What is the percent by mass of magnesium in a 1000 g sample of ocean water (solution) that has 1.36 g of magnesium ions?

Answers

Answer 1

Answer:

So the percentage mass of Magnesium in ocean water is 0.13%.

Explanation:

brainliest pls


Related Questions

write a story of your life when you were hurted by someone whom you trusted blindly...​

Answers

Answer:

Sis I think it happened with me but I am not able to remember if u want u can share if it happened with u

cómo se puede comprobar el efecto universo​

Answers

Answer:

???! huhhhjhhh no I speak English

Explanation:

?

Answer:

vifucivud UKvi uiiijhhh

Which hand is negatively changed?

A.
B.
C.
D.

Answers

Answer:

I think B

Explanation:

There are more negative ions than positive ions


True or False: A higher vapor pressure (evaporates easily) corresponds to strong intermolecular forces.

Answers

the answer prob false

For each event stated below, indicate how the concentration of each species in the chemical equation will then change to reach equilibrium.

2CO(g) + O2(g) ⇌ 2CO2(g)

a. increasing the concentration of CO
b. decreasing the amount of O2
c. decreasing the the volume of the system

Answers

Answer:

See Explanation

Explanation:

When a constraint such as a change in temperature, concentration or pressure is imposed on a reaction system in equilibrium, the system will readjust itself in such a way as to annul the constraint. This readjustment occurs when the equilibrium position shifts towards the left or right in order to annul the constraint.

a. increasing the concentration of CO: When the concentration of CO is increased, the equilibrium position shifts to the right in order to annul the constraint. This means that more CO2 is produced in the system while the concentration of CO and O2 are decreased until equilibrium is reestablished.

b. decreasing the amount of O2: When the amount of O2 is decreased, the equilibrium position will shift to the left and more CO and O2 are produced while the concentration of CO2 decreases until equilibrium is reestablished.

c. decreasing the the volume of the system: When the volume of the system is decreased, the equilibrium position shifts towards the right hand side where there is less total volume. Hence the concentration of CO and O2 decreases while the concentration of CO2 increases.

156 grams of calcium fluoride, CaF2, is dissolved in 2000 mL of solution. Determine the molarity (M).

Answers

Answer:

1 M

Explanation:

We'll begin by calculating the number of mole of in 156 g of CaF₂. This can be obtained as follow:

Mass of CaF₂ = 156 g

Molar mass of CaF₂ = 40 + (19×2)

= 40 + 38

= 78 g/mol

Mole of CaF₂ =?

Mole = mass /molar mass

Mole of CaF₂ = 156 / 78

Mole of CaF₂ = 2 moles

Next, we shall convert 2000 mL to L. This can be obtained as follow:

1000 mL = 1 L

Therefore,

2000 mL = 2000 mL × 1 L / 1000 mL

2000 mL = 2 L

Finally, we shall determine the molarity of the solution. This can be obtained as follow:

Mole of CaF₂ = 2 moles

Volume = 2 L

Molarity =?

Molarity = mole / Volume

Molarity = 2 / 2

Molarity = 1 M

Thus, the molarity of the solution is 1 M


Find the % composition for each element in Zinc Chlorate

Answers

Answer:

chlorine ~ 30%

zinc ~ 28%

oxygen ~ 41%

Explanation:

Draw a schematic diagram of a circuit with an output device, a energy source and a controller.

Answers

Answer:

ch∪pαpi munαn0?

Explanation:

A chemistry student weighs out 0.021 kg of an unknown solid compound X and adds it to 650. mL of distilled water at 30. 0C. After 10 minutes of stirring, all of the X has dissolved. Just to be sure, the student adds a further 11. mg of X to the solution, and it, too, dissolves. Using only the information above, can you calculate the solubility of X in water at 30. 0C?

Answers

Answer:

"No" I can't calculate the solubility of X.

Explanation:

Beyond certain temperatures or heat levels, a solvent's soluble has been determined by many as the proportion of something like the solution necessary for saturating the solvents' measured amount at around that atmospheric pressure.This same solution isn't absorbed throughout this situation. It is not saturated however since the addition of 11 g of something like the mixture towards the solution completely dissolved without separating a solution.

This is why the preceding solution would be the proper one.

Consider the energy diagram below.
AY
B
Free Energy
Reaction Progression
Which line indicates a higher reaction rate?
A because it has a lower activation energy.
B because it has a lower activation energy.

