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Zinaida [17]
3 years ago
12

HELPPPPPPPPPPPPPPPPPPPPPPPPPPPP!!!!!!!!!!

Chemistry
2 answers:
likoan [24]3 years ago
8 0

Answer:

BBB

Explanation:

solong [7]3 years ago
4 0

Answer:

ehn wet in be d problem which kind help u want biko?

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Which of the following is an example of a chemical change? Dissolving sugar in coffee Evaporating rubbing alcohol Freezing water
Sholpan [36]

Rusting iron is an example of a chemical change because iron reacts with air when moisture is present.

examples of chemical changes are:

• Molecules rearrange with other molecules to make new substance

• Can be production of flames

• Color change

• Bubbling/fizzing

• Temp. change

Examples of physical changes are:

• Melting

• Boiling

• Freezing

• Condensing

• Breaking

• Bending

• Dissolving


3 0
3 years ago
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Why are protons in an atom so important? Question 5 options: A. Protons determine the atoms' identity (type of element) and wher
Gennadij [26K]

Your answer is A my friend as the atomic number of an atom is determined by the number of protons

4 0
3 years ago
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An empty beaker weighs 39.09 g
Vinvika [58]
<span>To work out the volume of something from its density, use the compound measures triangle: mass over density and volume. To find volume that the beaker holds, divide the mass by the density. V = (388.15 - 39.09)/1. V = 349.06g/cm3. To find the weight of the beaker and the contents, first work out the weight (mass) of the mercury, with this formula: mass = d x v. M = 13.5 x 349.06. M = 4712.31. Then add on the weight of the beaker (39.09g). The total weight is 4751.40g.</span>
3 0
3 years ago
What types of elements are shown in the polyatomic ions in model 1?
boyakko [2]
These ions are disjoint by the charge on the ion into four dissimilar tables and listed alphabetically within each table. Each polyatomic ion, has it called, chemical, formula, two dimensional drawing, and three dimensional representation are given.
The three dimensional buildings are drawn as CPK models. CPK structures represent the atoms as sphere, where the radius of the sphere is equal to the van der waals radius of the atom; these buildings give a measure up the volume of the polyatomic atom.
4 0
3 years ago
Find the mass of 3.66 moles of nitrogen.
Alex_Xolod [135]

Answer:

<h2>102.5166</h2>

Explanation:

Molar mass of N2 = 28.01

3.66 moles x 28.01 grams/mole = 102.5166

8 0
3 years ago
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