The compound magnesium nitrate has the formula Mg(NO3)2.
What is the relative formula mass of magnesium nitrate?

Answers

Answer 1

Explanation:

Answer

Open in answr app

Correct option is

C

148

1 atom of Mg=1x24=24

2 atom of N=2x14=28

6 atom of O=6x16=96

Total mass=148


Related Questions

A student measured the maximum mass of salt that can dissolve in 100 mL of water at five different temperatures.

Which variable should go on the y-axis?


the volume of water

the temperature of water

the mass of salt

the mass of water

Answers

Answer:

the mass of salt

Explanation:

In an experiment, we have an independent variable and dependent variable. The independent variable is the variable that is manipulated to cause changes in other variable while the dependent variable is the variable that responds to the changes made to the independent variable and is measured.

In this case of experiment, the mass of the salt is the DEPENDENT VARIABLE while the different temperatures is the INDEPENDENT VARIABLE. In a graphical representation, the independent variable is always plotted on the x-axis or horizontal axis while the dependent variable is always plotted on the y-axis or vertical axis.

Since the dependent variable is the mass of the salt, it should be plotted on the y axis.

Answer:

The temperature of water

Explanation:

I took the test

Identify which of the compounds below are amphoteric.

a. hydrogen sulfide ion
b. sulfuric acid
c. dihydrogen phosphate
d. water
e. carbonate ion

Answers

The answer is a because hydrogen sulfide acts as a base and acid

Hydrogen sulfide ions, dihydrogen phosphate, and water are amphoteric. Therefore, option (a), (c), and (d) are correct.

What is amphoteric?

Amphoteric can be stated as any compound that can be mixed with other compounds both as a base and an acid. Water is amphoteric as it can be transformed into a compound that can be mixed as an alkali or an acid.  

Amphoterism is explaining the reactivity of a compound that indicates alkaline nature when mixed with an acid and describes acidic characteristics in an alkaline environment.

When acid reacts with water, it forms H₃O⁺ ion adding an H⁺ ion from the acid. When water is combined with a base, it donates a hydrogen H⁺ ion to the base and releases a hydroxide ion.

Besides water, there are many oxides and hydroxides are utilized in amphoterism. The substances that have both characteristics acids are proton donors and bases are proton acceptors are identified as amphoteric substances.

Therefore, HS⁻, H₂O, and H₂PO₄⁻ are amphoteric in nature.

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Write a formula for the ionic compound that forms from magnesium
and oxygen.

Answers

Answer:

MgO

Explanation:

What are the TWO characteristics of an effective collision?

Answers

Answer:

the TWO characteristics of an effective collision are:

1.Molecules collide with sufficient energy

2.Molecules collide with the proper orientation.

In the periodic table,
have common properties,

periods

both groups and periods

neither groups nor periods

groups

Answers

Answer:

both groups and periods

Answer:

groups

Explanation:

Elements in the same group have similar chemical properties because they have the same number of outer electrons and the same valency

Reaction or ionic equation for CuSO4(aq)+CaCO3(aq)

Answers

Answer:

CuCo3+CaSo4

Explanation:

when they react they form that compound in the reaction called double displacement.


How many moles of water are produced if 3.30 moles of N20 is
produced? NH4NO3 --> N20 + 2 H2O (mole to mole conversion) 1 step

Answers

Answer:

The netto reaction equation is:

2 OH- + 2H+ = 2 H2O  

So the answer is 2 moles.

Which atom has the electron configuration 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d²? and 1s²2s²2p⁶3s²3p⁶3d⁷4s²?

Answers

1 is correct as d sub shell cannot hold more than 6 electrons
Hope it helps : )

Which one of the following statements concerning vitamin B12 is correct?
A\ it is present in plant products.
B\ its deficiency is most often caused by a lack of the vitamin in the diet.
C\ it requires a specific glycoprotein for its absorption.
D\ it is involved in the transfer of amino groups.
E\ the cofactor from is vitamin B12 itself.

Answers

Answer:

C it requires a specific glycoprotein for its absorption.

Out of the following statements concerning vitamin B12 the only statement which is correct- it requires a specific glycoprotein for its absorption.

Let's study some facts about vitamin B12:

Vitamin B12 is an essential vitamin found in foods such as meat, fish, and dairy. It requires a specific glycoprotein for its absorption. The body absorbs vitamin B12 from food in a two-step process.

⇒First, hydrochloric acid in the stomach separates vitamin B12 from the protein that it's attached to.

⇒Second, the freed vitamin B12 then combines with a protein made by the stomach, called intrinsic factor, and the body absorbs them together.

Deficiency of Vitamin B12 leads to weakness and fatigue.Transport of B12 in extracellular fluids is dependent on three homologous carrier proteins:

intrinsic factor, transcobalamin (also known as transcobalamin II), and haptocorrin (also known as the R-protein or transcobalamin I).

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What is nitrogen???? explain!!! ​

Answers

Answer:

It is a colourless, odourless, tasteless gas that is the most plentiful element in Earth's atmosphere and is a constituent of all living matter.

