What is the molar mass of MgSO4?

Answer:

1. 36.5g                 2. 103.3g

3. 140g                   4. 151g

5. 159g

Explanation:

1. HCl

atomic mass of H= 1g

atomic mass of Cl = 35.5g

solution:

       HCl

     = 1+ 35.5

      = 36.5g

2. ZnF2

atomic mass of Zn = 65.3g

atomic mass of F = 19g

solution:

                ZnF2

               = 65.3 + 2(19)

                =65.3 + 38

                = 103.3 g

3. K2CO3

 atomic mass of K= 40g

atomic mass of C = 12g

atomic mass of O = 16g

Solution:

               K2CO3

               = 2(40) + 12 + 3 (16)

                = 80 + 12 + 48

                 = 140g

4. FePO4

  atomic mass of Fe = 56g

  atomic mass of P= 31 g

  atomic mass of O = 16g

solution:

              FePO4

              = 56 + 31 + 4 (16)

              = 56 + 31 + 64

               = 151g

5. Cu2S

atomic mass of  Cu = 63.5g

atomic mass of S = 32 g

solution

       Cu2S

       = 2(63.5 )+ 32

        = 127 + 32

         =159g

Answer:

1. East on the box they are facing, West on the side from behind, North on the left side, South on the right side.

2. Because they all were facing towards the sun and the sun rise from east.

3. This one's answer is in the first answer.

4. The picture shows early morning because the shadow of the boys are in a flat position but if would have been late morning then it would not been covering that much area.

Answer:

The answer would be B, PC13

Explanation:

Answer:

B: PC13

Explanation:

Answer: Mass of substance / Mass of one mole.

Explanation:

Taking into account the reaction stoichiometry, 7 moles of water will be produced if 3.5 moles of sulfuric acid reacts.

In first place, the balanced reaction is:

H₂SO4 + 2 NH₂OH → 2 H₂O + (NH₄)₂SO₄

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The following rule of three can be applied: If by stoichiometry of the reaction 1 mole of sulfuric acid produces 2 moles of water, 3.5 moles of sulfuric acid produces how many moles of water?

[tex]moles of water=\frac{3.5 moles of sulfuric acidx2 moles of water}{1 mole of sulfuric acid}[/tex]

moles of water= 7 moles

Then, 7 moles of water will be produced if 3.5 moles of sulfuric acid reacts.

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From the calculations and the data provided in the question, the required temperature is 380 K.

The Clasius Clapeyron equation is used to obtain the vapor pressure of a substance at two different temperatures.

Hence;

lnP2/P1 = -ΔHvap/R(1/T2 - 1/T1)

ln(145/1) = -40.7 * 10^3/8.314(1/T2 - 1/273)

4.977 = -(4811)(1/T2 - 1/273)

4.977/-(4811) = (1/T2 - 1/273)

-0.00103 = 1/T2 - 1/273

-0.00103 +  1/273 =  1/T2

0.002633 =1/T2

T2 = 380 K

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Answer:

.846 grams of H2

Explanation:

Answer: i don't know what you mean by control  but if you mean what will happen is the balloon if he rubs it on his head and not his clothes electrons move from the atoms and molecules in his hair onto the balloon and since electrons have a negative charge the balloon will become negatively charged and his hair will become positively charged.

Answer: the ballon that was not rubbed with cloth

Explanation:

Answer:

3 moles

Explanation:

The balanced chemical equation between Calcium Hydroxide and Hydrochloric acid is:

Ca(OH)₂ + 2HCl → CaCl₂ + 2H₂O

The ratio of HCl to H₂O is  2 : 2

So if 3 moles of hydrochloric acid is added, 3 moles of water will be formed:

[x is the no of moles of H₂O produced]

2 : 2

3 : x  

[Cross multiply]

2x = 2 × 3

2x = 6

x = [tex]\frac{6}{2}[/tex] = 3 moles

Answer: Atoms with a lower atomic mass have a greater density than the atom with the higher atomic weight because the atoms are tightly packed together. The volume of a material can change with temperature and pressure. This can also modify the density of the material.

Explanation: HOPE IT HELPS YOU . PLEASE GIVE BRAINLIEST . THANKS .

Answer:

0.16 atm

Explanation:

Let's look at the formula PV=nRT. First of all, T should be in kelvin, so let's add 273. Now solve for P so we get P = nRT/V.

Now let's plug these in...

P = (0.034 mol)(0.08206 L atm mol^-1 K^-1)(298 K)/5.1 L

After solving and rounding to sig figs we get 0.16 atm

Answer:

youre gonna have to include the answers for me to help

Explanation:

Answer:

The volume of the gas decreases.Explanation:

Answer:What type of compound is Magnesium bromide?

Magnesium bromide (MgBr2) is a chemical compound of magnesium and bromine that is white and deliquescent. It is often used as a mild sedative and as an anticonvulsant for treatment of nervous disorders. It is water-soluble and somewhat soluble in alcohol.

Explanation:

The pH of the solution in which 4.85g of HCl is present is 1.3.

pH of the solution will be calculated by using the below equation:
pH = -log[H⁺]

Relation between the mass and moles of any substance will be represented as:

Moles of HCl = 4.85g / 36.4g/mol = 0.13 moles

Given volume = 2.5 L

Concentration in terms of molarity will be calculated as:
M = n/V

M = 0.13mol / 2.5L = 0.05 M

So, 0.05M HCl solution have the same amount of concentration of H⁺ ion. Now pH will be calculated as:

pH = -log(0.05) = 1.3

Hence required pH of the solution is 1.3.

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1) Heat is transferred from the bath to the bottle. This will cause the temperature of the gas molecules to increase, and thus their kinetic energy will increase. As a result, the size of the balloon will increase.

