can u pls help me with this question ​

Answer:

44

Explanation:

Answer:

C

Explanation:

Condensation

Answer:

C....... ...................

Answer:

B is the answer because it doesn't matches the num of valence electrons

Answer:

No, because it doesn't match the total number of valence electrons.

Explanation:

The total valence electrons should be 10. But if you add all the valence electrons it gives you 12

Answer:

we use atom in our sentences all the time

Explanation:

that what i put

Answer:

The International System of Units (SI) is originated in France by frenches and originally was called a metric system of measurements. It provides definitions of various units of measurement such as weight, distance, electric current, temperature, and others which is widely accepted in the different fields of science and technology.

It is the system that is extended and derived from the french metric system of measurement is accepted in 1960 by convention 44 nation of the world to use particular unit of measurement worldwide to avoid confusion.

Answer:

Each donor gave away more than one organ.​

Explanation:

edge 2021

Answer: D

Explanation:

Answer:

Explanation:

12.9 micrograms of iodine in both

Answer:

2.35

Explanation:

A 1.00-L flask was filled with 2.00 moles of gaseous SO₂ and 2.00 moles of gaseous NO₂ and heated. After equilibrium was reached, it was found that 1.21 moles of gaseous NO was present. Assume that the reaction

SO₂ + NO₂ ⇌ SO₃ + NO

occurs under these conditions. Calculate the value of the equilibrium constant, K, for this reaction.

Step 1: Calculate the molar concentrations

Since the reaction takes place in a 1.00 L flask, the molar concentrations are:

[SO₂]i = 2.00 M

[NO₂]i = 2.00 M

[NO]eq = 1.21 M

Step 2: Make an ICE chart

        SO₂ + NO₂ ⇌ SO₃ + NO

I       2.00   2.00       0        0

C        -x       -x         +x       +x

E    2.00-x  2.00-x    x         x

Step 3: Calculate the concentrations at equilibrium

The concentration of NO at equilibrium is 1.21 M. Then, x = 1.21.

[SO₂]eq = 2.00-1.21 = 0.79 M

[NO₂]eq = 2.00-1.21 = 0.79 M

[SO₃]eq = x = 1.21 M

[NO]eq = x = 1.21 M

Step 4: Calculate the value of the equilibrium constant, K, for this reaction

K = [SO₃] × [NO]/[SO₂] × [NO₂]

K = 1.21²/0.79² = 2.35

Answer:

0.595 M

Explanation:

The number of moles of water in 1L = 1000g/18g/mol = 55.6 moles of water.

Mole fraction = number of moles of KNO3/number of moles of KNO3 + number of moles of water

0.0194 = x/x + 55.6

0.0194(x + 55.6) = x

0.0194x + 1.08 = x

x - 0.0194x = 1.08

0.9806x= 1.08

x= 1.08/0.9806

x= 1.1 moles of KNO3

Mole fraction of water= 55.6/1.1 + 55.6 = 0.981

If

xA= mole fraction of solvent

xB= mole fraction of solute

nA= number of moles of solvent

nB = number of moles of solute

MA= molar mass of solvent

MB = molar mass of solute

d= density of solution

Molarity = xBd × 1000/xAMA ×xBMB

Molarity= 0.0194 × 1.0627 × 1000/0.981 × 18 × 0.0194×101

Molarity= 20.6/34.6

Molarity of KNO3= 0.595 M

Answer:

C) 2, 4.

Explanation:

Hello!

In this case, since the sulfur atom has six electrons at its outer shell, it suggests it needs to gain two electrons in order to attain a complete octet, that is why it has 2 paired electrons.

Moreover, since two electrons are paired, then 4 electrons will remain unpaired; therefore the answer would be C) 2, 4.

Best regards!

Answer:

mass of silver chloride (AgCl) = 3.0135  grams

Explanation:

The chemical equation is:

[tex]AgNO_{3(aq)} + NaCl_{(aq)} \to AgCl_{(s)} + NaNo_3_{aq)}[/tex]

No. of mole  = molarity × volume

For AgNO3:

No. of moles = 1.00 × 0.055

= 0.055 moles

No. of moles of NaCl = 0.84 × 0.025

= 0.021 moles

From the equation:

[tex]1 \ mol e \ of \ AgNO_3 \ react \ with \ 1 \ mole \ o f \ NaCl[/tex]

Therefore, 0.055 moles of AgNO3 react with 0.055 moles of NaCl

Here;

NaCl serves as the limiting reactant

Thus,

1 mole of NaCl will react with AgNO3 to yield 1 mole of AgCl

∴

0.021 moles of NaCl react with AgNO3 to yield 0.021 moles og AgCl

mass of AgCl = no of moles × molar mass

= 0.021 × 143.5

= 3.0135  grams

Answer:B. One that occurs on its own

Explanation:

Answer:

The molecular formula of the compound is C₂H₄F₂ or CH₃CHF₂

Explanation:

From the question given above, the following data were obtained:

Empirical formula of the compound = CH₂F

Fórmula mass of compound = 66 g/mol

Molecular formula of the compound =?

