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Marizza181 [45]
2 years ago
9

un estudiante de noveno año, quiere realizar varias mezclas de compuestos quimicos y tiene un frasco rotulado con la formula qui

mica : MgO ¿CUAL ES EL NOMRE DEL COMPUESTO?
Chemistry
2 answers:
anastassius [24]2 years ago
6 0

Answer:

el óxido de magnesio es la respuesta

olganol [36]2 years ago
6 0

Answer:

Magnesium oxide (Óxido de magnesio)

Explanation:

Mg: Magnesium (Magnesio)

O: Oxygen (Oxígeno)

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21.7 mL of gas at 98.8 kPa is allowed to expand at constant
IRISSAK [1]

Answer: 40.68 kPa

Explanation:

Given that,

Original volume of gas V1 = 21.7 mL

Original pressure of gas P1 = 98.8 kPa

New volume of gas V2 = 52.7 mL

New pressure of gas P2 = ?

Since pressure and volume are given while temperature is constant, apply the formula for Boyle's law

P1V1 = P2V2

98.8 kPa x 21.7 mL = P2 x 52.7L

2143.96 kPa L = 52.7 L x P2

P2 = 2143.96 kPa L / 52.7 L

P2 = 40.68 kPa

Thus, the new pressure of the gas is 40.68 kPa.

5 0
3 years ago
Calculate the following:
Brrunno [24]

Follow these steps to solve the given equation:

Multiply the two decimal figures together and find the sum of the exponents, that is,

(1.5 * 1.89) * 10 ^4+3

(2.835) * 10^7

10^7 can also be written as e.70

'e' stands for exponential. 

Therefore, we have  2. 835 e 7.0 = 2.8 e 7.0.

Based on the calculations above, the correct option is A. 

4 0
3 years ago
Granite was formed slowly as magma cooled. What is the result of the slow cooling?
Aleksandr-060686 [28]
Igneous rocks from cooling magma<span>. </span>Granite<span> is an igneous rock </span>formed<span> from </span>magma<span>that </span>cooled slowly<span> underground. As the </span>magma slowly cools<span>, large mineral crystals form.

</span>
4 0
2 years ago
Read 2 more answers
The equilibrium concentrations of the reactants and products are [ HA ] = 0.260 M [HA]=0.260 M , [ H + ] = 2.00 × 10 − 4 M [H+]=
ValentinkaMS [17]

Answer:

pKa of the acid HA with given equilibrium concentrations is 6.8

Explanation:

The dissolution reaction is:

HA ⇔ H⁺ + A⁻

So at equilibrium, Ka is calculated as below

Ka = [H⁺] x [A⁻] / [HA] = 2.00 x 10⁻⁴ x 2.00 x 10⁻⁴ / 0.260

    = 15.38 x 10⁻⁸

Hence, by definition,

pKa = -log(Ka) = - log(15.38 x 10⁻⁸) = 6.813

7 0
3 years ago
Help me
irinina [24]

Answer:

you can do a celser lava lamp its really easy, i can give you a link if you need?

Explanation:

3 0
2 years ago
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