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3 years ago

PLEASE HELP! DUE IN 5 MINUTES! ( 10 points )

Chemistry

2 answers:

Tom [10]3 years ago

4 0

Answer:

This is what i got from google, so i would say C.)

Explanation:

Name Gold

Atomic Mass 196.967 atomic mass units

Number of Protons 79

Number of Neutrons 118

Number of Electrons 79

max2010maxim [7]3 years ago

3 0

Answer:

Explanation:

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What is meant by the term chemical reaction

pantera1 [17]

Answer:

<h3> $\huge{ \underline{ \underline { \bold{ \sf{ \orange{See \: below}}}}}}$ </h3>

Explanation:

▪️ $\underline{ \bold{ \sf{ \blue{Chemical \: reaction}}}}$

⇒The composition , decomposition or displacement of molecules of matter during chemical change is called chemical reaction.

▪️ $\underline{ \bold{ \sf{ \purple{ \: Further \: more \: explanation}}}}$

Various conditions bring about these changes. The chemical reactions are represented by chemicalequation. The compounds or elements that take part in chemical reaction are called reactant. They are written at the left side of an arrow that represent a change while the compound or elements that formed after the chemical change are called product. They are written at the right side of the arrow.

▪️ $\underline{ \bold{ \sf{ \purple{For \: example}}}}$

When nitrogen reacts with hydrogen to form ammonia :

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3 0

3 years ago

What are the properties of salt

GrogVix [38]

The compound is sodium chloride

6 0

3 years ago

Read 2 more answers

Electrical energy is used to turn the blades of a fan. The amount of energy transformed is seen here: 750 J electrical energy is

Alchen [17]

B) It was transformed into 350 J of heat energy.

Explanation:

The remaining 350J of energy must have been transformed into 350J of heat energy.

A fan works by converting electrical energy into heat energy.

According to the third law of thermodynamics "no system is 100% efficient". The conversion of the energy from one form to another involves a lost in energy.
Heat is one very familiar way by which energy can be lost.
Some component energy is used to heat the fan in the process and it is a wasted energy.
Friction surfaces a heat energy in this process.

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Third law of thermodynamics brainly.com/question/3564634

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6 0

3 years ago

What type of bond would occur between carbon (C) and nitrogen (N)

FrozenT [24]

Answer:

covalent

Explanation:

The carbon and the nitrogen very often form bonds in nature, carbon-nitrogen bonds, which are covalent types of bonds. In fact, the bonds between the carbon and nitrogen are one of the most abundant in the biochemistry and the organic chemistry. The bonds between these two can be double bonds, as well as triple bonds. The carbon-nitrogen bonds have the tendency to be strongly polarized toward the nitrogen.

8 0

3 years ago

What is the mass of 4.5 x 10^22 molecules of hydrogen peroxide (H2O2)? Show your work in the space below.

valentinak56 [21]

Given :

Number of molecules of hydrogen peroxide, N = 4.5 × 10²².

To Find :

The mass of given molecules of hydrogen peroxide.

Solution :

We know, 1 mole of every compound contains Nₐ = 6.022 × 10²³ molecules.

So, number of moles of hydrogen peroxide is :

$n = \dfrac{N}{N_a}\\\\n = \dfrac{4.5\times 10^{22}}{6.022\times 10^{23}}\\\\n = 0.0747 \ moles$

Now, mass of hydrogen peroxide is given as :

m = n × M.M

m = 0.0747 × 34 grams

m = 2.54 grams

Hence, this is the required solution.

6 0

3 years ago