The molecular formula of the compound can be obtained as follow:

Molecular formula = [Empirical formula]ₙ

Molecular formula = [CH₂F]ₙ

[CH₂F]ₙ = 66

[12 + (2×1) + 19] n = 66

[12 + 2+ 19]n = 66

33n = 66

Divide both side by 33

n = 66/33

n = 2

Molecular formula = [CH₂F]ₙ

Molecular formula = [CH₂F]₂

Molecular formula = C₂H₄F₂

Thus, the molecular formula of the compound is C₂H₄F₂ or CH₃CHF₂

Answer:

125.4 kilopascals

Explanation:

wkdje

Answer:

125,400 pa = 125.4 kPa

Explanation:

1 pa = 0.001 kPa

&

1 kPa = 1,000 pa

Answer:

I don't know what question 5's conclusion is but if i were to take a guess here i would say wide leaves with a high surface area

Explanation:

to soak up water and maybe provide shade for the roots and dirt under the plant.

6.68 g MgSO₄

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Aqueous Solutions

Atomic Structure

Step 1: Define

0.965 L

0.0575 M

Step 2: Identify Conversions

Molar Mass of Mg - 24.31 g/mol

Molar Mass of S - 32.07 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of MgSO₄ - 24.31 + 32.07 + 4(16.00) = 120.38 g/mol

Step 3: Find MgSO₄

Step 4: Convert

[tex]\displaystyle 0.055488 \ mol \ MgSO_4(\frac{120.38 \ g \ MgSO_4}{1 \ mol \ MgSO_4} )[/tex] = 6.67959 g MgSO₄

Step 5: Check

We are given 3 sig figs as our lowest. Follow sig fig rules and round.

6.67959 g MgSO₄ ≈ 6.68 g MgSO₄

Answer:

Answer is True

I hope its help for you

have a great day

Answer:

[NH₃] = 14.7 mol/L

Explanation:

28 wt% is a type of concentration that indicates that 28 g of ammonia is contained in 100 g of solution.

Let's determine the amount of ammonia:

28 g . 1 mol / 17.03g = 1.64 moles of NH₃

You need to consider that, when you have density's data it is always referred to solution:

Mass of solution is 100 g, let's find out the volume

0.90 g/mL = 100 g /V

V = 100 g / 0.90mL/g → 111.1 mL

We convert the volume to L → 111.1 mL . 1 L/1000mL = 0.1111 L

mol/L = 1.64 mol/0.1111L → 14.7 M

mol/L = M → molarity a sort of concentration that indicates the moles of solute in 1L of solution

Answer:

The transfer was essential to understand the mutation and the possibility of new, more resistant strains in microorganisms.

Explanation:

the transfer of microorganisms is based on the transfer of genetic data through conductive pathways that penetrate the membranes, called pili or genetic bridges.

These mutated genes with higher resistance are transmitted and resistance is generated in entire populations and even species.

Answer:

Chemical is best answer

Explanation:

Mark me as brilliant and thank you

Please

Answer:

chemical is the  answer

Explanation:

Answer: 5.4

Explanation: The Law of Impenetrability says that two objects can't occupy the same space at the same time; therefore, the pennies and the water can't occupy the same space at the same time. Without the pennies the water level read 20.6 mL, dropping in the pennies gives a level of 26.0.

A liquid, solid, or gas's volume is the amount of three-dimensional space it occupies. Volume in mL of the stack of 15 pennies is  26.0 mL.

A liquid, solid, or gas's volume is the amount of three-dimensional space it occupies. Although there are many different units that may be used to indicate volume, the most common ones are litres, m³, gallons, milliliters, teaspoon, as well as ounces.

Due to the Law of Impenetrability, which states that two items cannot occupy the same place at the same time, neither can pennies nor water. When the pennies are added, the water level rises to 26.0 mL from 20.6 mL before.

Mass is the quantity of matter a material contains, whereas volume is indeed the space that it occupies. The density of a sample is the quantity of mass in a given volume.

Therefore, volume in mL of the stack of 15 pennies is  26.0 mL.

To learn more about volume, here:

https://brainly.com/question/23477586

#SPJ6

Answer:

It is A.

Explanation:

found at ground

hope this helps

Answer:

I think the answer is b

Explanation:

the paragraph states, that it is an experiment to see if there is any oxygen in the water

Answer: D.

Explanation: :)

Answer:

d

Explanation:

Answer:

wave

Explanation:

Answer:

In static electricity the charges are at rest and they are accumulating on the surface of the insulator. Whereas in current electricity the electrons are moving inside the conductor.

Answer: Current electricity involves a flow of electrons; static electricity involves a single transfer of electrons.

Explanation:

hopes this helps

Answer:

Discovered two new radioactive elements They came up with the term radio activity.conducted experiments with uranium-containing

Explanation:

Answer:

rare username has joined the meeting.

Explanation:

Answer: 4.1 g of barium precipitated.

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.

To calculate the moles, we use the equation:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar Mass}}[/tex]

Given : moles of barium = 0.030

Molar mass of barium = 137 g/mol

[tex]0.030=\frac{x}{137}[/tex]

x= 4.1 g

Thus there are 4.1 g of barium that precipitated.