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Verizon [17]
3 years ago
7

I need help with like 35 questions anyone willing to help please let me know I have discord

Chemistry
1 answer:
posledela3 years ago
3 0

Answer and Explanation:

The molar mass of a substance is all of the weights from the elements combined.

So, we have the elements

CU, S, and O_{4}

CU has a mass is 65

S mass is 32

O has a mass of 16, but there's 4 atoms of O, so we do 16 times 4, which is 64.

Now we add.

65 + 32 + 64 is 161.

<u>So, the answer is 160, or answer choice A.</u>

<em><u>#teamtrees #PAW (Plant And Water)</u></em>

You might be interested in
Describe light with respect to its speed and its dual nature as both a wave and a particle.
Sedbober [7]

Answer:

Scientists have been debating over light being a wave or particle since its recognition.

Sir Issac Newton discovered that light had frequency and other properties. Newton described light to be a particle because it created shadows which were sharp and very clear.

Francesco Maria Grimaldi, claimed that light was a wave. This was because this scientist observed the diffraction of light and hence, claimed light to be a type of wave.

The speed of light is 299 792 458 m / s. Nothing can travel faster than light.

5 0
4 years ago
Mixing solutions of sodium hydroxide and rubidium nitrate will cause rubidium hydroxide to precipitate. You have a 1.50 mol/L so
Crazy boy [7]

Answer:

97.6 mL of Sodium Hydroxide and 732 mL of Rubidium Nitrate are needed to make 15 g of Rubidium hydroxide.

Explanation:

The chemical reaction described in the question can be given as

NaOH + RbNO₃ → RbOH + NaNO₃

We want to find the amount of each reactant that reacted to give 15 g of RbOH

Amount of RbOH produced from the reaction = 15 g,

We first convert to number of moles, to be able to obtain the number of moles of each reactant from the stoichiometric balance of the reaction.

Number of moles = (Mass)/(Molar Mass)

Molar Mass of RbOH = 102.475 g/mol

Number of moles of RbOH produced from the reaction = (15/102.475) = 0.1464 moles.

Note that from the stoichiometric balance of the reaction,

1 mole of RbOH was produced from 1 mole of RbNO₃

And

1 mole of RbOH was produced from 1 mole of NaOH.

So,

0.1464 mole of RbOH will be produced from 0.1464 mole of RbNO₃

And

0.1464 mole of RbOH will be produced from 0.1464 mole of NaOH

Note that,

Number of moles = (Concentration in mol/L) × (Volume in L)

For RbNO₃,

Number of moles = 0.1464 mole

Concentration in mol/L = 0.200 mol/L

Volume in L = ?

0.1464 = 0.2 × (Volume in L)

Volume in L = (0.1464/0.20) = 0.732 L = 732 mL

For NaOH,

Number of moles = 0.1464 mole

Concentration in mol/L = 1.50 mol/L

Volume in L = ?

0.1464 = 1.50 × (Volume in L)

Volume in L = (0.1464/1.50) = 0.0976 L = 97.6 mL

Hope this Helps!!!

4 0
3 years ago
The total number of atoms represented by the formula (NH4)2Cr2O7 is
a_sh-v [17]

Answer:

its 19 I'm pretty sure about

6 0
3 years ago
Read 2 more answers
In an experiment, onion plants of different ages were exposed to various amounts of caffeine to determine the effect of caffeine
VladimirAG [237]
A. is definitely true. The age of the plants and the amount of caffeine are two variables. The experimenter should have used only plants of the same age in order to determine the effect of caffeine.
b. is wrong. The amount of caffeine used was a variable.
c. is wrong. Temperature, water, and light were constants.
d. is wrong. The statement is a hypothesis that the experiment is trying to prove
5 0
3 years ago
The following are all ionic except:<br>a) KF b) CaCl2 c) NaI d) NaH e) SiO2​
klasskru [66]
B i think correct if wrong
4 0
3 years ago
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