I'LL GIVE BRAINLIEST TO WHO ANSWERS FULL QUESTION FIRST
Example 3: Dry ice (CO2) sublimes at -78°C. What is this temperature in K?​

Answer:

First check to make sure you have a balanced equation

Second use mole ratios to set up what you need to know

Finally convert the moles to grams using the correct molecular weight

I will get you started

According to the reaction above, one mole of Magnesium Nitrate is produced from 2 moles of Nitric Acid

1 mole of Mg(NO3)2/2 moles of HNO3

5 grams of Nitric acid contains

5 g * 1 mole/63 g of Nitric Acid = 0.079365079 moles

Explanation:

For the reaction 2HNO3 + Mg(OH)2 → Mg(NO3) 2 + 2H2O,0.0793grams of magnesium nitrate are produced from 4 grams of nitric acid, HNO3.

Magnesium nitrates are inorganic substances with the formula Mg(NO3)2x, where x is one of six, two, or zero. Each one is completely white. The hygroscopic anhydrous substance swiftly transforms into the hemihydrate when exposed to air. In both water and ethanol, all the salts are extremely soluble.

Magnesium nitrate is a crystalline (sand-like), flavourless, colourless, or white substance. Both the production of petrochemicals and pyrotechnics employ it as a catalyst.

The inorganic nitrate salt of magnesium is called magnesium nitrate. It functions as fertilizer. It is a magnesium salt and an inorganic nitrate salt.

Convert the moles to grams using the correct molecular weight

According to the reaction

one mole of Magnesium Nitrate is produced from 2 moles of Nitric Acid

1 mole of Mg ( NO3 ) 2 / 2 moles of HNO3

5 grams of Nitric acid contains

5 g * 1 mole/63 g of Nitric Acid

= 0.079365079 gram

Thus, For the reaction 2HNO3 + Mg(OH)2 → Mg(NO3) 2 + 2H2O,0.0793grams of magnesium nitrate are produced from 4 grams of nitric acid, HNO3.

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Answer:

zero

Explanation:

For a single atom, the charge is the number of protons minus the number of electrons. Find the charge by balancing charge in a compound.

Ions can be made by single element or covalently bonded group of elements. The covalently bonded group of elements is called polyatomic ions or polyatomic atoms. Therefore, the charge on an atom is written as a superscript.

Any species that contain charge whether it is positive charge or negative charge is called ions. The example of polyatomic ions are sulfate, phosphate, nitrate etc.

Cation is the species that loose electron and attain positive charge while anion is a species which gain electron and attains negative charge so when anion and cation combine in fixed ration the the overall charge of the molecule is zero that is molecule is neutral, the charge over cation and anion is also called oxidation state. The charge on an atom is written as a superscript.

Therefore, the charge on an atom is written as a superscript.

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Answer:

Melated quickly into a silver ball

Answer:

C. melated quickly to a silvery ball

Explanation:

The statement that is not true in the list of options is that an atom that is obeying the octet rule will loose electrons. An atom that is obeying the octet rule will neither loose nor gain electrons.

According to the octet rule, an atom is stable when it has eight electrons in its outermost shell. We must note that stability of atoms is the driving force for all chemical reactions.

Hence, the statement that is not true in the list of options is that an atom that is obeying the octet rule will loose electrons.

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Answer:

this are the topics of biology so you have to learn this topics.

1) An enzyme is a secretion that helps the cell to perform its basic functions.

2) Activation energy is the minimum energy required for a cell to operate.

3) gastritis is an acid secreted by the stomach. it is a very strong acid

Answer:

No, it should sink

Explanation:

Answer:

13.9atm

Explanation:

Use Boyle's Law: P1V1 = P2V2

Manipulate the equation: P2 = P1V1/V2

Substitute the values: P2 = (1.31atm)(5.51L)/0.520L

P2 = 13.88096atm

Optionally round to 3 sig figs to get 13.9atm

Answer:

The answer is: "Rarefactions"

Explanation:

In a longitudinal wave, particles of the medium vibrate in a direction that is parallel to the direction that the wave travels. Places where particles of a medium crowd closer together are called compressions, and places where the particles spread farther apart are called rarefactions.

Answer:

force=d/t, n

Mass=v/t

velocity=m/d

Answer:

C. nonliving.

Explanation:

Answer:

Explanation:

Grass. Producer

Goldfish. Pri. Consumer and Herbivores

Deer. Pri. Consumer and Herbivores

Horse. Pri. Consumer and Herbivores

Snake. Sec. Consumer and Carnivores

Lion. Tert. Consumer and

carnivores

People Pri. Sec. and tert. Consumers

Bacteria. Decomposers

Answer:

O generates power on a smaller scale

Explanation:

The other two options are benefits of renewable energy. You're looking for a con instead of a pro.

Answer: D

Explanation:

An object can store energy as the result of its position. For example, the heavy ball of a demolition machine is storing energy when it is held at an elevated position. This stored energy of position is referred to as potential energy. Similarly, a drawn bow is able to store energy as the result of its position. When assuming its usual position (i.e., when not drawn), there is no energy stored in the bow. Yet when its position is altered from its usual equilibrium position, the bow is able to store energy by virtue of its position. This stored energy of position is referred to as potential energy. Potential energy is the stored energy of position possessed by an object. https://taraenergy.com/blog/an-introduction-to-potential-energy/

Answer:

Balanced Force

Explanation:.

