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
professor190 [17]
3 years ago
15

Which of the following is not a physical change?

Chemistry
1 answer:
eimsori [14]3 years ago
6 0
Combustion is not a physical change instead it's a chemical change because when we burn things we cannot regain it's original form.
You might be interested in
which of the following describes how ice could have once covered warm places such as australia and india
4vir4ik [10]

Answer:

U shaped vallies?

Explanation:

(i dont know if this was one of the options)

6 0
3 years ago
Which of the following accurately describes a charactic of fungi
Black_prince [1.1K]
What are your options?
3 0
3 years ago
How many moles are in 3.45 g of Na2O?Round your answer to three significant
Neporo4naja [7]

Answer: There are 0.056 moles present in 3.45 g of Na_{2}O.

Explanation:

Given : Mass = 3.45 g

Moles is the mass of substance divided by its molar mass.

Hence, moles of Na_{2}O (molar mass = 61.98 g/mol) is as follows.

Moles = \frac{mass}{molar mass}\\= \frac{3.45 g}{61.98 g/mol}\\= 0.056 mol

Thus, we can conclude that there are 0.056 moles present in 3.45 g of Na_{2}O.

6 0
3 years ago
Constance has an apple that weighs 85,000 milligrams and a peach that weighs 0.15 kilograms. which fruit has the greater mass? c
Rama09 [41]

The fruit which has the greater mass is peach i.e. 150 grams.

<h3>What is mass?</h3>

Mass is a quantity which is used to define that what amount of substance will occupy any space or present in the given object.

We have given,

Weight of apples = 85,000 mg

Weight of peach = 0.15 kg

To compare the quantity first we have to convert both of these units in the same unit, and we know that:

In 1 kilogram = 1000 grams

And in 1 grams = 1000 milligrams

So, we convert both the units into grams as:

85,000 mg =  85,000 / 1000 = 85 grams

0.15 kg = 150 grams

So, the mass of peach is high.

Hence, peach has the greater mass.

To know more about mass, visit the below link:

brainly.com/question/15526412

4 0
2 years ago
Suppose of lead(II) acetate is dissolved in of a aqueous solution of ammonium sulfate. Calculate the final molarity of acetate a
Lynna [10]

Answer:

0.294 M

Explanation:

The computation of the final molarity of acetate anion is shown below:-

Lead acetate = Pb(OAc)2

Lead acetate involves two acetate ion.

14.3 gm lead acetate = Mass ÷ Molar mass

= 14.3 g ÷ 325.29 g/mol

= 0.044 mole

Volume of solution = 300 ml.

then

Molarity of lead is

= 0.044 × 1,000 ÷ 300

= 0.147 M

Therefore the molarity of acetate anion is

= 2 × 0.147

= 0.294 M

3 0
4 years ago
Other questions:
  • Explain the difference between the reacts and products of a chemical reaction
    13·1 answer
  • Consider the balanced reaction bellow. How many moles of barium hydroxide,Ba(OH)2, would be required to react with 117g hydrogen
    9·1 answer
  • The pitch of a sound is determined by it's wavelength and ____together, or it's frequency alone?
    6·1 answer
  • Where do we find the most abundant natural supply of Cl ions?
    9·1 answer
  • Elements that are anions
    5·1 answer
  • Need help with these three questions!!!​
    7·1 answer
  • Four forces see exerted on each of the two objects shown below:
    7·1 answer
  • PLEASE PLEASE I do not understand may someone kindly help me pls
    8·1 answer
  • - What are the distinguishing characteristics of the spectra from following sources ?
    11·1 answer
  • Describe an element and a compound. Compare and contrast their similarities and differences. Identify how elements are related t
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!