can someone please solve it?​

Answer:

CH₂

Explanation:

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

Mass of compound = 1 g

Mass of CO₂ = 3.14 g

Mass of H₂O = 1.29 g

Empirical formula =?

Next, we shall determine the mass of Carbon and hydrogen present in the compound. This can be obtained as follow:

For Carbon, C:

Mass of CO₂ = 3.14 g

Molar mass of CO₂ = 12 + (2×16)

= 12 + 32

= 44 g/mol

Molar mass of C = 12 g/mol

Mass of C =?

Mass of C = molar mass of C/ Molar mass of CO₂ × Mass of CO₂

Mass of C = 12/44 × 3.14

Mass of C = 0.86 g

For hydrogen, H:

Mass of C = 0.86 g

Mass of compound = 1 g

Mass of H =?

Mass of H = (Mass of compound) – (mass of C)

Mass of H = 1 – 0.86

Mass of H = 0.14 g

Finally, we shall determine the empirical formula of the cyclopropane. This can be obtained as follow:

Mass of C = 0.86 g

Mass of H = 0.14 g

Divide by their molar mass

C = 0.86 / 12 = 0.07

H = 0.14 / 1 = 0.14

Divide by the smallest

C = 0.07 / 0.07 = 1

H = 0.14 / 0.07 = 2

Thus, the empirical formula of cyclopropane is CH₂

Explanation:

What are the mole ratio and the mass ratio for H2O to O2 in the reaction 2H2 + O2 → 2H2O? Mole ratio of H2O to O2 in the given reaction is H2O : O2 = 2 : 1. Mass ratio of H2O to O2 in the given reaction is H2O : O2 = 36 : 32 = 1 : 1.1.

mmmmmmmmmmhhhhhhhhhhhhhhhhhhhh

Answer:

Molecular mass of NH3 = ( 14 + 3 ) = 17 g

[tex]PV = \frac{m}{m _{r}} RT \\ P \times 50.0 \times {10}^{ - 6} = \frac{68.0}{17} \times 8.314 \times (30.0 + 273) \\ P = \frac{68.0 \times 8.314 \times 303}{17 \times 50.0 \times {10}^{ - 6} } \\ P = 2.02 \times {10}^{8} \: Pascals[/tex]

C. Radiation is the answer.

As it can happen in vacuum also

Answer: Radiation

Explanation:

Answer:

To produce a solution that frees at -50°C we need 1668.5 g of ethylene glycol

Explanation:

Formula for freezing point depression is:

Freezing T° of pure solvent - Freezing T° of solution = Kf . m . i

Our solute is the ethylene glycol, then water is our solvent.

As ethylene glycol is a non ionic compound, i = 1 (Van't Hoff factor, numbers of ions dissolved)

Kf = Cryoscopic constant. For water is 1.86 °C/m

We replace data:

0°C - (-50°C) = 1.86 °C/m . m . 1

To determine grams of ethylene glycol needed, we need to find m (molality)

50°C / 1.86 m/°C = m → 26.8 mol/kg

As this moles of solute are contained in 1kg, definetely we need 26.8 moles of ethylene glycol.

To find the answer, we convert moles to mass:

26.8 mol . 62.07g / mol = 1668.5 g

Answer: 3. H2O(l) -> H2O(g)

Explanation: Entropy is a measure of the randomness or disorder a substance. Gasses have the greatest amount of entropy and solids have the least amount of entropy. The entropy of a sample of H2O increases as liquid water evaporates and changes to a gas.

The entropy of a sample of H2O increases when the phase of change that is  H2O(l) -> H2O(g) occurs. This is because entropy increases when a substance undergoes sublimation (solid to gas) or evaporation (liquid to gas).

When the given sample of H2O changes its phase from liquid to gas, the entropy increases. It also happens when it changes from solid to gas.

Thus, option 3: H2O(l) -> H2O(g), the entropy increases.

Learn more about the entropy here:

https://brainly.com/question/16718133

https://brainly.com/question/17113982

#SPJ2

Answer:

A metallic bond is formed by the attraction between positively charge metal ions and the electrons around the ions.

Explanation:

Hope this helps.

Answer: The mass of [tex]H_2[/tex] produced is 0.153 g

Explanation:

The number of moles is defined as the ratio of the mass of a substance to its molar mass. The equation used is:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] ......(1)

Given mass of zinc = 5.0 g

Molar mass of zinc = 65.38 g/mol

Putting values in equation 1, we get:

[tex]\text{Moles of zinc}=\frac{5.0g}{65.38g/mol}=0.0765mol[/tex]

Given mass of HCl = 10.0 g

Molar mass of HCl = 36.46 g/mol

Putting values in equation 1, we get:

[tex]\text{Moles of HCl}=\frac{10.0g}{36.46g/mol}=0.274mol[/tex]

The given chemical equation follows:

[tex]Zn+2HCl\rightarrow ZnCl_2+H_2[/tex]

By stoichiometry of the reaction:

If 1 mole of zinc reacts with 2 moles of HCl

So, 0.0765 moles of zinc will react with = [tex]\frac{2}{1}\times 0.0765=0.153mol[/tex] of HCl

As the given amount of HCl is more than the required amount. Thus, it is present in excess and is considered as an excess reagent.

