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3 years ago

A ______ is a hole where the steam looks a lot like a smoke

Chemistry

1 answer:

REY [17]3 years ago

5 0

A <u>DRY ICE</u> is hole were the steam looks a lot a smoke

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What do these two changes have in common?

Xelga [282]

Building a tower out of magnetic blocks and water vapor condensing on a bathroom mirror are only physical changes.

A physical change is easily reversible. It does not involve a change in the composition of a substance.

A tower built out of magnetic blocks can easily be pulled apart and water that condensed on a bathroom mirror can easily change back to vapour by heating.

All these are possible because the both processes are only physical changes.

Learn more: brainly.com/question/6284546

7 0

3 years ago

1) Write the ionic compound formulas for the element sodium and all the elements in group 6A. Example: Sodium + Oxygen=Na2O

PIT_PIT [208]

Answer:

See explanation

Explanation:

1) Group 6A elements include; O, S, Se, Te, Po

Na2O, Na2S, Na2Se, Na2Te, Na2Po

2) Group 7A elements include; F, Cl, Br, I, At

AlF3, AlCl3, AlBr3, AlI3, AlAt3

3) Group 5A elements are;

N, P, As, Sb,Bi

Mg3N2, Mg3P2, Mg3As2, Mg3Sb2, Mg3Bi2

3 0

3 years ago

As photosynthesis occurs in chloroplasts, O2 is produced from _____ via a series of reactions associated with _____. View Availa

Monica [59]

Answer:

H₂O, Photosystem II

Explanation:

Photosynthesis is the process that enables autotrophs such as green plants and algae to generate food using water, carbon dioxide and energy from the sun.
It occurs in two phases, that is, the light-dependent phase and the light-independent phase.
During photosystem II energy from the sun is used to break-down water molecules to yield oxygen and hydrogen ions. Oxygen is released away to the atmosphere while hydrogen ions are used in the next phase to generate ATP molecules.

6 0

4 years ago

Ascorbic acid, or vitamin C (C6H8O6, molar mass = 176 g/mol), is a naturally occurring organic compound with antioxidant propert

ki77a [65]

Answer:

The mass of ascorbic acid in 2.87×10−4 mol are 50,5 mg

Explanation:

Molar mass = 176 g/mol

Moles . molar mass = grams.

2,87 x10*-4 m . 176 g/m = 50,5 x10*-3 grams

A human can take one sweet lime and half to cover the daily requirement of vitamin C. =)

7 0

3 years ago

A student hypothesized that the amount of sunlight a sunflower plant receives determines the number of sunflower seeds the plant

BabaBlast [244]

Answer:

Dependent variable

Explanation:

In every experiment, there must be a dependent variable and an independent variable.

The independent variable is that variable that you have to manipulate in order to receive a response. E.g, in the experiment described in the question, the amount of sunlight a sunflower plant receives is the independent variable.

The dependent variable is the number of seeds produced. It is the response obtained by carefully manipulating the amount of sunlight

5 0

3 years ago

A ______ is a hole where the steam looks a lot like a smoke​

A ______ is a hole where the steam looks a lot like a smoke