Explanation:

Have a nice day :D

Answer:

Nitrogen is a gas

Explanation:

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10. What is the mass of SO3 when -8753 kJ of energy are used according
to the following equation?2S + 302 - 2003 AH = -791.4kJ Is this
Endothermic or Exothermic -8735kJ x mols03/kJ x gSO3/
molSO3

Answers

Answer:

Exothermic

1771 g

Explanation:

Step 1: Write the balanced thermochemical equation

2 S(s) + 3 O₂(g) ⇒ 2 SO₃(g)   ΔH° = -791.4 kJ

Since ΔH° < 0, the reaction is exothermic.

Step 2: Calculate the moles of SO₃ produced when 8753 kJ of energy are released

According to the thermochemical equation, -791.4 kJ are released every 2 moles of SO₃ that are formed.

-8753 kJ × 2 mol/(-791.4 kJ) = 22.12 mol

Step 3: Calculate the mass corresponding to 22.12 moles of SO₃

The molar mass of SO₃ is 80.06 g/mol.

22.12 mol × 80.06 g/mol = 1771 g

What are the main modifications of John Dalton's atomic theory

Answers

MODIFICATION of DALTON's ATOMIC THEORY: 1. Matter is made up of small indivisible particles called atoms: Atoms can, however, no longer be regarded as indivisible because according to Rutherford's discovery, atom is made up of three main subatomic particles called PROTONS, NEUTRONS AND ELECTRONS. 2.

During seafloor spreading, what kind of new earth forms?​

Answers

Answer:

This bubbled-up magma is cooled by frigid seawater to form igneous rock. This rock (basalt) becomes a new part of Earth's crust. Seafloor spreading occurs along mid-ocean ridges—large mountain ranges rising from the ocean floor.

Explanation:

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A student measures her computer keyboard with a meter stick and finds that it has a width of 47.35 cm. Which statement about this measurement is true?

PLZZZZ HELP

A.) All the numbers are certain
B.) The 4 is uncertain
C.) The 5 is somewhat uncertain
D.) The 5 is certain ​

Answers

the 5 is somewhat uncertain (c)

Unknown A melts at 113- 114oC. Known compounds 3-Nitroaniline and 4-Nitrophenol both melt at 112-114 oC. If A is mixed with 3-Nitroaniline and the melting point becomes broad and depressed, what must A be __________A) 3-Nitroaniline B) 4-Nitrophenol C) Both

Answers

Answer:

C) Both

Explanation:

Whenever we mix any pure form of a compound with some other form of a compound which is not in the other standard pure state, this results in the melting point of mixture to get dispersed and it becomes broad form.

Thus, when a known compound of 3-Nitroaniline mixes with both 3-Nitroaniline and 4-Nitrophenol, the melting point of the compound becomes depressed and board.

Thus the correct option is (C).

Using a mole ratio, find the moles of Cu. You have been given the following
balanced chemical equation, and you have 1.5 moles of Al to start.*
2AI
+
3Cu(SO4)
3Cu
+
Al2(SO4)3n
n 1.5 moles

Answers

Answer: 2,25 mol

Explanation: 2Al + 3CuSO4 → Al2(SO4)3 + 3Cu

                    1,5 mol                                                       (1,5*3)/2 mol = 2,25 mol

Explain why the following is an incorrect IUPAC name. 1,3-Dimethylbutane
a. The longest chain is chosen incorrectly.
b. The name of substituent is given incorrectly.
c. The longest chain is numbered incorrectly.
d. Substituents are not listed in alphabetical order.

Answers

Answer:

a. The longest chain is chosen incorrectly.

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to firstly draw the structural formula of the 1,3-Dimethylbutane:

[tex]CH_3-CH_2-CH(CH3)-CH_2-CH_3[/tex]

Thus, we can see that the correct name should be 3-methylpentane since the longest chain was chosen incorrectly, as it must have five carbon atoms.

Regards!

A range of organic molecules can undergo combustion. If pyridine

Answers

Answer:

A range of organic molecules can undergo combustion. Pyridine (C5H5 combustion in the unbalanced reaction shown below wtar o 4 CsH5N + O2 +H2O + CO2 + NO a) Write the balanced equation. (2 points) # 41 CH N +170 70 the flow, t- b) Find the percent yield for the reaction if 10.0 g of pyridine dioxide. (2 points)

Explanation:

hope this helps!

A student swings back and forth from position A to C, as shown.

Which of the following happens when the swing moves from Position C to Position B?

A. Both potential energy and kinetic energy of the student increase.
B. Both potential energy and kinetic energy of the student decrease.
C. Potential energy of the student decreases and kinetic energy of the student increases.
D. Kinetic energy of the student decreases and potential energy of the student increases.

