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
yarga [219]
3 years ago
10

A solar eclipse will last 1 to _____ minutes.

Chemistry
2 answers:
horrorfan [7]3 years ago
8 0
1st qn - B
<span>2nd qn - A 
3 is no
</span>
stellarik [79]3 years ago
6 0
1st qn - B
2nd qn - A
Last qn - Yes
You might be interested in
The quantity of heat required to change the temperature of 1 g of a substance by 1⁰c is defined as
Alex
Specific heat is the quantity of heat required to change the temperature of 1 gram of a substance by 1 degree Celsius. It is the amount per unit mass that is required to raise the temperature by one degree Celsius. Every substance has its own specific heat and each has its own distinct value. The units of specific heat are joules per gram-degree Celsius (J/f C) and sometimes J/Kg K may also be used.
8 0
3 years ago
An archaeologist discovered some charcoal at an excavation site. He sent the samples to a lab for C-14 dating, knowing that the
klio [65]
Here we assume that disintegration has occur so the normal t½ formular will not be used
mathematically we..⅛×5600 =700
therefore it is about 700years option A
7 0
3 years ago
Fungi have eukaryotic cells (large cells with a nucleus), like animals and plants<br> True or false?
Serggg [28]
True your answer is true
8 0
3 years ago
A chemist adds 0.60L of a 0.20/molL sodium thiosulfate Na2S2O3 solution to a reaction flask. Calculate the millimoles of sodium
Serggg [28]

Answer:

1.2×10² mmole of Na₂S₂O₃

Explanation:

From the question given above, the following data were obtained:

Volume = 0.6 L

Molarity = 0.2 mol/L

Mole of Na₂S₂O₃ =?

Molarity is simply defined as the mole of solute per unit litre of water. Mathematically, it is expressed as:

Molarity = mole /Volume

With the above formula, we can obtain the number of mole of Na₂S₂O₃ in the solution as illustrated below:

Volume = 0.6 L

Molarity = 0.2 mol/L

Mole of Na₂S₂O₃ =?

Molarity = mole /Volume

0.2 = Mole of Na₂S₂O₃ / 0.6

Cross multiply

Mole of Na₂S₂O₃ = 0.2 × 0.6

Mole of Na₂S₂O₃ = 0.12 mole

Finally, we shall convert 0.12 mole to millimole (mmol). This can be obtained as follow:

1 mole = 1000 mmol

Therefore,

0.12 mole = 0.12 mole × 1000 mmol / 1 mole

0.12 mole = 120 = 1.2×10² mmole

Thus, the chemist added 1.2×10² mmole of Na₂S₂O₃

7 0
3 years ago
CaCO3(s)+2H*(aq) →Ca2+ (aq)+H2001+CO262)
Effectus [21]

Answer:CO2(g) will be formed at a faster rate in experiment 2 because more H+ particles can react per unit time

Explanation:

8 0
3 years ago
Other questions:
  • Question 22 Write the empirical formula for at least four ionic compounds that could be formed from the following ions:
    10·1 answer
  • How do meteorologists make accurate weather predictions?
    9·1 answer
  • Must show work for questions. Please also explain, I don't understand.
    8·1 answer
  • When 24.5 g of CaC12 reacted with plenty of AgN03, 21.5 grams of were produced. What was the percent yield of Ca(No2)3
    15·1 answer
  • What describes the element Mg.
    14·1 answer
  • What is the net ionic equation for the reaction between nickle (II) chloride and silver (I) nitrate?
    5·1 answer
  • if you react 28 grams of butene with excess hydrogen how many grams of butane would you expect to get
    12·1 answer
  • Both a siren passing by and radar exhibit the Doppler effect. What is the main
    14·2 answers
  • Which has a lower electronegativity: sodium or rubidium?
    11·1 answer
  • How can teh human body looose heat? (conduction, convecion, radiation) and WHY
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!