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
Sedbober [7]
4 years ago
12

A substance was analyzed in a laboratory. It was composed of three elements in a fixed ratio. The substance is an ?

Chemistry
2 answers:
Monica [59]4 years ago
5 0

Explanation:

A compound is defined as the substance which contains different type of elements that chemically combine together in a fixed ratio by mass.

For example, CaCl_{2} is a compound as it contains calcium and chlorine which are different elements. And, both Ca and Cl are combining in 1:2 ratio.

And, for every molecule of calcium chloride these elements will always be present in 1:2 ratio.

Thus, we can conclude that when a substance was analyzed in a laboratory. It was composed of three elements in a fixed ratio. The substance is a compound.

Julli [10]4 years ago
3 0
The element strontium (atomic number = 38) has four naturally-occurring isotopes. They are: Isotope / Percent Abundance / Mass (amu) Sr-84 / 0.56% / 83.9134 Sr-86 / 9.86% / 85.9093 Sr-87 / 7.00% / 86.9089 Sr-88 / 82.58% / 87.9056 The first thing to do is to convert all of the percentages to decimal fractions. To do that just move the decimal point two places to the left. Be careful, though...if the decimal is already at the front of the number you STILL have to move it two places. Add leading zeroes as necessary. 0.56% becomes 0.0056 9.86% becomes 0.0986 7.00% becomes 0.0700 82.58% becomes 0.8258 Next multiply each of the decimal fractions by the mass of each isotope. 0.0056 x 83.9134 = 0.47 0.0986 x 85.9093 = 8.47 0.0700 x 86.9089 = 6.08 0.8258 x 87.9056 = 72.59 Finally add the results to find the average atomic mass. 0.47 + 8.47 + 6.08 + 72.59 = 87.61 amu This agrees closely with the listed atomic mass for strontium, so I know I probably did my work correctly. I hope that helps
You might be interested in
The number of nucleons of an isotope represents the total number of..
Elza [17]

Answer:

The mass number (A), also called atomic mass number or nucleon number, is the total number of protons and neutrons (together known as nucleons) in an atomic nucleus. The mass number is different for each different isotope of a chemical element.

3 0
2 years ago
Witch term refers to a universal fact sometimes nased on mathematical equastions
ss7ja [257]

Answer:

AXIOM.

Explanation:

8 0
3 years ago
What kind of a system is a coffee held in a cup??​<br><br>don't spam..
bagirrra123 [75]

Answer:

open system

Coffee held in a cup is an open system because it can exchange matter water vapors and energy heat with the surroundings.

3 0
3 years ago
Read 2 more answers
Please answer
lutik1710 [3]

Answer:

See Explanation

Explanation:

8.  3, 1, -1, +1/2 => 3pₓ¹ => Aluminum

9.  4, 2, +1, +1/2 => 4d₁¹ => Chromium

10. 6, 1, 0, -1/2 => 6p₀² => Argon

11.  4, 3, +3, -1/2 => 4f₊₃² => Lutetium

12. 2, 1, +1, -1/2  => 2p₊₁² => Neon

8 0
3 years ago
What kind of chemical reaction does the chemical equation sodium + chlorine → sodium chloride represent? combustion decompositio
horsena [70]
The answer is D, synthesis.
4 0
3 years ago
Other questions:
  • Propane (C3H8) burns in oxygen to produce carbon dioxide gas and water vapor. (a) Write a balanced equation for this reaction. I
    12·2 answers
  • On the galapagos islands, Darwin studied many creatures, including finches. Explain what he observed and how it relates to natur
    9·1 answer
  • Which chemical bond (be specific) in a nucleotide is broken to supply the energy for nucleic acid synthesis
    6·1 answer
  • What happens when Mg forms an ionic bond?
    11·2 answers
  • Calculate the volume in milliliters of a 5.11/mol silver nitrate solution that contains 175.g of silver nitrate AgNO3. Round you
    13·1 answer
  • 0.8 gram of divalent metal was dissolved in 100 CC of 1.28 N HCl and the solution was diluted to to 200 cc. then 50cc of this so
    5·1 answer
  • calculate the amount of heat energy required to heat up 23.2 grams of ice from -21° C to 56° C ** please show your work**
    5·1 answer
  • Can someone please help i’m on my final test trying to pass
    12·1 answer
  • Is mass conserved when 40 g of sodium hydroxide undergoes a chemical change during an interaction with 36.5 g of hydrogen chlori
    9·1 answer
  • You need to make a 1:4 dilution of dye in water so that the total volume in test tube one is 60 ml.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!