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
Lesechka [4]
3 years ago
9

What all indicates a CHEMICAL change? *

Chemistry
1 answer:
myrzilka [38]3 years ago
6 0

one substance becomes two new substances

You might be interested in
Which of the following is necessary for photosynthesis?
Shkiper50 [21]

Answer:

OB

Explanation:

Water is necessary. Since during photosynthesis water reacts with carbon dioxide to form glucose and oxygen.

Calcium is a big NO!!.

4 0
3 years ago
How many grams are in 0.787 moles of kcn
Eddi Din [679]

Answer:

=> moles = Given mass/molar mass

=> 0.787 = Given mass/(39 + 12 + 14)

=> 0.787 = Given mass/65

=> mass = 0.787 × 65

=> <u>mass = 51.155 g</u>

4 0
2 years ago
13 This word describes the circulatory system that provides nutrients and oxygen to living cells of the body.
Nina [5.8K]

Answer: Cardiovascular System

Explanation:

This involves your heart, blood, veins, and arteries

4 0
3 years ago
Balance the equation 2Fe + 3Cl2 → 2FeCl3
Tresset [83]

Answer:

6 Cl0 + 6 e- → 6 Cl-I (reduction)

2 Fe0 - 6 e- → 2 FeIII (oxidation)

4 0
3 years ago
If 4520 kj of heat is needed to boil a sample of water, what is the mass of water
Cerrena [4.2K]

Answer:

1,085g of water

Explanation:

If we have the value 4520kj is because the question is related to Energy and heat capacity. In this case, the law and equation that we use is the following:

                                                  Q= m*C*Δt  where;

Q in the heat, in this case: 4520kj

m is the mas

Δt= is the difference between final-initial temperature (change of temperature), in this exercise we don´t have temperatura change.

In order to determine the mass, I will have the same equation but finding m

                                          m= Q/C*Δt    without   m=Q/C

So: m= 4,520J/4.18J/g°C

      m= 1,0813 g

5 0
3 years ago
Other questions:
  • Consider the nuclear equation below. Superscript 222 subscript 86 upper R n right arrow superscript 218 subscript question mark
    5·2 answers
  • Which item would react most rapidly if touched by a match?
    13·1 answer
  • What is the vapor pressure of a 45.0 % solution of glucose, c6h12o6, at 90.0°c, given that the vapor pressure of pure water at t
    13·1 answer
  • A fluorine ion has 9 protons and a charge of negative one how many electrons are in an ion of fluorine
    14·1 answer
  • Based on its location on the periodic table, how many electrons does oxygen have in its outer energy level?
    14·2 answers
  • High- and low-pressure areas leading to air movement happen when there are differences in: A. density B. clouds C. precipitation
    7·2 answers
  • What is the answer for this question?
    13·1 answer
  • “Representative elements”? Which groups of the periodic table contain the “representative elements”?
    13·1 answer
  • A sample of oxygen occupies a volume of 150 cm3 at 72 C. What will be volume of oxygen when the temperature drops to 2 C?
    5·2 answers
  • we have not visited jupiter to collect samples, so how do we know what the atmosphere is composed of?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!