Thus, zinc is considered a limiting reagent because it limits the formation of the product.

By the stoichiometry of the reaction:

If 1 mole of zinc produces 1 mole of [tex]H_2[/tex]

So, 0.0765 moles of zinc will produce = [tex]\frac{1}{1}\times 0.0765=0.0765mol[/tex] of [tex]H_2[/tex]

We know, molar mass of [tex]H_2[/tex] = 2 g/mol

Putting values in above equation, we get:

[tex]\text{Mass of }H_2=(0.0765mol\times 2g/mol)=0.153g[/tex]

Hence, the mass of [tex]H_2[/tex] produced is 0.153 g

Answer:

Heterogeneous mixture...is the answer

The dude above me is right. I thought he was wrong, so I put A but it turns out he was right!

Answer:

hagaowtw8twbwjwyw kwuwutw6wt2ywvw witw6wyvwa86w6wcwe ue5wt3yfwywyw iwywiw7w

uwiuwwj9ww

Explanation:

iwjwyaab77w92 and a wherever whatever wueetwb eiw

uwyiwgwkewbekkwuw jwywue kwuwiwywh

kwywiwyw iwtwigw eiywgwiw it wow

bwwneo

Answer:

3.54g Cl-/dm³

Explanation:

To solve this question we must, as first, find the mass of chloride ions finding first, the moles of MgCl2. Then, we must convert the cm³ to dm³ (1cm³ = 0.001dm³).

Moles MgCl2 -Molar mass: 95.211g/mol-

2.38g * (1mol / 95.211g) = 0.0250 moles MgCl2

Moles Cl-:

0.0250 moles MgCl2 * (2mol Cl- / 1mol MgCl2) = 0.0500 moles Cl-

Mass Cl- -Molar mass: 35.45g/mol-:

0.0500 moles Cl- * (35.45g / mol) = 1.77g of chloride ions

dm³:

500cm³ * (0.001dm³ / 1cm³) = 0.500dm³

The concentration is:

1.77g of chloride ions / 0.500dm³ =

Answer:

Examples of physical change include changes in the size or shape of matter. Changes of state—for example, from solid to liquid or from liquid to gas—are also physical changes. Some of the processes that cause physical changes include cutting, bending, dissolving, freezing, boiling, and melting.

Explanation:

Answer:

Explanation:

Instrument used to measure wind speed are known as anemometer and can record wind speed, direction, and strength. The normal unit of wind speed is knots (nautical miles per hour)

[tex]mass \: of \: the \: car \: = 1250 \: kg \\ \\ velocity \: of \: the \: car \: is \: = 2.3m/s \\ \\ formula \: to calculate \: momentum \: \\ \\ \: \: \: \: p = mv \: \: \: (m = mass \: and \: v = velocity) \\ \\ momentum \: = 1250 \times 2.3 = 2875m/s[/tex]

Answer:

Flourine reacts with Sodium bromide to give Silver flourine and Bromine

Hope u understand

Thank You

Please mark as brainliest

Answer:

posaaaaaaaaaaaaaaaaaaaaa

Answer:

approximately 1.772 grams

Explanation:

molecular mass of AlCl3 is 132 g per mole and of Al(OH)3 is 78 g per mole

the reaction is

AlCl3 + 3 NaOH ---> Al(OH)3 + 3 NaCl

from the reaction it is clear that 1 mole AlCl3 makes 1 mole Al(OH)3

implies 132g AlCl3 gives 78g Al(OH)3

Implies 3g AlCl3 gives

[tex]3 \times \frac{132}{78} = 1.772 \: g \: al(oh)3[/tex]

Answer:

use grahamns law to get the answer

Answer:

[tex]m_{solvente}=2400mg[/tex]

Explanation:

¡Hola!

En este caso, con la información dada, es posible inferir que este problema es acerca del porcentaje en masa del soluto y que se calcula de la siguiente manera, en términos de la masa de soluto y solución:

[tex]\% m=\frac{m_{soluto}}{m_{solucion}} *100\%[/tex]

De este modo, como conocemos el porcentage y la masa del soluto, podemos calcular la masa de la solución primero:

[tex]m_{solucion}=\frac{m_{soluto}}{\% m} *100\%\\\\m_{solucion}=\frac{600mg}{20\%} *100\%\\\\m_{solucion}=3000mg[/tex]

Esto quiere decir que la masa del solvente es:

[tex]m_{solvente}=m_{solucion}-m_{soluto}\\\\m_{solvente}=3000mg-600mg\\\\m_{solvente}=2400mg[/tex]

¡Saludos!

