How does a jacket keep you warm?

Answer:

6.19 mol H₂O

Explanation:

First, we convert 70.25 grams of NH₃ into moles, using its molar mass:

Then we convert 4.13 moles of NH₃ into moles of H₂O, using the stoichiometric coefficients of the balanced reaction:

the answer is A..which is true

Answer:

the water molecules have more energy and are moving faster than the molecules of cold water. This makes it easier for the dye to get mixed throughout the hot water.

Explanation:

Answer:

Because particles moves more by kinetic energy and diffusion will spread with the particles

Explanation:

Answer:

See explanation

Explanation:

According to the question Copper is obtained from  the original alloy and the copper wire used to displace the silver.  

So,

Mass of the copper from the original alloy: (10.00 % * 1.250 g) =  0.125 g

We now need to obtain the mass of the copper from the wire, then we consider how much silver is precipitated:

Mass of silver in the alloy; 90.00 % * 1.250 g = 1.125 g

So,

Amount of silver precipitated =

1.125 / 107.9 = 0.01043 mole

From the reaction equation, it takes two moles of silver to displace one mole of copper.

Hence, the amount of copper from the wire is:  0.01043 / 2 = 0.005213 mol

And a mass of  0.005213(63.55) = 0.3313 g

Total mass of copper=  0.125 + 0.3313 = 0.456 g

Answer:

plants and animals

Explanation:

Answer:

water, light, wind, soil, humidity, minerals, gases

Explanation:

i just know

Answer:

78.12 L

Explanation:

Given that,

Initial volume, V₁ = 105 L

Initial temperature, T₁ = 20°C = 20+273 = 293 K

New temperature, T₂ = -55 °C = 218 K

We need to find the new volume of the balloon. The relation between the volume and the temperature is given by :

[tex]\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}[/tex]

Where

V₂ is the new volume

[tex]V_2=\dfrac{V_1T_2}{T_1}\\\\V_2=\dfrac{105\times 218}{293}\\\\V_2=78.12\ L[/tex]

So, the new volume is 78.12 L.

Answer and Explanation:

Photosynthesis reaction involves two reactants, carbon dioxide and water. These two reactants yield two products, namely, oxygen and glucose.

Answer:

hello can you follow me

Explanation:

used in fire extinction, blasting rubber, foaming rubber and plastic

The correct answer is option A; Mesosphere

The mesosphere is defined as the part atmosphere found above the stratosphere but below the thermosphere.

In this layer of the atmosphere, temperature decreases with height. It covers about 50 to 85 km above the earth.

Mesosphere is the only layer of the atmosphere that was correctly spelt among the options.

Learn more: https://brainly.com/question/12117482

Answer:

Ca²⁺(aq) + S²⁺(aq) + Cd²⁺(aq) + 2Cl¯(aq) —> CdS (s) + Ca²⁺(aq) + 2Cl¯(aq)

Explanation:

CaS (aq) + CdCl₂ (aq) –> CdS (s) + CaCl₂ (aq)

The complete ionic equation for the above reaction can be obtained as illustrated below:

In solution:

CaS (aq) —> Ca²⁺(aq) + S²⁺(aq)

CdCl₂ (aq) —> Cd²⁺(aq) + 2Cl¯(aq)

CaS (aq) + CdCl₂ (aq) –>

Ca²⁺(aq) + S²⁺(aq) + Cd²⁺(aq) + 2Cl¯(aq) —> CdS (s) + Ca²⁺(aq) + 2Cl¯(aq)

Answer:

1.) Eyewash station --> D

2.) Absorbent material --> G

3.) Fire extinguisher --> F

4.) Safety Shower --> E

5.) Biohazard container --> J

6.) Broken glass container --> I

7.) Safety goggles --> C

8.) Lab apron --> H

9.) asbestos gloves --> A

10.) Latex gloves --> B

Explanation:

In an equipped laboratory, alot of safety equipments are made available and kept in area that it could be easily accessed in the laboratory. Safety or protective equipments are those materials that helps protect a laboratory personnel while at work on the lab.

These equipments include:

--> Eyewash station: This is an equipment used in the laboratory during emergency to rinse chemical from the eye. Therefore option D is correct.

--> Absorbent material: They are used to contain small spills in the laboratory. Therefore option G is correct.

--> Fire extinguisher: This equipment is used to put out small fires. Therefore F is correct.

--> Safety Shower: This is used to rinse away chemical from clothes and on skin during emergency. Therefore option E is correct.

--> Biohazard container: This container is used to safely dispose bacteria culture, blood and other living tissues. Therefore option J is correct.

--> Broken glass container: This is used to dispose cracked, chipped or broken bottle in the laboratory. Therefore option I is correct.

--> Safety goggles: This helps to protect the eye from chemical and broken glasses. Therefore option C is correct.

--> Lab apron: This is worn by the laboratory personnel to help protect the skin from chemical and biohazards. Therefore option H is correct.

--> Asbestos gloves: these are heat resistant gloves used to protect the hands from heat. Therefore option A is correct.

