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
Hoochie [10]
3 years ago
9

What are the 5 ways to identify if a chemical reaction happened?

Chemistry
1 answer:
vlada-n [284]3 years ago
7 0

Answer:

a new substance is formed, if heat is formed, color change, the evolution of gas, and bubbles or fizzing

You might be interested in
The nucleus of the atom is held together by the attraction of the positively charged protons and the negatively charged electron
7nadin3 [17]
False.........................
8 0
3 years ago
HELP ASAP I WILL GIVE BRAINLIEST
alina1380 [7]

Answer:

it can last for 30 minutes

Explanation:

because it is very good at giving off heat, extothermal heat can last for quite a while.

3 0
2 years ago
SCIENCE:how can i model a ice cream maker melting!?
lord [1]

Answer:

BURN IT ALIVE MUHAHAHAHAHA

Explanation:

jk

6 0
3 years ago
He process of filtration was used to separate a sample into its components. What conclusion about the sample can be formed based
azamat
The answer is heterogeneous mixture please rate me breinliest
4 0
3 years ago
Read 2 more answers
How many moles and molecules are there in 250g of hydrogen nitrate, HNO3
Viefleur [7K]

Answer:

Number of molecules = 23.9  × 10²³ molecules

Number of moles = 3.97 mol

Explanation:

Mass of HNO₃ = 250 g

Number of moles = ?

Number of molecules = ?

Solution:

Number of moles = mass / molar mass

Number of moles = 250 g/63 g/mol

Number of moles = 3.97 mol

Number of molecules:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

For example,

18 g of water = 1 mole = 6.022 × 10²³ molecules of water

1.008 g of hydrogen = 1 mole = 6.022 × 10²³ atoms of hydrogen

For 250 g of HNO₃:

250 g/ 63 g/mol = 3.97 mole

3.97 × 6.022 × 10²³ molecules = 23.9  × 10²³ molecules

6 0
3 years ago
Other questions:
  • Why is Boron different from Neon
    14·1 answer
  • If the Earth moved farther away from the sun, which of these would probably happen?
    9·2 answers
  • What precipitate, if any, forms when aqueous solutions of li2so4 and nai are mixed?
    6·1 answer
  • Which of the following does NOT state what the arrow means in a chemical equation? a. produces b. yields c. forms d. conserves
    5·2 answers
  • Question 15 need this answered asap (chemistry)
    12·1 answer
  • An automobile gasoline tank holds 42 kg of gasoline. When the gasoline burns, 168 kg of oxygen are consumed and carbon dioxide a
    14·1 answer
  • Which type of reaction does this diagram represent? (picture)
    6·1 answer
  • What happens to energy when sally kicks a soccor ball
    5·1 answer
  • How much of a 10 M solution is needed to make 1 liter of a 1M solution?
    15·1 answer
  • Question 9 (4 points)
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!