Answer:

205.12 atm

Explanation:

Using the ideal gas law equation:

PV = nRT

Where;

P = pressure (atm)

V = volume (L)

R = 0.0821 Latm/perK)

T = temperature (K)

n = number of moles (mol)

According to the information in this question;

P = ?

V = 34.25 mL = 34.25 ÷ 1000 = 0.03425L

n = 0.215 mol

T = 125.0°C = 125 + 273 = 398K

Using PV = nRT

P = nRT ÷ V

P = (0.215 × 0.0821 × 398) ÷ (0.03425)

P = 7.025 ÷ 0.03425

P = 205.12 atm

TMS has 12 protons which are all equivalent and four carbons, which are also all equivalent. This means that it gives a single, strong signal in the spectrum, which turns out to be outside the range of most other signals, especially from organic compounds.

Answer:

Difference between Solid Liquid and Gases

Solids Liquids Gases

Highly Strong intermolecular forces between the molecules, leads to a definite volume in Solids. The intermolecular forces are stronger than gases but weaker than solids. The intermolecular forces are practically non-existent. Thus, there is no definite volume.

Solids have a definite shape to them. Liquids do not have a definite shape. Gases do not have a definite shape.

The intermolecular space between solids is absent. The intermolecular space is moderate but present. The intermolecular space is free-flowing and plenty.

The force of attraction between the molecules is incredibly high. The force of attraction between molecules is pretty moderate. There is no intermolecular force of attraction between the molecules.

Answer:

Explanation:

To be honest I reallydont know their but hope u get ur answer

Answer:

0.5= 16

1 =8

2=4

3=2.66

Explanation:

Answer:

Proteins are made up of 20 amino acids. How an Isotope Technique Helps Determine Protein Quality. However be produced by the body and therefore are participated in the labelling process.

Explanation:

Answer:

Part (1a): The number of moles are 2.14 moles.

Part (1b): The number of moles are 12.2 moles.

Part (1c): The number of moles are 0.545 moles.

Part 2: The number of molecules are 1.38 × 10²⁵.

Part 3: The number of moles are 5.65 moles.

Part 4: The number of atoms are 1.81 × 10²⁴.

Part 5: The number of molecules are 1.20 × 10²⁶.

Explanation:

According to the mole concept:

1 mole of substance contains 6.022 × 10²³ number of atoms or molecules.

Part (1a): 1.29 × 10²⁴ hydrogen atoms in H

As, 6.022 × 10²³ number of hydrogen atoms present in 1 mole

So, 1.29 × 10²⁴ number of hydrogen atoms present in [tex]\frac{1.29\times 10^{24}}{6.022\times 10^{23}}=2.14[/tex] mole

Part (1b): 7.36 × 10²⁴ oxygen atoms

As, 6.022 × 10²³ number of oxygen atoms present in 1 mole

So, 7.36 × 10²⁴ number of oxygen atoms present in [tex]\frac{7.36\times 10^{24}}{6.022\times 10^{23}}=12.2[/tex] mole

Part (1c): 3.28 × 10²³ Na atoms

As, 6.022 × 10²³ number of Na atoms present in 1 mole

So, 3.28 × 10²³ number of Na atoms present in [tex]\frac{3.28\times 10^{23}}{6.022\times 10^{23}}=0.545[/tex] mole

Part 2:

As, 1 mole of oxygen contains 6.022 × 10²³ number of molecules

So, 23.0 moles of oxygen contains 23.0 × 6.022 × 10²³ = 1.38 × 10²⁵ number of molecules

Part 3:

As, 6.022 × 10²³ number of H₂SO₄ molecules present in 1 mole

So, 3.4 × 10 number of H₂SO₄ molecules present in [tex]\frac{3.4\times 10}{6.022\times 10^{23}}=5.65[/tex] mole

Part 4:

As, 1 mole of Na contains 6.022 × 10²³ number of atoms

So, 3.0 moles of Na contains 3.0 × 6.022 × 10²³ = 1.81 × 10²⁴ number of atoms

Part 5:

As, 1 mole of O₃ contains 6.022 × 10²³ number of molecules

So, 200 moles of O₃ contains 200 × 6.022 × 10²³ = 1.20 × 10²⁶ number of molecules

Answer:

a neutral solution has a pH of 7.

ph=-log(H+)

Explanation:

hence (H+)

=10⁷mol/dm³

Answer:

The moon's rotation and revolution take the same time.​

Explanation:

the moon's rotation and orbit is closely synced-up with our planet's.