Answers

It is A because it has a lower activation emery than like B

Answer:

B because it has a lower activation energy.

Explanation:

Just took the test

Answer both of these true or false correctly

brainliest if correct

Answers

Answer:

There both true.

Explanation:

Hope this helps

Answer:

The first one is True

The second one is false

Explanation:

Which statement would indicate the presence of an acid?
It tastes bitter..
It does not react with active metals.
It reacts with active metals to form a gas.
It does not change the color of litmus paper

Answers

Hey, it would not chnage the color and it wouldn’t react with metals so it’s between those two options. Sorry, I don’t want to say something and it’s my wrong. That’s my best guest .

Answer:

hey the answer is that it reacts with active metals to form a gas.

Explanation:

sorry i know this is late

How many different chlorinated products
are based in the following reaction.
CH3CH2CH2CH3 + Cl2 heat

Answers

Answer: if I’m not mistaken it would be 8

Explanation:

Answer:

2

Explanation:

:)

What is (aq),(I), and (g) mean in H2O2(aq) -> H2O(l) + O2(g) and why is it nesesary to have (aq),(I), and (g)

Answers

Explanation:

A matter can be present in different states like solid, liquid or gas. When we write a chemical equation then states of species involved are also mentioned.

This is because it tells in what state the reactants were present and in what state the products are then formed.

For example, [tex]H_{2}O_{2}(aq) \rightarrow H_{2}O(l) + O_{2}(g)[/tex]

Now here, (aq) means aqueous, (l) means liquid and (g) means gas.

So, these states denoted are necessary as it tells that [tex]H_{2}O_{2}[/tex] in aqueous state dissociates to give [tex]H_{2}O[/tex] in liquid state and [tex]O_{2}[/tex] in gaseous state.

is this correct im just asking because my little brother not sure for his answer ​

Answers

I think it’s not right

If you have 600g of nitroglycerin, how many moles do you have?

help please

Answers

Answer:

600

Explanation:

there's 1 mole in every nitroglycerin

I think

If you have 1.82 moles of mercury (Hg), how many grams of mercury do you have?

Answers

Answer:

182

Explanation:

1 hectogram (hg) = 100 grams (g)

1.82 x 100 = 182

pls help i need asap will mark brainlest

Answers

Answer:

B. 50%

Explanation:

2H₂ + CO → CH₃OH

First we convert the given masses of the reactants into moles, using their respective molar masses:

4 g H₂ ÷ 2 g/mol = 2 mol H₂25 g CO ÷ 28 g/mol = 0.893 mol CO

0.893 moles of CO would react completely with (0.893 * 2) 1.786 moles of H₂. As there are more H₂ moles than that, H₂ is the reactant in excess and CO is the limiting reactant.

Now we calculate how many CH₃OH moles would have been formed if all CO would have been consumed:

0.893 mol CO * [tex]\frac{1molCH_3OH}{1molCO}[/tex] = 0.893 mol CH₃OH

Then we convert 0.893 moles of CH₃OH into grams, using its molar mass:

0.893 mol CH₃OH * 32 g/mol = 28.57 g

Finally we calculate the percent yield:

14 g / 28.57 g * 100% = 49%

Products will form faster if___
A) temperature is decreased
B) the reaction is not stirred
C) the particle size of the reactants are larger
D) concentration of the reactants are increased

Answers

Answer:

C(btw this could be wrong)

Explanation:

Answer:

B is the answer

Explanation:

the mass concentration the mass concentration for a solution containing 45 g of calcium carbonate is 100 cm3 ​

Answers

Answer: The mass concentration for a solution containing 45 g of calcium carbonate for 100 [tex]cm^{3}[/tex] is 0.045 M.

Explanation:

Given: Mass of calcium carbonate = 45 g

Volume = [tex]100 cm^{3}[/tex]

Convert [tex]cm^{3}[/tex] into L as follows.

[tex]1 cm^{3} = 0.001 L\\100 cm^{3} = 100 cm^{3} \times \frac{0.001 L}{1 cm^{3}}\\= 0.1 L[/tex]

Moles of calcium carbonate (molar mass = 100 g/mol) is as follows.

[tex]No. of moles = \frac{45 g}{100 g/mol}\\= 0.45 mol[/tex]

Molarity is the number of moles of solute present in a liter of solution.

Hence, molarity (or mass concentration) of given solution is calculated as follows.

