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natima [27]
3 years ago
9

What type of reaction occurs when energy is released?​

Chemistry
1 answer:
Charra [1.4K]3 years ago
5 0
Exothermic is a chemical reaction that releases energy.
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A student added three volumes: 0.351 ml, 0.350 ml and 0.349 ml. The total volume should be reported (type the units too) as:
Lostsunrise [7]

Answer:- 1.050 mL

Solution:- Volume is an additive property. So, we add all the three given volumes to get the total volume.

Total volume = 0.351mL+0.350mL+0.349mL=1.050mL

Since in addition, we go with least decimal places, the answer must have three decimal places as all the given numbers have three decimal places each.

Hence, the total volume should be reported as 1.050 mL.

4 0
3 years ago
WHO IS GOOD AT CHEMISTRY EQUATIONS? I NEED A QUESTION ANSWERED BY TONIGHT! ITS THE ONLY ONE IM STUCK ON:
sattari [20]

Answer:

374 atoms would be present in 22 units of aluminum sulfate.

Explanation:

Formula for Aluminium Sulfate :  Al₂(SO₄)₃

Al = 2

S = 1

O = 4

(SO) = 3

∴ Number of atom in one unit is :  2 + (1+4)3 ==> 17

If there are 17 atoms in one unit, therefore;

Number of atoms in 22 units = 17 x 22

                                                = 374 atoms

4 0
3 years ago
I need help with this question, thanks.
kotykmax [81]

Answer:

well I think it will be

C.

7 0
3 years ago
The polyatomic nitrate ion (NO3−) is present in both the products and the reactants of the chemical equation shown below.
Diano4ka-milaya [45]

Answer:

There is one nitrate ion in the products, and two in the reactants of this equation.

Explanation:

1: We know a nitrate ion has the formula NO_{3}^{- , so we just need to count how many of them are on each side of the equation.

2: To find how many are in the reactants of the equation, you look at the left hand side (before the arrow). You can see the section (NO_{3} )_{2} , which shows that there are two nitrate ions in the reactant side (as seen by the little 2).

3: To find how many are on the products side, you do the same thing - this time there is only one NO_{3}^{- in the lithium nitrate.

So, there is one nitrate ion in the products, and two in the reactants of this equation.

7 0
3 years ago
Read 2 more answers
Convert 9.32x 10 23ª atoms of au to moles of au
7nadin3 [17]

Answer:

\huge\boxed{\sf no.\ of\ moles = 1.55\ moles }

Explanation:

<u>Given:</u>

Number of atoms = 9.32 \times 10^{23} atoms

Avogadro's Number = 6.023 \times 10^{23} atom / mol

<u>Required:</u>

Moles = ?

<u>Formula:</u>

\displaystyle No.\ of\ moles = \frac{no. \ of \ atoms }{avogadro's \ no.}

<u>Solution:</u>

\displaystyle no. \ of \ moles = \frac{9.32\times 10^{23}}{6.023 \times 10^{23}}

no. of moles = 1.55 moles

\rule[225]{225}{2}

Hope this helped!

<h3>~AH1807</h3>
5 0
3 years ago
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