2) The size of the balloon would decrease because since the temperature is decreasing, the particles have less kinetic energy, and thus are packed more closely together.

Answer:

7.5 kcal

Explanation:

1.0 cal /g-C   * 100 g * (100- 25 C) = 7500 cal = 7.5 kcal

The amount of heat energy necessary to raise the temperature of 100 g of water at room temperature (25°C) to the boiling point (100°C) is 7.5 kcal.

Given to us the mass of water, the specific heat of water, and the change in temperature, we need to calculate the amount of heat energy.

m = 100 g

c = 1.0 cal/g°C

ΔT = (100 °C - 25 °C) = 75 °C

To calculate the amount of heat energy required, we can use the formula:

Q = m × c× ΔT

Where:

Q = heat energy (in calories)

m = mass of water (in grams)

c = specific heat of water (in cal/g°C)

ΔT = change in temperature (in °C)

Substituting the values into the formula:

Q = 100 g × 1.0 cal/g°C × 75 °C

Q = 7500 cal

7500 cal = 7.5 kcal

Therefore, the amount of heat energy required to raise the temperature of 100 g of water from 25 °C to 100 °C is 7500 calories, which is equivalent to 7.5 kcal.

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Answer:

poisoning, breathing problems, skin rashes, allergic reactions, allergic sensitisation, cancer, and other health problems from exposure.

Explanation:

many hazardous chemicals are also classified as dangerous goods.

Answer:

The position of the moon during its orbit around Earth.

Explanation:

1) The statement "A fire burns down a house" best describes how energy can be harmful.  Option (A) is correct.

2) Among the four boxes, Box D has the highest mass of 700 grams. Option (D) is correct.

3) Among the given boxes, Box C is the one with a mass of 50 grams.

Option (B) is correct.

1) In this scenario, the energy in the form of heat from the fire is released uncontrollably, leading to the destruction of the house. Fire represents a potentially dangerous and destructive form of energy when it is not properly contained or controlled. It illustrates how energy, when harnessed inappropriately or unintentionally, can have harmful consequences, causing damage to property and posing a risk to human safety.

2) This means Box D is the heaviest compared to the other boxes labeled A, B, and C. The mass of each box is shown in the diagram, with Box A weighing 550 grams, Box B 5 grams, and Box C 50 grams. Box D, with 700 grams, has the most significant mass, making it the heaviest box in the set.

3) Since the question asks which box is "under" the box with a mass of 50 grams, we can refer to the diagram and see that Box C is positioned above Box D and Box B. Therefore, the only box that is under Box C is Box A. So, the answer is Box A, as it is positioned below Box C in the diagram.

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The complete question is:

1. Which statement best describes how energy can be harmful?

A A fire burns down a house.

B Electricity heats an oven.

C A lamp lights a house.

D An alarm clock wakes up a sleeping person.

2. The diagram below shows four boxes labeled A, B, C, and D. The mass of

each box is shown.

a) 550 grams

b) 5 grams

c) 50 grams

d) 700 grams

3. Which box is under the box with a mass of 50 grams?

a) box A

b) box B

c) box C

d) box D

Answer:

For 1hour whole milk feed = (60,000 /6 )Kg=10,000Kg

So that the flow rate of whole milk feed = 10,000 kg/hr

Mass of whole milk=10,000 kg

Mass of cream = x kg Mass of skim milk=(1-x) Mass balance equation is Whole milk= skim milk + cream 10,000kg=skim milk + x kg So, skim milk = (10,000-x) kg Material balance on fat is 10,000kg×0.04 = (10,000-x)×0.004 + x On solving the above equation we get the value of x So, x=361.44 kg So that the flow rate of cream = x= 361.44kg/hr and mass of skim milk= (10,000-x)=(10,000-361.44)kg = 9,638.56 kg So that the flow rate of skim milk = 9,638.56 kg/hr. for checking

(Whole milk) flow rate = (skim milk + cream) flow rate

10,000 kg/hr = (9,638.56 + 361.44) kg/hr 10,000 kg/hr = 10,000 kg/hr Hence it is proved.

Answer: 2

Explanation: Calcium has a +2 charge and PO4 has a -1 charge. When writing this expression, the charges are flipped; instead of Ca2(PO4), it's Ca(PO4)2.

Answer:

Anstree species was preserved as a fossil in the Arizona desert. The species is now extinct. its because we preserved it right so that mean even to it fell down its still alive for the simple reason that we dint ruin it

Answer:

yes

Explanation:

sedimentary rocks are erosion, weathering, dissolution, precipitation, and lithification

Sedimentary Rocks are layers of deposited dust,smaller rocks & particles. This means that yes Sedimentary rocks are formed from weathering,erosion & deposition.

I HOPE THIS HELPS <3 and good luck!

Balanced chemical equation for the given reaction is Ba(OH)₂(aq) + 2HNO₃(aq) → Ba(NO₃)₂(aq) + 2H₂O(l).

Balanced equations are those equation in which all entities are present in equal amount on the reactant side as well as on the product side of the chemical reaction.

Balanced chemical reaction will be represented as:

Ba(OH)₂(aq) + 2HNO₃(aq) → Ba(NO₃)₂(aq) + 2H₂O(l)

In the above reaction all entities are present in the equal amount on both side of the chemical reaction.

Hence balanced chemical equation is Ba(OH)₂(aq) + 2HNO₃(aq) → Ba(NO₃)₂(aq) + 2H₂O(l).

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Answer:

C

Explanation:

[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]

The Correct choice is A. H+ , F- and HF

Since HF is a weak acid, it behaves like an weak electrolyte in water. so, there is incomplete dissociation of HF in water. Therefore, there will be HF molecules present in the solution along with the ions ~