Answer:

C.Valence electrons of metals are very mobile and can carry electric current through the metal.

Explanation:

Metal is made or held together by metallic bonds. Basicaly the valence electrons are free to move through an intire body of metal.

Answer:

When the following redox equation is balanced with smallest whole number coefficients, the coefficient for the iodide ion will be __6__.

Explanation:

From the redox equation, we can see that NO₃⁻ is reduced to NO (from oxidation state +5 to +2), whereas I⁻ is oxidized to I₂ (from oxidation state -1 to 0). The half reactions are balanced with H⁺ (acidic solution), as follows:

Reduction :        2 x (NO₃⁻(aq) + 3 e-  + 4 H⁺ → NO(g) + 2 H₂O)

Oxidation :                                   3 x (2 I⁻(aq) → I₂(s) + 2 e-)

                      ----------------------------------------------------------------------

Total equation: 6 I⁻(aq) + 2 NO₃⁻(aq)+ 8 H⁺ → 3 I₂(s) + 2 NO(g) + 4 H₂O

That is the redox equation with the smallest whole number coefficients.

Accordin to this, the coefficient for the iodide ion (I⁻) is: 6.

Answer:

The answer is B

Explanation:

A pipe to the ground

Answer:

This chemical reaction is a combustion.

n = 1.8mol

Explanation:

The ratio of oxygen to water is 13 to 10

The ratio of oxygen to water is also 43 grams to x

Cross multiply: 13x = 430 grams

Isolate x: x = 33.0769g

Remember that n = mass/Molar mass

The molar mass of water is 18.01528 g/mol

n = 33.0769/18.01528

n = 1.836048

Density is mass/volume.

Let's find the volume.

Volume  =  lwh = (2)(2)(2) = 8

The volume is 8 and the mass is 16.

D = m/v

D = 16/8

D = 2

2 grams per cm^3

Answer:

The iron rusts more easily in wet climates because there is more water in the air, this allows more oxygen to come in contact with the metal to rust.

Explanation:

A known volume of 0.1 M solution of hydrobromic acid is reacted with 25 mL and the concentration of the potassium hydroxide is calculated from the stoichiometry of the reaction.

Titration is a kind of reaction in which the concentration of an unknown solution is determined by reacting a known volume of this solution with a known volume of a standard solution and carrying out the necessary stoichiometric calculations in order to obtain the concentration of the unknown solution.

To obtain the concentration of the potassium hydroxide solution, 25mL of this solution is reacted with a carefully measured volume of the  0.1 M solution of hydrobromic acid. The volume of  0.1 M solution of hydrobromic acid required to reach end point is used calculate the concentration of the potassium hydroxide solution.

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Answer:

Tin (IV) Phosphate

Explanation:

"Stock nomenclature for inorganic compounds is a widely used system of chemical nomenclature developed by the German chemist Alfred Stock and first published in 1919. In the "Stock system", the oxidation states of some or all of the elements in a compound are indicated in parentheses by Roman numerals."

I think there are 6.02 × 10power23 ( Avogadro's constant)

Answer:

Water is a polar covalent compound since it has Oxygen and Hydrogen which are 2 non-metals and the atoms have an unequal distribution of charge.  Oxygen has δ- since it is more electronegative and Hydrogen has δ+. The shape of the water molecule is not symmetrical and dipoles are cancelled out making it a polar covalent compound.

Answer:

it is colourless

Explanation:

its tastleś

Answer:

Aluminium

Explanation:

The bauxite is purified to yield a white powder – aluminium oxide (also known as alumina) – from which aluminium can be extracted.

Answer:

it could be a good job because you will get the chance to explore how animals work not only that zoological veterinarian helps animals if they are in danger or needs help immediately. there are much more benefits for zoological veterinarian

The volume of 0.26 M HBr required to neutralize 40 mL of 0.8 M NaOH is 123.08 mL

We'll begin by writing the balanced equation for the reaction. This is given below:

HBr + NaOH —> NaBr + H₂O

From the balanced equation above,

The mole ratio of the acid, HBr (nA) = 1

The mole ratio of the base, NaOH (nB) = 1

From the question given above, the following data were:

Volume of base, NaOH (Vb) = 40 mL

Molarity of base, NaOH (Mb) = 0.8 M

Molarity of acid, HBr (Ma) = 0.26 M

The volume of the acid, HBr needed for the reaction can be obtained as follow:

MaVa / MbVb = nA / nB

0.26 × Va / (0.8 × 40) = 1

0.26 × Va / 32 = 1

Cross multiply

0.26 × Va = 32

Divide both side by 0.26

Va = 32 / 0.26

Therefore, the volume the acid, HBr needed to neutralize the base, NaOH is 123.08 mL

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Answer:

moles = mass divided by molar mass

Molar mass of Nitrogen gas (N2) = 14*2 = 28 g/mol

Mass of Nitrogen gas = 5g

Moles = 5/28

Moles = 0.18 (rounded)