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
Hunter-Best [27]
3 years ago
11

Which step you should take before performing a scientific investigation

Chemistry
1 answer:
Julli [10]3 years ago
4 0

Answer:

D. Purchase the equipment and chemicals you will need​

Explanation:

You might be interested in
Four alleles determine if a rabbit is white, brown, or gray. This is an example of *
NemiM [27]
The answer is C multiple alleles
6 0
3 years ago
Read 2 more answers
When agno3 was added to test tube d it reacted with cl to form agcl precipitate. Did this result in a shift to the right or the
AlekseyPX

Answer:

Reaction will move rightwards.

Explanation:

Hello there!

In this case, according to the proposed question, it turns out possible for us to  figure out the effect of the addition of silver nitrate, by using the following representative equation for the formation of the silver chloride precipitate:

Ag^+(aq)+Cl^-(aq)\rightleftharpoons AgCl(s)

Now, due to the addition of silver nitrate, we will be actually adding silver ions to the solution, which means that, in terms of the Le Ch atelier's principle, the reaction will shift to the right towards the formation of more silver chloride precipitate.

Best regards!

4 0
3 years ago
How can gravity's role in tectonic plate motion be described
irga5000 [103]

In ridge push, the mantle wells upward because of the convection and elevates the edges of spreading oceanic plates. Because these plates are higher at the spreading center, they are forced downhill due to <em>gravity</em> and eventually flatten out to the ocean floor.

6 0
3 years ago
Read 2 more answers
Why is partial pressure of oxygen greater at lower levels in water.
saw5 [17]

Answer:

Therefore, the partial pressure of oxygen at high altitudes is less than at sea level.

Explanation:

The deep ocean thus has higher oxygen because rates of oxygen consumption are low compared with the supply of cold, oxygen-rich deep waters from polar regions. In the surface layers, oxygen is supplied by exchange with the atmosphere.

5 0
3 years ago
Which statements are true? Δ???? for an exothermic reaction is positive. Δ???? for an endothermic reaction is positive. The evap
LuckyWell [14K]

<u>Answer:</u> The true statements are \Delta H for an endothermic reaction is positive, a combustion reaction is exothermic and when energy is transferred as heat from the system to the surroundings, \Delta H is negative.

<u>Explanation:</u>

There are 2 types of chemical reactions categorized into heat change:

  1. <u>Endothermic reactions:</u> These reactions are defined as the reactions in which energy is absorbed by the system from the surroundings. The \Delta H for these reactions is always positive. For Example: Changing of water into water vapor.
  2. <u>Exothermic reactions:</u> These reactions are defined as the reactions in which energy is released by the system to the surroundings. The \Delta H for these reactions is always negative. For Example: Combustion reactions.

Combustion reactions are defined as the reactions in which a hydrocarbon reacts with oxygen gas to produce carbon dioxide and water. Heat is released during these reactions. Thus, it is considered as exothermic reactions.

Hence, the true statements are \Delta H for an endothermic reaction is positive, a combustion reaction is exothermic and when energy is transferred as heat from the system to the surroundings, \Delta H is negative.

6 0
4 years ago
Other questions:
  • How do nonmetals form bonds
    11·1 answer
  • I need help!!! Calculating pH, pOH, [H+] and [OH-]
    5·1 answer
  • The water cycle is balanced because _____.
    7·2 answers
  • How is the salt formed in a neutralization reaction written in a chemical reaction?
    5·1 answer
  • If you eat foods that are compact and _______, more can fit into your stomach with less discomfort.
    5·2 answers
  • HELP UNDERSTAND, PLEASE!
    14·2 answers
  • When an atom gains an electron to become an ion what happens to its size?
    5·1 answer
  • Suppose you have 1000 lb of waste copper (II) oxide sitting in the basement of your factory. Do you see a problem with sending i
    7·1 answer
  • Label the sun. which layer of the sun is #9?
    5·1 answer
  • Describe a method for making pure crystals of magnesium chloride from magnesium and dilute hydrochloric acid
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!