Answers

Answer:

C

Explanation:

KE at B is max and PE is 0

KE at C is 0 and PE is max

so when student swings from C to B

its KE increases

and PE decreases

when nitric acid touches your skin a yellow spot develops what does the spot mean

Answers

Nitric acid is a corrosive acid and leaves the human skin stained yellow due to its reaction with keratin.
Proteins and amino acids that contain phenyl rings form a yellow colored compound when treated with concentrated nitric acid. The yellow stains on the skin are caused due to the reaction of nitric acid with protein keratin present in the skin. This reaction is called xanthoproteic reaction

Which of the following ions is formed when an acid is dissolved in a solution? (5 points) H+
O−
OH−
SO42+

Answers

Answer:

Hence, option B is correct. 1 and 2

Explanation:

NH 4 Cl is a weak base-strong acid salt.

NaCN is a salt of a strong base (NaOH) and weak acid (HCN).In water,

1. NH 4 Cl produces acidic solution

2. KHSO 4 produces acidic solution

because the neutral salt of strong base KOH and strong acid H 2 SO 4 is K 2 SO 4

3. NaCN produces basic solution

4. KNO

3 produces neutral solution

I think this is right but I hope its help ,ur welcome ♥️♥️

Answer:

H+

Explanation:

I took the test :)

PLZZZZZZZZ HELPPPPPP

Answers

Answer:

482

Explanation:

482 a. a a a a a a sahs annaba

Stomach acid is approximately 0.10 M HCl. How many mL of stomach acid can be neutralized by one regular antacid tablet that contains 500 mg of solid CaCO3 (100.09 g/mol)?

Answers

Answer:

100 mL

Explanation:

The reaction that takes place is:

CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂

First we convert 500 mg of CaCO₃ into mmoles, using its molar mass:

500 mg ÷ 100 mg/mmol = 5 mmol CaCO₃

Then we convert 5 mmoles of CaCO₃ into HCl mmoles, using the stoichiometric coefficients of the balanced reaction:

5 mmol CaCO₃ * [tex]\frac{2mmolHCl}{1mmolCaCO_3}[/tex] = 10 mmol HCl

Finally we calculate the volume of a 0.10 M HCl solution (such as stomach acid) that would contain 10 mmoles:

10 mmol / 0.10 M = 100 mL

HELP PLZ SND THANKS WILL MARK YOU AS BRAINLIEST

Answers

Answer:

See explanation

Explanation:

For the first question, we can see that the pressure is constant so we apply Charles law;

V1/T1 =V2/T2

V1T2 = V2T1

V1= 4.5 L

T1= 27 + 273 = 300 K

V2= ?

T2= 127 + 273 = 400 K

V2= V1T2/T1

V2= 4.5 × 400/300

V2= 6L

For question 2, Charles law is also used;

V1/T1 =V2/T2

V1T2 = V2T1

T1= 338 K

V1= 0.480 L

T2= ?

V2= 9.2 L

T2= V2T1/V1

T2= 9.2 × 338/0.480

T2= 6478.3 K

A solution is formed by dissolving 83.2 grams of copper II chloride (CuCl2) in 2.5 liters of water. The molar mass of CuCl2 is 134.45 g/mol.

What is the molarity of the solution?

Answers

Explanation:

the answer is in the above image

Cellular respiration results in a

Answers

Answer:

A form of energy that can be used by cells.

Explanation:

Calculate the energy in kj/mol of photon in red light of wavelength 656nm​

Answers

Answer:

you don't know the answer?ha me too

Which of the following could not act as a medium for a mechanical wave?
a) air
b) empty space
c) liquid water
d) a solid rope

Answers

I believe it is either A or B

Answer:

b) empty space

Explanation:

A mechanical cannot travel through empty space. So option (b) is correct.

A mechanical wave is a wave which needs a material medium for its propagation. For example sound, water waves etc . The medium required by the wave can be a solid, liquid or a gas. Empty space doesn't have any medium, so a mechanical wave cannot travel through empty space.

Humans depend on water from various sources for different reasons. All of these sources are polluted or could be polluted to some extent. Of the following sources, which should humans be most concerned about: lakes, rivers and streams, ocean or groundwater? Explain. answer it no link please anser it a soon as possible pleaseeeeee answer it pleaseee :)​

Answers

Explanation:

Earth is known as the "Blue Planet" because 71 percent of the Earth's surface is covered with water. Water also exists below land surface and as water vapor in the air. Water is a finite source. The bottled water that is consumed today might possibly be the same water that once trickled down the back of a wooly mammoth. The Earth is a closed system, meaning that very little matter, including water, ever leaves or enters the atmosphere; the water that was here billions of years ago is still here now. But, the Earth cleans and replenishes the water supply through the hydrologic cycle.

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How many liters of hydrogen gas are required to react with 3.5" liters of oxygen gas in the following reaction? 2H2(g)+O2(g) -->2H2O(g)

Answers

Answer:

7 L of H₂.

Explanation:

The balanced equation for the reaction is given below:

2H₂ + O₂ —> 2H₂O

From the balanced equation above,

1 L of O₂ required 2 L of H₂.

Finally, we shall determine the volume of H₂ required to react with 3.5 L of O₂. This can be obtained as follow:

From the balanced equation above,

1 L of O₂ required 2 L of H₂.

Therefore, 3.5 L of O₂ will require

= 3.5 × 2 = 7 L of H₂.

Thus, 7 L of H₂ is required to for the reaction.

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