In terms of electrons, What do the arrows mean?

Answer:

C₄H₃N

Explanation:

To solve this question we must find the moles of each atom in order to find the empirical formula (Simplest ratio of atoms present in a molecule). With empirical formula and the molar mass of the compound we can find the molecular formula as follows:

Moles H:

91.5mg H * (1mmol / 1mg) =

91.5mmol H

Moles N:

424mg N * (1mmol / 14mg) =

30.286mmol N

The ratio of moles regard to moles N (The lower number of moles is:

H = 91.5mmolH / 30.286mmolN = 3.0

N = 30.286mmolN / 30.286mmolN = 1

empirical formula = CₓH₃N

The molar mass of this formula is:

12*x + 1*3 + 1*14 = 17g/mol

Solving for X:

12X + 17g/mol = 65g/mol

12X = 48g/mol

X = 4

There are 4 atoms of carbon and molecular formula is:

Answer:

A budget is an estimation of revenue and expenses over a specified future period of time and is usually compiled and re-evaluated on a periodic basis. Budgets can be made for a person, a group of people, a business, a government, or just about anything else that makes and spends money.

Answer:  Mafic rocks are dominated by plagioclase and pyroxene (even if you can't see them with the naked eye) and smaller amounts of olivine. Intermediate rocks are roughly even mixtures of felsic minerals (mainly plagioclase) and mafic minerals (mainly hornblende, pyroxene, and/or biotite). There is little or no quartz.

HOPE THIS HELPS

Answer:

Hello, Im Mack. Hope you're doing well. :)

Here is my Correct, custom answer for the lab Question, (I also took the same assignment and got a 100% score)

Explanation:

The heating of the sodium acetate solution made it change from super-saturated to un-saturated. Yet now that it cooled back to room temperature Im sure it is saturated. it wasn't able to disolve the excess sodium acetate left over at room temperature and had to be heated so now that it is back to room temperature I Think it will not disolve the sodium acetate left in the solution until it is heated again.    

Hope this helped you out,

Please feel free to comment for further help, and I'll reply asap.

Have a great day my friend :)

aluminium has bigger atomic size than chlorine

because atomic radii decreases across the period and increases down the group

this law would hold owing to the fact that chlorine and aluminum are on the same period

Answer:

39.2 g

Explanation:

2Ni₂O₃(s) ⟶ 4Ni(s) + 3O₂(g)

First we convert 55.3 g of Ni₂O₃ into moles, using its molar mass:

55.3 g ÷ 165.39 g/mol = 0.334 mol Ni₂O₃

Then we convert 0.334 Ni₂O₃ moles into Ni moles, using the stoichiometric coefficients of the balanced reaction:

0.334 mol Ni₂O₃ * [tex]\frac{4molNi}{2molNi_2O_3}[/tex] = 0.668 mol Ni

Finally we convert 0.668 Ni moles into grams, using its molar mass:

0.668 mol * 58.69 g/mol = 39.2 g

Answer:

3.12 x 25.6 = 79.9 g

Answer:

A) It's correctly written

B) 77%

C) 835 calories

Explanation:

A) From online sources, we have number of calories as follows;

Fats: 9 calories per gram

Protein; 4 calories per gram

Carbs; 4 calories per gram

Total calories for each;

Total fat = 3 × 9 = 27 calories

Total protein = 3 × 4 = 12 calories

Total carbs = 32 × 4 = 128 calories

(sugar and dietary Fibre are classified as carbohydrates and so total carbs takes care of their calories).

Thus, total number of calories per serving = 27 + 12 + 128 = 167 calories per serving which is same as what is given.

B) percent from carbohydrates per serving = total calories from carbs/total number of calories per serving × 100% = 128/167 × 100% ≈ 77%

C) One box contains 5 servings. Thus total number of calories per box = 167 × 5 = 835 calories

Given

Mass of NO - 824 g

Molar mass of NO - 30.01g/mol

No of moles of NO = Given mass/Molar mass

No of moles of NO = 824/30.01= 27.45 mole

Hence 27.5 moles of NO are formed!

Answer:

D

Explanation:

sound is produced when the matter vibrates

Answer:

D

Explanation:

the sound that is made is basically energy. This energy we call it vibration

Answer:

Explain

The Akautski is now assembled

The final temperature of the system can be calculated using calorimetric equation. The heat gained by water is equal to the heat lost by iron. Hence, the final temperature is 28 °C.

Calorimetry is an analytical tool used to determine the heat energy absorbed or released by a system. The calorimetric equation connecting the heat energy q with mass m, specific heat capacity c and temperature difference ΔT is given as:

q = m c ΔT

Here, the heat lost by iron = heat gained by water

m of iron = 255.15 g

initial temperature = 816 °C

c = 0.461 J/°C g.

Mass of water = 4000 g

c = 4.18 J/°C g

initial temperature = 23 °C

Let T be the final temperature of the system.

then,

0.461 J/°C g × 255.15 g × (816 - T) = 4.18J/°C g × 4000 g × (T - 23)

117.62 J(816 - T) = 16720 (T - 23)

T = 28°C.

Therefore, the final temperature of the system will be  28°C.

Find more on calorimetry:

https://brainly.com/question/11477213

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Mass of Calcium Carbonate = 500 grams

The required reaction would be:

CaCl₂ + Na₂CO₃ → CaCO₃ + 2NaCl

Number of moles of CaCO₃:

Number of moles = given mass / molar mass

Number of moles = 500 / 100              [molar mass of CaCO₃ = 100g/mol]

Number of moles = 5 moles

Using the power of stoichiometry!!!

