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dexar [7]
3 years ago
7

Which statements describe the death of stars? Check all that apply.

Chemistry
2 answers:
baherus [9]3 years ago
6 0

Answer:

a,b

Explanation:

Sveta_85 [38]3 years ago
5 0

Answer:A and B

Explanation:a stats final stages of life depend on its mass and stars die when they run out of fuel

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Can anybody check my answer?
anzhelika [568]

Answer:

\boxed{\text{25. 20 L; 26. 49 K}}

Explanation:

25. Boyle's Law

The temperature and amount of gas are constant, so we can use Boyle’s Law.

p_{1}V_{1} = p_{2}V_{2}

Data:

\begin{array}{rcrrcl}p_{1}& =& \text{100 kPa}\qquad & V_{1} &= & \text{10.00 L} \\p_{2}& =& \text{50 kPa}\qquad & V_{2} &= & ?\\\end{array}

Calculations:

\begin{array}{rcl}100 \times 10.00 & =& 50V_{2}\\1000 & = & 50V_{2}\\V_{2} & = &\textbf{20 L}\\\end{array}\\\text{The new volume will be } \boxed{\textbf{20 L}}

26. Ideal Gas Law

We have p, V and n, so we can use the Ideal Gas Law to calculate the volume.

pV = nRT

Data:  

p = 101.3 kPa

V = 20 L

n = 5 mol

R = 8.314 kPa·L·K⁻¹mol⁻¹

Calculation:

101.3 × 20 = 5 ×  8.314 × T

2026 = 41.57T

T = \dfrac{2026}{41.57} = \textbf{49 K}\\\\\text{The Kelvin temperature is }\boxed{\textbf{49 K}}

6 0
3 years ago
Which is true about sugar dissolving in water?
gizmo_the_mogwai [7]
<span>The correct answer is "Sugar is the solute and water is the solvent". Why? Sugar can be dissolved by water itself, especially in hot water, which is why water is considered to be a solvent, while sugar is considered to be a solute because it can be dissolved.</span>
6 0
3 years ago
Which functional group does the molecule below have?
makvit [3.9K]

Answer:

B

Explanation:

7 0
2 years ago
Determining wether the molecule is polar or non polar
Rainbow [258]

Answer:

1) polar

2)polar (not too sure about this one)

3)nonpolar

7 0
3 years ago
How many mL of 14.5M lithium carbonate solution must be used to deliver 4.20 g of lithium ion
svet-max [94.6K]

Answer:

10.3 g Li) / (6.9410 g Li/mol) x (1 mol Li3PO4 / 3 mol Li) / (0.750 mol/L Li3PO4) = 0.6595 L = 660. mL

Explanation:

7 0
3 years ago
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