Please calculate the net forces acting on the object. 1 point for the correct 2 points
answer, and 1 point for the correct unit.*
2N
12N

Answer:

0.246M

Explanation:

0.123M x 2 = 0.246M

Due to Sr(OH)2  has the coefficient of 2.

The [OH⁻] concentration for 0.123 M Sr(OH)₂  solution at 25°C  is 0.246M

The amount of a solution's solute to either the solvent or the entire solution is called Concentration.

The most common way to express concentration is in terms of mass per unit volume.

The solute concentration, on the other hand, can be expressed in moles or units of volume.

We assume

Sr(OH)2 is a strong base, such that

Sr(OH)₂(s) + H₂O(l) −−−→Sr²⁺(aq)+2OH⁻aq)

The [OH⁻] concentration for 0.123 M Sr(OH)₂  solution at 25°C

= 2 * 0.123

= 0.246 M

As two  [OH⁻] are being produced by Sr(OH)₂ .

The [OH⁻] concentration for 0.123 M Sr(OH)₂  solution at 25°C  is 0.246M.

To know more about Concentration

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Answer: sea, more

I hope this helps

There are 2 molecules of Carbon dioxide(CO2)

Given

Molecules of CO2

Required

The number of molecules

Solution

The coefficient of a molecule shows the number of that molecule, while the subscript after the name of the atom indicates the number of that atom in the molecule

Because there is a coefficient of 2 in front of the CO2 molecule, then the number of CO2 molecules is 2

Answer:

the answer is none of the above

Answer:

See explanation

Explanation:

The elements in group 1A are soft metals that are highly electro positive. They are univalent and have the general outermost electron configuration of ns1.

They tarnish upon exposure to the atmosphere and most of them catch fire when they are dropped in water.

They form basic oxides which react with acids to form salt and water. Their trioxonitarate (V) decomposes with difficulty to yield dioxonitrate III and oxygen.

The ease of formation of univalent positive ions increases down the group. The atomic and ionic sizes also increases down the group.

The  melting and boiling points of group 1 elements decrease down the group. They most form ionic compounds of high melting and boiling points.

Answer:

try to calcutlae on paper

Explanation:

try to calculate on paper

Answer:

Solution : When sodium hydrogen carbonate is added to acetic acid then carbon dioxide (CO2) gas is evolved. CO2 trun s lime water milky it is a non supporter of combustion and is absorbed by strong alkalies like NaOH. Sodium hydrogen carbonate when added to acetic acid evolves a gas.

Explanation:

Chemically the ethanoic acid reacts with the sodium hydrogen carbonate to form carbon dioxide gas and water. The carbon dioxide gas produced rushes away from the water. This is seen as bubbles.

Answer:

Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.

Explanation:

Answer:

a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.

Explanation:

Here's an example. When you burn wood, It releases Carbon dioxide, water vapor, and ashes. It just depends what chemicals you use ^^

Answer: ABC&AMN are congruent by ASA comgruence

angle A=A

sideAN=AB

angle M=C

Explanation:

Answer:B

Explanation:

Cl₂0₅ + H₂O → 2HCIO₃

2Fe(OH)₃ → Fe₂O₃ + 3H₂O

Given

Chemical equations

Required

The balanced combination equation

Solution

There are several types of reactions that can occur

Synthesis/combination : 2 elements combine to form a single product

A + B⇒AB

Decomposition: One compound breaks down into 2 components

AB⇒A + B

Decomposition is the reverse of syntesis reaction

A balanced equation shows that the number of atoms from the reactant and product sides is the same

The chemical equations that fulfill the two things above (combined and balanced reactions) are:

Cl₂0₅ + H₂O → 2HCIO₃

2Fe(OH)₃ → Fe₂O₃ + 3H₂O

Answer:

Cl2O5 + 3H2O ⟶ HClO3  is the correct answer

Explanation:

Answer:

he ocean

Explanation:

They are sea cretures who origanly lived in water (or near i forgot)

Answer:

gas X

Explanation:

Answer:

Explanation:

4) What is the molarity of the following solution?

Number of moles = 1.71 mol

Volume of solution = 5.15 L

Molarity of solution = ?

Solution:

Molarity = number of moles / volume in L

Molarity = 1.71 mol / 5.15 L

Molarity = 0.33 M

5) How many moles of solute are contained in the following solution?

Volume of solution = 126mL  = 126 mL× 1 L /1000 mL = 0.126 L

Molarity of solution = 4.03 M

Number of moles of CaCl2 = ?

Solution:

M = number of moles / volume in L

4.03 M  =  number of moles /  0.126 L

Number of moles = 4.03 M  × 0.126 L ( M = mol / L)

Number of moles = 0.508 mol

6) How many grams of solute are contained in the following?

Volume of solution = 102.7 mL (102.7 mL× 1 L /1000 mL = 0.1027 L)

Molarity  = 7.99 M

Mass of solute (KOH) = ?

Solution:

M = number of moles / volume in L

7.99 M = number of moles / 0.1027 L

Number of moles = 7.99 M × 0.1027 L

Number of moles = 0.82 mol

Mass of KOH:

Mass = number of moles × molar mass

Mass = 0.82 mol × 56.1 g/mol

Mass = 46.00 g

Answer:

138.14547456

Explanation:

How many moles Aluminium in 1 grams? The answer is 0.037062379468509.

We assume you are converting between moles Aluminium and gram.

You can view more details on each measurement unit:

molecular weight of Aluminium or grams

The molecular formula for Aluminium is Al.

The SI base unit for amount of substance is the mole.

