1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Vsevolod [243]
3 years ago
15

Please help. Thank you:)

Chemistry
1 answer:
bearhunter [10]3 years ago
5 0
These are guesses because there is no word bank or anything

A. Water
B. Housing
C. Plants
D. Animals
E. Warmth
You might be interested in
When a glow stick is crushed and shaken, the two liquids mix and the stick glows.
Mars2501 [29]

Answer:

A chemical change has occurred, with energy being given off.

Explanation:

The liquids mix and the stick gives off energy in light form

3 0
3 years ago
helium-filled balloon at sea level has a volume of 2.1 L at 0.998 atm and 36°C. If it is released and rises to an elevation at w
elena55 [62]

the new volume of the balloon would be 2.3 L

8 0
3 years ago
The word eclipse most closely means to
Gennadij [26K]

Answer:

OD) Block the view of

Explanation:

3 0
3 years ago
A 0.4272 g sample of an element contains 2.241 x 10 ^21 atoms . what is the symbol of the element?
grin007 [14]

Answer:

Likely \rm In (indium.)

Explanation:

Number of atoms: N = 2.241 \times 10^{21}.

Dividing, N, the number of atoms by the Avogadro constant, N_A \approx 6.023 \times 10^{23} \; \rm mol^{-1}, would give the number of moles of atoms in this sample:

\begin{aligned} n &= \frac{N}{N_{A}} \\ &\approx \frac{2.241 \times 10^{21}}{6.023 \times 10^{23}\; \rm mol^{-1}} \approx 3.72 \times 10^{-3}\; \rm mol \end{aligned}.

The mass of that many atom is m = 0.4272\; \rm g. Estimate the average mass of one mole of atoms in this sample:

\begin{aligned}M &= \frac{m}{n} \\ &\approx \frac{0.4272\; \rm g}{3.72 \times 10^{-3}\; \rm mol} \approx 114.82\; \rm g \cdot mol^{-1}\end{aligned}.

The average mass of one mole of atoms of an element (114.82\; \rm g \cdot mol^{-1} in this example) is numerically equal to the average atomic mass of that element. Refer to a modern periodic table and look for the element with average atomic mass 114.82. Indium, \rm In, is the closest match.

5 0
3 years ago
Ello! lovely jewels ~<br>please help me with these questions ฅ^•ﻌ•^ฅ<br>Thanks in advance ​
QveST [7]

Answer:

<h2>#1</h2><h3>Which process is used for preparation of Sodium Carbonate? </h3>

<h2><em>Solvey process</em></h2><h3><em>is used for </em><em>t</em><em>h</em><em>e</em><em> </em><em>preparation of Sodium Carbonate</em><em>.</em></h3>

<h2>#2</h2><h3>How many water of crystallisation are there in Washing Soda?</h3>

<h2><em>Ten</em><em> </em><em>Molecules</em><em>.</em></h2><h3><em>As</em><em> </em><em>Washing</em><em> </em><em>Soda</em><em> </em><em>has</em><em> </em><em>formula</em><em> </em><em>NaCO3.10H2O</em><em> </em><em>.</em><em> </em><em>So</em><em> </em><em>it</em><em> </em><em>has</em><em> </em><em>t</em><em>en</em><em> </em><em>molecules</em><em> </em><em>of</em><em> </em><em>water</em><em> </em><em>crystallisation</em><em>.</em></h3>

6 0
2 years ago
Other questions:
  • How many formula units make up 30.4 g of magnesium chloride (mgcl2)?
    7·2 answers
  • What is the ph of a buffer consisting of 0.200 m hc2h3o2 and 0.200 m kc2h3o2? the k a for hc2h3o2 is 1.8×10−5. view available hi
    7·1 answer
  • Which pair below describes isotopes of the same element? A) an atom with 6 protons and 8 neutrons - an atom with 8 protons and 6
    9·2 answers
  • how many moles of carbon dioxide (CO2) are produced when reacting 6.00 moles of butane (C4H10) in excess oxygen (O2)?
    13·2 answers
  • Jamal was riding his bike home at a speed of 12 mph. On his trip out, he had traveled 8 miles away from his house. He has been t
    5·2 answers
  • The SI base unit for mass is the gram. TRUE FALSE ​
    9·2 answers
  • ⁉️⁉️1210 / 0.1223⁉️⁉️
    12·1 answer
  • How much aluminum oxide are produced when 46.5g of Al react with 165.37g of MnO?
    11·1 answer
  • What is necessary to produce visible light from chemical compounds?
    11·1 answer
  • What are the types of ions and how are they formed?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!