enzyme that hydrolyzes and inactivates the antibiotic penicillin. Penic
    13·1 answer
  • If 5.738 grams of AgNO3 is mixed with 4.115 grams of BaCl2 and allowed to react according to the balanced equation: BaCl2(aq) +
    9·1 answer
  • Write the charge and full ground-state electron configuration of the monatomic ion most likely to be formed by each:
    13·1 answer
  • Which is not an example of a vestigial structure
    15·2 answers
  • Scientific theories are usually
    7·2 answers
  • How many grams are in 2.38 moles of AlCl₃?<br> please
    11·1 answer
  • How is magma formed?
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!