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3 years ago

Help please first person to get it right gets my old Netflix account

Chemistry

2 answers:

spin [16.1K]3 years ago

7 0

Butterflies are cold-blooded and need the light from the sun to warm the muscles they use to fly. Not only do butterflies like the sun, the plants the they thrive on need full direct sun. Most plants need at least 8 hours of sunlight to bloom properly and provide enough nectar.

likoan [24]3 years ago

6 0

Answer:

Most Monarch butterflies live only for a few weeks However, some will migrate to warmer climates and survive the entire winter.

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9. What type of bonds hold polyatomic ions together?

ella [17]

The answer is B Covalent bonds

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3 years ago

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Use the unbalanced equation NH3 + O2 = NO + H2O, what is the mole ratio between NH3 and NO

kirill115 [55]

The first thing that needs to be done in order to answer the question above is to balance first the chemical equation by seeing to that the number of moles of a certain element on the reactant side is equal to the number of moles in the product side. 4NH3 + 5O2  4NO + 6H2O The mole fraction between the NH3 and NO is therefore 4:4 or 1:1.

4 0

3 years ago

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In a particular reaction, 53.8 g of liquid silicon tetrachloride is added to 65.0 g of solid magnesium to produce solid magnesiu

kotykmax [81]

Answer: Mg is the excess reactant for the forward reaction.

Explanation: It is a stoichiometry problem and solved with the help of given grams and using balanced equation. Grams of both the reactants are converted to moles and divided by their coefficients. The excess reactant is the one for which we get the highest number on doing above steps.

The balanced equation is:

$SiCl_4(l)+2Mg(s)\rightarrow 2MgCl_2(s)+Si(s)$

Molar mass of silicon tetra chloride is 169.9 gram per mol and the molar mass of Mg is 24.3 gram per mol.

$53.8gSiCl_4(\frac{1mol}{169.9g})$

= $0.317molSiCl_4$

$65.0gMg(\frac{1mol}{24.3g})$

= 2.67 mol Mg

From balanced equation, the coefficient of silicon tetra chloride is 1 and that of Mg is 2. So, we will divide the moles of silicon tetra chloride by 1 and that of Mg by 2 and see which one gives highest number.

For silicon tetra chloride, $\frac{0.317}{1}$ = 0.317

and for Mg, $\frac{2.67}{2}$ = 1.34

The highest number is for Mg and so the excess reactant for the forward reaction is Mg.

7 0

3 years ago

BrO3- (aq) + NO2(aq) → Br-(aq) + NO3-(aq) Balance this reaction in acidic conditions?

Thepotemich [5.8K]

Answer:

BrO₃⁻ (aq) + NO₂(aq) + 4 H⁺→ Br⁻(aq) + NO₃⁻ + 2 H₂O

Explanation:

The law of conservation of matter states that since no atom can be created or destroyed in a chemical reaction, the number of atoms that are present in the reagents has to be equal to the number of atoms present in the products.

Then, you must balance the chemical equation. For that, you must first look at the subscripts next to each atom to find the number of atoms in the equation. If the same atom appears in more than one molecule, you must add its amounts.

The coefficients located in front of each molecule indicate the amount of each molecule for the reaction. This coefficient can be modified to balance the equation, just as you should never alter the subscripts.

By multiplying the coefficient mentioned by the subscript, you get the amount of each element present in the reaction.

Then, taking into account all of the above, you can determine the amount of elements on each side of the equation:

Left side: 1 Br, 5 O and 1 N

Right side: 1 Br, 3 O and 1 N

If the reaction occurs in an acidic medium:

Each excess oxygen atom is balanced by adding a molecule of water to the other side of the reaction.
Hydrogens are balanced by adding protons (H⁺) on the opposite side to the water molecules.

So, balancing the oxygen:

BrO₃⁻ (aq) + NO₂(aq) → Br⁻(aq) + NO₃⁻ + 2 H₂O

Left side: 1 Br, 5 O and 1 N

Right side: 1 Br, 5 O, 1 N and 4 H

Then, balancing the hydrogens:

BrO₃⁻ (aq) + NO₂(aq) + 4 H⁺→ Br⁻(aq) + NO₃⁻ + 2 H₂O

Left side: 1 Br, 5 O, 1 N and 4 H

Right side: 1 Br, 5 O, 1 N and 4 H

You can see that you have the same amount on each side of the reaction. So the reaction is balanced.

6 0

3 years ago

What is the identity of the atom shown?

posledela

Answer:

Explanation:

Argon has 17 protons and 18 neutron

atomic number is the same as the protons number.

3 0

3 years ago

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Help please first person to get it right gets my old Netflix account​

Help please first person to get it right gets my old Netflix account