[tex]Molarity = \frac{no. of moles}{Volume (in L)}\\= \frac{0.45 mol}{0.1 L}\\= 0.045 M[/tex]

Thus, we can conclude that the mass concentration for a solution containing 45 g of calcium carbonate for 100 [tex]cm^{3}[/tex] is 0.045 M.

7. What is the mass of a piece of copper (Cu) that undergoes a 25.0 °C
temperature change with the loss of 428 J of energy?

Answers

Answer:

0.0428 kg or 42.8 g

Explanation:

Applying,

Q = cmΔt.............. Equation 1

Where Q = heat lost of heat gained, c = specific heat capacity of copper, m = mass of copper, Δt = temperature change.

make m the subject of the equation above

m = Q/cΔt.................. Equation 2

From the question,

Given: Q = 428 J, Δt = 25 °C

Constant: c = 400 J/kg.°C

Substitute these values into equation 2

m = 428/(25×400)

m = 0.0428 kg

m = 42.8 g

2) Choose the best answer. Which type of reaction is this? NaOH + H2O → Na+ + OH strong base dissociation strong acid dissociation weak base dissociation neutralization weak acide dissociation​

Answers

Answer:

strong Base Dissociation

Explanation:

NaOH is baseNaOH is strong base that means strong acids ionizes almost completely when dissolved in water.

Place the following in order of increasing entropy at 298 K.
Ne Xe He Ar Kr
A) He < Kr < Ne < Ar < Xe.
B) Xe < Kr < Ar < Ne < He.
C) Ar < He < Ar < Ne < Kr.
D) Ar < Ne < Xe < Kr < He.
E) He < Ne < Ar < Kr < Xe.

Answers

Answer:

E

Explanation:

The simple rule of thumb is that as the atomic or molar mass of an atom increases, the entropy increases. This means that more the mass more will be entropy.

The atomic mass of various elements is as follows

Ne = 20 g/mol

Xe = 131 g/mol

He = 4 g/mol

Ar = 40 g/mol

Kr = 84 g/mol

Therefore, the order of increasing entropy must be

He<Ne<Ar<Kr<Xe.

Hence, option E is the correct answer.

ACTIVITY NO.3
DIRECTIONS: Read each item carefully. Choose the letter of your answer.
1. Light travels in a
line when is passes through a single medium.
a. curve
b. straight
C. crooked
d. dotted
2. When the sound travels through solids, the vibration of the particles occurs
?
a. fast
b. slowly
c. moderately
irregularly
3. What affects the speed of sound as it travels?
a. Person receiving it
b. The origin of the sound
c. The nature of materials
d. Loudness of the sound
4. How is heart transferred in solid materials?
a. Through convection
b. Through conduction
c. Through radiation
d. Through vacuum
5. What is the direction of heat transfer?
a. From hot to cold
b. From Cold to hot
c. From bottom to top
d. From side to side​

Answers

Be more specific I just need points

[H] = 1.00 x 10^-7 M

a. Acidic
b. Basic
c. Neutral

Answers

the answer would be A

How do we measure the rate of this reaction A + B —> C

Answers

⟰ ANSWER ⟰

U R ANS IS IN THE PIC

HOPE IT HELPS U !!!!! (:

Which particles appear in equal numbers in all uncharged atoms? Proton, Neutron, Electron, None

Answers

Answer:

In an uncharged atom, the number of protons is always equal to the number of electrons. Apr 24, 2017

Explanation:

Neutron: An uncharged particle found in the nucleus of an atom.

There is only one stable atom that does not have neutrons. It is an isotope of the element hydrogen called protium. Protium, which contains a single proton and a single electron, is the simplest atom.


In the lab, you are asked to plan an investigation that shows how the structure of substances can explain the strength of the electrical forces between
particles. To show this, you decide to determine how much tinfoil will melt when the heat of different objects touches it. One of the objects you test
releases 5.7 kJ of heat. How much of the tinfoil will melt?
AHjus=7.029 kJ/mol
O
A. 16.99
B. 20.89
C. 84.39
D. 96.39

Answers

So the lab kk 14 klmo is 3737

PLZ ANSWER QUICK I AM IN TIMER HELP WILL GIVE BRAINLIEST
Which is greater, the moon's period of rotation or its period of revolution?

They are equal.

the moon's revolution period around Earth

Neither are known.

the moon's rotational period

Answers

Answer:

B

Explanation:

Which of the following does NOT represent a balanced reaction? ​

Answers

Answer:

letter D i think

Explanation:

correct me if im wrong

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