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4 years ago

HEPL ME WHO EVER ANSWERS GET BRAINLIEST

Chemistry

2 answers:

rodikova [14]4 years ago

6 0

B, I’m answering so you can give him brainliest

pishuonlain [190]4 years ago

3 0

B is the most accurate answer, but it actually means 'part of a whole'.

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Which is the next logical step in balancing the given equation?

Leya [2.2K]

To balance the given equation, we apply elemental balance and count each elements per side. There are 2 nitrogens in the left side so there should be 2 moles of NO2. Since there are already 4 moles of O in the right side, there should be 2 moles of O2. Hence answer is a. Place the coefficient 2 in front of oxygen and nitrogen dioxide.

3 0

3 years ago

Read 2 more answers

The sum of two number is 50,and their difference is 30.find the sum

kompoz [17]

Answer:

40 and 10

Explanation:

40 plus 10 is 50 40 minus 10 is 30

4 0

3 years ago

Read 2 more answers

A dunk tank hold 30,533 moles of water? How many grams of water are in the tank?

liubo4ka [24]

The mass of water in the tank, given the data from the question is 549594 g

<h3> Description of mole </h3>

The mole of a substance is related to it's mass and molar mass according to the following equation:

Mole = mass / molar mass

<h3>How to determine the mass of water in the tank</h3>

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

Mole of water = 30533 moles
Molar mass of water = 18 g/mol
Mass of water = ?

The mass of the water can be obtained as follow:

Mass = mole × molar mass

Mass of water = 30533 × 18

Mass of water = 549594 g

Learn more about mole:

brainly.com/question/13314627

#SPJ1

3 0

2 years ago

According to the balanced chemical equation

Nadusha1986 [10]

Answer:

A) 15.5 mL

Explanation:

Given, Mass of oxalic acid = 0.3500 g

Molar mass of oxalic acid = 90.03 g/mol

The formula for the calculation of moles is shown below:

$moles = \frac{Mass\ taken}{Molar\ mass}$

Thus,

$Moles= \frac{0.3500\ g}{90.03\ g/mol}$

$Moles\ of\ oxalic\ acid= 0.0038876\ mol$

According to the given reaction:

$5H_2C_2O_4_{(aq)}+2MnO_4^-_{(aq)}+6H^+_{(aq)}\rightarrow 10CO_2_{(g)}+2Mn^{2+}_{(aq)}+8H_2O_{(l)}$

5 moles of oxalic acid react with 2 moles of potassium permanganate

Thus,

1 mole of oxalic acid react with 2/5 moles of potassium permanganate

0.0038876 mole of oxalic acid react with $\frac {2}{5}\times 0.0038876$ moles of potassium permanganate

Moles of potassium permanganate = 0.001555 moles

Also, considering:

$Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}$

Molarity = 0.100 M

So,

$0.100=\frac{0.001555}{Volume\ of\ the\ solution(L)}$

Volume = 0.01555 L

Also, 1 L = 1000 mL

So, volume = 15.5 mL

6 0

3 years ago

Given that nitrogen forms three bonds with hydrogen to make <img src="https://tex.z-dn.net/?f=NH_%7B3%7D" id="TexFormula1" title

lbvjy [14]

Answer:

Three hydrogen atoms to form PH₃.

Explanation:

Hello!

In this case, since the elements belonging to the nitrogen family (N, P, As, Sb and Bi) show five valence electrons, because there are five electrons at their outer shell, it is clear that if phosphorous bonds with hydrogen, it is going to require the same amount of oxygen atoms (3) because elements having five valence electrons need 3 bonds in order to attain the octet (5+3=8).

Therefore the compound would be:

$PH_3$

Which is phosphine.

Best regards!

3 0

3 years ago