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3 years ago

For a gas to become a liquid it’s particles must A. Speed up B. Slow down C. Stop

Chemistry

1 answer:

madam [21]3 years ago

3 0

Slow down because liquids have less movement than gases

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Write balanced nuclear equations for the formation of five elements whose atomic number is between helium (2) and iron (26).

stiv31 [10]

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions here.

<span> the equation for helium could be: D + T -> He + n. D is deuterium (H-2), T is tritium (H-3), and n symbolizes a neutron.</span>

3 0

3 years ago

How many milliliters of a stock solution of 2.00M KNO3 would you need to prepare 150mL of a 0.3M solution?

ser-zykov [4K]

Answer:

The answer is "22.5"

Explanation:

Concentration:

$M_1= 0.3 \ m \ of\ KNO_3\\\\M_2=2.00\ M\\\\$

Volume:

$V_1=150 \ ml \ of\ KNO_3 \\\\V_2=?$

Using formula:

$M_1V_2=M_2V_2\\\\V_2=\frac{M_1V_1}{M_2}\\\\$

$=\frac{0.3 \times 150}{2}\\\\=\frac{45}{2}\\\\=22.5$

3 0

3 years ago

1. If temperature is increased, the number of<br> collisions per second

andrey2020 [161]

Answer:

Increases

Explanation:

Increasing the temperature increases reaction rates because of the disproportionately large increase in the number of high energy collisions.

4 0

3 years ago

()

const2013 [10]

Answer:

$\large \boxed{\text{-1276 kJ/mol}}$

Explanation:

You calculate the energy required to break all the bonds in the reactants.

Then you subtract the energy needed to break all the bonds in the products.

CH₃CH₂OH + 3O₂ ⟶ 2CO₂ + 3H₂O

Bonds: 5C-H 1C-C 1C-O 1O-H 3O=O 4C=O 6O-H

D/kJ·mol⁻¹: 413 347 358 467 495 799 467

$\Delta H = \sum{D_{\text{reactants}}} - \sum{D_{\text{products}}}\\\sum{D_{\text{reactants}}} = 5 \times 413 + 1 \times 347 + 1 \times 358 + 1 \times 467 + 3 \times 495 = 3237 + 1485\\=\text{4722 kJ}\\\sum{D_{\text{products}}} = 4 \times 799 + 6 \times 467 =3196 + 2802 = \text{5998 kJ}\\\Delta H = 4722 - 5998= \textbf{-1276 kJ} \\ \text{The overall energy change is $\large \boxed{\textbf{-1276 kJ/mol}}$}.$

6 0

4 years ago

2. When the child is pushed in the toy car, he increases speed. Does he accelerate as he is being pushed?

Otrada [13]

Yes. Look up Newton’s laws of physics. That should help

7 0

3 years ago

Read 2 more answers