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
swat32
3 years ago
13

When heating liquid materials in laboratory glassware, a student should always

Chemistry
2 answers:
Lelechka [254]3 years ago
5 0

Answer:

be careful to not hurt yourself

Nady [450]3 years ago
4 0

Answer: make sure the liquid is pointing away from the face

Explanation:

You might be interested in
in the two stage cooling method what is the maximum amount of time allowed for both stages cooling food from 135 to 41 degrees F
BlackZzzverrR [31]
In the past, restaurants had four hours, straight through, to cool food to 41°F or lower. Now the FDA recommends cooling food in two stages -- from 135°F to 70°F in two hours then from 70°F to 41°F or lower in an additional four hours for a total cooling time of six hours
Explanation:
the two-stage cooling method<span> is a </span><span>Food Code </span>counselled<span> procedure for cooling food in restaurants and foodservice </span>institutions<span>. </span>within the<span> two-stage cooling </span>methodology<span>, food is</span><span> cooled from 140° F (60° C) to 70° F (21° C) </span>among 2<span> hours and to 41° F (5° C) or lower </span>among<span> four hours. Use of this cooling </span>methodology<span> ensures that food is cooled quickly and safely and has no harmful effects.</span>
3 0
3 years ago
Read 2 more answers
The elements of the group IA are termed as alkali metals, because their ___ are alkaline.
Vadim26 [7]

The answer is hydroxides.

The elements of the group IA are termed as alkali metals, because their hydroxides are alkaline.

7 0
2 years ago
Be sure to answer all parts. What is the [H3O+] and the pH of a buffer that consists of 0.26 M HNO2 and 0.89 M KNO2? (K, of HNO2
Aleksandr-060686 [28]

Answer : The H_3O^+ ion concentration is, 1.12\times 10^{-3}M and the pH of a buffer is, 2.95

Explanation : Given,

K_a=7.1\times 10^{-4}

Concentration of HNO_2 (weak acid)= 0.26 M

Concentration of KNO_2 (conjugate base or salt)= 0.89 M

First we have to calculate the value of pK_a.

The expression used for the calculation of pK_a is,

pK_a=-\log (K_a)

Now put the value of K_a in this expression, we get:

pK_a=-\log (7.1\times 10^{-4})

pK_a=4-\log (7.1)

pK_a=3.15

Now we have to calculate the pH of the solution.

Using Henderson Hesselbach equation :

pH=pK_a+\log \frac{[Salt]}{[Acid]}

pH=pK_a+\log \frac{[KNO_2]}{[HNO_2]}

Now put all the given values in this expression, we get:

pH=3.15+\log (\frac{0.89}{0.26})

pH=2.95

The pH of a buffer is, 2.95

Now we have to calculate the H_3O^+ ion concentration.

pH=-\log [H_3O^+]

2.95=-\log [H_3O^+]

[H_3O^+]=1.12\times 10^{-3}M

The H_3O^+ ion concentration is, 1.12\times 10^{-3}M

4 0
3 years ago
Nuclear energy could come from
lianna [129]
Nuclear energy comes from splitting of Barium atom to form Krypton atom
5 0
3 years ago
Electron Identify the type of charge of the following particles in an
Alexeev081 [22]

Answer:

Electron charge: -1

Neutron charge: 0

Proton charge: +1

5 0
3 years ago
Other questions:
  • which type of particle is not present in the same amount as the other types of particles in a neutral atom
    7·1 answer
  • What happens to the volume when we INCREASE the pressure?
    8·1 answer
  • What is a goal of the planned mission MIRI?
    13·2 answers
  • How many moles of water are in 24.3 grams of water?
    12·2 answers
  • The Periodic Table is arranged according to?
    5·2 answers
  • A sailor on a trans-Pacific solo voyage notices one day that if he puts 375. mL of fresh water into a plastic cup fresh water we
    8·1 answer
  • Determine the number of moles in 1.5 x 10^25<br> atoms of iron.
    15·1 answer
  • Cells are made of many parts, or , that help the cell do its job. Each cell organelle has a specific function, or
    13·1 answer
  • Please answer it!! Would appreciate a lot!!
    5·1 answer
  • _HNO3+ Fe+2
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!