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
inna [77]
3 years ago
8

Test results indicated a chemical change has taken place ​

Chemistry
1 answer:
GaryK [48]3 years ago
5 0

Some signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color chage, formation of a precipitate, formation of a gas, odor change, temperature change.
You might be interested in
Compare and contrast the goals of the General Mining Law of 1872 and the proposed Hardrock Mining and Reclamation Act of 2009.
Ad libitum [116K]

Answer: seen below

Explanation:

the goals of the General Mining Law of 1872 state that, anyone can stake mining claims on federal land, and they pay no more than $5 an acre while they keep 100% of profits with little to no environmental provisions.

Taxpayers pay for clean up of sites.

While the goals of proposed Hardrock Mining and Reclamation Act of 2009 includes, Increasing acreage of lands off limits to exploration and development. Protecting of National Parks and National Monuments is essential. Giving land managers the ability to balance mineral activities with other uses of public land. Giving state, local and tribal government the ability to put lands off limits to mining although, this bill never became law.

4 0
3 years ago
The question is below
Nezavi [6.7K]
The correct conditions for measuring reduction potentials (the tendency to acquire electrons and become reduced), is 25C and 1M (or 1 mole/litre) for reactants - ANSWER B.
3 0
3 years ago
Which one of these complementary base pairs can form three hydrogen bonds?
ValentinkaMS [17]

Answer:

Option D is the correct answer

Explanation:

There are three hydrogen bonds formed between Guanine and Cytosine base.  

The first hydrogen bond is formed between the oxygen atom on Carbon-6 (C-6) of guanine, and one of the hydrogen atoms attached to the Nitrogen atom (i.e the one of the hydrogen atoms in the amino group) on the Carbon-4 (C-4)of the cytosine base.  

The second hydrogen bond is formed between the hydrogen atom on Nitrogen-1 (N-1) of the guanine base and Nitrogen-3 (N-3) of the cytosine base.

The third hydrogen bond exist between one of the hydrogen atoms in the amino group attached to the second Carbon (C-2) of the guanine base, and the oxygen atom attached to the second Carbon (C-2) of the cytosine base.  

7 0
3 years ago
What volume of 0.200 M H2SO* will be needed to neutralize<br><br> 50.00 mL of 0.178 MNaOH?
mixas84 [53]

Answer:

10.00 mL

Explanation:

Please, do not forget to write the dot and 2 of Zeros after the number 10 in the answer!

Please see the step-by-step solution in the picture attached below.

Hope this answer can help you. Have a nice day!

7 0
3 years ago
Which element would mostly have chemical properties similar to that of magnesium (Mg)?
DanielleElmas [232]

The elements of same group are placed in same group as they have similar properties. So Calcium is the element which resembles Mangesium.

Calcium and Magnesium both are alkaline earth metals.

They have similar properties as they have similar outer or valence shell electronic configuration

The general electronic configuration of alkaline earht metal is ns2

The electronic configuration of Mg [atomic number 12] and Ca [atomic number 20] are

[Ne]3s^{2}  and [Ar]4s^{2} respectively.


7 0
3 years ago
Other questions:
  • Dichlorosilane is a compound that contains silicon (Si), hydrogen (H), and chlorine (Cl) atoms. It has the chemical formula SiH2
    6·1 answer
  • Mount Everest is approximately 8,000 meters high. How many miles high is Mount Everest?
    14·2 answers
  • calculate the number of grams of magnesium in 50g of magnesium sulfide. Use percentage composition and gravimetric factor.
    8·1 answer
  • How many moles of C6H1206 are consumed if 6 moles of O2 are consumed?​
    15·2 answers
  • An increase in which of the following does not increase the rate of a chemical reaction?
    15·1 answer
  • When they're trying to solve a problem, engineers follow a series of Question 1 options: problems steps solutions tests
    5·2 answers
  • Explain in terms of atomic structure, why cesium has a lower first ionization energy than rubidium. Determine the family/group i
    10·1 answer
  • Sugar dissolves in water. Which statement best describes what is happening? (1 point)
    13·1 answer
  • Toluene (C7H8) burns in oxygen to produce cardon dioxide and water. (a) How many grams of oxygen are neccessary for the combusti
    13·1 answer
  • The difference between oxygen and ozone
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!