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WINSTONCH [101]
3 years ago
7

Which is a property of all atoms?

Chemistry
2 answers:
Oksana_A [137]3 years ago
5 0
B. A nucleus with a positive charge
Thepotemich [5.8K]3 years ago
4 0
B. a nucleus with a positive charge.
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What were Lamarck's ideas about evolution and why were those ideas incorrect
4 0
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Please help......A 0.01 g bullet travels with a velocity of 1500 m/s. What is its momentum?
elena-s [515]

Answer:

hope this helps you

Explanation:

Example 1: A 20 kg object has a velocity of 4.5 m/s in the positive x direction. ... What is the momentum of a 3000 kg truck traveling at 25 m/s? 2. A 1500 kg ferryboat has a momentum of 25000 kg∙m/s. ... *A 0.01 kg bullet has a speed of 700 m/s before it strikes a 0.95 kg wooden block ... We will be going outside so please.

4 0
3 years ago
Calculate the mass of magnesium oxide produced when 0.645 g of magnesium hydroxide is the is completely decomposed.
FrozenT [24]

Answer:

0.44g

Explanation:

Given parameters:

Mass of magnesium hydroxide = 0.645g

Solution

The balanced reaction equation is shown below:

                             Mg(OH)₂ → MgO + H₂O

From the equation above, we see that the number of atoms are conserved.

To find the mass of magnesium oxide produced, we find the number moles of the decomposed magnesium hydroxide first:

      Molar mass of Mg(OH)₂ = 24 + 2(16+1) = 58g/mol

Number of moles of Mg(OH)₂ = \frac{mass}{molar mass}

                                                  =  \frac{0.645}{58}

                                                  = 0.011mole

Now, from the balanced equaiton, we know that:

     1 mole of Mg(OH)₂ produces 1 mole of MgO

Therefore, 0.011mole of Mg(OH)₂ will produce 0.011mole of MgO

so mass of MgO = number of moles of MgO x molar mass of MgO

   Molar mass of MgO = 24 + 16 = 40g/mol

     mass of MgO = 0.011 x 40 = 0.44g

8 0
4 years ago
Does anyone know what Yttrium(II) Dichromate's formula would look like?
White raven [17]

Answer:

YCr2O7

Explanation:

3 0
3 years ago
Activation energy Group of answer choices is only required in catabolic reactions that release energy. is not required at all wh
daser333 [38]

Answer:

is used to break reactant bonds and/or make new product bonds.

Explanation:

<em>The correct answer would be that </em><em>activation energy is used to break reactant bonds and/or make new product bonds</em><em>.</em>

The <u>activation energy is the minimum energy that must be overcome by the reactants in a reaction in other to become products</u>. In order for products to be formed, the bonds between reactants must be broken and new ones must be formed to arrive at the products. In other words, the activation energy can be seen as the energy required to break the bonds between reactants and form the bonds between products during the course of a reaction.

<em>Activation energy is required even in the presence of enzymes. The latter only catalyzes reactions by lowering the minimum energy required to break the bonds between reactants and form new ones between products</em>.

5 0
3 years ago
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