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
vlabodo [156]
4 years ago
13

State three reason why do you think air is a mixture and water a compound?

Chemistry
1 answer:
crimeas [40]4 years ago
4 0
Because hydrogen and oxygen are two elements on the periodic table, water is composed of three atoms, forming a single molecule, and air is one of the components of water.
You might be interested in
Discord anyone? RaTqUeEn2#8785
GarryVolchara [31]
The answer would be letter A
6 0
3 years ago
Read 2 more answers
An 8 oz serving of whole milk has 8.0 g of fat, 8.0 g of protein, and 13 g of carbohydrates. Approximately how many kilocalories
dsp73
<h3>Answer:</h3>

156 calories

<h3>Explanation:</h3>
  • Carbohydrates, proteins and fats are food substances used by living organisms to generate energy required for the day to day activities.
  • They supply energy which differs per gram for each food substance.
  • That is;

1 g of carbohydrate = 4 calories

1 g of fat = 9 calories

1 g of protein = 4 calories

Therefore, whole milk serving containing 8.0 g of fat, 8.0 g of protein and 13 g of carbohydrates will contain the following number of calories;

8.0 g of fat = 8 g × 9 cal/g = 72 calories

8.0 g of protein = 8 g × 4 cal/g = 32 calories

13 g of carbohydrates = 13 g × 4 cal/g = 52 calories

Total amount of energy = 156 calories

Therefore, an 8 oz serving of whole milk contains 156 calories

8 0
3 years ago
During the phosphatase experiment you will use a 1% w/v of phenolphthalein di-phosphate (PPP). How much PPP do you need to make
MrMuchimi

Answer:

To make 500 mL of a solution of PPP 1% w/v you need 5g

Explanation:

A percent w/v solution is calculated with the following formula using the gram as the base measure of weight (w):

% w/v = g of solute/ mL of solution × 100

A 1% w/v means that you have 1 g of PPP per 100 mL of solution

Thus, if you need to make 500 mL of solution you will need 5 g of PPP.

I hope it helps!

7 0
3 years ago
What do you think happens to the air in the collid when ice cream melts ?
vichka [17]

The air escapes into the atmosphere.

An <em>emulsion</em> is a colloidal dispersion of one liquid in another liquid in which it does not dissolve.

<em>Ice cream</em> is essentially an emulsion of the fat in milk with a sugar solution trapped in a network of small ice crystals. Other chemicals are added to prevent the emulsion from separating, and air bubbles are mixed into the semisolid mixture.

<em>Up to 50 %</em> of the volume of ice cream can be air.

When the ice cream melts, the air bubbles are <em>no longer trapped</em>. They just escape into the atmosphere.

If you re-freeze the melted ice cream, its volume will be much less than the original.

6 0
3 years ago
Read 2 more answers
A sample of gas has a volume of 20.0 liters at 22.0° C. If the pressure remains constant, what is the volume at 100.0° C?
miv72 [106K]
The problem applies Charles' law since constant pressure with varying volume and temperature are given. Assuming ideal gas law, the equation to be used is \frac{ V_{1} }{ T_{1} }=\frac{ V_{2} }{ T_{2} }. We make sure the temperatures are expressed in Kelvin, hence the given added with 273. The volume 2 is equal to 25.2881 liters.
6 0
3 years ago
Read 2 more answers
Other questions:
  • Radium has a half-life of 1,620 years. In how many years will a 1 kg sample of radium decay and reduce to 0.125 kg of radium?
    11·2 answers
  • When co2 levels are low and o2 levels are high, rubisco adds an o2 molecule to rubp. what are the consequences of this reaction?
    10·1 answer
  • Convert 45 joules to heat calories
    13·1 answer
  • Which of the following is true regarding the law of conservation of mass?
    12·1 answer
  • Which three elements seem to make up so much of the world around us?​
    7·1 answer
  • Describe a single measurement that you could make that shows that a kettle is less than 100% efficient (providing evidence that
    14·1 answer
  • What are five characteristics of a group on the periodic table?
    14·1 answer
  • What is the density, in g/mL, of a cube of lead (Pb) that weighs 0.371 kg and has a volume of 2.00 in.3
    8·1 answer
  • Green light has a wavelength of 550nm. What is the frequency of a photon of green light?
    15·1 answer
  • What determines how molecules are redistributed in diffusion?​
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!