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3 years ago

What can you do differently for

Chemistry

1 answer:

drek231 [11]3 years ago

3 0

Answer:

I would say, what helps me is really paying attention in class and asking questions, also making sure you study for upcoming test's and quizzes and completely assingments on time

Explanation:

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Classify each of the following substances as either a strong or weak acid, strong or weak base, or a soluble or insoluble salt.

sleet_krkn [62]

Answer:

KOH is a strong base, $HClO_{4}$ is a strong acid, $HNO_{2}$ is a weak acid, NaBr is a soluble salt and $PbCl_{2}$ is an insoluble salt

Explanation:

According to solubility rule, all chlorides, bromides and iodides of metal ions are soluble except for $Pb^{2+},Ag^{+}$ and Hg^{+}[/tex].

Therefore NaBr is a soluble salt and $PbCl_{2}$ is an insoluble salt.

There are seven strong acids : HCl, HBr, HI, $H_{2}SO_{4}$ , $HNO_{3}$ , $HClO_{3}$ and $HClO_{4}$ .

All group IA metal hydroxides e.g. NaOH, KOH etc. are strong base. Also, $Ca(OH)_{2}$ , $Sr(OH)_{2}$ and $Ba(OH)_{2}$ are strong bases.

So, KOH is a strong base, $HClO_{4}$ is a strong acid and $HNO_{2}$ is a weak acid.

6 0

4 years ago

How much momentum does a 2000kg elephant have that is charging at 11m/s

Novay_Z [31]

Answer:

P = 22000 kg. m/s

Explanation:

Given data;

Mass of elephant = 2000 Kg

Velocity = 11 m/s

Momentum = ?

Solution:

Momentum is the product of mass and velocity of an object.

It can be calculated from given formula:

P = mv

P = momentum

m = mass

v = velocity

Now we will put the values in formula.

P = 2000 Kg × 11 m/s

P = 22000 kg. m/s

6 0

3 years ago

PLEASE HELP ME ASAP!! How many molecules are in 7.5 grams of Oxygen gas?

Juli2301 [7.4K]

It is about 6 x 10^23. So in 5 moles of oxygen gas, which has a mass of 5x16=80 grams, there are 5x6x10^23 = 30x10^23 molecules.

4 0

3 years ago

Need help real quick with these questions

Yuliya22 [10]

Answer:

what are the questions???

8 0

3 years ago

Dalam kajian geografi, cara pandang dan cara pikir terhadap objek material dari sudut geografi disebut objek

Alex_Xolod [135]

Hal di atas disebut sebagai objek: Formal
Objek formal Merupakan cara pandang dan cara pikir terhadap objek material dari sudut geografi. Cara pandang dan cara pikir terhadap objek material dilihat dari segi geografis yang akan melingkupi keruangan, kelingkungan, dan kompleks wilayah,serta waktu.

6 0

3 years ago