CaCl₂ + Na₂CO₃ → CaCO₃ + 2NaCl

from the balanced reaction listed above, we can see that one mole of CaCl₂ and one mole of Na₂CO₃ produces one mole of CaCO₃

Moles of CaCl₂ = Moles of Na₂CO₃ = Moles of CaCO₃

we just solved for the number of moles of CaCO₃, which gives us

Moles of CaCl₂ = Moles of Na₂CO₃ = 5 moles

Hence, 5 moles of CaCl₂ and Na₂CO₃ each is required

We are given that the concentration of NaOH is 0.0003 M and are asked to calculate the pH

We know that NaOH dissociates by the following reaction:

NaOH → Na⁺ + OH⁻

Which means that one mole of NaOH produces one mole of OH⁻ ion, which is what we care about since the pH is affected only by the concentration of H⁺ and OH⁻ ions

Now that we know that one mole of NaOH produces one mole of OH⁻, 0.0003M NaOH will produce 0.0003M OH⁻

Concentration of OH⁻ (also written as [OH⁻]) = 3 * 10⁻⁴

pOH of the solution:

pOH = -log[OH⁻] = -log(3 * 10⁻⁴)

pOH = -0.477 + 4

pOH = 3.523

pH of the solution:

We know that the sum of pH and pOH of a solution is 14

pH + pOH = 14

pH + 3.523 = 14                              [subtracting 3.523 from both sides]

pH = 10.477                        

Answer:

Aspartic acid may be considered hydrophobic at physiological.

Answer:

josephmelichar

Explanation:

In the first step, 2 protons combine. In doing so one of the protons will convert into a neutron by losing a positron (positive electron) and a neutrino; this is also known as beta decay. This changes one of the protons (positive charge) into a neutron (neutral charge) and allows the two particles to combine.

Monounsaturated Fat 1g

Answer:

Have 2 filled orbitals and 3 partially filled orbitals.

Explanation:

Hello there!

In this case, according to the given information of the electron configuration for that particle; it is possible for us to infer it has 5 valence electrons, as the electrons on its outermost shell (2). Moreover, we undertand this particle needs three bonds, does not have neither the electron configuration of a noble gas which ends by p⁶ nor that of an alkali earth metal as it ends by s².

Therefore, we infer the correct answer is Have 2 filled orbitals and 3 partially filled orbitals because according to the Hund's rule, the s orbital is fulfilled and the p orbital has 1 electron orbital fulfilled and two partially filled orbitals.

Regards!

Answer:

The answer is A: (more below)

Liquid A: Neutral

Liquid B: Acid

Liquid C: Base

Explanation:

Ph scale: 1 - 6 are acids, 7 is neutral, 8 - 14 are bases.  

14

13

12

11

10

9

8

7

6

5

4

3

2

1

Answer:

c. composed of only one type of atom or molecule.

Explanation:

Pure substances are the substances that could be made up of only one type of particles and also it contains fixed structure. They would be further categorized as the elements & compounds. It is an elements that only consist of only one type of atom or molecule

Therefore as per the given situation, the option c is the answer

Answer: correct answer is C

Explanation:

Answer:I believe it is c.

Explanation:

Answer:

C., or "geothermal energy."

Option A is correct.

This is because atoms get compressed when the pressure increases and takes less space, on the other hand, the atoms get expanded when pressure decreases and hence take more space.

Answer:

Equation of Reaction

2AgNO3 + BaCl2 === 2AgCl + Ba(NO3)2

Molar Mass of AgNO3 = 170g/mol

Moles of reacting AgNO3 = 100g/170gmol-¹

=0.588moles of AgNO3

From the equation of reaction...2moles of AgNO3 reacts to Produce 2Moles of Silver Chloride

So Their ratio is 2:2.

This means that 0.588Moles of AgCl Will be produced too.

ANSWER...0.588MOLES OF AgCl WILL BE PRODUCED.

Answer:

20 moles of o2

5 moles=4moles

?moles=16moles

Answer:

1.9 L

Explanation:

Step 1: Given data

Step 2: Calculate the final volume of the gas

If we assume ideal behavior, we can calculate the final volume of the gas using the combined gas law.

P₁ × V₁ / T₁ = P₂ × V₂ / T₂

V₂ = P₁ × V₁ × T₂ / T₁ × P₂

V₂ = 1.5 atm × 3.0 L × 303 K / 293 K × 2.5 atm = 1.9 L

Answer:

89.3 mL

Explanation:

First we convert 20.0 °C and 54.0 °C to K:

With the absolute temperatures we can solve this problem by using Charles' law:

Where in this case:

We input the data:

And solve for V₂:

Answer:

A

Explanation:

Hydrogen isn't an alkali metal

Answer:

hydrogen

Explanation:

hydrogen is a gas not a metal

Answer:

The answers are in the explanation.

Explanation:

1. Commutative property: The order of the numbers does not affect the result:

6 + 5 = 5 + 6

2. Associative property: In add or multiply, you can operate regardless of how the numbers are grouped.

(9×2)×4=9×(2×4)

3. Associative property:

(1 x 4) x 0 = 1 x (4x 0 )

4. Commutative property:

17 + 19 = 19 + 17

5. Associative property:

(13+6)+7=13+(6+7)