A student adds a tablespoon of sugar to a glass containing tea and ice cubes. The mixture is then stirred until all the sugar dissolves. Which observation is a clue that the student's final mixture is heterogeneous
A. Some ice cubes are floating in the tea
B. The sugar crystals are no longer visible in the tea
C. The mixture looks the same throughout
D. Some water droplets form on the outside of the glass
The subject is science

Answers

Answer 1

Answer:

Answer:

The correct option is;

A. Some ice cubes are floating in the tea

Explanation:

A heterogenous mixture is one that is made up of more than one clearly identifiable phase of matter (such as solid and liquid, liquid and gas, gas and solid, or solid, liquid and gas combined) and therefore having non-uniform composition, which varies from one section to another within the mixture.

Ice cubes which are solids being observable on the surface of the mixture provides clue that the student has made an heterogenous mixture.

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What joint allows a small amount of movement?

Answers

Cartilaginous joints allow for a small amount of movement.
These joints are made of cartilage, which is a flexible connective tissue. Cartilage is less rigid than bone, but doesn't have as much flexibility as muscle.

A diatomic gas has the molar mass of 38.00g/mol. What is the possible formula?

Answers

The answer would be F₂. This is because you have 2 fluorine atoms. so you divide the 38g/mol by 2 atoms which gets you 19 g/mol per atom. Now all you have to do is find the atom with the molar mass of 19g/mol which is fluorine.

I hope this helps :)

Which element has the same number of energy levels as krypton (Kr) and the same number of valence electrons as nitrogen (N) ? iron (Fe)
selenium (Se)
arsenic (As) c
alcium (Ca)

Answers

Answer:

The correct answer is the option: arsenic (As).

Explanation:

Hello!

Let's solve this!

Nitrogen is in group V period 2 and has 5 valence electrons.

The krypton is in period 4.

If we cross these two elements, the element that is in the same group as nitrogen (V) and in the same period as Kripton (4) is Arsenic. If you have any questions, we can check it on the periodic table.

We conclude that the correct answer is the option: arsenic (As).

Answer:

The answer to your question is: Arsenic (As)

Explanation:

Krypton is a noble gas located in group VIII A and 4rd period. Nitrogen is in the 5fh group.

So, we must look for an element located in the 4rd period and group VA.

Iron (Fe) Iron is in the 4rd period and group VI B

Selenium (Se) Selenium is in the 4rd period and group VI A

Arsenic (As) Arsenic is in the 4rd period and group V A and group VA

Calcium (Ca) Calcium is located in group 4rd and group IIA

Help me please?
I need to pass this tomorrow

Answers

Here is what I have come up with, and I have used Mariam Webster for the definitions.

Which of the following shows the correct setup in converting 234 kilopascals to torr?

Answers

1 Pascal is equal to 0.008 Torr. So if you have 234 kilopascals, then

234 kilopascals ( 1000 Pascals/ 1 kilopascals) (0.008 Torr / 1 Pascal) = 1,872 Torr

What is the pH of a 0.028M solution (pH=-log(M))A) 3.56
B)2.88
C)1.55
D)1

Answers

Answer:

Explanation:

-log(0.028)=1.55

Answer:

ph =-log (28 x 10^-2)

= -(log 28 +log10^-2) ie using indices

= -(1.44+(-2) )

=-(-0.56)

= 0.56

=approximately (1) ans

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