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Answer:

To make 500 ml, you need 5x this amount. 5 x 4.33 g = 17.21 g glucose in a final volume of 500 ml

Explanation:

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The mass of the water that will be needed to change its temperature by 25°C is :  43.33 grams

Given data :

Energy = 4532 J

Change in temperature = 25°C

Cw = 4.184 J/gk

We will apply the formula below

Q = mCwΔt  ---- (1 )

4532 = m * 4.184 * 25

therefore :

m = 4532 / 104.6

   = 43.33 grams

Hence we can conclude that the mass of water needed to change the temperature by 25°C is 43.33 grams

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Explanation:

Specific heat capacity of water is 1cal/g/∘C. 1 cal heat is required to increase the temperature of 1 g of water by 1∘C. To increase the temperature of 10 g water by 1∘C, 10 calories of heat is required

The rate of reaction between zinc and either HCl or HI will be highest in the 2.0 M solutions since they had the highest concentrations.

The rate of a reaction increases with increase in concentration of the reactants and decreases with decrease in concentration of the reactants.

The solutions of the HCl and HI that has the highest are those with concentrations of 2.0 M.

Therefore, the rate of reaction between zinc and either HCl or HI will be highest in the 2.9l0 M solutions.

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Answer:

Structure of boron trifluoride, an example of a molecule with trigonal planar geometry.

Explanation:

Answer:

As Per Provided Information

Given temperature is 375K

We have been asked to find the temperature in Celcius .

[tex] \boxed{\bf \: {}^{ \circ}C =Given \: Temperature \: in \: k \: - 273}[/tex]

Substituting the given value in above equation and let's solve it

[tex] \qquad \longrightarrow\sf \: {}^{ \circ}C = \: 375 - 273 \\ \\ \\ \qquad \longrightarrow\sf \: {}^{ \circ}C = \: 102[/tex]

Therefore,

So, your answer is d) 102°C

The average resting heart rate is between is 70- 75 bytes per minute. This include systolic pressure and diastolic pressure. Hence, option D is correct.

The count of heart beats per unit time is called heart rate.  For a normal condition at the resting time the average heart rate is 70 -75 beats per minute.

The heat beats we hear is the impulse from the open and closing of the heart valves. This includes the systolic and diastolic blood pressures. For a normal person at the systolic rate is 120 mm Hg and diastolic rate is 80 mm Hg.

The blood pressure rate is depends on the diet, inheritance and other factors such as age, physical activities, mental situations etc. For a normal person, the average resting heart rate is 70 - 75 bpm.

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Answer:

Citric acid is a weak organic acid found in citrus fruits.

Explanation:

Answer:

A) As the initial concentration of H₂ is increased, the reaction rate also increases.

B) Yes, [H₂] is part of the rate law.

Explanation:

For the reaction:

[tex]\displaystyle \text{H$_2$}_\text{(g)} + 2\text{NO}_\text{(g)} \longrightarrow \text{H$_2$O}_\tex{(g)} + \text{N$_2$O}_\text{(g)}[/tex]

The rate law will have the form:

[tex]\displaystyle \text{Rate} = k\left[\text{H$_2$}\right]^n\left[\text{NO}\right]^m[/tex]

Where n and m are the respective order of reactions.

From the table, we can see that as the concentration of H₂ increases, the instantaneous rate also increases.

Therefore, [H₂] is indeed part of the rate law. If it isn't, changing its concentration will have no effect on the instantaneous rate of the reaction.

Answer:

through Decantation

Explanation:

Decantation: Decantation is pouring out of upper clear layer of liquid into another container to separate two immiscible liquids or to separate different substances in a suspension mixture.

Therefore, we could use decantation once the sand particles settle down by gently pouring the water into another container. Once the water is transfered, we'll be left with sand in the bottom of the first container.

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The following solutions are electrolytes/non electrolytes;

An electrolyte is a substance that conducts electricity in solution. An electroyte must be able to dissociate into ions. It is these ions that are the charge carriers in solution.

Now let us define which of these are electrolytes;

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Answer:

A B A

Explanation:

The volume of the stock solution that has a concentration of 1.5 M SO2 and is diluted to a 0.54 M solution with a volume of 0.18 L is 0.065L.

The concentration of a solution can be calculated using the following formula:

C1V1 = C2V2

Where;

1.5 × V1 = 0.54 × 0.18

1.5V1 = 0.0972

V1 = 0.0972 ÷ 1.5

V1 = 0.065L

Therefore, the volume of the stock solution that has a concentration of 1.5 M SO2 and is diluted to a 0.54 M solution with a volume of 0.18 L is 0.065L.

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"I'll win everyone at the camp games this year."

Explanation:

This above statement is an example of competition because it signifies a matter anticipating an upper hand towards some other matter.

Answer:

When an acid reacts with a metal, what is one of the usual products?

C) Hydrogen gas

Explanation:

Answer:

Mass is the quantity of matter in a physical body.

Explanation:

mass bro

Answer:

a coherent, typically large body of matter with no definite shape.

Explanation:

a mass of curly hair

1143.4grams of solute are needed to make 2.50L of a 1.75M solution of Ba(NO3)2. Details about molarity can be found below.

The mass of a substance can be calculated by multiplying the number of moles by its molar mass.