1 mole is equal to 1 moles Aluminium, or 26.981538 grams.

Note that rounding errors may occur, so always check the results.

Use this page to learn how to convert between moles Aluminium and gram.

Answer:

[tex]\boxed {\boxed {\sf About \ 138 \ grams \ of \ aluminum}}[/tex]

Explanation:

To convert from moles to grams, we must use molar mass.

This can be found on the Periodic Table, so look for the symbol for aluminum: Al

We can use this number as a ratio.

[tex]\frac { 26.981538 \ g \ Al} { 1 \ mol \ Al}[/tex]

Multiply by the given number of moles: 5.12

[tex]5.12 \ mol \ Al *\frac { 26.981538 \ g \ Al} { 1 \ mol \ Al}[/tex]

Multiply. The moles of aluminum will cancel.

[tex]5.12*\frac { 26.981538 \ g \ Al} { 1}[/tex]

[tex]138.145475 \ g \ Al[/tex]

Round. The original measurement of moles has 3 significant figures, so our answer must also have 3 sig figs.

For the number we calculated, that is the ones place. The 1 in the tenth place tells us to leave the 8.

[tex]138 \ g \ Al[/tex]

There is about 138 grams of aluminum in 5.12 moles.

Answer:

29.5%

Explanation:

Step 1: Given data

Step 2: Calculate the mass percentage of ethylene glycol in the liquid

We will use the following expression.

%m/m = mass of ethylene glycol/ mass of solution × 100%

%m/m = 124 g/420 g × 100% = 29.5%

The mass percentage of ethylene glycol in the liquid is 29.5%.

240.1 L NH₃

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

[Given]   10.72 mol NH₃ (g)

Step 2: Identify Conversions

[STP] 22.4 L/mol

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 4 sig figs.

240.128 L NH₃ ≈ 240.1 L NH₃

Answer:

[tex]m_{C_6H_5Cl}=65.7gC_6H_5Cl[/tex]

Explanation:

Hello!

In this case, according to the given balanced chemical reaction:

[tex]C_6H_6 (l) + Cl_2 (g) \rightarrow C_6H_5Cl (s) + HCl (g)[/tex]

We can see there is 1:1 between benzene and chlorobenzene as the relavant product; thus, since the molar mass of benzene is 78.11 g/mol and that of chlorobenzene is 112.55 g/mol, the theoretical yield for this reaction turns out:

[tex]m_{C_6H_5Cl}=45.6gC_6H_6*\frac{1molC_6H_6}{78.11gC_6H_6 }*\frac{1molC_6H_5Cl}{1molC_6H_6}*\frac{112.55gC_6H_5Cl}{1molC_6H_5Cl} \\\\m_{C_6H_5Cl}=65.7gC_6H_5Cl[/tex]

Best regards!

Answer:

Mechanical

Explanation:

mechanical energy:

energy that an object has

because of its motion or

position

Answer:

0.9248kPa

Explanation:

We are to convert from torr to kPa;

 To solve this problem, more appropriately the conversion process is from:

      torr to Pa and then kPa

These are units of pressure;

         1 torr  = 1Pa

 So;

         924.8torr is the same as 924.8Pa

           1000Pa  = 1kPa

          924.8Pa  = [tex]\frac{924.8}{1000}[/tex]    = 0.9248kPa

Answer:

13

Explanation:

Answer:

[tex]Q=330J[/tex]

Explanation:

Hello!

In this case, since the energy involved during a heating process is calculated as shown below:

[tex]Q=mC(T_2-T_1)[/tex]

Whereas we consider the mass, heat capacity and temperature; we are able to plug in the given data to obtain:

[tex]Q = 20g*1.1\frac{J}{g\°C}(40\°C-25\°C)\\\\Q = 330J[/tex]

Best regards!

Answer:

1) 61.8%

Explanation:

(4.2/6.8)*100

Answer:

Ths is question uncompleted!

Answer:True

Explanation:

Answer:

False

Explanation:

Its false, the bonds become weaker.

Answer:

Q = 146.25  J

Explanation:

Given that,

The mass of 10 copper pennis = 25 grams

It warm up from 23°C to 38°C.

The specific heat capacity of copper is 0.39 J/g°C

We need to find the energy absorbed by the pennies. The expression for the energy absorbed is given by :

[tex]Q=mc\Delta T\\\\Q=25\times 0.39\times (38-23)\\\\Q=146.25\ J[/tex]

So, 146.25  J of energy is absorbed by the pennies. Hence, this is the required solution.

Answer:

sodium ion

Explanation:

And, so if we gots a representation of Na+ , or Cl− , we know that for the sodium ion, while there are 11 charged nuclear particles (how do we know this?), there are 10 charged extranuclear particles, 10 electrons.

brainliest pls

Answer:

Sodium Hydroxide + Sulfuric Acid = Sodium Sulfate + Water

2NaOH + H2SO4 → Na2SO4 + 2H2O

Explanation:

To balance a chemical equation, enter an equation of a chemical reaction and press the Balance button. The balanced equation will appear above.

Use uppercase for the first character in the element and lowercase for the second character. Examples: Fe, Au, Co, Br, C, O, N, F.

Ionic charges are not yet supported and will be ignored.

Replace immutable groups in compounds to avoid ambiguity. For example, C6H5C2H5 + O2 = C6H5OH + CO2 + H2O will not be balanced, but XC2H5 + O2 = XOH + CO2 + H2O will.

Compound states [like (s) (aq) or (g)] are not required.

You can use parenthesis () or brackets [].