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
Cerrena [4.2K]
3 years ago
15

A substance that undergoes a physical change is still the ___________ substance after the change.

Chemistry
1 answer:
katrin2010 [14]3 years ago
5 0
A substance that undergoes a physical change is still the same substance after the change. Unlike a physical change, a chemical change produces new substances with properties different from those of the original substances.
You might be interested in
Evaporation and condensation
bagirrra123 [75]

Answer:

Evaporation and condensation are two processes through which matter changes from one state to another.

Explanation:

7 0
4 years ago
Read 2 more answers
If a compound contain 40% sulphur and 59% oxygen ,find its empirical formula.
elixir [45]

Answer:

SO3

Explanation:

Data obtained from the question include:

S = 40%

O = 59%

To obtain the empirical formula, do the following:

Divide the above by their molar mass as shown below:

S = 40/32 = 1.25

O = 59/16 = 3.69

Next, divide by the smallest as shown below:

S = 1.25/125 = 1

O = 3.69/1.25 = 3

Therefore, the empirical formula is SO3

8 0
3 years ago
Read 2 more answers
Consider the reaction 3X + 2Y → 5C + 4D
Aloiza [94]

This problem is providing a chemical equation between two hypothetical elements, X and Y and asks for the moles of X that are needed to produce 21.00 moles of D in excess Y. After the following work, the answer turns out to be 15.75 mol X:

<h3>Mole ratios:</h3><h3 />

In chemistry, one the most crucial branches is stoichiometry, which allows us to perform calculations with grams, moles and particles (atoms, molecules and ions). It is based on the concept of mole ratios, whereby the moles of a specific substance can be converted to moles of another one, say product to reactant, reactant to reactant, reactant to product and product to product.

<h3>Calculations:</h3>

In such a way, since 21.00 moles of D are given, we need the mole ratio of D to X in order to get the answer, which according to the reaction is 3:4 based on their coefficients in the reaction. Hence, we calculate the required as follows:

21.00molD*\frac{3molX}{4molD} =15.75molX

Learn more about mole ratios: brainly.com/question/15288923

7 0
3 years ago
How many moles of oxygen will occupy a volume of 2.5 liters at 1.2 atm
Citrus2011 [14]

<u>We are given:</u><u>_______________________________________________</u>

Volume of Gas (V) = 2.5L

Pressure (P) = 1.2 atm

Temperature (T) = 25°C  OR 25+273 = 298 K

Universal Gravitational Constant (R) = 0.0821

<u>Solving for number of moles:</u><u>___________________________________</u>

From the Ideal Gas Equation,

PV = nRT

(1.2)(2.5) = n(0.0821)(298)           [plugging the given values]

n = [(1.2)(2.5)] / [0.0821*298]

n = 300 / [298*8.21]

n = 0.12 moles

Hence, there are 0.12 moles of Oxygen in 2.5L of 1.2 atm gas when the temperature is 25°C

7 0
3 years ago
Two springs have different spring constants. How could you identify the spring with the greater spring constant value?
Darya [45]
The spring constant determines how far the spring will stretch for a given applied force: <span>F=kx→k=<span>Fx</span></span><span>. If we place the same mass on the two springs, which means we have placed the same force on them, the one that stretches </span>least<span> has the largest spring constant.
Hope this helps!

</span>
7 0
4 years ago
Read 2 more answers
Other questions:
  • A gas occupies 2.22 l at 3.67 atm. what is the volume at 1.94 atm?
    8·1 answer
  • Proteins are built from lots of ________
    15·1 answer
  • Explain how increasing the level of carbon dioxide in the atmosphere impact the chemistry of the ocean?
    14·1 answer
  • What would these molecules be labeled as? Can be (Alkane, Alkene Aromatic, Alcohol, Ester, Carboxylic acid, amine or amide) (Som
    10·1 answer
  • Please help with this
    14·1 answer
  • 5. There is no water cycle where it is cold.<br> O true<br> O false
    13·1 answer
  • “The use of fossil fuels by human’s is heating up the atmosphere” is an example of a law or theory? Explain your answer in at le
    9·1 answer
  • Cuál es el volumen ocupado por 1000 g de aluminio​
    6·1 answer
  • Can someone please explain Hydrogen bonding to me?
    7·1 answer
  • The pressure of a gas sample at 60.0 °C is decreased from 3.40 atm to 2.60 atm by cooling at a constant volume. What is the temp
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!