However, the number of moles can be calculated by using the following formula:

Molarity = no of moles ÷ volume

no of moles = 1.75 × 2.5

no of moles = 4.38mol

molar mass of Ba(NO3)2 = 261.34g/mol

mass of Ba(NO3)2 = 261.34 × 4.38

mass of Ba(NO3)2 = 1143.4grams.

Therefore, 1143.4grams of solute are needed to make 2.50L of a 1.75M solution of Ba(NO3)2.

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Taking into account the definition of dilution, 16.67 mL of 12 M hydrochloric acid is needed to prepare 100. mL of a 2.0M solution.

When it is desired to prepare a less concentrated solution from a more concentrated one, it is called dilution.

Dilution is the process of reducing the concentration of solute in solution, which is accomplished by simply adding more solvent to the solution at the same amount of solute.

In a dilution the amount of solute does not change, but as more solvent is added, the concentration of the solute decreases, as the volume (and weight) of the solution increases.

A dilution is mathematically expressed as:

Ci×Vi = Cf×Vf

where

In this case, you know:

Replacing in the definition of dilution:

12 M× Vi = 2 M× 100 mL

Solving:

Vi = (2 M× 100 mL)÷ 12 M

Vi= 16.67 mL

In summary, 16.67 mL of 12 M hydrochloric acid is needed to prepare 100. mL of a 2.0M solution.

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Answer:

68g

Explanation:

GMM of NH^3=14+3=17g

Mass =mole×GMM=4×17=68g

hope this helps<33 :)

Explanation:

Step 1: Write the balanced "molecular" equation:

[tex]2HI(aq) + NIS (s) → NiI₂(aq) + H₂S(g)[/tex]

Step 2: H₂S is written in molecular form. Consult the solubility and net ionic equation rules on the information page to determine which of the other substances will dissociate:

[tex]2HI(aq) + NIS (s) → NiI₂(aq) + H₂S(g)[/tex]

yes no yes

Step 3: Dissociate all soluble salts, strong acids, and strong bases (except calcium hydroxide). Leave together all "not soluble" salts and weak acids or bases:

[tex] {2H₃O}^{ + } (aq) + {2I}^{ - } (aq) + NiS(s)→ { Ni}^{2 + }(aq) + {2I}^{ - }(aq) + H₂S(g) + 2H₂O(l)[/tex]

Step 4: Cross out "spectator ions" that appear on both sides of the reaction (these ions do not participate in the chemistry) and rewrite the "net" reaction using the smallest possible coefficients:

[tex] {2H₃O}^{ + } (aq) + NiS(s) → { Ni}^{2 + } (aq) + H₂S(g) + 2H₂O(l)[/tex]

Answer:

Actual yield is 38.57

Explanation:

Percentage yield = Actual yield / theoretical yield X 100

Percent yield x theoretical yield / 100 = actual yield

Write the balanced chemical equation:

2Na + CI2 = 2NaCI

Given is 17.25 g Sodium metal (limiting reactant) with excess being chlorine gas

Percent yield is 88%

Mole of Na = 17.25 g / 22.98 = 0.750

Calculate the Theoretical Yield to solve for Actual Yield

Theoretical yield = 0.75 x molar mass of NaCI

Theoretical yield = 0.75 x 58.44 = 43.83 g

When plugged into the original percentage yield formula:

Actual yield = 88 x 43.83 / 100 = 38.57 g

Answer:

The metals of the group are called halogens.

Explanation:

hope it works if not im very sorry for wasting ur time :)

Answer: No, two atoms belonging to the same chemical element are not necessarily identical.

Explanation:

I hope that was helpful

Answer:

She turned back at the point at which she forgot she left her briefcase. If this isn't the correct answer, please be more specific in the question.

Explanation:

Answer:

6.6 L    ( if you wrote your Q correctly)

Explanation:

2 Al    + 1 N2   = 2 Al N

Al mole weight = 26.981 gm

   given 15.9 Al    How many L of N2 are needed?

15.9 / 26.981 = .5893 moles of Al

   we need 1/2 as many moles of N2  ( from the balanced equation above)

       = .29465  moles of N2

  22.4 L/ mole   for STP gas = 6.6 L

(1) The number of moles of nitrogen trihydride produced is 3.63 moles.

(2) The molar ratio not represented is 2 moles of N₂ = 3 moles of NH₃.

The balanced chemical reaction of Nitrogen and hydrogen is given in the equation below;

N₂ + 3H₂ → 2NH₃

From equation above;

3 moles of H₂ --------------------> 2 moles of NH₃

5.45 moles of H₂ ----------------> ? moles of NH₃

= (5.45 x 2) / 3

= 3.63 moles of NH₃

From the equation above, we have the following molar ratios

Thus, the only molar ratio not represented in the balanced chemical equation of Nitrogen and hydrogen gas is 2 moles of N₂ = 3 moles of NH₃.

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Answer:Evolution

Evolution is the process by which populations of organisms change over generations. … If a trait is advantageous and helps the individual survive and reproduce, the genetic variation is more likely to be passed to the next generation (a process known as natural selection).

[tex]\text{pH} = -\log[H^{+}] = - \log[4,5 \times 10^{-6}] = 5.34[/tex]