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xeze [42]
3 years ago
11

Why does sublimation feel cold?

Chemistry
1 answer:
Gala2k [10]3 years ago
7 0
Cause it felt like being cold
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How do you get matter from food?
IrinaK [193]

Answer:

mark brainliest :)

Explanation:

Animals have to eat other living things to get their food, but plants can produce their own food. Plants absorb sunlight and use that energy to make glucose from carbon dioxide and water during the process of photosynthesis; glucose is the food plants can use as a source of energy or matter for growth

3 0
4 years ago
Read 2 more answers
If a sample of HF gas at 694.9 mmHg has a volume of 3.463 Land the volume is changed to 5.887 L, then what will be the new press
VARVARA [1.3K]

Answer:

\large \boxed{\text{381.7 mmHg}}

Explanation:

Data:

p₁ = 694.9 mmHg; V₁ = 3.463 L

p₂ = ?;                     V₂ = 5.887 L

Calculation:

\begin{array}{rcl}p_{1}V_{1} & = & p_{2}V_{2}\\\text{648.9 mmHg} \times \text{3.463 L} & = & p_{2} \times\text{5.887 L}\\\text{2247.1 mmHg} & = & 5.887p_{2}\\p_{2} & = & \dfrac{\text{2247.1 mmHg}}{5.887}\\\\& = &\textbf{381.7 mmHg}\\\end{array}\\\text{The new pressure of the gas is $\large \boxed{\textbf{381.7 mmHg}}$}

4 0
3 years ago
You need 65.0 g of aluminum for an experiment. How many atoms of aluminum is that?
nikdorinn [45]

Answer:

Explanation:

To convert the mass of Aluminum to atoms, we must first convert to moles by using the formula;

mole = mass/molar mass

5 0
3 years ago
8. If 0.795 moles of ammonia gas occupies 42.5 L at 670 torr, what is the Celsius temperature?
maksim [4K]

<u>Answer:</u> The temperature in degree Celsius is 301.31°C

<u>Explanation:</u>

To calculate the temperature, we use the equation given by ideal gas, which is:

PV=nRT

P = pressure of the gas = 670 torr = 0.882 atm   (Conversion factor: 1 atm = 760 torr)

V = volume of gas = 42.5 L

n = number of moles of gas = 0.795 mol

R = Gas constant = 0.0821\text{ L atm }mol^{-1}K^{-1}

T = temperature of gas

Putting values in above equation, we get:

0.882atm\times 42.5L=0.795mol\times 0.0821\text{ L atm }mol^{-1}K^{-1}\times T\\\\T=574.31K

Converting the temperature from kelvins to degree Celsius, by using the conversion factor:

T(K)=T(^oC)+273

574.31=T(^oC)+273\\T(^oC)=301.31^oC

Hence, the temperature in degree Celsius is 301.31°C

6 0
3 years ago
CCC Structure and Function Why is the arrangement of the constituent atoms or
ozzi

Since the atoms or molecules in a solid do not translate hence, the structures of solids usually described in terms of the positions  of the constituent atoms rather than their motion.

<h3>States of matter</h3>

There are three state of matter which are;

  • Solid
  • Liquid
  • Gas

In a solid, atoms or molecules retain their positions and do not translate, hence, the structure of atoms or molecules are most important in determining the structure of a solid.

Also, the fact that the atoms or  molecules in a solid can only vibrate or rotate explains why the structures of solids usually described in terms of the positions  of the constituent atoms rather than their motion.

Learn more about the states of matter: brainly.com/question/9402776

8 0
3 years ago
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