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Alexandra [31]
3 years ago
11

What is the difference between the mass of a solid and the mass of a liquid?

Chemistry
1 answer:
irina [24]3 years ago
5 0

Answer:

Thank you for the points

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Calculate the number of grams of deuterium in an 80,000-L swimming pool, given deuterium is 0.0150% of natural hydrogen
fiasKO [112]

Answer:

m_{Deu}=2666.7g

Explanation:

Hello,

In this case, we can apply the following mole-mass-density relationship in order to compute the required grams of deuterium, considering that it is the 0.0150% (molar basis) of natural hydrogen (H₂):

m_{Deu}=80000LH_2O*\frac{1000gH_2O}{1LH_2O}*\frac{1molH_2O}{18gH_2O}   *\frac{1molH_2}{1molH_2O} *\frac{2gH_2}{1molH_2} *\frac{2*0.0150g\ Deu}{100gH_2} \\\\m_{Deu}=2666.7g

Best regards.

4 0
3 years ago
What test was used to identify hydrogen gas? Write a balanced equation to represent the test?
const2013 [10]
Burning splint test
2H2 (g) + O2 (g) -> 2H20 (g) + heat
It’s a combustion reaction
6 0
3 years ago
The number of electrons in the valence shell of elements a and b, are 6 and 7 respectively. what is the formula and type of bond
ziro4ka [17]
A: carbon
b: nitrogen
type of bond: covalent bond
formula: a3b4
3 0
3 years ago
How much energy must be added to a 1 kg piece of gold with a specific heat of 130 j/kg to increase its temperature from 20 c to
Lorico [155]

Q = 10.4 \; \text{kJ}

The specific heat of a material gives the energy it takes to increase the temperature of one unit mass of the material by one unit temperature. The SI unit for specific heat c is therefore \text{J} /\text{kg} \cdot \textdegree{\text{C}}.

The formula relating the energy required to raise the temperature of m grams of a substance with specific energy c by \Delta T degrees is

Q= c \cdot m \cdot \Delta T

The question provides the following information:

  • c = 130\; \text{J} /\text{kg} \cdot \textdegree{\text{C}} for gold
  • m= 1 \; \text{kg}
  • \Delta T = 100 \textdegree{\text{C}} - 20 \textdegree{\text{C}} = 80 \textdegree{\text{C}}

Apply the formula:

\begin{array}{ccc} Q & = & c \cdot m \cdot \Delta T\\  & = & 130 \; \text{J} \cdot \text{kg}^{-1} \cdot \textdegree{\text{C}}^{-1} \times 1 \; \text{kg} \times 80 \;  \textdegree{\text{C}}\\ & = & 1.04 \times 10^{4} \;\text{J}\\ & = & 10.4 \; \text {kJ} \end{array}

7 0
4 years ago
P 1. Elements X and Y react to form an ionic compound a formula XY. What could be the proton (atomic) numbers of X and Y?
larisa86 [58]

Answer:

the answer is C

Explanation:

This is because group6 elements are diatomic and when they are chemically combined their subscript 2 cancels out

6 0
2 years ago
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