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3 years ago

Write the complete balanced chemical equation _A+_BC3->_AC2 +_ B

Chemistry

1 answer:

telo118 [61]3 years ago

6 0

Answer:

Prueba con tus argumentos quienes sufren mas con la violencia?

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A student designs an experiment where she will add varying amounts of sugar to a chemical reaction and then measure the mass of

Fiesta28 [93]

The independent variable is the amount of sugar the student is adding because that is the controlled variable.

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3 years ago

The reaction of sodium and chlorine to form salt is best described as an?

disa [49]

The chemical reaction that takes place between sodium and chlorine to form table salt (NaCl) gives off heat; therefore, this can be described as an exothermic chemical reaction.

Brainliest answer please?

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3 years ago

4.82 g of an unknown metal is heated to 115.0∘C and then placed in 35 mL of water at 28.7∘C, which then heats up to 34.5∘C. What

nikitadnepr [17]

<u>Answer:</u> The specific heat of metal is 2.34 J/g°C

<u>Explanation:</u>

To calculate the mass of water, we use the equation:

$\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}$

Density of water = 1 g/mL

Volume of water = 35 mL

Putting values in above equation, we get:

$1g/mL=\frac{\text{Mass of water}}{35mL}\\\\\text{Mass of water}=(1g/mL\times 35mL)=35g$

When metal is dipped in water, the amount of heat released by metal will be equal to the amount of heat absorbed by water.

$Heat_{\text{absorbed}}=Heat_{\text{released}}$

The equation used to calculate heat released or absorbed follows:

$Q=m\times c\times \Delta T=m\times c\times (T_{final}-T_{initial})$

$m_1\times c_1\times (T_{final}-T_1)=-[m_2\times c_2\times (T_{final}-T_2)]$ ......(1)

where,

q = heat absorbed or released

$m_1$ = mass of metal = 4.82 g

$m_2$ = mass of water = 35 g

$T_{final}$ = final temperature = 34.5°C

$T_1$ = initial temperature of metal = 115°C

$T_2$ = initial temperature of water = 28.7°C

$c_1$ = specific heat of metal = ?

$c_2$ = specific heat of water = 4.186 J/g°C

Putting values in equation 1, we get:

$4.82\times c_1\times (34.5-110)=-[35\times 4.186\times (34.5-28.7)]$

$c_1=2.34J/g^oC$

Hence, the specific heat of metal is 2.34 J/g°C

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3 years ago

Solve the problems. Express your answers to the correct number of significant figures.

Scilla [17]

1. 1.141

2. 119.3

HOPE THIS HELPS.

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3 years ago

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When Earth is tilted on its axis why does it orbit the sun ?

Brrunno [24]

Answer:

Here

Explanation:

Some assume our planet's changing distance from the sun causes the change in the seasons. That's logical, but not the case for Earth. Instead, Earth has seasons because our planet's axis of rotation is tilted at an angle of 23.5 degrees relative to our orbital plane, that is, the plane of Earth's orbit around the sun

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3 years ago