--> Latex gloves: these are equally worn by the laboratory personnel to protect the hands from chemicals and biohazards

[tex]Answer :—✔[/tex]

Answer: The mass of aluminium sample is 55.4 gram

Explanation:

[tex]Q_{absorbed}=Q_{released}[/tex]

As we know that,  

[tex]Q=m\times c\times \Delta T=m\times c\times (T_{final}-T_{initial})[/tex]

[tex]m_1\times c\times (T_{final}-T_1)=-[m_2\times c\times (T_{final}-T_2)][/tex]      

where,

[tex]m_1[/tex] = mass of aluminium = ?

[tex]m_2[/tex] = mass of water = 300.0 g

[tex]T_{final}[/tex] = final temperature = [tex]23.8^0C[/tex]

[tex]T_1[/tex] = temperature of aluminium = [tex]94.5^oC[/tex]

[tex]T_2[/tex] = temperature of water = [tex]21.0^oC[/tex]

[tex]c_1[/tex] = specific heat of aluminium = [tex]0.897J/g^0C[/tex]

[tex]c_2[/tex] = specific heat of water =  [tex]4.184J/g^0C[/tex]

Now put all the given values in equation (1), we get

[tex]-[m_1\times c_1\times (T_{final}-T_1)]=[m_2\times c_2\times (T_{final}-T_2)][/tex]

[tex]-[m_1\times 0.897\times (23.8-94.5)^0C]=[300.0g\times 4.184\times (23.8-21.0)][/tex]

[tex]m_1=55.4g[/tex]

Therefore, the mass of aluminium sample is 55.4 gram

Answer:

114.23g

Explanation:

Mass = xg

Mole = 0.334 mol

Molar mass of Sucrose

(C = 12, H = 1, O = 16)

C12H22O11

(12×12)+(1×22)+(16×11)

144 + 22 + 176

342g/mol

Mass = No of mole × Molar mass

Mass = 0.334 × 342

Mass = 114.228

Mass ≈ 114.23g

Answer:

40.kPa hope this helps....

Answer:

[tex]v = s \div t[/tex]

[tex]t = s \div v[/tex]

[tex]t = 300 \div 1500 = 0.2s[/tex]

Answer:

c. core, mantle and atmosphere

Answer:

Correct answer is letter A

Because Lithosphere includes the crust and the uppermost mantle.

Answer:

In a combustion reaction, a substance reacts with oxygen from the air. Combustion reactions happen at high temperatures, and transfer energy to the surroundings as light and heat. This is why you see flames when things burn. ... The products of combustion reactions are compounds of oxygen, called oxides.

Answer:

13 branches/tree

Explanation:

Step 1: Given data

Step 2: Calculate the total number of branches (b)

We will use the following expression.

b = l × b/l

b = 19565 leaves × 1 branch/35 leaves = 559 branch

Step 3: Calculate the number of branches per tree (b/t)

We will divide the total number of branches by the total number of trees.

559 branches/43 trees = 13 branches/tree

Answer:

pH value of HCL = 2.69897

Explanation:

Given:

Concentration of HCL = 0.002 M

Find:

pH value of HCL

Computation:

pH value of HCL = - log(Concentration of HCL)

pH value of HCL = - log(0.002)

pH value of HCL = 2.69897

Answer:

The most abundant chemical/gas is Nitrogen, which makes up about 78% and Oxygen at second place with approximately 21%

Answer:

Nitrogen and Oxygen because about 70% of air is nitrogen and around 20% of air is Oxygen.

Hope this helps!

Answer:we see 1 side because the other side is not visible

Explanation:

Answer:

See explanation

Explanation:

Full molecular equation;

2NH3(aq) + AgNO3(aq) -------> [Ag(NH3)2]NO3(aq)

Full ionic equation

2NH3(aq) + Ag^+(aq) + NO3^-(aq) --------> [Ag(NH3)2]^+(aq) + NO3^-(aq)

Net ionic equation;

2NH3(aq) + Ag^+(aq) -------->  [Ag(NH3)2]^+(aq)

When Silver nitrate is mixed with a solution of aqueous ammonia, a white and cloudy solution was observed.

Answer:

11 electrons

Explanation:

The number of electrons is the same as the number of protona in a ATOM.

They will most likely be different in a ion, simple bond or a convalent bond.

Answer:

53.5gram.

Explanation

Explanation: number of moles = number of molecule ÷ avogadro's number. => moles = 6.022 × 10²³ ÷ 6.022 × 10²³ = 1 mole. mass of 1 mole of NH4Cl = 1 × molar mass.

Answer:

b) carboxylic acid

Explanation:

Answer: The hydrogen ion concentration in molarity is 0.013

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pOH is calculated by taking negative logarithm of hydroxide ion concentration and pH is calculated by taking negative logarithm of hydrogen ion concentration

Putting in the values:

[tex]pOH=-\log[7.609\times 10^{-13}][/tex]

[tex]pOH=12.1[/tex]

Now , [tex]pH+pOH=14[/tex]

[tex]pH=14-12.1=1.9[/tex]

[tex]pH=-\log [H^+][/tex]

[tex][H^+]=0.013M[/tex]

The hydrogen ion concentration in molarity is 0.013

Answer:

.4 moles

Explanation:

this is if it's 35 grams