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alexira [117]
2 years ago
11

hola todos que tengan un lindo día mi hijo quiere saber esta respuesta se lo daría yo pero tengo mucho trabajo y bueno se los de

jo a ustedes espero que se lo respondan bien, muchas gracias que tengan buenos días como dije antes saludos

Chemistry
1 answer:
Butoxors [25]2 years ago
6 0

Answer:

3.

(A) 1,000 gramos en un kilogramo.

(B) 8 kilogramos

(C) 1,500 gramos en un kilogramo y medio

(D) 5.5 kilogramos

4.

(A) 283 grados Kelvin

(B) 423 grados Kelvin

(C) 27 grados Celsius

(D) -3 grados Celsius

5.

Unidades de Tiempo

(A) 600 seg

(B) 420 min

(C) 12,600 seg

(D) 2,280 seg

Unidades de Longitud

(A) 2,000 m

(B) 12,000 m

(C) 7.587 km

(D) 5.5 m

Unidades de Masa

(A) 15,000 g

(B) 0.7 kg

(C) 12 kg

(D) 4,500 g

Unidades de Temperatura

(A) 302 K

(B) 121°C

(C) 343 K

(D) -8°C

6.

a) metros

b) centimetros

c) centimetros

d) kilometros

e) kilometros

7.

a) 14.76 m

b) 1,476 cm

8.

a) El auto mas rapido es el segundo. 45/5= 9 metros en un segundo.

b) El primero. El segundo recorre 7m en un segundo 35/5= 7.

9.

a) 100 centavos en 1 peso.

b) 1,060 centavos en 10.60 pesos.

c) 6.50 pesos

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Degger [83]
The answers is B that’s your answer
4 0
2 years ago
Gold has density of 19.3 g/cm3; how many grams of gold are in a 16.0 cm3 gold bar?
Andre45 [30]
To determine the mass of gold, we simply multiply the density and volume. Density is a value for mass, such as kg, divided by a value for volume, such as m3. Density is a physical property of a substance that represents the mass of that substance per unit volume. We do as follows:

mass = density x volume
mass = 19.3 g/cm^3 ( 16.0 cm^3 )
mass = 308.8 g
6 0
3 years ago
The equation shown represents cellular respiration. Glucose + X → Y + Water + Energy What do X and Y most likely represent? X re
777dan777 [17]

Answer:

X represents oxygen and Y represents carbon dioxide.

Explanation:

Because in respiration, you consume oxygen and make carbon dioxide whereas, in photosynthesis, the equation is reversed and you use carbon dioxide and make oxygen and glucose.

4 0
3 years ago
Newton’s second law of motion is F=ma A net force of 60 N north acts on an object with a of 30 kg. Use Newton’s second law of mo
horsena [70]
I’m pretty sure the immediate answer is 2. Using the equation 60N=(30kg)x2(whatever unit of measure) also it will change because if you change the mass or the Net Force, your going to have to redo the equation based on the new information.
8 0
3 years ago
Read 2 more answers
Given these reactions, X ( s ) + 1 2 O 2 ( g ) ⟶ XO ( s ) Δ H = − 668.5 k J / m o l XCO 3 ( s ) ⟶ XO ( s ) + CO 2 ( g ) Δ H = +
qwelly [4]

<u>Answer:</u> The \Delta H^o_{rxn} for the reaction is -1052.8 kJ.

<u>Explanation:</u>

Hess’s law of constant heat summation states that the amount of heat absorbed or evolved in a given chemical equation remains the same whether the process occurs in one step or several steps.

According to this law, the chemical equation is treated as ordinary algebraic expressions and can be added or subtracted to yield the required equation. This means that the enthalpy change of the overall reaction is equal to the sum of the enthalpy changes of the intermediate reactions.

The given chemical reaction follows:

X(s)+\frac{1}{2}O_2(g)+CO_2(g)\rightarrow XCO_3(s)      \Delta H^o_{rxn}=?

The intermediate balanced chemical reaction are:

(1) X(s)+\frac{1}{2}O_2(g)\rightarrow XO(s)    \Delta H_1=-668.5kJ

(2) XCO_3(s)\rightarrow XO(s)+CO_2     \Delta H_2=+384.3kJ

The expression for enthalpy of the reaction follows:

\Delta H^o_{rxn}=[1\times \Delta H_1]+[1\times (-\Delta H_2)]

Putting values in above equation, we get:

\Delta H^o_{rxn}=[(1\times (-668.5))+(1\times (-384.3))=-1052.8kJ

Hence, the \Delta H^o_{rxn} for the reaction is -1052.8 kJ.

7 0
3 years ago
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