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
alina1380 [7]
2 years ago
6

Read the descriptions below of two substances and an experiment on each. Decide whether the result of the experiment tells you t

he substance is a pure substance or a mixture, if you can.
Sample A is of a coarse grey powder with a faint unpleasant smell. of the powder is put into a funnel lined with a sheet of thick paper. Distilled water is poured slowly over the powder. Most of the powder disappears, but of a gritty black sand-like material is left on the surface of the paper. Pouring more water over the black material doesn't change how much of it there is.

Sample B is a solid yellow cube with a total mass of 50.0 g. The cube is put into a beaker filled with 250. mL of water. The cube collapses into a small pile of orange powder at the bottom of the beaker. When this powder is filtered out, dried and weighed, it has a total mass of 29.9 g. If the experiment is repeated with 500. mL of water, the powder that's left over has a mass of 10.0 g.
Chemistry
1 answer:
Lelu [443]2 years ago
8 0

Answer:

Sample A - mixture

Sample B- Mixture

Explanation:

Looking at sample A, we can see that as water was poured over sample A, the sample was separated into its components as the powder disappeared leaving behind a gritty black sand-like material on the surface of the paper. A separation of the mixture has taken place.

In sample B, we can clearly see that it is a mixture because the amount of solid recovered is much less than the total mass of the solid put into the beaker. The sample must have been separated into its components.

You might be interested in
Rate how successful you were at using Active Reading skills by responding to the following statement: As i read, i paid attentio
Aleksandr-060686 [28]

It is possible to rate your active reading skills either by using a number is a specific rate or by using a word that qualifies your performance.

<h3>What are active reading skills?</h3>

Active reading skills are a set of skills that help you read actively; this means skills to effectively read a text and understand it.

<h3>How to rate your reading skills?</h3>

In this case, you are asked to rate your ability to pay attention to your understanding, thoughts, and questions while reading. To do this you can:

Rate using numbers:

  1. Select a specific scale rating such as 1 to 5 or 1 10.
  2. Analyze honestly if you used this ability while reading the text.
  3. Give yourself a number. For example, if you apply this skill only sometimes while reading you can rate yourself 5 out of 10.

Rate using words:

  1. Select the types of words that you will use, the most common ones are frequency words such as always, sometimes, and never.
  2. Analyze honestly your performance.
  3. Find the word that best fits it.

Learn more about rate in: brainly.com/question/2278897

8 0
2 years ago
If 0.50 g of O2(g) reacts with excess H2(g), what is the volume of H2O(g) obtained from the reaction at STP?
ozzi

Answer:

0.7 L H2O

Explanation:

4 0
2 years ago
11) Which group of Elements have Similar chemical Properties? *
Kryger [21]
Ca, Sr, Ba have similar chemical properties.
Explanation: They are in the same group (Alkaline Earth Metals)
6 0
3 years ago
4. Identify items in your life that are made of each type of element: metal, nonmetal, and metalloid. For each item, explain why
Neko [114]
Bed frame is metal so it is able to be sturdy and hold up
cleaning agents are mettaliods some contain boron to control strength of bleach , and removing stains 
plotting soil is non metal it is rich with nitrogen which is good for plants 
3 0
3 years ago
Complete the blank with the correct answer choice. 20 kilograms = _______ grams A. 20 B. 200 C. 2,000 D. 20,000
AVprozaik [17]

Answer:

20 kg = 20000 g

Option d

Explanation:

1 kg = 1000 g

20 kg . 1000 = 20000 g

3 0
3 years ago
Other questions:
  • The standard gibbs free energy of formation of ___ is zero: 1. h2o(l) 2. na(s) 3. h2 (g)
    12·1 answer
  • PLEASE ANSWERRRRRRRRRRRRRRRRR
    5·1 answer
  • Choose all the answers that apply. Which of the following has kinetic energy? rolling ball, moving car, book on a table, spinnin
    12·1 answer
  • An unknown material has a mass of 5.75 g and a volume of 7.5 cm3.
    5·1 answer
  • How long must you immerse equipmemt and utensils in a non-chlorine sanitizing solution
    9·1 answer
  • Consider the substances hydrogen (H2), fluorine (F2), and hydrogen fluoride (HF). Based on their molecular structures, how does
    6·1 answer
  • If 20.0 mL of a 0.0800 M HNO3, 35.0 mL of a 0.0800 M KSCN, and 40.0 mL of a 0.0800 M Fe(NO3)3 are combined, what is the initial
    6·1 answer
  • The term ___________ refers to the grinding away of rock by rock particles carried by water, ice, wind, or gravity
    13·1 answer
  • A person who studies genetics is called a geneticist. A geneticist would most likely be interested in learning about which of th
    6·2 answers
  • What type of bonds are shown in this diagram?
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!