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
SSSSS [86.1K]
3 years ago
7

Ryan wants to identify an element. Which piece of information would best help Ryan identify the element?

Chemistry
1 answer:
Keith_Richards [23]3 years ago
4 0
Atomic number, or symbol.
You might be interested in
2. What is critical mass?
Fed [463]

A critical mass is the smallest amount of fissile material needed for a sustained nuclear chain reaction.

8 0
3 years ago
Molecule of water contains hydrogen and oxygen in a 1:8 ratio by mass. This is a statement of __________.A) the law of multiple
fgiga [73]

Answer:

The correct answer is B.

Explanation:

The molecule of water has 2 atoms of hydrogen and 1 atom of oxygen.

The ratio of masses are given as:

2\times 1 g/mol: 1\times 16 g/mol= 1 : 8

This illustrates the law of definite proportions which is also known as law of constant compositions .

The law states that 'the elements combining to form compound always combine in a fixed ratio by their mass.'

Whereas :

Law of multiple proportion states that when two elements combine with each other to form more than one compounds , the mass of one element with respect to the fixed mass of another element are in ratio of small whole numbers.

Law of conservation of mass states that mass can neither be created nor be destroyed but it can only be transformed from one form to another form.

In a balanced chemical reaction ,total mass on the reactant side must be equal to the total mass on the product side.

Law of conservation of energy states that energy can neither be created nor be destroyed but it can only be transformed from one form to another form.

7 0
3 years ago
Nikolas, the fire extinguisher, and the skateboard have a combined mass of 50 kg. What force would the fire extinguisher have to
murzikaleks [220]

Answer:

Force used by fire extinguisher = 60 N

Explanation:

Given:

Mass of skateboard with fire extinguisher = 50 kg

Acceleration of fire extinguisher = 1.2 m/s²

Find:

Force used by fire extinguisher = ?

Computation:

⇒ Force = Mass × Acceleration

⇒ Force used by fire extinguisher = Mass of skateboard with fire extinguisher × Acceleration of fire extinguisher

⇒ Force used by fire extinguisher = 50 kg × 1.2 m/s²

⇒ Force used by fire extinguisher = 60 N

3 0
3 years ago
Read 2 more answers
The chemical reaction 2Cu + O2 → 2CuO + 315 kJ is an _____ reaction. Endothermic, combustion Exothermic, combustion Endothermic,
makvit [3.9K]

the awnser is exothermic (combustion)


4 0
3 years ago
Read 2 more answers
What unknown quantity can be calculated after performing a titration? a. volume c. mass b. concentration d. density
sertanlavr [38]
C & B are switched so I'm not sure if that was a typo or not, but the answer is concentration!
3 0
3 years ago
Other questions:
  • A 250mL sample of air at STP contains approximately 52.5mL of O2. What is the percentage of oxygen in the air
    6·1 answer
  • Distinguish between filtrate and residue in the method of filtration.
    15·1 answer
  • Which phenomena support only the particle theory of light? Check all that apply. reflection
    12·2 answers
  • Which of these is a compound?<br> A)air<br> B)sugar C12H22O11<br> C)the alloy steel<br> D)nitrogen N
    10·1 answer
  • A mixture of 0.307 M Cl 2 , 0.465 M F 2 , and 0.706 M ClF is enclosed in a vessel and heated to 2500 K . Cl 2 ( g ) + F 2 ( g )
    14·1 answer
  • Balance this chemical equation<br><br> __K+__H2O&gt;&gt;&gt; __KOH+__H2
    14·1 answer
  • 2) Where is Earth, exactly? Use this image to find our location. Earth is
    15·1 answer
  • Identify each description as either a physical or chemical change.
    10·1 answer
  • Dalton law states that the partial pressure of a gas in a mixture of gases is _____ to the total pressure of the mixture.
    15·1 answer
  • The haber process is typically carried out at a temperature of approximately 500 ∘c. What would happen to the rate of the forw
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!