All categories

2 years ago

Please help!!!! Best answer will get brainliest.

Chemistry

1 answer:

Yuri [45]2 years ago

3 0

Answer:

ionic

Explanation:

I don't know if this correct

You might be interested in

Doctors use the radioactive isotope chromium-51 to label red blood cells in the human body. Chromium-51 gives off relatively ___

Airida [17]

Alpha particles are relatively heave and can be stopped by a sheet of paper.

7 0

3 years ago

Read 2 more answers

A volume of 105 mL of H2O is initially at room temperature (22.00 ∘C). A chilled steel rod at 2.00 ∘C is placed in the water. If

NemiM [27]

Answer:

<h3>25.0 grams is the mass of the steel bar.</h3>

Explanation:

Heat gained by steel bar will be equal to heat lost by the water

$Q_1=-Q_2$

Mass of steel= $m_1$

Specific heat capacity of steel = $c_1=0.452 J/g^oC$

Initial temperature of the steel = $T_1=2.00^oC$

Final temperature of the steel = $T_2=T=21.50^oC$

$Q_1=m_1c_1\times (T-T_1)$

Mass of water= $m_2= 105 g$

Specific heat capacity of water= $c_2=4.18 J/g^oC$

Initial temperature of the water = $T_3=22.00^oC$

Final temperature of water = $T_2=T=21.50^oC$

$Q_2=m_2c_2\times (T-T_3)-Q_1=Q_2(m_1c_1\times (T-T_1))=-(m_2c_2\times (T-T_3))$

On substituting all values:

$(m_1\times 0.452 J/g^oC\times (21.50^o-2.00^oC))=-(105 g\times 4.18 J/g^oC\times (21.50^o-22.00^o))\\\\m_1*8.7914=241.395\\\\m_1=\frac{219.45}{8.7914} \\\\m_1=24.9\\\\ \approx25 \texttt {grams}$

<h3>25.0 grams is the mass of the steel bar.</h3>

3 0

3 years ago

Read 2 more answers

_H2+O2=_H2O<br> balance help please

erastovalidia [21]

Both are 2
2H2+O2=2H2O

5 0

3 years ago

A 1.0 L volume of gas at 27.0°C exerts a pressure of 85.5 K PA what will the pressure be at 127°C assume constant volume

Marianna [84]

Answer:

114 kPa

Explanation:

Using Gay-Lussac's law you get the equation $\frac{P1}{T1} x \frac{P2}{T2}$ and converting celcius you get the final equation of $\frac{85.5}{27+273} x \frac{P2}{127+273}$ . After dividing 85.5 by 27+273(300) you get 0.285 and then you multiply 0.285 by 127+273 (400). You finally get 114 kPa

4 0

2 years ago

When are igneous rocks formed?

balandron [24]

Answer:

C. When melted rock solidifies.

3 0

2 years ago